Capital Gains Tax on property in the UK:

Written By Jonathan Reeves

Rules many owners misunderstand

Selling property can have significant tax implications. While many people are aware that Capital Gains Tax (CGT) may apply, the rules are often misunderstood.

This is particularly the case where the property is not a main residence, where part of the land is sold, or where the property has been inherited.

Understanding how Capital Gains Tax applies to property disposals can help avoid unexpected tax liabilities and ensure that reporting obligations are met.

When Capital Gains Tax applies to property

Capital Gains Tax may arise when a property is sold for more than its original acquisition value.

This commonly applies where:

  • a second home is sold

  • a rental property is disposed of

  • land or part of a garden is sold

  • inherited property is sold at a higher value than at the date of death

The gain is generally calculated as the difference between the acquisition value and the sale proceeds, subject to certain allowable deductions.

Main residence relief

Where a property has been used as a main residence, relief from Capital Gains Tax may be available.

This is often referred to as Principal Private Residence (PPR) relief.

In straightforward cases where a property has been the individual’s only or main home throughout ownership, no Capital Gains Tax will usually arise on disposal.

However, complications can arise where:

  • the property has been let out

  • the owner has had more than one residence

  • part of the property has been used for business purposes

  • the grounds exceed the permitted area

These situations can affect the amount of relief available.

Capital Gains Tax on second homes and rental properties

Where a property has not been the owner’s main residence, Capital Gains Tax will generally apply to any gain.

This commonly affects:

  • buy-to-let properties

  • second homes

  • inherited properties that are not occupied as a main residence

In these cases, the gain is calculated by comparing the purchase price (or probate value, if inherited) with the eventual sale price.

Allowable costs such as legal fees and certain improvement costs may reduce the taxable gain.

Selling inherited property

When a property is inherited, it is usually treated as being acquired at its market value at the date of death.

If the property is later sold for more than this value, a capital gain may arise.

For example:

  • value at date of death: £350,000

  • sale price: £380,000

In this case, the gain may be £30,000.

This is a common situation for executors and beneficiaries, particularly where property values increase during the administration period.

Selling part of a garden or land

Capital Gains Tax can also arise where part of a property is sold, such as:

  • part of a garden

  • land with development potential

  • a separate plot carved out from a larger property

In some cases, Principal Private Residence relief may still apply, but this will depend on factors such as:

  • the size of the land

  • how it has been used

  • whether it forms part of the main residence

This is an area where the tax position is often misunderstood.

The 60-day reporting rules

Where a taxable gain arises on the disposal of UK residential property, the gain may need to be reported to HMRC within 60 days of completion.

This reporting requirement applies in addition to any reporting through the Self Assessment system.

Failing to meet the 60-day deadline can result in penalties and interest.

Understanding whether the reporting rule applies is an important part of the disposal process.

Allowable costs and reliefs

When calculating a capital gain, certain costs may be deducted.

These can include:

  • legal fees on purchase and sale

  • estate agent fees

  • stamp duty paid on acquisition

  • certain improvement costs

Reliefs may also be available in some circumstances, depending on how the property has been used.

Ensuring that all allowable costs and reliefs are considered can reduce the overall tax liability.

When property transactions become trading

In some situations, what appears to be a capital disposal may instead be treated as a trading activity.

This can arise where:

  • land is acquired with the intention of development

  • property is developed and sold

  • transactions are carried out on a more commercial basis

In these cases, profits may be subject to income tax rather than Capital Gains Tax, which can significantly affect the tax position.

Common misunderstandings

Property transactions are one of the areas where tax is most frequently misunderstood.

Some common issues include:

  • assuming no tax applies to inherited property

  • misunderstanding how PPR relief works

  • overlooking the 60-day reporting requirement

  • failing to consider whether a transaction is capital or trading

Understanding these issues can help avoid unexpected outcomes.

When professional advice may help

Property transactions often involve significant values, and the tax position can vary depending on the circumstances.

Advice may be helpful where:

  • a property has been used for more than one purpose

  • land or part of a property is being sold

  • the property has been inherited

  • development is being considered

Obtaining advice early can help ensure that the tax position is understood before the transaction is completed.

How we can help

We regularly advise individuals, executors and trustees on Capital Gains Tax issues relating to property.

This may include:

  • reviewing the tax position before a property is sold

  • calculating capital gains and reliefs

  • advising on reporting obligations

  • dealing with HMRC correspondence

If you are considering selling property and would like guidance on the tax implications, we would be happy to discuss your situation.

Jonathan Reeves
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