Reporting residential property gains

Owners of investment properties and second homes may decide to sell up for a variety of reasons. They may wish to take advantage of a more buoyant market as buyers rush to beat the reduction in the residential SDLT threshold, or they might simply be looking to release equity for retirement or other projects. Whatever the motivation, one thing is certain: the tax implications of selling a property can be substantial, and planning ahead is essential to avoid an unwelcome bill from HMRC.

Capital Gains Tax (CGT) is the main consideration when selling an investment property. Unlike your main residence, which benefits from principal private residence relief, investment properties and second homes are subject to CGT on any profit made between purchase and sale. For the 2024/25 tax year, the annual CGT exemption is £3,000 — meaning gains up to this threshold are tax-free. Beyond that, higher rate taxpayers pay 20% on residential property gains, whilst basic rate taxpayers pay 10%.

This might seem straightforward, but the calculation itself requires careful attention to detail.

Calculating your chargeable gain

The gain is essentially the difference between what you paid for the property (including acquisition costs such as legal fees and survey costs) and the sale proceeds (minus selling costs like agent fees and conveyancing fees). You can also deduct the cost of any capital improvements you’ve made — though maintenance and repairs do not count.

Many people overlook the importance of proper documentation here. HMRC expects you to evidence your purchase price, costs, and improvements with original receipts and records. If you bought the property many years ago, tracking these down can be challenging, but it’s worth the effort. A missing receipt might mean you can’t claim a legitimate cost, inflating your taxable gain unnecessarily.

Timing matters: consider the tax year

If you’re planning to sell, the timing of completion can affect which tax year the gain falls into. Gains are assessed in the tax year in which the property completes, not when you exchange contracts. If you’re close to the 5 April year-end and expect a large gain, completing after that date might spread the gain across two tax years, allowing you to use two annual exemptions instead of one. In 2024/25, this could save you £300 in tax (20% of £3,000).

This strategy only works if your circumstances allow — and you should never let the tax tail wag the property dog — but it’s worth exploring with your accountant.

Impact on your income tax position

Here’s something many people don’t consider: a large capital gain can push you into a higher income tax band, especially if you’ve had a particularly profitable year from employment or business income. A basic rate taxpayer with a gain of £10,000 might find themselves paying the higher rate on some of it.

There’s also the matter of property income. If you’ve been receiving rental income from the property, you’ll need to declare that separately on your Self Assessment tax return. Recent changes to the tax treatment of furnished holiday lets have made this area particularly nuanced. If your property qualifies as a furnished holiday let, the tax treatment differs significantly from standard buy-to-let properties.

Don’t forget about Stamp Duty Land Tax (SDLT)

Whilst SDLT applies to buyers rather than sellers, it’s worth remembering that SDLT changes do affect the property market. The recent reduction in the residential SDLT threshold means more buyers will face higher SDLT bills, which can dampen demand. This may influence your pricing strategy and your timeline for selling.

Getting ahead of the curve

The best approach is to start thinking about tax well before you list the property. Calculate your likely gain, check whether you have adequate records, and consider whether any timing strategies might apply to your situation. This preparation means no nasty surprises when you complete the sale and need to file your Self Assessment return.

Your accountant can help you navigate each of these points and ensure you’re not paying more tax than necessary. We see many sellers who could have minimised their tax burden significantly with just a little planning beforehand.

For tailored advice, contact Severn Accounting — we’re here to help.