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

Tax changes affecting buy-to-let landlords have been relentless. Over the past decade, mortgage interest relief was removed, Capital Gains Tax exemptions were slashed, and Section 24 restrictions were introduced. In 2026, understanding the tax rules isn't optional — it's what determines how much of your rental income you actually keep.

This guide covers the rules that matter to Middlesbrough and Teesside landlords, and where you can legitimately reduce what you owe.

Income Tax & The Mortgage Interest Relief Trap

Your rental profit is taxed as part of your total income. After legitimate expenses, it adds to your salary or pension and is taxed at your marginal rate.

For 2026/27:

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 allowances since 2021 is a stealth tax affecting landlords. As rents rise, more profit gets pushed into higher bands without any increase in purchasing power. A Middlesbrough landlord earning £40,000 with £8,000 rental income stays in the basic band at £48,000. But if rents rise and a second property generates another £8,000, that marginal income is taxed at 40%.

The bigger problem: the Section 24 mortgage interest restriction.

Since April 2020, you cannot deduct mortgage interest as a business expense. You get a tax credit at 20% instead. The impact depends on your tax band:

Basic rate (20%): Broadly neutral. The 20% credit equals the old deduction.
Higher rate (40%): You lose significantly. Previously 40% relief; now 20% credit. On £5,000 annual interest, that's £1,000 extra tax per year.
Additional rate (45%): Worse still. The gap is 25%.

Teesside landlords have an advantage. Our property prices and mortgages are lower than London or the South East. A £75,000 mortgage at 4.5% costs roughly £3,375 in annual interest — the Section 24 cost to a higher-rate taxpayer is about £675 per year. (That's material, but manageable alongside Teesside yields.) If you're stacking properties, it compounds.

Getting your buy-to-let mortgage options right — shopping for a lower rate — saves money twice: lower repayment, lower tax credit loss.

Stamp Duty: What Buy-to-Let Actually Costs

Stamp Duty Land Tax (SDLT) includes a 3% surcharge on buy-to-let purchases. This is upfront cost that factors into your yield calculation.

Purchase Price	Standard SDLT	Buy-to-Let (+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 most Teesside properties (£80,000–£150,000), the surcharge adds £2,400–£4,500 to your cost. If you're buying in TS5 or TS7 for yield, that tax cost must be built into your break-even timeline. The strongest postcode yields in Teesside over the last 18 months have been in the TS5 area — the Stamp Duty cost there is still recoverable within 4–5 years on average.

The surcharge doesn't apply to first residential homes or spousal transfers — but it applies to every buy-to-let, every purchase.

Capital Gains Tax When You Sell

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

For 2026/27:

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

The reduction in the exemption — from £12,300 to £3,000 in three years — means almost all property gains are taxable. A Middlesbrough landlord buying at £90,000 and selling at £130,000 has a £40,000 gain. Less the £3,000 exemption, that's £37,000 taxable. At 24%, that's £8,880 in tax.

You can offset against the gain:

Purchase costs (solicitor, Stamp Duty paid)
Genuine improvements (extension, new kitchen) — not repairs
Selling costs (agent, solicitor fees)

Record-keeping from day one is essential. Every receipt, every invoice for improvements. Improvements are the ones worth fighting for — they materially reduce your CGT. Build a spreadsheet from purchase; it pays dividends five or ten years later.

Should You Move Into a Limited Company?

The tax restrictions have prompted many landlords to consider incorporating. A limited company pays Corporation Tax (19–25%) rather than income tax (20–45%), and deducts mortgage interest fully against profits. No Section 24 restriction.

The advantages:

Full mortgage interest deduction against profits
Lower effective tax rate on retained profits
No Section 24 restriction
Potential pension benefits

The disadvantages:

Stamp Duty on transfer (buy-to-let surcharge applies)
Capital Gains Tax crystallised on transfer
Limited lenders offer company mortgages; rates are higher
Higher accountancy costs
Extracting profits triggers additional tax (dividend tax or salary)

For Teesside landlords with 1–3 properties, incorporation rarely makes financial sense once you account for transfer costs. The tax saving is offset by Stamp Duty and accountancy fees.

