Today’s best buy-to-let purchase rates, ranked on what you’ll actually pay.

With a residential purchase the deposit drives the rate; with a buy-to-let purchase the rent often drives the loan size before the deposit even comes into the picture. Lenders apply an interest coverage ratio — the rent must cover the stress-tested mortgage payment by a set margin, typically 125% for basic-rate taxpayers and 145% for higher-rate taxpayers. In lower-yield areas this can mean the rent caps what you can borrow well below the LTV ceiling, regardless of how large a deposit you have. The tables above use £200,000 interest-only to illustrate monthly payments, which is the market convention.

Two costs are worth looking past the headline rate. First, percentage arrangement fees — common on the keenest BTL purchase deals, often 2–3% of the loan — can turn an apparently cheap rate into an expensive one on larger loans. The true-cost column accounts for this. Second, many lenders require purchase applicants to already own their own home; first-time landlords who haven’t yet bought a residential property find their choice of lender noticeably narrower. The LTV filter above prices your specific deposit band; the term pills let you compare 2 and 5-year fixes on the same rental property.