Selling a property can be a significant financial milestone, whether you’re disposing of a buy-to-let investment, a holiday home, or a property that has been in the family for many years. What many taxpayers don’t realise is that HMRC may require you to report the sale and pay any Capital Gains Tax (CGT) due within just 60 days of completion.
Failing to meet the deadline can result in penalties, interest and unnecessary stress. Unfortunately, we regularly encounter clients who were unaware of the reporting requirement until after the deadline had passed.
Do I need to submit a Capital Gains Tax Return?
If you are a UK resident and make a taxable gain on the sale or transfer of a UK residential property, you will generally need to submit a UK Property Return and pay any Capital Gains Tax due within 60 days of completion.
The rules commonly affect:
- Buy-to-let properties
- Second homes and holiday homes
- Inherited properties
- Former main residences that do not qualify for full Private Residence Relief
- Gifts of property to family members
- Transfers of property into trusts or companies
Many people assume that no money changing hands means no tax reporting is required. Unfortunately, that is often not the case. Gifts and other transfers can trigger Capital Gains Tax and reporting obligations even where no sale proceeds are received.
When is a return not required?
You may not need to file a UK Property Return where:
- The property qualified for full Private Residence Relief throughout your entire period of ownership.
- The transfer was between spouses or civil partners.
- The disposal resulted in a loss.
- There is no Capital Gains Tax to pay because the gain is fully covered by reliefs.
However, the rules are far from straightforward. Even where a property was once your main home, a period of letting or absence can affect the relief available. Taking advice before completion can help avoid costly mistakes.
Non-residents: special reporting rules apply
If you are non-UK resident, the reporting requirements are even more stringent.
Non-residents disposing of UK property will often need to submit a Non-Resident Capital Gains Tax (NRCGT) Return, or the relevant UK property disposal return, within 60 days of completion. In many cases, a return is required even where:
- No tax is payable; or
- The disposal has generated a loss.
HMRC places particular emphasis on compliance in this area, so obtaining specialist advice before the transaction completes is essential.
What happens if you miss the deadline?
HMRC can charge late filing penalties and interest on any unpaid tax.
While the penalties may initially appear modest, they can escalate quickly where returns remain outstanding for several months. In many cases, the professional fees involved in correcting a late submission can exceed the cost of obtaining advice before the disposal takes place.
How Dafferns can help
Our Private Client Tax team can take the stress out of the process by:
- Calculating your capital gain and available reliefs
- Advising whether a UK Property Return or NRCGT return is required
- Estimating your Capital Gains Tax liability before completion
- Assisting with registration for HMRC’s online reporting service
- Obtaining agent authorisation
- Preparing and submitting the return on your behalf
- Advising on opportunities to reduce the tax liability where appropriate
Thinking of selling or gifting a property?
A quick conversation before contracts are exchanged can often prevent unexpected tax bills, missed deadlines and HMRC penalties.
Whether you are selling a rental property, disposing of an inherited property, gifting a property to the next generation, or are a non-resident owner of UK property, our experienced tax specialists can guide you through the reporting requirements and ensure everything is dealt with correctly and on time.
Contact our Private Client Tax team for tailored advice on your property disposal and Capital Gains Tax obligations.
Private client and personal tax 