For larger portfolio landlords buying new properties, it's worth exploring. Read our guide on limited company structure and step-by-step setup. Professional tax advice specific to your situation is essential.

What You Can (and Cannot) Deduct

Every pound you legitimately deduct reduces your tax bill. Allowable expenses:

Letting agent fees
Buildings and contents insurance
Ground rent and service charges (leasehold)
Council tax (void periods only)
Utilities (if you pay them)
Maintenance and repairs
Legal fees for tenancy agreements
Accountancy fees
Advertising for tenants
Travel for property management
Landlord licensing fees

You cannot deduct:

Mortgage capital repayments (only interest, as a tax credit)
Improvements (these reduce CGT when you sell, not income tax)
Personal use costs
Buying and selling costs (CGT deductions, not income tax)

The repair vs. improvement distinction catches landlords frequently. A new boiler is repair. An efficient upgrade to a new boiler is repair. Underpinning the foundation is maintenance. Extending the property is improvement. When in doubt, ask your accountant before spending — it's cheaper than HMRC correcting you later.

Making Tax Digital: The 2026 Timeline

Making Tax Digital (MTD) for landlords is rolling out in phases. From April 2026, landlords with annual property income above £50,000 must use compatible software and file quarterly updates with HMRC. The £30,000 threshold follows in April 2027.

For many Teesside landlords with 1–2 properties, you'll fall below both thresholds initially. But MTD is coming to everyone eventually. Getting your digital records in order now — accounting software, expense tracking, photo documentation — will smooth the transition when it applies to you.

Frequently Asked Questions

Can I claim a home office cost if I manage my own properties?

No. You can claim travel to visit properties and genuine business expenses (software, accountancy). But a home office is personal. Some professional landlords claim a proportion of office space — that requires detailed documentation and accountant sign-off.

Is it worth incorporating just for the mortgage interest deduction?

Not usually for small portfolios. The Stamp Duty and CGT on transfer, plus higher accountancy costs, eat most of the tax saving. For 4+ properties, it's worth exploring with an accountant. If you're buying new properties, setting up a company from the start is different — discuss with a professional.

What happens if I don't keep receipts?

HMRC may disallow expenses you can't evidence. For minor items, they're often reasonable. For major expenses (boiler replacement, significant repairs), you need documentation. Photographs of the work are helpful.

Can I deduct furnishings and decoration?

No. These are capital costs. A new carpet, fresh paint, furniture — these are improvements you offset against CGT when you sell, not against rental income.

If I sell a property, do I pay tax on the entire sale price?

No. You pay CGT only on the gain: sale price minus purchase price, minus improvement costs, minus the annual exempt amount (£3,000 for 2026/27).

Does Making Tax Digital apply to me yet?

If annual property income is below £50,000, not yet. From April 2026, it applies to income above £50,000. From April 2027, the threshold drops to £30,000. Check your last tax return.

Can I offset losses against other income?

Yes. If one property makes a loss, you can offset it against profits from other properties or other income in some circumstances. This is complex — discuss with your accountant before relying on it. See our guide to landlord tax planning for 2026/27 for more on structuring losses and profits across your portfolio.

What's the difference between a repair and an improvement?

Repair restores to original condition (new boiler, mended roof, replastered wall). Improvement upgrades or extends (efficient replacement boiler, roof conversion, extension). Only repairs are deductible. Improvements reduce CGT when you sell.

The tax environment for landlords isn't getting more generous. The best response is meticulous planning, clear record-keeping, and claiming every legitimate expense. If you're planning significant property moves — a new purchase, a refinance, or portfolio restructure — get tax advice at year-end before you act.

If you're a Middlesbrough landlord looking for professional property management that simplifies your tax position with documented expenses and clear reporting, contact Ascot Knight.