Why the Bank of England Base Rate Matters for Buy-to-Let Mortgages

What is the Bank of England Base Rate?

The base rate is the interest rate at which the UK’s central bank lends money to commercial banks, i.e. the ones you would use for your current account, business account, mortgage, etc. The base rate is set by the Bank of England’s Monetary Policy Committee, or MPC. This committee meets regularly to decide whether to raise, lower, or hold the base rate to keep the UK economy stable and control inflation. The base rate changes about 8 times a year following an MPC meeting in which the members of the MPC vote on how the base rate should change. At the time of writing (December 2025), the base rate is 4%, although the MPC is scheduled to review this on December 18th, so it may change soon.

Is it Better to Have a Higher or Lower Base Rate?

If you are looking to borrow money, whether in the form of a loan, credit card or mortgage, a lower base rate will be more ideal. Of course, banks will set their own interest rates for these products, but the BoE base rate will heavily influence them. If the base rate is higher, it is more ideal for those with savings, ISAs and cash deposits. A lower base rate encourages more borrowing and spending, which boosts the economy. A higher base rate leads to less spending, which can help to stabilise an economy experiencing high inflation.

How is the Bank of England Base Rate Set?

As mentioned previously, the BoE base rate is set by the Monetary Policy Committee (MPC). There are nine members of this committee, including the Governor of the Bank of England, three Deputy Governors for Monetary Policy, Financial Stability and Markets and Banking, our Chief Economist and four external members appointed directly by the Chancellor. A representative from the HM Treasury also sits in on meetings and can discuss policy issues, but is not allowed to vote on the base rate. The MPC discusses the latest economic data on inflation, growth, wages, employment and other factors and votes on whether to raise, hold or reduce the base rate.

Bank of England Base Rate Predictions for 2026

The bank rate has been steadily reduced over the past 2 years in an effort to curb inflation and boost spending, from 5.25% in August 2023 to 4% as per the last MPC meeting in November 2025. Many experts predict a modest reduction in the base rate from 4% to 3.75% in December 2025 and a further reduction to 3.5% in the early months of 2026. This aligns with inflation peaking in September 2025 at 3.8%, unemployment rising to 5%, and government spending set to slow in 2026 as per the latest UK budget. This is just a prediction – keep up to date with all base rate changes at the Bank of England website

How does the Bank of England Base Rate Affect Buy-To-Let Mortgages?

As the base rate sets the baseline costs for mortgage lenders, buy-to-let mortgage rates are significantly impacted, as are other types of mortgages. The higher the base rate, the higher the interest rate for mortgages and other types of lending. As most BTL mortgages are interest-only mortgages, they are particularly sensitive to base rate changes. When rates rise, there is no capital repayment to cushion the increase.

If you have a fixed interest rate mortgage, the base rate will not affect the mortgage until it is time to renew the mortgage, and your monthly payments will stay the same until the fixed term ends. Once the fixed period ends, the mortgage usually reverts to the lender’s standard variable rate unless you remortgage. If you have a standard variable rate mortgage, the base rate will affect the mortgage rates as it changes. While the lender sets the interest rates on SVR mortgages, they will be heavily influenced by the base rate. Tracker buy-to-let mortgages are affected the most by the base rate, as the interest rate tracks the BoE base rate plus a set margin, hence the name. Interest payments will rise and fall in line with base rate changes.

How the Bank of England Base Rate Affects Other Mortgages

The Bank of England base rate influences the cost of borrowing across the entire mortgage market. While lenders set their own mortgage rates, the base rate acts as a benchmark, meaning changes to it typically feed through to residential, specialist, and commercial mortgages in different ways. Commercial mortgages (for shops, offices, or mixed-use buildings) are often more closely tied to the base rate, and many are variable or tracker-based. Investors in the commercial sector should be prepared for base rate volatility and how rate rises can affect cash flow.

Self-build and other specialist mortgages can also be influenced more by base rate changes, as higher base rates lead to stricter lending criteria, and borrowers can face higher rates or fewer choices in mortgage products.

Tracking the Bank of England Base Rate for Landlords & Property Investors

Tracking the Bank of England base rate is essential for landlords and property investors, as even small changes can have a significant impact on mortgage costs, cash flow, and refinancing options. Investors should keep an eye on upcoming MPC meeting dates, not just headline rate changes, as market expectations are often priced into mortgage deals in advance. Comparing current rates against your own mortgage type can help you understand how exposed you are to rises. It’s also sensible to stress-test your portfolio at higher rates, review when fixed-rate deals end, and speak to a specialist broker early rather than waiting for rates to move. Taking a proactive approach allows landlords to plan remortgages, adjust rents where appropriate, and make informed decisions rather than reacting under pressure.

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