Selling a Rental Property: Capital Gains Tax Planning Points
Selling a rental property is not simply a question of agreeing a price and repaying the mortgage. The disposal may create a taxable capital gain, with the amount due depending on the property’s purchase history, ownership, improvement costs, previous use and the landlord’s other taxable income.
The most valuable Capital Gains Tax planning usually takes place before contracts are exchanged. Once a binding sale contract exists, many planning opportunities may no longer be available.
This guide explains the main points landlords should consider when selling a UK rental property.
This article reflects the rules applying in the 2026/27 tax year and focuses mainly on UK resident individual landlords selling UK residential property.
What is Capital Gains Tax?
Capital Gains Tax, commonly called CGT, is charged on the gain made when an asset is sold or otherwise disposed of.
For a rental property, the gain is not simply the sale price. It is broadly calculated by deducting the property’s allowable acquisition cost, qualifying improvement expenditure and selling costs from the disposal proceeds.
The basic calculation is:
Sale proceeds
Less:
- Original purchase price or other allowable acquisition value
- Allowable purchase costs
- Qualifying capital improvement expenditure
- Allowable selling costs
This produces the capital gain before deducting reliefs, capital losses and the annual exempt amount.
The mortgage balance does not reduce the capital gain
One of the most common misunderstandings is that CGT is calculated using the cash left after the mortgage has been repaid.
It is not.
The outstanding mortgage is relevant to the landlord’s cashflow, but it does not normally reduce the taxable gain. Mortgage capital repayments and mortgage interest are not allowable costs in the CGT calculation.
For example, suppose a property is sold for £300,000 and the outstanding mortgage is £130,000. The landlord may receive substantially less than £300,000 after repaying the lender, but the gain calculation still begins with the full £300,000 disposal value.
This is why landlords should calculate the potential tax liability before deciding how the net proceeds will be used.
Which costs can reduce the gain?
According to HMRC’s property disposal guidance, certain costs connected with purchasing, improving and selling a property can be deducted.
These may include:
- The original purchase price
- Stamp Duty Land Tax, Land and Buildings Transaction Tax or Land Transaction Tax
- Solicitor and conveyancing fees incurred on purchase
- Survey and valuation fees directly connected with the acquisition
- Estate agent fees on the sale
- Solicitor and conveyancing fees on the sale
- Certain advertising costs
- Qualifying capital improvement expenditure
Invoices, completion statements and supporting documents should be retained wherever possible. If a property has been owned for many years, reconstructing these costs shortly before a reporting deadline can be difficult.
Repairs and improvements are treated differently
Not every amount spent on a property can be deducted from the capital gain.
Normal repairs and maintenance are generally revenue expenses. These costs may be deductible from rental income under the property income rules, but they do not normally become CGT costs.
Examples may include:
- Repainting and decorating
- Replacing broken roof tiles
- Repairing an existing boiler
- Fixing leaks
- Replacing damaged items with modern equivalents
- General maintenance between tenancies
Capital improvements may qualify if they enhanced the property and the improvement is still reflected in the property when it is sold.
Examples might include:
- Building an extension
- Converting a loft into additional living space
- Adding an extra bathroom
- Constructing a garage
- Carrying out a substantial structural alteration
- Installing a new feature that did not previously exist
The distinction depends on the facts. A high cost does not automatically make an item a capital improvement.
There must also be no double deduction. A cost already deducted from rental income cannot normally be claimed again when calculating the capital gain.
Current Capital Gains Tax rates
For the 2026/27 tax year, individuals generally pay CGT at:
- 18% to the extent that the taxable gain falls within the unused basic rate Income Tax band
- 24% on the balance above that band
The rate cannot be determined by looking at the gain alone. The landlord’s taxable income for the same tax year must also be considered.
A landlord whose income already uses the basic rate band may pay 24% on most or all of the taxable gain. A landlord with lower income may have part of the gain taxed at 18% and the remainder at 24%.
The individual annual exempt amount for 2026/27 is £3,000. Only one exemption is available to each individual for the tax year, regardless of how many assets are sold.
The current rates and allowances can be checked in HMRC’s Capital Gains Tax rates guidance.
A simple rental property gain example
Assume a landlord has the following figures:
- Property sale price: £300,000
- Original purchase price: £180,000
- Allowable purchase costs: £7,000
- Qualifying capital improvements: £20,000
- Allowable selling costs: £6,000
The initial gain would be:
£300,000 less £180,000 less £7,000 less £20,000 less £6,000 = £87,000
If there are no other reliefs or losses, the £3,000 annual exempt amount would reduce the taxable gain to £84,000.
