7. October 2026

Do You Need to File Self Assessment If Tax Has Already Been Deducted?

Article written by PR Accountants LTD in the category Self Assessment

Seeing tax deducted from an income payment can create a false sense that the tax position has been completed.

An employee may see Income Tax deducted under PAYE. A construction subcontractor may receive payment after a 20% or 30% CIS deduction. A non-resident landlord may have tax withheld by a letting agent. A pension provider may deduct tax from a withdrawal. Foreign income may arrive after overseas tax has been taken.

In each case, tax has been deducted. However, the reporting result is not necessarily the same.

Sometimes the deduction fully deals with the liability and no Self Assessment return is needed. Sometimes the deduction is only a payment towards a final tax calculation. Sometimes the amount deducted is too high and a return is needed to claim the correct credit or refund. In other cases, the deduction is too low because the payer did not know about the person's other income, allowances, reliefs or tax charges.

The correct question is therefore not simply:

Has tax already been deducted?

It is:

Does the tax deducted settle the person's complete UK tax position, and does a separate rule still require a Self Assessment return?

This guide explains how to answer that question for the 2025/26 tax year, including PAYE, CIS, pensions, foreign income, non-resident landlords, trusts, payments on account and tax refunds.

What does tax deducted at source mean?

Tax deducted at source is tax taken from an income payment before the recipient receives the balance.

Common examples include:

Income Tax deducted from employment income through PAYE
Income Tax deducted from occupational or private pension payments
CIS deductions made from payments to construction subcontractors
Tax withheld from a non-resident landlord's UK rental income
Foreign tax deducted from overseas income
Tax treated as paid on certain trust income
Tax deducted from some savings, investment or annual payments

The payer passes, or is expected to pass, the deduction to the relevant tax authority. The recipient receives a net amount.

That deduction can have different legal effects. It may be:

The final tax due on that source of income
A provisional payment towards the final liability
A credit that must be claimed through a return
An amount that can be reclaimed if too much was deducted
An amount that does not cover another liability, such as Class 4 National Insurance, Capital Gains Tax, student loan repayments or the High Income Child Benefit Charge

The label "tax deducted" therefore does not answer whether a return is required.

The short answer

You may still need to file Self Assessment even if tax has already been deducted.

A return will normally still be required where:

HMRC has issued a notice requiring a return
You were self-employed with gross trading income over £1,000
You were a partner in a business partnership
You received CIS income as a sole trader or partner and must report the business
You had rental income that requires Self Assessment
You had foreign income or gains that must be reported
You made a taxable capital gain
You received trust or estate income that must be declared
You need to pay the High Income Child Benefit Charge and are not using PAYE
You are an off-payroll worker who must repay a student or postgraduate loan
You need to claim a relief that must be claimed through Self Assessment
Another source of untaxed or insufficiently taxed income creates a filing requirement

You may not need a return where all your income was dealt with correctly through PAYE, you have no other filing reason and HMRC has not issued a notice to file.

The fact that your salary is high does not now create an automatic Self Assessment requirement where the income is taxed entirely through PAYE. HMRC removed the PAYE-only income threshold from 2024/25. Other income, gains, charges or relief claims can still require a return.

Tax deducted is not the same as tax correctly calculated

A payer calculates tax using the information available to them. That information may be incomplete.

An employer normally uses the tax code supplied by HMRC. The employer may not know about:

Income from another job
Pension income
Rental profit
Self-employment
Dividends
Savings interest
Foreign income
The loss of the Personal Allowance where adjusted net income exceeds £100,000
The High Income Child Benefit Charge
Benefits provided by another employer
Gift Aid or personal pension contributions
Taxable capital gains

A contractor making CIS deductions does not calculate the subcontractor's business profit. The contractor generally deducts tax from the relevant payment under CIS rules, without considering all of the subcontractor's business expenses, other income or National Insurance liability.

A foreign payer applies the rules of the overseas country. The amount withheld may be higher or lower than the UK tax attributable to that income.

Self Assessment brings the relevant income, gains, deductions, allowances and reliefs together. The calculation then establishes whether there is:

More tax to pay
No further tax to pay
A repayment due
A payment on account for the next year

If all your income was taxed through PAYE

Many employees and pensioners do not need Self Assessment because PAYE collects the right amount during the year.

