Tax Changes Affecting Buy-to-Let Landlords in 2026: What You Need to Know

Tax has been the single biggest policy lever used to reshape the buy-to-let landscape over the past decade. From the phased removal of mortgage interest relief to increased Stamp Duty surcharges and Capital Gains Tax changes, landlords have faced a steady tightening of the tax environment. In 2026, several developments continue to affect how much of your rental income you actually keep.

This guide covers the key tax rules and changes that every buy-to-let landlord in Middlesbrough and Teesside needs to understand.

Income Tax on Rental Profits

Rental income is taxed as part of your total income. After deducting allowable expenses, your rental profit is added to your other income (salary, pension, etc.) and taxed at your marginal rate.

For the 2026/27 tax year:

Personal allowance: £12,570 (frozen since 2021)
Basic rate (20%): £12,571 to £50,270
Higher rate (40%): £50,271 to £125,140
Additional rate (45%): Above £125,140

The freeze on the personal allowance and tax bands — in place since 2021 and not currently scheduled to end — is the biggest stealth tax affecting landlords. As rents increase with inflation, more rental profit is pushed into higher tax bands without any actual increase in purchasing power.

For a Middlesbrough landlord with a day job earning £40,000 and net rental income of £8,000 from two properties, total taxable income of £48,000 keeps them in the basic rate band. But if rents rise and expenses do not increase proportionally, they could easily cross into the higher rate threshold — at which point every additional pound of rental income is taxed at 40%.

Mortgage Interest Tax Relief: The Full Impact

The Section 24 restriction on mortgage interest relief, fully implemented since April 2020, remains the most significant tax change affecting leveraged landlords.

Under the current rules, you cannot deduct mortgage interest as a business expense. Instead, you receive a tax credit at the basic rate (20%) of your mortgage interest costs. The practical impact depends on your tax bracket.

Basic rate taxpayer: The net effect is broadly neutral. You receive a 20% tax credit on mortgage interest, which is equivalent to the old deduction at 20%.

Higher rate taxpayer: You lose out significantly. Previously, a higher rate taxpayer could deduct mortgage interest at 40%. Now, the tax credit is only 20%. On £5,000 of annual mortgage interest, the difference is £1,000 per year in additional tax.

Additional rate taxpayer: The impact is even greater, with a 25% differential between the old relief and the current credit.

For Teesside landlords, the relatively low property prices and mortgage amounts soften this blow compared to landlords in London or the South East. A £75,000 mortgage at 4.5% generates £3,375 in annual interest. The Section 24 restriction costs a higher rate taxpayer an additional £675 per year on that amount — meaningful, but manageable alongside Teesside's strong yields.

Stamp Duty Land Tax Surcharge

The 3% Stamp Duty surcharge on additional residential properties remains in place. For buy-to-let purchases in Middlesbrough, this adds a significant upfront cost.

| Purchase Price | Standard SDLT | Buy-to-Let SDLT (inc. 3% surcharge) | |---------------|---------------|--------------------------------------| | £85,000 | £0 | £2,550 | | £120,000 | £0 | £3,600 | | £175,000 | £1,250 | £6,500 | | £250,000 | £2,500 | £10,000 |

For investors buying in the TS1 to TS5 price range (£80,000 to £150,000), the surcharge typically adds £2,400 to £4,500 to the purchase cost. This must be factored into your initial yield calculations and time-to-break-even projections.

Capital Gains Tax on Property Sales

When you sell a buy-to-let property, Capital Gains Tax (CGT) applies to any profit above your annual exempt amount.

For 2026/27:

Annual CGT exempt amount: £3,000 (reduced from £6,000 in 2023/24 and £12,300 before that)
Basic rate CGT on residential property: 18%
Higher rate CGT on residential property: 24%

The dramatic reduction in the annual exempt amount — from £12,300 to £3,000 in just three years — means that almost all property sale profits are now taxable. A Middlesbrough landlord selling a property purchased for £90,000 at a price of £130,000 would face CGT on £37,000 of gain (after the £3,000 exemption). At the higher rate, that is £8,880 in tax.

You can offset certain costs against the gain, including:

Purchase costs (solicitor fees, Stamp Duty)
Improvement costs (not repairs — only capital improvements)
Selling costs (agent fees, solicitor fees)

Careful record-keeping from the point of purchase is essential. Every receipt matters when calculating your CGT liability.

The Incorporation Question

The tax changes of recent years have prompted many landlords to consider transferring their properties into a limited company. Companies pay Corporation Tax (currently 25% for profits above £250,000, with a lower effective rate for small profits) rather than income tax, and can deduct mortgage interest as a genuine business expense.

The advantages:

Full mortgage interest deduction against profits
Lower tax rate for retained profits (19% to 25% vs up to 45% for personal income tax)
No Section 24 restriction

The disadvantages:

Stamp Duty on transfer — transferring existing properties to a company triggers Stamp Duty at the buy-to-let surcharge rate
CGT on transfer — the transfer is a disposal for CGT purposes, crystallising any gain
Mortgage complications — not all lenders offer company buy-to-let mortgages, and rates can be higher
Higher accountancy costs — company accounts are more expensive to prepare
Extracting profits — taking money out of the company triggers additional tax (dividend tax or salary)

For Teesside landlords with small portfolios (one to three properties), incorporation rarely makes financial sense once the transfer costs are accounted for. For larger portfolio landlords, particularly those purchasing new properties, buying through a company from the outset is worth serious consideration.

The decision should always be made with professional tax advice specific to your circumstances.

Allowable Expenses: What You Can Deduct

Understanding what you can legitimately deduct from your rental income is critical to minimising your tax liability. Allowable expenses include:

Letting agent fees and management costs
Buildings and contents insurance
Ground rent and service charges (if leasehold)
Council tax (during void periods only)
Utility bills (if you pay them)
Maintenance and repair costs (not improvements)
Legal fees for tenancy agreements
Accountancy fees
Advertising costs for finding tenants
Travel costs for property management visits
Landlord licensing fees

You cannot deduct:

Mortgage capital repayments (only interest, as a tax credit)
The cost of improvements (these reduce your CGT liability when you sell)
Personal use expenses
Costs relating to buying or selling the property (these are CGT deductions)

Making Tax Digital for Landlords

Making Tax Digital (MTD) for Income Tax Self Assessment is being rolled out in phases. Landlords with annual property income above £50,000 are required to comply from April 2026, with the £30,000 threshold following in April 2027.

Under MTD, you must use compatible software to keep digital records and submit quarterly updates to HMRC, rather than filing a single annual tax return. This affects how you manage your accounting and may increase your accountancy costs.

For many Middlesbrough landlords with one or two properties generating combined rental income below these thresholds, MTD will not apply immediately. But it is coming, and getting your record-keeping systems in order now will make the transition smoother.

Plan Ahead, Pay Less

The tax environment for landlords is unlikely to become more generous. The best response is to plan carefully, keep meticulous records, claim every legitimate expense, and work with a good accountant who understands property tax.

If you are a Middlesbrough landlord looking for professional property management that simplifies your tax position with clear, documented expenses and comprehensive reporting, contact Ascot Knight. Visit ascotknight.co.uk or call 01642 043 to find out how we can help.