CGT would then be charged at 18%, 24% or a combination of the two, depending on the landlord’s taxable income and remaining basic rate band.
This example is deliberately simplified. Ownership changes, periods of residence, previous gifts, inheritance and other disposals can materially alter the calculation.
Was the property ever your main home?
If the rental property was previously the landlord’s only or main residence, Private Residence Relief may exempt part of the gain.
Qualifying periods may include:
- Periods when the owner genuinely occupied the property as their main residence
- Certain permitted periods of absence
- The final nine months of ownership, provided the property qualified as the main residence at some point
- Longer final periods in certain cases involving disability or long term residential care
Simply staying at the property briefly or using it as a correspondence address is not necessarily enough. HMRC may consider whether the occupation had the character and permanence of a genuine residence.
The gain is normally apportioned across the period of ownership. The qualifying proportion may be relieved, while the remaining proportion stays taxable.
Detailed conditions are explained in HMRC’s Private Residence Relief guidance.
Is Letting Relief still available?
Letting Relief is now much more restricted than it was in the past.
It is generally relevant only where the owner shared occupation of the property with the tenant. It is not normally available where the entire property was rented out while the owner lived elsewhere.
Landlords should not assume that living in the property before or after a tenancy automatically produces Letting Relief. Private Residence Relief and Letting Relief are separate calculations with different conditions.
Capital losses can reduce the amount payable
Allowable capital losses may be used against capital gains.
This could include losses from:
- The disposal of another property
- The sale of shares or investments
- Certain failed investments
- Other chargeable assets
Unused capital losses from earlier tax years may also be available if they were properly notified to HMRC.
Current year losses are generally set against gains arising in the same year. Carried forward losses can usually be used more selectively, subject to the relevant rules.
A capital loss must normally be claimed within four years after the end of the tax year in which the disposal occurred. Further information is available in HMRC’s guidance on capital losses.
Landlords should review their capital loss history before exchanging contracts, not after the tax has been calculated.
Jointly owned rental properties
Where a property is jointly owned, each owner calculates their own share of the gain.
Each owner may have:
- Their own annual exempt amount
- A different level of taxable income
- Different available capital losses
- Different entitlement to Private Residence Relief
- A separate 60 day reporting obligation
The beneficial ownership of the property is important. The Land Registry title alone may not always tell the full story, particularly where declarations of trust or previous ownership arrangements exist.
HMRC expects each joint owner to report their own share rather than one owner reporting the entire disposal.
Transfers between spouses and civil partners
Transfers between spouses or civil partners who are living together are usually made on a no gain, no loss basis. The receiving spouse broadly takes over the transferring spouse’s CGT cost.
A genuine transfer before a sale may sometimes allow future gains to be divided between two taxpayers. This can potentially make use of two annual exempt amounts, available capital losses and unused basic rate bands.
However, this should not be treated as an automatic tax saving. Important issues include:
- The transfer must take place before a binding sale contract
- Legal and beneficial ownership must genuinely change
- The recipient should normally be entitled to their share of the sale proceeds
- Mortgage lender approval may be required
- Stamp taxes can arise if responsibility for mortgage debt is transferred
- The transfer affects future rental income and legal ownership
- Professional legal and tax advice may be required
A last minute document that does not reflect the true ownership arrangement may not achieve the intended result.
The tax year is usually determined by exchange
For an unconditional property contract, the CGT disposal date is normally the date contracts are exchanged, not the completion date.
This can be particularly important where exchange and completion fall in different tax years.
The exchange date can affect:
- Which annual exempt amount is available
- Which capital losses can be used
- The landlord’s taxable income for the relevant year
- The applicable tax rates
- When the disposal must be included in Self Assessment
However, the 60 day property reporting deadline is calculated from completion.
This produces an important distinction:
- The tax year is normally determined by exchange
- The property reporting deadline normally runs from completion
The contract terms should be reviewed carefully where a transaction is conditional or unusually structured.
The 60 day reporting and payment deadline
A UK resident individual who has CGT to pay on the sale of UK residential property must normally report the disposal and make a payment on account within 60 days of completion.
Penalties and interest may apply if the return or payment is late.
The information required can include:
- Property address
- Date and value of acquisition
- Exchange date
- Completion date
- Disposal proceeds
- Purchase and selling costs
- Improvement expenditure
- Reliefs and losses
- Estimated taxable income for the year
Where a property is jointly owned, each owner is responsible for their own report.
If the landlord is registered for Self Assessment, the disposal must normally also be included on the relevant tax return. The payment already made through the UK property reporting service is then taken into account.
