Our FCA-regulated advisers help thousands of homebuyers across the UK find the right mortgage every year. Here's what to keep in mind when using this calculator.
Even a 0.5% difference in interest rate can save or cost you thousands over your term. A whole-of-market broker compares hundreds of lenders, not just your high street bank to find your best rate.
A 25-year term gives lower monthly payments, but you'll pay considerably more in interest than a 20-year term. Our advisers help you strike the right balance between affordability and total cost.
Once you know your comfortable repayment range, a mortgage in principle takes around 15 minutes and shows sellers you're a serious, ready buyer giving you a real edge.
A repayment mortgage means your monthly payment covers both the interest charged and a portion of the capital you borrowed. By the end of your term — typically 25 to 35 years — you'll own your home outright with nothing left to repay.
This calculator gives a reliable estimate based on the figures you enter. Your actual monthly payment will depend on your lender's specific terms, whether your rate is fixed or variable, and any fees rolled into the loan. An adviser can give you exact figures from real lender products.
With interest-only, you pay just the interest each month, your balance never reduces. At the end of the term, you still owe the full original amount. Repayment mortgages are far more common for residential buyers as you're guaranteed to fully pay off the loan.
The main ways to lower your payment are: extending your mortgage term, securing a lower interest rate through a whole-of-market broker, or increasing your deposit or equity. Each option has trade-offs, our adviser can walk you through what makes sense for your situation.
Yes, the calculation works the same way. However, buy-to-let lending criteria and rates differ significantly from residential mortgages. Speak to one of our advisers for specialist buy-to-let guidance tailored to your portfolio goals.
Our fee-free advisers search the whole market to find you the right deal — at no cost to you. FCA-regulated, whole-of-market advice from people who've done this thousands of times.
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Fee Free Mortgage Broker is a trading style of Alexander Southwell Mortgage Services Ltd, authorised and regulated by the Financial Conduct Authority (FCA) (FRN 1011890).
Registered in England & Wales (Company No. 11772228).
Registered office: Nix Business Centre, 2 Park Court, Abbey Park Industrial Estate, Romsey, Southampton, SO51 9DH. We are registered with the Information Commissioner’s Office, registration number ZA488146.© 2026 , Inc. All rights reserved.
Information on this website is for general guidance only and is accurate at the time of writing. It does not constitute personalised financial advice. Mortgage criteria and lender policies can change; please speak to an FCA-authorised adviser for up-to-date advice tailored to your circumstances. Some buy-to-let mortgages are not regulated by the FCA.
Your home may be repossessed if you do not keep up repayments on a mortgage or any other debt secured on it.
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