If all the following apply, a return may not be required:

Your income came only from employment or pensions taxed correctly through PAYE
You had no reportable self-employment, property, foreign or investment income
You did not make a taxable capital gain
You do not need to pay the High Income Child Benefit Charge through Self Assessment
You do not need to make a claim that requires a return
HMRC has not issued a notice to file

HMRC normally reviews PAYE information after the tax year. If you paid too much or too little, it may issue a P800 tax calculation or a Simple Assessment. The notice explains how a refund will be paid or how an underpayment must be settled.

If you are already registered for Self Assessment, the reconciliation normally takes place through the tax return instead. HMRC says Self Assessment taxpayers will not normally receive a P800 or Simple Assessment for the same year because the return adjusts the bill.

High employment income alone

The PAYE-only Self Assessment income threshold has been removed.

Previously, employees above a stated income level could be required to file even if their income was taxed through PAYE. For 2024/25 onwards, a person whose income is taxed entirely through PAYE does not need a return solely because it exceeds £150,000.

That does not mean every high-income employee can ignore the tax position.

Higher earners should still check:

Whether the Personal Allowance was withdrawn correctly
Whether several employments used the correct tax codes
Whether bonuses or benefits were included
Whether pension contributions qualify for additional relief
Whether Gift Aid affects adjusted net income
Whether the High Income Child Benefit Charge applies
Whether there are dividends, savings, property or foreign income
Whether there are capital gains

PAYE-only income may remove the automatic filing criterion, but it does not guarantee that the tax code collected the exact final liability.

If HMRC has issued a notice to file

If HMRC has asked you to file a Self Assessment return, tax already deducted does not cancel that notice.

You must normally do one of two things:

File the return by the deadline.
Ask HMRC to withdraw the notice because a return is not required.

Do not simply ignore the request because a P60 shows tax deducted.

Late-filing penalties can arise even where the final calculation shows no additional tax or a repayment. The filing obligation exists because HMRC issued the notice, not because tax must necessarily be paid.

If HMRC agrees that a return is not needed, obtain confirmation that the notice has been withdrawn. Until then, prepare on the basis that the filing deadline still applies.

PAYE income must still be included on a required tax return

If you need Self Assessment for another reason, you must include your employment and pension information even though tax was deducted through PAYE.

For each employment, the return normally requires:

Employer name
Employer PAYE reference
Gross taxable pay
Income Tax deducted
Taxable benefits or expenses
Student or postgraduate loan information where relevant
Employment expenses being claimed

Use the figures from the P60, P45, P11D, final payslip and HMRC records as appropriate.

Do not report only the net pay received into the bank. The return requires the gross taxable amount and the tax deducted as separate figures.

The tax deducted is credited in the Self Assessment calculation. If it is omitted, the calculation may charge tax that has already been paid. If it is overstated, the return may claim an incorrect refund.

Example: employment income plus rental profit

Rina earned a salary of £48,000 in 2025/26 and her employer deducted £7,086 of Income Tax. She also made £8,000 of taxable rental profit.

The PAYE deduction relates mainly to her employment and the tax code used during the year. It does not automatically settle the tax on her rental profit.

Her return must include:

The gross salary
The PAYE tax deducted
The rental income
The allowable property expenses or property allowance, where eligible

The calculation gives credit for the £7,086 already deducted and works out the balance due on the combined position.

Multiple jobs can produce too much or too little tax

PAYE operates separately through each employment or pension source, using the tax codes assigned to them.

Problems can arise where:

The Personal Allowance is duplicated
The Personal Allowance is allocated to the wrong job
A second job uses an emergency code
Two employers pay the person in the same period
One employment ends but continues to appear active
Tax bands are not allocated correctly between sources
Benefits are included late
A pension begins part-way through the year

Tax deducted from each payslip is real, but the combined annual result may still be wrong.

If no Self Assessment return is required, HMRC may correct the position through a P800, a Simple Assessment or a later tax code. If a return is required, enter all employments and deductions so the Self Assessment calculation performs the reconciliation.

Construction Industry Scheme deductions

CIS is one of the clearest examples of tax deducted not removing the need for Self Assessment.

Under CIS, a contractor normally deducts:

20% where the subcontractor is registered and verified
30% where the subcontractor cannot be verified or is not registered correctly
Nothing where the subcontractor has valid gross payment status

The deduction is an advance payment towards the subcontractor's tax and National Insurance. It is not a final tax calculation.

Sole traders and partners

At the end of the tax year, a sole trader or partner should report:

The gross income before CIS deductions
Allowable business expenses
The resulting taxable profit
CIS deductions supported by contractor statements
Other income and relevant reliefs

HMRC calculates the Income Tax and National Insurance due, then gives credit for verified CIS deductions.