Where no CGT is payable, a UK resident will not generally need to make the 60 day property return. However, Self Assessment reporting may still be required. For example, a taxpayer already within Self Assessment may need to report disposals where total proceeds for the tax year exceed £50,000, even if the gains are covered by losses or the annual exempt amount.
HMRC explains the process in its UK property reporting guidance.
Selling an inherited rental property
When a property is inherited, there is normally no immediate CGT charge on the beneficiary.
For a later sale, the starting cost is usually the property’s market value at the date of death rather than the amount originally paid by the deceased owner.
It is important to retain:
- The probate valuation
- Estate administration records
- Evidence supporting the valuation
- Legal costs connected with the beneficiary’s acquisition where relevant
- Records of subsequent capital improvements
If the property’s value at the date of death is uncertain, professional valuation advice may be needed.
Gifts and sales below market value
Giving a rental property away does not necessarily prevent a CGT charge.
Where property is gifted or transferred to a connected person, such as an adult child, CGT may be calculated using market value even when no money changes hands.
This can leave the owner with a tax liability but no cash sale proceeds from which to pay it.
Special rules may apply to transfers between spouses and civil partners, transfers into trust and certain business assets. Advice should be obtained before signing any transfer documents.
Nonresident landlords
A nonresident owner disposing of UK property may have to report the disposal within 60 days even if:
- No tax is payable
- The disposal creates a loss
- The property is jointly owned
- The sale is already being reported elsewhere
Special rebasing or time apportionment rules may affect the gain, depending on the type of property and when it was acquired.
Nonresident reporting should therefore be considered before completion.
Properties owned through a limited company
A limited company does not pay personal CGT on the sale of its property. It normally pays Corporation Tax on the resulting chargeable gain.
The company calculation may deduct:
- The original property cost
- Qualifying acquisition costs
- Qualifying improvement expenditure
- Disposal costs
- Available company capital losses
- Indexation Allowance up to December 2017 for eligible older expenditure
A company does not receive the individual £3,000 annual exempt amount or pay the personal 18% and 24% CGT rates.
The proceeds also belong to the company. If shareholders later withdraw those funds, a separate personal tax charge may arise depending on whether the money is taken as salary, dividends, repayment of a director’s loan or through another method.
HMRC provides separate guidance for companies selling chargeable assets.
Investment activity versus property trading
CGT treatment normally applies where a property has been held as an investment.
Different rules can apply if the property was acquired with the intention of renovating and reselling it as part of a property trading activity. In that situation, the profit may be treated as trading income rather than a capital gain.
The distinction depends on the facts and intentions surrounding the purchase, ownership and sale. This should be reviewed carefully where a property was held for only a short period or developed specifically for resale.
A planning checklist before exchange
Before exchanging contracts, landlords should:
- Confirm the legal and beneficial owners.
- Locate the original purchase completion statement.
- Gather invoices for legal fees, stamp taxes and acquisition costs.
- Separate improvement expenditure from normal repairs.
- Review whether the property was ever genuinely occupied as a main residence.
- Check for available capital losses.
- Estimate taxable income for the year of disposal.
- Consider the impact of the exchange date.
- Review any proposed spouse or civil partner transfer before the sale becomes binding.
- Obtain valuations for inherited, gifted or unusually acquired property.
- Calculate the likely tax before committing the net proceeds elsewhere.
- Prepare for the 60 day reporting and payment deadline.
Capital Gains Tax planning is about more than the tax rate
A good property sale calculation should answer more than “How much CGT will I pay?”
It should also consider:
- How much cash will remain after repaying the mortgage
- Whether funds are available to pay the tax
- Whether early repayment charges apply
- How the sale affects the wider property portfolio
- Whether capital losses can be used
- Whether the owner will remain within Self Assessment
- How company sale proceeds will eventually be extracted
- Whether selling now supports the owner’s wider financial objectives
The lowest immediate tax bill is not always the best commercial outcome. The decision should be considered alongside finance costs, future rental income, maintenance requirements and the investor’s long term strategy.
Speak to PR Accountants Ltd before selling
If you are planning to sell a rental property, early advice can help you understand the likely tax cost and avoid rushed calculations after completion.
PR Accountants Ltd can assist with:
- Preparing an estimated capital gain
- Reviewing purchase and improvement records
- Identifying potential reliefs and capital losses
- Considering joint ownership and spouse transfers
- Planning for the 60 day reporting deadline
- Completing the UK property disposal report
- Reporting the sale through Self Assessment
- Calculating gains on company-owned properties
Contact us before contracts are exchanged wherever possible.
PR Accountants Ltd
Email: info@praccounting.co.uk
Telephone: 0330 043 0792
Website: www.praccounting.co.uk