Buy-to-Let UK 2025: Is It Still Worth It?

What\'s Changed Since 2016

UK BTL tax has worsened progressively for landlords:

• 2016: 3% SDLT surcharge introduced on additional properties
• 2017-2020: Section 24 phased in — mortgage interest no longer deductible
• 2017: Wear & tear allowance replaced with «replacement of domestic items» relief (much stricter)
• October 2024: SDLT surcharge raised to 5% (from 3%)
• October 2024: CGT on residential property unchanged at 18%/24%, but other CGT raised to match
• December 2024: Scotland\'s ADS raised to 8% (from 6%)
• From April 2026: MTD for Income Tax — landlords with rental > £50k must use digital quarterly reporting

SDLT & the 5% Surcharge

The biggest upfront cost of BTL is stamp duty. In England, you pay the standard SDLT rates PLUS 5% surcharge on the full price (raised from 3% on 31 October 2024):

Examples: £200,000 BTL = £11,500 SDLT (vs £1,500 standard). £350,000 BTL = £27,500 SDLT (vs £7,500). Scotland LBTT ADS is 8%, Wales LTT higher rates start at 5%.

Section 24 — The Killer Blow

Before 2017, landlords deducted mortgage interest from rental income as a standard expense. Now (post-Section 24 phased in 2017-2020):

• Mortgage interest is NOT a deductible expense for personal-name BTL
• You receive a 20% tax credit on interest paid (regardless of your tax band)
• Effectively, higher-rate taxpayers (40%/45%) pay tax on revenue, not profit
• You can be pushed into a higher tax band by gross rental income, increasing tax on your day job too

Worked example: Higher-rate landlord, £15,000 annual rent, £10,000 mortgage interest, £1,000 other expenses:

• Pre-Section 24: tax = 40% × (£15,000 - £10,000 - £1,000) = £1,600
• Post-Section 24: tax = 40% × (£15,000 - £1,000) - 20% × £10,000 = £5,600 - £2,000 = £3,600

That\'s a 125% tax increase on the same property — for the same higher-rate landlord.

Limited Company BTL — The Workaround

Section 24 only applies to personal-name BTL. Limited companies fully deduct mortgage interest and pay Corporation Tax (19-25%) on net profit. Pros:

• Full mortgage interest deductibility
• Corporation Tax at 19% (under £50k profit) or 25% (over £250k)
• No tax on undrawn profits — can reinvest
• Easier to add spouse as shareholder
• Better inheritance planning options

Cons:

• BTL mortgage rates ~0.5-1% higher for ltd companies
• Extra setup (Companies House) and accountancy (£1,000-£2,000/year)
• Transferring existing personal-name BTLs into ltd triggers SDLT + CGT
• Higher CGT on sale (corporation tax on gain) compared with personal CGT allowance

Rental Yields by Region

UK average gross BTL yields (2024 Zoopla / Hamptons data):

• 🔥 North East (Sunderland, Middlesbrough): 8-10% gross
• 🔥 Yorkshire (Bradford, Hull): 7-9% gross
• 📈 North West (Liverpool, Blackpool): 7-8% gross
• 📊 Midlands (Birmingham, Nottingham): 5-6% gross
• 📉 London: 3-4% gross
• 📉 South East: 4-5% gross

Aim for ≥7% gross yield to make BTL financially viable after Section 24, costs and voids. Use our Rental Yield Calculator.

BTL Mortgage Specifics

• Minimum deposit: 25% (75% LTV); 35-40% gets best rates
• Rental cover test: rent must cover 125-145% of interest at stressed rate (often 5.5-7%)
• Income minimum: £25,000-£30,000 personal income usually required
• Age limits: typically loan ends before age 75-80
• Product fees: often higher than residential (£995-£2,500)
• Mortgage types: mostly interest-only (~85% of BTL mortgages); repayment less common

CGT on BTL Sale

When you sell BTL, you pay CGT on the gain (sale price minus original cost minus allowable costs). For 2025/26:

• Annual exempt amount: £3,000
• Rates: 18% (basic rate taxpayer) or 24% (higher/additional rate)
• Must report and pay within 60 days of completion
• Letting Relief: largely abolished since 2020 (only available if shared occupancy with tenant)
• Principal Private Residence Relief: doesn\'t apply unless BTL was once your main home

Use our CGT Calculator and read the CGT Guide.

FAQs