The result may be:

Additional tax to pay
No further payment
A refund
A refund reduced by other HMRC debts or liabilities

Example: CIS deductions exceed the final liability

Leon received £40,000 of gross CIS income during 2025/26. Contractors deducted £8,000 under CIS, so £32,000 reached his bank account.

He incurred £16,000 of allowable business expenses. His taxable business profit before other adjustments is therefore £24,000, not £32,000 and not £40,000 less a tax expense.

The return should show:

£40,000 gross turnover
£16,000 allowable expenses
£8,000 CIS tax deducted

HMRC calculates the tax and National Insurance on the profit, then offsets the £8,000. If the deduction exceeds the final liability, Leon may receive a repayment.

The CIS deduction is not an expense

This is a frequent bookkeeping error.

The deduction represents tax paid in advance. It should normally be recorded as a balance recoverable from, or credit with, HMRC until the return is calculated. It is not a cost of earning the income.

If only the net bank receipt is posted as sales, turnover is understated and the CIS credit may be lost.

Check CIS statements before claiming

Subcontractors should retain the monthly payment and deduction statements provided by contractors. The statements should support:

The contractor's name
The gross payment
Any materials excluded from the deduction calculation
The CIS deduction
The net amount paid

Reconcile the annual total to the bookkeeping records and bank receipts. HMRC can ask for evidence and may restrict or delay a repayment where the claim does not match contractor returns.

Limited company subcontractors

CIS deductions suffered by a limited company are not claimed on the director's personal Self Assessment return and should not be used as Corporation Tax payments.

The company normally reports deductions through its payroll scheme using an Employer Payment Summary and sets them against PAYE, National Insurance and CIS liabilities in the prescribed order. Any excess after the tax year may be reclaimed through the company CIS process.

The director may still need a personal return for salary, dividends or other income, but the company's CIS deduction is not the director's personal tax credit.

Non-resident landlords and tax withheld from rent

Under the Non-resident Landlords Scheme, a letting agent or tenant may deduct basic rate tax from UK rental income paid to a landlord whose usual place of abode is outside the UK.

The deduction does not normally settle the landlord's final tax liability.

The scheme's deduction basis differs from the calculation of taxable rental profit. The landlord's final position may depend on:

Gross rental income
Allowable property expenses
Residential finance cost relief
The property allowance, where available
The landlord's UK Personal Allowance entitlement
Other UK income
Tax rates and bands
Property losses

The landlord normally reports the income and expenses on a UK Self Assessment return, claims credit for tax deducted and pays any balance or claims any repayment.

Example: tax withheld exceeds the final liability

Marta lives abroad and receives £18,000 of UK rent. Her letting agent deducts £3,600 under the Non-resident Landlords Scheme.

After allowable expenses, her taxable rental profit is £11,000. Depending on her eligibility for a UK Personal Allowance and her other income, the final UK liability may be lower than £3,600.

The tax withheld is not automatically refunded. The return is used to calculate the liability and claim the credit.

Approval to receive rent gross

A non-resident landlord can apply for approval to receive rent without deduction. Approval does not make the rental income tax-free. It changes the cash collection method.

The landlord must still calculate and report the taxable property profit through Self Assessment where required.

Foreign income taxed overseas

Foreign tax deducted does not normally remove a UK resident's obligation to report foreign income.

UK residents usually need to consider Self Assessment for:

Foreign rental income
Overseas dividends
Foreign savings interest
Foreign pensions
Overseas employment income
Foreign business income
Capital gains on overseas assets

The return generally includes the income before foreign tax, with a separate claim for Foreign Tax Credit Relief where available.

Relief is not automatically equal to the full foreign deduction. It can be limited by:

The relevant double taxation agreement
The amount of foreign tax properly payable
The UK tax attributable to the same income
Residence and source rules
Whether another form of relief is more appropriate

Foreign tax cannot usually create a repayment of more than the UK tax on the doubly taxed income.

Example: foreign tax deducted at a higher rate

Daniel receives foreign dividend income equivalent to £10,000 after £2,500 of overseas tax has been withheld. The gross income is £12,500.

He should not simply report the £10,000 net receipt. The UK calculation may require the £12,500 gross amount and a separate foreign tax credit claim.

