Updated October 2026 · Fraser Bond
Mortgages · Buy-to-let
Buy-to-let deposits
25%typical
ICRcan limit
SDLT+5%
Calculatorcash needed
In short: Most buy-to-let lenders want a deposit of at least 25%, with some offering 20% or even 15% at higher rates. In London, the rental cover test often limits the loan more than the deposit does: lenders typically need rent of 125% to 145% of interest at a stress rate, so lower-yield homes may need 30 to 40% down. You also need cash for stamp duty including the 5% surcharge, legal fees, any broker and lender fees, and furnishing or works.
Total cash needed
Deposit–
Stamp duty (with 5% surcharge)–
Total cash needed–
England rates from April 2025.
Frequently asked questions
Can I get a BTL mortgage with 15% deposit?
A few lenders offer this.
Why might I need more than 25%?
To pass the rental cover test.
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