What are buy-to-let mortgage rates and costs in 2026?
In the 2026 UK market, buy-to-let mortgage rates typically sit around 4.5-6.5% depending on your loan-to-value, term, property type, and whether you borrow personally or through a company. But the headline rate is only part of the cost: arrangement fees, valuation and legal fees, the higher-rate stamp duty surcharge, and the trade-off between two-year and five-year fixes all shape what a mortgage really costs. Understanding the full picture is essential to judging whether a deal stacks up.
What drives your buy-to-let rate?
Lenders price each deal on its risk, so several factors move your rate up or down:
- Loan-to-value: lower LTV means a lower rate. A 60% LTV deal is priced well below an 80% one.
- Property type: standard single lets are cheapest; HMOs, MUFBs, and holiday lets cost more.
- Product term: two-year, five-year, and tracker products are priced differently.
- Borrower type: company (SPV) rates have converged with personal rates but can still differ slightly.
- Fee choice: lower-rate products often carry higher arrangement fees, and vice versa.
Because these factors interact, the cheapest headline rate is not always the cheapest overall deal once fees are included.
Should you choose a two-year or five-year fix?
This is one of the most consequential decisions a landlord makes. A five-year fix gives payment certainty and, importantly, many lenders apply a gentler rental stress rate to five-year products, which can let you borrow noticeably more — see our guide to the rental stress test and ICR. The trade-off is a longer early repayment charge if you need to exit. A two-year fix offers flexibility and can be cheaper upfront, but you face remortgage costs and possible rate rises sooner. Landlords focused on maximising borrowing often lean towards five-year fixes; those expecting to sell or restructure soon may prefer two years.
What fees should you budget for?
The true cost of a buy-to-let mortgage goes well beyond interest. Expect:
- Arrangement fee: often 1-2% of the loan, sometimes a flat fee, which can be added to the balance or paid upfront.
- Valuation fee: for the lender's assessment of the property.
- Legal fees: conveyancing for the mortgage, though some remortgage deals include free legals.
- Stamp duty land tax: the higher rate for additional properties adds a significant surcharge on purchase.
- Broker or platform fee: with Assesr this is the 0.5% Assesr Fee, payable only on drawdown — a quarter of the typical broker fee.
How does the stress test affect what a rate lets you borrow?
Two products at the same rate can allow very different loans because of the stress test. A five-year fix stressed at a lower rate may support a larger loan than a two-year fix at a similar pay rate. So when comparing costs, look not just at the rate and fees but at how much each product actually lets you borrow against your rent. Our guides to the rental stress test and deposit requirements explain how these limits work together.
How can you keep total costs down?
Practical ways to reduce the overall cost of buy-to-let borrowing:
- Put down more deposit: dropping an LTV band usually cuts the rate meaningfully.
- Compare rate-plus-fee, not rate alone: a low rate with a 2% fee can cost more than a slightly higher rate with a flat fee.
- Remortgage on time: never drift onto a standard variable rate — see our remortgage guide.
- Match the deal to the right lender: the same property can be priced very differently across lenders.
How do you find the best buy-to-let deal?
With rates, fees, LTV bands, and stress tests all varying between lenders, comparing the whole market on total cost — not just headline rate — is what saves landlords money. Assesr packages your deal into a lender-ready credit paper in around 60 seconds and matches it to specialist buy-to-let finance lenders offering the best overall fit for your property, rent, and structure. You pay nothing until completion — just the 0.5% Assesr Fee on drawdown, a quarter of the typical broker fee.
Frequently asked questions
What are buy-to-let mortgage rates in 2026?
Buy-to-let rates in the 2026 UK market typically sit around 4.5-6.5% depending on LTV, term, property type, and whether you borrow personally or through a company. Lower LTV bands and simpler single-let properties attract the best pricing, while HMOs, holiday lets, and higher LTVs cost more.
Are two-year or five-year fixed buy-to-let mortgages better?
It depends on your goals. Five-year fixes often use a gentler rental stress rate, letting you borrow more, and give payment certainty, but usually carry a longer early repayment charge. Two-year fixes offer flexibility and can be cheaper upfront but expose you to rate changes sooner. Landlords maximising borrowing often favour five-year fixes.
What fees come with a buy-to-let mortgage?
Beyond the interest rate, expect an arrangement fee (often 1-2% of the loan), a valuation fee, legal costs, and the higher-rate stamp duty surcharge on the purchase. With Assesr you also pay the 0.5% Assesr Fee, but only on drawdown when the deal completes — a quarter of the typical broker fee.