If the UK tax attributable to that income is only £1,500, the credit may be limited to £1,500 even though £2,500 was deducted abroad. The remaining amount may need to be reclaimed from the foreign authority, depending on the treaty and local rules.

Since 6 April 2025, the UK's foreign income and gains regime has changed substantially. Anyone relying on historic remittance basis assumptions should obtain advice based on the current rules.

Pension income and pension withdrawals

Private and occupational pension income is often taxed through PAYE. The pension provider uses a tax code supplied by HMRC or, in some cases, an emergency code.

Tax can be incorrect where:

A person takes their first flexible pension withdrawal
An emergency month 1 code is used
The provider does not know about other pensions or employment
A large one-off withdrawal is treated as if it will recur every month
The State Pension uses part of the Personal Allowance but is paid without tax deducted directly
Several providers use overlapping allowances

A pension withdrawal taxed at source does not automatically require Self Assessment. A refund may be available through a specific HMRC repayment form, an adjusted tax code or year-end PAYE reconciliation.

However, if the person is already in Self Assessment or has another filing reason, pension income and tax deducted should be included in the return.

Separate reporting can also be required for pension annual allowance charges, even where a pension scheme pays some or all of the charge under scheme pays.

Savings income where tax has been deducted

Most UK bank and building society interest is now paid gross, and the institution reports the interest to HMRC. HMRC may collect any tax due through PAYE or issue a calculation.

Tax can still be deducted from certain savings, investment, annual or overseas payments.

If you already complete Self Assessment, report the relevant gross interest and tax deducted. If you do not need Self Assessment, another repayment or reporting route may be available, such as form R40 in appropriate cases.

The Personal Savings Allowance does not remove all reporting considerations. For 2025/26 it was:

£1,000 for a basic rate taxpayer
£500 for a higher rate taxpayer
Nil for an additional rate taxpayer

The rate band depends on total taxable income, not only the amount of interest.

Dividends are normally paid without tax deducted

UK dividends are generally paid gross. A dividend voucher does not show Income Tax deducted in the way a payslip or CIS statement does.

Company directors sometimes mistake Corporation Tax paid by the company for tax deducted from their dividends. These are separate liabilities.

The company pays Corporation Tax on its profits. The shareholder may then pay personal Income Tax on dividends received.

For 2025/26, the dividend allowance was £500. Dividends within the allowance are taxed at 0%, but they still form part of total income and can affect tax bands and allowances.

If you already file Self Assessment, include all dividend income. If you do not normally file, HMRC's reporting route depends on the amount and whether tax is due. Dividend income above £10,000 requires a tax return under current HMRC guidance.

Do not enter company Corporation Tax, dividend tax paid by another shareholder or PAYE deducted from salary as tax deducted from dividends.

Trust and estate income with a tax credit

Some trust and estate income is accompanied by a tax credit or confirmation that tax has been paid.

The beneficiary may receive form R185 showing:

The type of income
The gross or taxable amount
Tax treated as paid
The net amount distributed

The reporting treatment depends on the type of trust, the beneficiary's entitlement and the nature of the income.

For example, a beneficiary of an interest in possession trust may need to report the trust income on Self Assessment and receive credit for tax paid by the trustees. A bare trust beneficiary is generally taxable on the underlying income as though it belongs directly to them.

Do not report only the cash received. Use the formal income statement and confirm whether the amount shown is net or gross.

If a return is not otherwise required, a tax repayment may sometimes be claimed through another route. Trust reporting can be complex, particularly where the income was mandated directly to a beneficiary or where earlier returns used the wrong trust classification.

Capital Gains Tax already paid through the UK property service

A person who disposes of UK residential property and has Capital Gains Tax to pay may need to report and pay within 60 days of completion.

Paying through the UK property reporting service does not always complete the annual position.

If a Self Assessment return is required, the disposal may also need to be reported on that return. The tax already paid is then credited in the final calculation.

The annual calculation can change because it considers:

Total taxable income
Other gains and losses
The annual exempt amount
Capital losses brought forward
Reliefs
The final applicable Capital Gains Tax rate

The amount paid within 60 days may be an estimate based on information available at the time. The return reconciles it with the completed annual position.

High Income Child Benefit Charge paid through PAYE

For 2025/26, the High Income Child Benefit Charge can apply where the higher-income partner has adjusted net income over £60,000 and Child Benefit was received.

The charge can now be paid through PAYE if the conditions are met and the individual does not need a tax return for another reason.

If the PAYE service is used correctly, Self Assessment may not be required solely for the charge.

