Sold a rental property recently? A few weeks later, an unexpected tax bill can show up — one you never budgeted for. Capital Gains Tax (CGT) has a habit of catching people off guard — not because the rules are secret, but because most people only look into them after they've already sold. There's no single trick that eliminates CGT for everyone, but there are several legitimate reliefs and planning steps that can help you avoid Capital Gains Tax in the UK — or at least reduce what you owe — depending on your circumstances.
Here's what you actually need to know before you sell.
What Is Capital Gains Tax?
CGT is charged on the profit you make when you sell an asset — not the full amount it sold for. Bought a rental property for £200,000 and sold it for £280,000? Tax only applies to that £80,000 gain, not the whole sale price.
A few things can trigger it: a second home or buy-to-let, shares and investments sitting outside an ISA, business assets, or personal possessions worth over £6,000 (your car's the one exception here). Your main home is usually safe under Private Residence Relief — which is exactly why most people only run into CGT when they're selling a second property, something they've inherited, or an investment portfolio they've built up over the years.
What You'll Actually Pay: CGT Rates for 2026/27
Here's where it gets a bit more concrete. Gains that fall within your basic-rate Income Tax band are taxed at 18%. Anything above that band jumps to 24%. And if you qualify for Business Asset Disposal Relief (BADR), you're looking at 18% instead — up to a £1 million lifetime limit.
One thing worth knowing: since October 2024, these rates apply equally across the board — property, shares, crypto, all of it. There used to be a separate, higher rate just for property, but that distinction is gone now.
Where your gain lands depends on your total taxable income for the year: fill your basic-rate band with income first, and whatever gain sits above it is taxed at the higher rate.
How to Avoid Capital Gains Tax in the UK
There isn't one trick that wipes out CGT for everyone — anyone promising that is oversimplifying. But several legitimate reliefs and strategies can bring your bill down, sometimes significantly:
Use your annual tax-free allowance. Everyone gets a £3,000 CGT allowance each year. Gains under that threshold aren't taxed at all, so timing a sale — or splitting a disposal across two tax years — can genuinely change the outcome.
Transfer assets to your spouse or civil partner. Transfers between spouses are made on a no-gain, no-loss basis and are exempt from CGT. If you're married and both allowances are unused, that effectively doubles what you can shelter.
Offset losses against gains. Lost money on another investment this year? It can reduce your taxable gain, and unused losses can often be carried forward to future years.
Claim Business Asset Disposal Relief. Selling all or part of a business you've owned for at least two years can qualify for the reduced 18% rate, rather than the standard 24%, up to a £1 million lifetime limit.
Hold assets inside an ISA or pension going forward. This shelters future growth from CGT — it doesn't retrospectively cover a gain you've already made outside the wrapper. For shares already held elsewhere, some investors use a "Bed & ISA" or "Bed & SIPP" — selling and immediately rebuying inside the wrapper — which crystallises a gain now but protects everything the asset earns from that point on.
Capital Gains Tax Allowance 2026/27
The capital gains tax allowance 2026/27 stands at just £3,000 — down from £12,300 only a few years ago. That's a huge drop, and it means far more people now fall into CGT territory than before, even on relatively modest gains. A disposal that would have been completely tax-free a few years back can easily trigger a real bill today, so it's worth checking your position before you sign anything. Each spouse or civil partner has their own separate £3,000 allowance, which is one of the reasons splitting ownership before a sale can be so effective.
Report and Pay Capital Gains Tax on UK Property
If you sell a UK residential property that isn't your main home and CGT is owed on the sale, you must report and pay it within 60 days of completion — not at the end of the tax year like most other gains.
If your gain is fully covered by reliefs, losses, or your annual allowance, a 60-day return may not be required. But you may still need to report it through Self Assessment if your total gains for the year exceed £3,000, or your total disposal proceeds exceed £12,000 (four times the annual allowance) — even when no tax is actually due.
Miss the 60-day deadline when tax is owed, and HMRC applies automatic penalties starting at £100, plus daily interest. This is one of the most common CGT mistakes we come across, mostly because people assume it follows the usual January deadline. It doesn't.
Capital Gains Tax on Inherited Property
Inheriting a property doesn't trigger CGT by itself — Inheritance Tax may apply at that point instead. Capital gains tax on inherited property only comes into the picture later, if and when you decide to sell it.
Here's the detail most people miss: your "cost" for CGT purposes isn't what the original owner paid decades ago. It's the property's market value on the date you inherited it. So if the value has gone up since then, that increase — not the full sale price — is what actually gets taxed.
If you later move into the inherited property and make it your main home, the final 9 months of ownership generally qualify for Private Residence Relief. This isn't automatic in every case, though — periods of letting, non-residence, or business use can affect how much relief actually applies, so it's worth checking your specific situation rather than assuming.
When several siblings inherit a property jointly, each person's CGT position is worked out separately. That opens up some genuine planning opportunities, particularly around when to sell and making full use of each person's £3,000 annual allowance.
Common Mistakes That Increase Your CGT Bill
Forgetting to deduct allowable costs — legal fees, estate agent fees, and capital improvement works (not routine repairs or maintenance, which don't qualify) — from the gain
Missing the 60-day property reporting deadline when tax is actually owed
Not using both spouses' £3,000 allowances before a joint sale
Selling everything in one tax year instead of spreading it across two
Assuming an inherited property automatically qualifies for the same reliefs as a main home
The Smart Move Before You Sell
CGT is almost always easier to plan for before a sale than to fix afterwards. Once the transaction's gone through, most of your options disappear with it. If you're thinking about selling property, shares, or a business asset, getting advice early is often the difference between a manageable bill and an unpleasant surprise.
At Malik AccounTax, we help individuals and business owners across Edinburgh and the UK plan ahead for Capital Gains Tax, work out exactly what's owed, and make sure every allowance and relief is properly claimed.
Email: info@malikaccountax.com
whatsapp/call: +44 7879 720675
Get in touch today for a free consultation before you sell.