Capital Gains Tax in the UK: A 2026 Guide for Investors and Property Owners

For a levy that affects millions of Britons each year, Capital Gains Tax remains one of the most misunderstood items on HMRC's books. Ask a room of landlords, share investors, and second-home owners whether they understand their CGT obligations and most will hesitate. That hesitation is costly — the taxman collected a record £14.4 billion in CGT receipts in 2022/23, and with the annual exempt amount slashed repeatedly since then, the bill for ordinary investors has never been higher.

Whether you sold shares during a volatile market, disposed of a rental flat, or simply gifted assets to a family member, understanding how CGT works in 2026 is no longer optional. This guide explains the current rules, the rates that now apply following the October 2024 Budget, and the planning strategies that can legally reduce what you hand over to HMRC.

What Is Capital Gains Tax and Who Pays It?

Capital Gains Tax is charged on the profit — the "gain" — you make when you sell or otherwise dispose of an asset that has increased in value. The tax is not charged on the total sale proceeds but only on the uplift from your original purchase price, adjusted for any allowable costs such as solicitors' fees, stamp duty, and improvement works.

The range of assets caught by CGT is broad. It includes shares and investment funds held outside an ISA or pension, residential and commercial property that is not your main home, business assets, and personal possessions worth more than £6,000 — a threshold known as the chattel exemption. Gifting an asset, transferring it as part of a divorce settlement, or receiving compensation for its loss can all trigger a disposal for CGT purposes.

Not every individual pays CGT in any given year. You must first exceed your annual exempt amount — the slice of gains that falls outside the charge entirely. However, the government has reduced this allowance dramatically. It stood at £12,300 as recently as 2022/23, was cut to £6,000 in 2023/24, and then slashed again to £3,000 for 2024/25 and beyond. For investors who once relied on that buffer to shelter modest gains, the impact has been severe.

CGT Rates After the October 2024 Budget

The Autumn 2024 Budget brought the most significant overhaul to CGT rates in over a decade. Chancellor Rachel Reeves aligned the main rates for non-property assets more closely with Income Tax, while making targeted changes to residential property.

For assets other than residential property — including shares, funds, and most business assets — the lower rate rose from 10% to 18%, and the higher rate rose from 20% to 24%. These apply to basic-rate and higher or additional-rate taxpayers respectively, based on whether your total taxable income plus your gains fall within the basic-rate band.

For residential property disposals, the rates were adjusted slightly. The lower rate dropped from 18% to 18% (unchanged), while the higher rate fell from 28% to 24%, bringing it in line with the main higher rate. The 28% rate that previously applied to residential property for higher-rate taxpayers has therefore been abolished, offering modest relief to landlords selling up.

Business Asset Disposal Relief — formerly Entrepreneurs' Relief — continues to offer a reduced 10% rate on qualifying business gains up to a lifetime limit, though the Budget reduced that limit from £1 million to £1 million (unchanged) while increasing the rate to 14% from April 2025 and 18% from April 2026. If you are planning to sell a business, timing is therefore material.

Residential Property: The 60-Day Reporting Rule

Landlords and second-home owners face an additional administrative burden that catches many by surprise. Since April 2020, any UK resident who makes a gain on the disposal of UK residential property must report that gain and pay the CGT due within 60 days of completion — not at the end of the tax year via Self Assessment.

The 60-day window is tight, particularly when solicitors are still exchanging paperwork. Failure to report in time triggers automatic late-filing penalties starting at £100, with further daily and percentage-based charges accumulating quickly. HMRC can also charge interest on late payments.

It is worth noting that Private Residence Relief still shelters gains on a principal private residence for most homeowners. If a property has been your sole or main home throughout your entire period of ownership, no CGT arises on sale. Where you have periods of absence, have let the property, or own more than one home, the calculation becomes more nuanced and professional advice is recommended.

How to Reduce Your CGT Bill Legally

Informed planning can make a considerable difference to your final tax liability. Several well-established strategies are entirely lawful and widely used.

Use your ISA allowance. Gains made within an Individual Savings Account are completely free of CGT. Moving investments into an ISA — known as "bed and ISA" — can shelter future growth, though the disposal to fund the ISA purchase is itself a chargeable event if the asset has already appreciated.

Transfer assets to a spouse or civil partner. Transfers between spouses and civil partners living together take place at no gain and no loss for CGT purposes. This effectively doubles the household's annual exempt amount and can shift gains to a lower-rate taxpayer, reducing the overall bill.

Time your disposals carefully. If you expect gains in a tax year that will be close to the basic-rate band threshold, deferring part of a disposal into the following April could push gains into a lower rate. Similarly, crystallising losses before the end of the tax year allows them to be set against gains made in the same year.

Consider pension contributions. Increasing pension contributions reduces your adjusted net income, which can in turn lower the amount of your gains that fall into the higher-rate band. The interaction between income, pension relief, and CGT rates is complex, but the potential saving can be substantial for those near the threshold.

For investors comparing products and platforms to hold their assets tax-efficiently, tools like QuidCompare — an independent UK financial comparison service — can help identify ISA and investment account options suited to your circumstances.

Report losses proactively. Even in years where you have no gains, reporting capital losses to HMRC preserves them for use in future tax years. Losses not claimed within four years of the end of the tax year in which they arose are lost permanently.

Looking Ahead

CGT has moved firmly into the spotlight in recent years, driven by fiscal pressure, a shrinking exempt amount, and a larger population of asset holders exposed to the charge. With the allowance now at just £3,000, even relatively modest investment portfolios can generate a tax event on disposal.

The rules are neither simple nor static, and for anything beyond the most straightforward disposal — particularly involving property, business assets, or significant share portfolios — taking advice from a qualified tax professional is money well spent. The cost of a single planning conversation is invariably less than the tax saved by acting on it.