How are mortgage interest rates set in the UK?

Mortgage rates are set by a combination of market conditions, lender costs, risk and competition. The rate available to you can also depend on the mortgage product, the size of your deposit or equity, and the lender’s assessment of your circumstances.

What is a mortgage interest rate?

A mortgage interest rate is the percentage a lender charges on the outstanding amount you borrow. It helps determine the interest element of your monthly instalments, alongside the mortgage balance, repayment method and term.

The rate shown for a mortgage deal is not the same thing as every cost connected with buying a home or changing lender. Product fees, valuation or legal costs, and early repayment charges can all matter when comparing options.

How Bank Rate affects mortgage rates

Bank Rate is the policy rate set by the Bank of England’s Monetary Policy Committee. It can influence the rates lenders charge, but it does not automatically set every mortgage rate or require lenders to pass on a change in the same way or at the same time.

For fixed-rate mortgages, lenders also consider relevant-term market rates and expectations about future interest rates, as well as their funding costs, credit risk and competition. Lenders may use retail deposits and wholesale funding, so a fixed-rate offer can change even when Bank Rate is unchanged.

Fixed, tracker and variable mortgage rates

A fixed-rate mortgage keeps its interest rate fixed for the agreed fixed period. When that period ends, the mortgage normally moves to its reversion rate unless you arrange a new deal.

A tracker mortgage follows the reference rate and spread set out in its terms. A standard variable rate or discounted variable product is set by the lender and is not necessarily tied directly to Bank Rate. Check the product documents to understand what can change, when it can change and what rate applies after an introductory period.

What affects the rate you may be offered?

Lenders price products for particular circumstances. They may take account of the property, the purpose of the loan, the type of mortgage, their lending criteria and the risk they are taking.

Your deposit or equity affects loan-to-value (LTV). LTV is the mortgage borrowing divided by the property value, expressed as a percentage. A lower LTV may give you access to different pricing bands, but it does not guarantee the lowest rate. Lenders also assess affordability using income and expenditure, and product eligibility can matter alongside your credit history.

APRC, interest rates and mortgage fees

APRC means Annual Percentage Rate of Charge. For regulated mortgage contracts, it annualises relevant borrowing costs, including applicable fees, over the contractual term using prescribed assumptions. It is useful for comparing products, but it is not the initial interest rate and it does not predict your actual future costs.

Compare the rate for the period you expect to keep the deal, the reversion rate, any product fee and how that fee is paid. Adding a permitted fee to the mortgage means interest is charged on it. Consider other costs that may apply to your circumstances too, such as valuation, legal or broker fees.

Property-purchase taxes are separate from mortgage interest. Stamp Duty Land Tax applies in England and Northern Ireland; Scotland uses Land and Buildings Transaction Tax, and Wales uses Land Transaction Tax. The tax due depends on the relevant rules and your circumstances.

Compare a product transfer with remortgaging

When an existing deal is ending, a new deal with your current lender is often called a product transfer. Remortgaging means moving the mortgage to a different lender. A lower headline rate does not by itself show which option costs less.

Before switching, compare the total cost over the period you expect to hold the deal. Include the interest rate and fees, any early repayment charge on the existing mortgage, and any valuation, legal, broker or incentive terms that apply. Our remortgage guide explains the process in more detail.

How can a broker help?

A mortgage broker cannot set Bank Rate or guarantee the cheapest mortgage. They can help you compare suitable products and explain how rates, fees, eligibility and deal terms affect your options. If you would like to discuss your circumstances, you can contact Extend Finance.