Self Assessment is still required where:

The person has another filing reason
The PAYE option is not available
The deadline for using PAYE has passed
HMRC has issued a notice to file that has not been withdrawn

For the 2025/26 charge, HMRC says the PAYE route must generally be used on or before 31 January 2027. After that, the charge must be dealt with through Self Assessment.

Tax deducted does not cover every type of liability

Income Tax deducted at source may not cover other amounts calculated through Self Assessment.

These can include:

Class 4 National Insurance on self-employment profits
Student loan repayments for a self-employed borrower
Postgraduate loan repayments
Capital Gains Tax
High Income Child Benefit Charge
Pension annual allowance charges
Tax on income not included in the payer's calculation

For example, a CIS subcontractor may have enough deductions to cover Income Tax but still have Class 4 National Insurance or student loan repayments due.

This is why comparing CIS deducted only with estimated Income Tax can overstate the expected refund.

How tax deducted affects payments on account

Payments on account are advance payments towards the following year's Self Assessment liability. They are normally due on 31 January and 31 July.

They are generally not required if either:

The relevant previous-year liability was less than £1,000
More than 80% of the tax was paid outside Self Assessment, including tax deducted at source

Tax deducted can therefore reduce or remove payments on account, even where a return is still required.

Example: PAYE covers most of the total liability

Sophie has employment income taxed through PAYE and a modest amount of freelance profit. Her total Income Tax and Class 4 National Insurance liability is £14,000, of which £12,000 was collected through PAYE.

More than 80% of the overall Income Tax position has been dealt with outside Self Assessment. Depending on the detailed calculation, payments on account may not be required even though Sophie has a balancing amount to pay and must file a return.

Example: CIS deductions and next year's payments

Marcus has a Self Assessment liability before CIS credit of £9,000 and valid CIS deductions of £7,500. The final balance is £1,500.

The return must calculate whether payments on account arise under the statutory rules. The existence of CIS deductions can materially affect the result, but the software entries must be correct.

Do not manually remove payments on account merely because deductions were made. Review the calculation and the amount of tax treated as deducted at source.

If next year's liability is genuinely expected to be lower, a claim to reduce payments on account may be appropriate. An excessive reduction can create interest if the final liability is higher.

Can tax already deducted produce a refund?

Yes.

A refund may arise where:

PAYE used an emergency or incorrect tax code
CIS deductions exceed the final business liability
Non-resident landlord deductions exceed the final property liability
Foreign tax credit reduces the UK amount due, subject to limits
Payments on account exceed the final bill
A pension provider deducted too much from a withdrawal
Allowable expenses or reliefs reduce taxable income
A loss claim reduces an earlier or current liability
Trust tax credits exceed the beneficiary's liability

The correct repayment route depends on the source and whether the person is already within Self Assessment.

If a Self Assessment return is required, the repayment is normally calculated through the return. HMRC may set the repayment against:

Other tax debts
A payment on account due soon
Amounts under enquiry or verification
Other liabilities held on the taxpayer's record

A return showing a repayment is not the same as an immediately approved refund. HMRC can carry out security, identity or evidence checks.

When a P800 or Simple Assessment may be enough

An employee or pensioner who is not in Self Assessment may receive a P800 after HMRC reconciles the PAYE record.

A P800 may show:

A refund due
An underpayment
The employments and pensions used
Tax deducted
Adjustments and allowances

A Simple Assessment may be issued where tax is due but cannot be collected automatically, including some cases involving State Pension or an amount above the PAYE collection limit.

Check the calculation carefully. HMRC data can be incomplete or duplicated.

Review:

Employment and pension figures
Benefits
Tax deducted
Bank interest
Allowances
Earlier refunds
Income that does not belong to you

If the calculation is wrong, contact HMRC within the relevant time limit. Do not file an unnecessary Self Assessment return simply as a substitute for correcting a PAYE reconciliation, unless a separate filing requirement exists.

Claims that can require or use Self Assessment

Tax may have been deducted correctly from income, but Self Assessment can still be needed to make certain claims or report charges.

Examples include:

Employment expense claims over £2,500 for a tax year
Additional pension tax relief not dealt with through PAYE
Certain Gift Aid adjustments
Trading loss claims
Capital loss claims
Venture capital scheme reliefs
Foreign Tax Credit Relief
Pension annual allowance charges

Not every claim requires a tax return. HMRC provides separate routes for some employment expenses, pension relief and repayments.

