Buy-to-Let Mortgages in the UK
Buy-to-let mortgages are mainly assessed on rental cover rather than personal income. Lender criteria, fees and tax treatment differ sharply from residential — getting the structure right matters.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Quick summary
- Most BTL mortgages are interest-only, with the loan repaid via sale or refinance.
- Lender stress test: rental income usually needs to cover 125–145% of mortgage interest at a stressed rate (often 5.5–8%).
- Limited company (SPV) lending has grown sharply — common for higher-rate taxpayer landlords.
- Minimum deposit is typically 25% (75% LTV).
- Some lenders still require a minimum personal income (often £25k).
What lenders may look at
- Expected rental income vs stressed rate
- Property type and EPC rating
- Borrower experience (portfolio landlord)
- Personal credit + income
- SPV setup and SIC codes (if Ltd)
Documents you may need
- Proof of rental income (existing properties)
- Property details + valuation
- 2 years tax returns or accounts
- Bank statements
- ID + deposit
- SPV incorporation documents (if Ltd)
Common issues
- Rental income tight against stress test — sometimes solvable with a 5-year fixed (lower stress).
- EPC below E — affects lender appetite and reduces rentability.
- Holiday let or HMO — needs a specialist lender.
- Portfolio landlords (4+ properties) face extra portfolio stress tests.
Frequently asked questions
Is buy-to-let still worth it after tax changes? +
It depends — Section 24 removed mortgage interest relief for individual landlords, which is why many now use SPVs. Yield + capital growth still appeal to many.
What’s the typical rental cover ratio? +
125% for basic-rate / Ltd, 145% for higher-rate individuals, stressed at 5.5–8% depending on lender and product length.
Can a first-time landlord get a BTL mortgage? +
Yes — but the lender pool is narrower and a personal income minimum is more likely to apply.
Should I buy in a limited company? +
Often yes for higher-rate taxpayers building a portfolio. Get tax advice — there are SDLT, mortgage rate and accounting implications.
Are HMO and holiday let mortgages different? +
Yes — both need specialist lenders with different stress tests and valuation approaches.
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