It is the question thousands of UK landlords are turning over in 2026. A run of tax changes, higher mortgage rates and the biggest shake-up of renting law in a generation have made buy-to-let harder work than it was a decade ago — and for some, less profitable. But selling is a big, largely irreversible decision with costs of its own. This guide walks through the factors worth weighing, and shows how to use real sold-price data to ground the decision in numbers rather than headlines.
A note up front: this is general information, not personal financial or tax advice. Everyone’s position — income, other assets, mortgage, plans for the money — is different, so treat the sections below as a checklist to take to a qualified accountant, tax adviser or independent mortgage broker.
Why so many landlords are asking in 2026
Several changes have landed close together, and together they change the maths:
- Mortgage interest relief (Section 24). Since 2020, individual landlords can no longer deduct mortgage interest as a cost. Instead you get a flat 20% tax credit, which pushes some higher-rate taxpayers into a much larger bill — occasionally tax on a property that barely breaks even. HMRC explains the mechanism with worked examples here.
- The end of Section 21. The Renters’ Rights Act 2025 abolished no-fault (Section 21) evictions from 1 May 2026. All tenancies are now periodic (rolling), and to regain possession a landlord must use the Section 8 process and prove a valid legal ground in court. For some landlords the loss of a straightforward exit route is the deciding factor.
- Making Tax Digital. From April 2026, landlords with gross property income over £50,000 must keep digital records and file quarterly updates to HMRC, with the threshold dropping to £30,000 in 2027 and £20,000 in 2028. More admin, or an accountant’s bill to handle it.
- Stamp duty on expansion. The surcharge on additional properties rose to 5% in October 2024, on top of standard Stamp Duty Land Tax rates — making it more expensive to grow a portfolio, and tilting some landlords toward consolidating instead.
- Mortgage rates. Buy-to-let mortgages are materially dearer than in the 2010s, squeezing cash flow when fixed rates expire. The current Bank of England base rate is the reference point to watch.
The case for holding on
None of the above is automatically a reason to sell. UK residential property has delivered long-run capital growth, rental demand remains strong in much of the country, and rents have risen sharply in recent years — which supports yields even as costs climb. If your mortgage is modest (or the property is owned outright), Section 24 bites far less, and the income can be a valuable part of a retirement plan. Many landlords who crunch the numbers conclude that the sensible move is to restructure rather than exit — more on that below.
Run the numbers before you decide
The headlines are national; your decision is local and specific. Before doing anything, get concrete about your own property:
- What is it actually worth? Look at what comparable homes on your street and postcode have sold for — completed prices, not asking prices. You can search sold prices by street or postcode, and each area has a full breakdown of recent sales and street-level averages.
- Which way is your local market moving? A falling market might argue for selling sooner; a rising one might reward patience. Our investment trends pages show median prices and year-on-year change by county — for example Greater London or Greater Manchester — so you can see whether your area is among the risers or the fallers.
- What is your real yield? Take annual rent, subtract mortgage interest, management, insurance, maintenance and void periods, then compare the net figure against the equity tied up in the property. If that money could work harder (or more passively) elsewhere, that is a genuine argument for selling; if the yield plus expected growth still beats the alternatives, holding may win.
All of our figures come from HM Land Registry Price Paid data — the actual price paid on completed sales across England and Wales — so they reflect what buyers really committed, not estimates.
The costs of selling
Selling is not free, and the costs can be larger than landlords expect:
- Capital Gains Tax. Gains on a residential investment property are taxed at 18% (basic rate) or 24% (higher/additional rate), after the annual exempt amount (£3,000 for 2025/26). CGT on UK property must usually be reported and paid within 60 days of completion — see gov.uk on Capital Gains Tax. On a property held for many years this can be a very large bill, so model it before you commit.
- Fees and timing. Estate agent and legal fees, an EPC, and possible early-repayment charges on a fixed mortgage all eat into the proceeds. Selling with a tenant in situ, or waiting for a void, both have trade-offs.
Alternatives to selling outright
“Sell or keep” is not the only choice. Depending on your circumstances, it may be worth exploring:
- Incorporating — holding property through a limited company changes how mortgage interest and profits are taxed, which suits some higher-rate landlords. But transferring an existing property into a company can trigger CGT and stamp duty, so this only makes sense with specialist tax advice.
- Remortgaging or releasing equity to improve cash flow or fund improvements that lift the rent and value.
- Selling part of a portfolio — offloading the weakest-yielding properties while keeping the strongest, rather than exiting entirely.
So — should you sell?
There is no universal answer. If the numbers are thin, the admin and legal burden outweighs the return, and the equity would genuinely work harder elsewhere, selling can be the right call. If the property has low debt, sits in an area with solid demand and growth, and forms part of a long-term income plan, holding — or restructuring — often wins. The way to find out is to replace assumptions with figures: check what similar properties have sold for, see which way your area is trending, work out your true net yield, model the CGT bill, and then take those numbers to a qualified accountant, tax adviser and mortgage broker before you act.
This article is for general information only and does not constitute financial, tax, legal or investment advice. Tax rules and thresholds change and depend on your personal circumstances — always confirm the current position on gov.uk and take professional advice before making a decision.