For example, employment expense claims of £2,500 or less may be made using HMRC's expense claim service where the conditions are met. Claims above £2,500 generally require Self Assessment.

If you already file a return, claims that belong on the return should normally be included there rather than submitted through a separate PAYE route.

Eight practical scenarios

Scenario 1: employee with one job and correct PAYE

Alex earned £42,000 from one employment. PAYE was operated correctly. Alex had no other income, gains, charges or claims, and HMRC did not issue a notice to file.

Alex would not normally need Self Assessment merely to repeat the P60 figures.

Scenario 2: employee with PAYE and self-employment

Bianca earned £38,000 through PAYE and received £12,000 from freelance work before expenses.

PAYE dealt with her salary only. Her gross trading income exceeded £1,000, so she must report the self-employment. The return will also include her employment income and PAYE deducted.

Scenario 3: verified CIS subcontractor

Connor had £9,000 deducted under CIS. He still needs to report gross turnover and business expenses. The £9,000 is credited against the final calculation.

It may produce a refund, but it does not remove the filing obligation.

Scenario 4: high-paid employee with no other issue

Divya earned £190,000, all taxed through PAYE, and had no other income, gains, charge or claim requiring a return.

The PAYE-only income threshold has been removed, so the salary level alone does not require Self Assessment. Divya should still check that the Personal Allowance withdrawal and tax code were correct.

Scenario 5: non-resident landlord

Ethan's agent deducted tax from his UK rent under the Non-resident Landlords Scheme.

He still needs to calculate the taxable rental profit and claim the deduction on the UK return. The amount withheld is unlikely to equal the final liability exactly.

Scenario 6: foreign income with withholding tax

Farah received overseas interest after foreign tax was deducted.

As a UK resident, she may need to report the gross foreign income and claim Foreign Tax Credit Relief. The foreign deduction does not automatically remove the UK obligation.

Scenario 7: pension withdrawal taxed on an emergency code

George withdrew a large amount from a pension and the provider applied an emergency tax code.

He may be able to claim a refund through a pension repayment form or year-end reconciliation. Self Assessment is not automatically required solely because too much tax was deducted, but any existing filing obligation must still be met.

Scenario 8: HMRC notice with a repayment expected

Hannah has a notice to file and expects a CIS refund.

She must file the return. The expected refund does not cancel the notice, and failing to file can trigger penalties even though HMRC may owe her money after the calculation.

A step-by-step review

Step 1: identify every source of income and gains

Review the full tax year from 6 April 2025 to 5 April 2026.

Include:

Employment
Pensions
Self-employment
Partnership income
Property income
Savings and dividends
Foreign income
Trust and estate income
Capital gains
Other taxable receipts

Step 2: identify every tax deduction or payment

Gather evidence for:

PAYE deducted
CIS deductions
Non-resident landlord tax
Foreign tax
Tax credits on trust income
Capital Gains Tax already paid
Payments on account
Direct payments to HMRC
Refunds already received

Step 3: separate gross income from tax deducted

Record the income before tax and the deduction separately. Do not treat the net bank receipt as gross income.

Step 4: check whether a filing rule applies

Use HMRC's 2025/26 checker and consider whether HMRC has issued a notice to file.

Step 5: calculate the final liability

Bring together income, gains, expenses, allowances, reliefs, National Insurance and other charges.

Step 6: set off valid tax credits

Claim only amounts supported by official records and allocated to the correct taxpayer and tax year.

Step 7: review the result

Confirm whether there is:

A balance payable
A repayment
A payment on account
A credit to carry forward
A discrepancy requiring investigation

Step 8: file or use the correct alternative route

The correct route could be:

Self Assessment
PAYE reconciliation
P800 correction
Simple Assessment
CIS company repayment process
Pension tax repayment form
R40 repayment claim
Non-resident repayment claim

Do not choose Self Assessment merely because it is familiar. Use the route required by the facts.

Records to obtain before filing

The following records may be needed:

P60 for each employment or pension
P45 for employment ending during the year
P11D or payrolled benefit information
Final payslips
CIS payment and deduction statements
Sales invoices and bookkeeping records
Bank statements
Property income and expense records
NRL6 certificates or non-resident landlord deduction evidence
Foreign income statements
Proof of foreign tax paid
Dividend vouchers
Savings interest certificates
Pension withdrawal statements
R185 trust or estate statements
Capital Gains Tax property return confirmation
Payment-on-account statements
Pension contribution certificates
Gift Aid records
Student loan plan details
HMRC notices and calculations

Do not rely only on the amount shown in the Personal Tax Account. Compare it with the documents and the actual income received.

