Capital Gains Tax 2026: Why Landlords Can't Just Exit

Selling a buy-to-let in 2026 is no longer the clean exit it was five years ago. A higher-rate landlord pays 24% Capital Gains Tax on the gain, after an annual exempt amount of just £3,000, and the bill has to be reported and paid within 60 days of completion or HMRC charges an automatic £100 penalty. That much, most landlords half-know. Here is the part that has changed: since Section 21 was abolished on 1 May 2026, you can no longer serve a no-fault notice to get the property empty for a tidy vacant sale. The tax was always the cost of leaving. Now the timing of leaving is the harder problem.

So if your plan for 2026 was "sell up, take the cash, walk away", you need to model two things, not one. The tax on the way out. And how long it takes to get a sellable, ideally vacant, property to the market when your only route is the court queue.

How much capital gains tax will you pay selling a buy-to-let in 2026?

Residential property gets its own CGT rates, higher than the rates on shares. For the 2025/26 tax year the charge is 18% on any part of the gain that falls inside your basic rate band and 24% on the rest. Add a five-figure property gain to a normal salary and almost all of it lands in the 24% bracket.

The allowance is where landlords get caught out. The annual exempt amount is £3,000 for 2025/26. Three years ago it was £12,300. So a shelter that used to wipe out the first chunk of a modest gain now barely registers.

Work a real example. Say you bought a terraced two-bed in Manchester for £140,000 in 2014 and you sell it in 2026 for £230,000. Gross gain of £90,000. Knock off, say, £5,000 of buying and selling costs and you are at £85,000. Take the £3,000 allowance and £82,000 is taxable. At 24% that is a CGT bill of £19,680, due within 60 days of completion. Under the old £12,300 allowance you would have saved an extra £2,232 in tax. That gap is the quiet tax rise nobody voted on, delivered by shrinking the allowance rather than touching the headline rate.

If you hold the property in your own name jointly with a spouse, you each get an allowance and each pay at your own marginal rate, which can soften the blow. Getting the ownership split right before you sell is exactly the kind of thing our Tax Structure Advisor plugin is built to model, because the difference between selling solo and selling as a couple can be thousands of pounds.

The 60-day CGT rule that still catches landlords out

Here is a deadline that ruins people's months. When a UK residential disposal creates a CGT liability, you must report the gain and pay the estimated tax within 60 days of completion, through HMRC's online Capital Gains Tax on UK Property service. Not in your January Self Assessment. Within 60 days.

Miss it and the penalty is automatic: £100 straight away, then daily penalties and interest the longer it drifts. The trap is that completion can come faster than your paperwork. You are mid-purchase on the next property, the sale completes, and the 60-day clock starts whether or not you have worked out your base cost and allowable costs yet. Pull your purchase invoices, stamp duty receipts, solicitor fees and major improvement records together before you exchange, not after. The taxable gain is sale price minus purchase price minus allowable costs, and if you cannot evidence the costs, you cannot deduct them.

Why getting vacant possession is now the hard part

This is the change that turns a tax question into a timing question. Before 1 May 2026 a landlord who wanted to sell with vacant possession served a Section 21 notice, got the property empty, and sold to the widest possible pool of buyers, including owner-occupiers and other investors. Section 21 is gone. Every possession now runs through the revised Section 8 grounds.

The relevant route for a sale is Ground 1A, which lets you recover possession where you genuinely intend to sell. It comes with conditions that bite. You cannot use it in the first 12 months of a tenancy. You must give four months notice. And if the tenant does not leave at the end of that notice, you are into the courts, where possession claims are currently taking around 34 weeks to resolve. We dug into those delays in our piece on the 34-week Section 8 backlog, and they apply just as much to a landlord selling as to one dealing with arrears.

So the honest planning question is no longer "what is my CGT bill". It is "do I sell with a sitting tenant at a discount and a smaller buyer pool, or do I spend the best part of a year and several thousand pounds in notice periods, voids and possibly court fees to sell empty". Both cost money. There is no free exit any more.

What HMRC's record CGT haul actually tells you

The numbers say landlords are heading for the door anyway. Capital Gains Tax receipts hit a record £22.2bn for the 2025/26 tax year, comfortably past the previous high. January 2026 alone brought in £16.9bn of CGT, around 69% more than the same month a year earlier, and HMRC and several analysts attribute a large chunk of that to landlords selling rental property before further tax and regulatory tightening. A 2025 landlord survey found 36% planning to sell at least one property within 12 months.

Read that two ways. If you are selling, you are selling into a crowd, which is part of why the rental stock is shrinking and rents in many regions stayed firm even as demand cooled. If you are buying, that same exodus is your opportunity. Motivated landlord-sellers, some with sitting tenants and a desire to be out before the next Budget, are exactly the kind of vendor a disciplined buyer wants across the table. Tools like our Deal Sourcer Assistant are built to surface that sort of stock, and we made the case for buying from exiting landlords in our look at how to spot the best deals as small landlords sell up.

One more thing hangs over all of this. Labour has openly floated equalising Capital Gains Tax with income tax, which for a higher-rate landlord could mean 40% rather than 24% on a property gain. Nothing is confirmed, and pre-Budget kite-flying is not policy. But it explains why so many are choosing to crystallise gains at a known 24% rather than gamble on what a future Budget does.

Sell, incorporate, or hold? Three honest options

There is no universal right answer, so be clear about the trade-off. Selling locks in today's 24% and frees your capital, but you pay the tax now, sell into a crowded market, and wrestle with vacant possession. Incorporating, moving the property into a limited company, can help with mortgage interest relief on a held portfolio, but it triggers CGT and Stamp Duty on the transfer, so it rarely makes sense for a single property you actually want to sell soon. Holding defers the tax entirely and keeps the income, which suits anyone whose numbers still work at current rates and who can live with the regulation.

For most landlords with one or two properties and a long horizon, holding and modelling the position annually beats a panic sale driven by Budget rumours. If the portfolio is the problem rather than one property, the incorporation question is worth proper analysis, and we walked through it in our guide to why 80% of new buy-to-lets are going corporate. You can stress-test how a sale or a hold reshapes your wider position with the Portfolio Growth Planner. The wrong move is selling in a hurry, missing the 60-day deadline, and paying penalties on top of a tax bill you did not need to crystallise this year.

What to do before you list

If selling is genuinely the right call, get three things straight first. Pull together every cost record so you can prove your base cost and deduct everything you are entitled to. Decide early whether you are selling vacant or tenanted, because that choice drives a timeline that can run close to a year under Ground 1A. And model your actual CGT bill, with the £3,000 allowance and any spousal split, so the 60-day payment does not ambush you the week the sale completes.

The tax has not changed much. The exit has. In 2026 the smart landlords are the ones treating a sale as a six-to-twelve-month project with a tax deadline at the end, not a quick win they can rush before the next rule lands.