Common errors to avoid

Reporting net income instead of gross income

If £8,000 CIS tax was deducted from £40,000 turnover, report £40,000 turnover and £8,000 tax deducted. Reporting the £32,000 bank receipt understates sales.

Treating tax deducted as an expense

PAYE, CIS and withholding taxes are generally credits or payments, not business expenses.

Claiming a company deduction personally

A limited company's CIS deductions belong to the company. They do not belong on the director's personal return.

Assuming Corporation Tax covers dividends

Corporation Tax paid by a company is not tax deducted from a shareholder's dividend.

Using the wrong tax year

Match every P60, CIS statement, foreign tax certificate and payment to the correct period from 6 April to 5 April.

Omitting PAYE income from the return

If a return is required, employment income is not excluded just because it was taxed through payroll.

Claiming tax without evidence

HMRC can delay or amend refunds where the deduction does not match employer, contractor or payer records.

Ignoring benefits and untaxed income

A P60 does not include every possible taxable amount. Review P11D benefits, rental income, dividends, interest and foreign income.

Assuming a refund means no return is required

A repayment position does not remove a notice to file or another statutory filing requirement.

Filing unnecessarily

An employee whose affairs are fully dealt with through PAYE may only need a P800 correction or repayment claim. Entering Self Assessment without a filing reason can create continuing annual obligations until HMRC is told they have ended.

What are the relevant 2025/26 deadlines?

For the tax year from 6 April 2025 to 5 April 2026:

New taxpayers who need a return should normally notify HMRC by 5 October 2026
Paper returns are normally due by 31 October 2026
Online returns are normally due by 31 January 2027
The balancing payment is normally due by 31 January 2027
The first payment on account for 2026/27 may also be due by 31 January 2027
The second payment on account may be due by 31 July 2027

If you register after 5 October 2026, HMRC may give a filing deadline three months from its letter or email. The 31 January 2027 payment deadline can still apply.

What if too little tax was deducted?

Do not wait for HMRC to discover the difference if you know a return or disclosure is required.

Take these steps:

Confirm the income and tax deducted.
Identify why the deduction was insufficient.
Check whether Self Assessment, PAYE coding or another route applies.
Register by 5 October where required.
Estimate the liability early.
File before the deadline.
Pay by 31 January or contact HMRC if payment will be difficult.

An underpayment does not necessarily mean the payer made an error. PAYE and withholding systems cannot always account for a person's complete position.

What if too much tax was deducted?

First identify the correct repayment route.

If you are already required to file Self Assessment, include the income and supported tax credit on the return.

If you are not required to file, consider whether the appropriate route is:

A P800 refund
A pension tax repayment form
Form R40
A PAYE expense claim
A CIS company refund
A non-resident repayment claim
Another HMRC service

Check that HMRC has your correct bank and contact details. Be alert to refund scams. HMRC will not ask you to disclose banking passwords or transfer a refund fee to an unknown account.

Frequently asked questions

If PAYE was deducted, do I have to file Self Assessment?

Not necessarily. If all your income was taxed correctly through PAYE, you have no other filing reason and HMRC has not issued a notice to file, a return may not be required.

I earn more than £150,000 through PAYE. Must I file?

Not solely because of the salary level. HMRC removed the PAYE-only income threshold from 2024/25. You may still need a return because of other income, gains, charges, claims or an HMRC notice.

I am a CIS subcontractor and 20% has been deducted. Do I still file?

Normally, yes, where you are a sole trader or partner required to report the business. CIS is an advance payment, not the final calculation. Report gross income, expenses and supported CIS deductions.

What if CIS was deducted at 30%?

The deduction can still be claimed if it is valid and supported, but investigate why the higher rate was used. You may need to register for CIS or correct the details used for verification.

Can I claim CIS deductions from bank statements alone?

Bank statements show net receipts but may not prove the gross payment and deduction. Obtain monthly payment and deduction statements from each contractor and reconcile them to the accounts.

Do I include my salary if it has already been taxed?

Yes, if you are filing a return. Enter the gross taxable pay and PAYE deducted from the relevant employment documents.

Does tax taken from rent settle a non-resident landlord's liability?

Usually not. The deduction is set against the final liability on the UK return. The landlord may owe more or be entitled to a repayment.

Do I report foreign income if overseas tax was deducted?

Usually, yes, if you are UK resident and the income is reportable. Enter the gross income and claim Foreign Tax Credit Relief where eligible.

Can I claim all foreign tax deducted against UK tax?

Not always. The credit can be limited by the treaty, the amount properly payable overseas and the UK tax attributable to the same income.

Does tax deducted from a pension mean no return is needed?

Not automatically. Many pensioners are dealt with fully through PAYE, but a return may be needed because of other income, a specific charge or an existing notice to file.

What happens if the pension provider used an emergency tax code?

Too much tax may have been deducted. Depending on the circumstances, a refund may be claimed during the year using an HMRC pension repayment process or reconciled later.

Can I use Self Assessment to claim any tax refund?

Only where you are required or entitled to file through Self Assessment. HMRC provides separate refund routes for many PAYE, pension, savings and non-resident cases.

If my return shows no tax due, can I ignore it?

No. If HMRC has issued a notice to file, submit the return or obtain formal withdrawal of the notice. A nil liability does not prevent late-filing penalties.

Does PAYE cover rental income?

Only if HMRC has specifically adjusted the tax code to collect an estimated property liability. Even then, check whether the amount and reporting route are correct. Larger or more complex rental income may require Self Assessment.

Are payments on account tax already paid?

Yes. They are advance payments credited against the final Self Assessment liability for the relevant year. Include them when checking what remains payable, but do not enter them as tax deducted from a particular income source.

Why has HMRC reduced my refund?

HMRC may set a repayment against another tax debt, a payment on account due soon or another liability. It may also amend unsupported tax credits after checking payer records.

Can tax deducted lead to a payment on account as well?

Yes, depending on the proportion of the total liability collected outside Self Assessment. Payments on account are generally not required where more than 80% was deducted at source or the relevant liability was below £1,000.

My Personal Tax Account shows different PAYE figures from my P60. What should I use?

Investigate before filing. Check for multiple employments, amended payroll submissions, benefits, refunds or duplicated records. Do not select whichever figure produces the lower bill without evidence.

Can an accountant verify tax already deducted?

An accountant can reconcile P60s, CIS statements, HMRC records, foreign tax certificates and other documents. However, the taxpayer must provide complete information and authorise access where required.

A final decision checklist

Before deciding that tax deducted means no return is needed, confirm:

I have reviewed every income source for 2025/26.
I know whether HMRC has issued a notice to file.
I have separated gross income from tax deducted.
I have checked self-employment turnover before expenses.
I have reviewed property, foreign, trust and investment income.
I have considered capital gains.
I have checked the High Income Child Benefit Charge.
I have identified National Insurance and student loan liabilities.
I have evidence for every tax credit being claimed.
I have reconciled CIS statements to contractor payments.
I have checked PAYE figures against P60s and P45s.
I have considered whether a P800 or another repayment route is more appropriate.
I have reviewed payments on account separately from tax deducted at source.
I know the registration, filing and payment deadlines.

If any of these points is unclear, calculate the complete position before deciding not to file.

Speak to PR Accountants Ltd

PR Accountants Ltd helps employees, company directors, landlords, construction subcontractors and individuals with more complex income determine whether Self Assessment is required and whether tax already deducted has been credited correctly.

Our services include:

Self Assessment registration and reactivation
Personal tax return preparation
PAYE and P60 reconciliation
CIS accounts and deduction reviews
CIS repayment claims for sole traders
Limited company CIS support
Landlord accounts and non-resident landlord returns
Foreign income and Foreign Tax Credit Relief calculations
Capital Gains Tax reporting
High Income Child Benefit Charge reviews
Pension and employment relief claims
Tax repayment checks
Payments-on-account reviews
Tax forecasts and payment planning
Corrections to earlier tax returns

If tax has been deducted but you are unsure whether a return is still required, we can review the full position before the filing deadline. The review may identify further tax to pay, a refund due or a simpler reporting route that avoids an unnecessary return.

PR Accountants Ltd
Email: info@praccounting.co.uk
Landline: 0330 043 0792
WhatsApp: 07946 617369
Website: www.praccounting.co.uk

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Official guidance

This article provides general information based on tax rules and HMRC guidance available at the date of publication. It does not constitute personalised tax, accounting, legal or financial advice. Filing requirements, credits and reliefs depend on the taxpayer's complete circumstances. Tax rules and HMRC processes can change, so professional advice should be obtained where necessary.