Mortgage calculator (UK)
Use this free UK mortgage calculator to estimate monthly repayments, total interest and a simple affordability guide.
Free mortgage repayment calculator
This mortgage calculator helps you estimate a monthly repayment based on property price, deposit, interest rate and mortgage term. It is designed for quick planning and comparisons, whether you are a first-time buyer or moving home. Results are estimates and should be used as a guide, not financial advice.
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Calculate your mortgage
The purchase price of the property.
How much you are putting down upfront.
Use the annual interest rate on your mortgage offer.
Common terms are 20, 25, 30 or 35 years.
Affordability (optional)
Add your take-home pay and other monthly outgoings to see a simple affordability guide.
Net monthly pay after tax.
Bills, travel, food, childcare, subscriptions, and so on.
Estimated monthly payment: –
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Mortgage calculator FAQs
How does this mortgage calculator work?
The calculator uses a standard repayment mortgage formula based on your loan amount, interest rate and term. It assumes the interest rate stays the same across the full term, which may not match a real mortgage deal.
Is this a UK mortgage calculator?
Yes. It is designed for UK users and uses pounds (£). It is still an estimate, so always confirm figures with a lender or broker.
Does it include interest-only mortgages?
No. This tool estimates repayment mortgages, where you repay the interest and the loan amount over time.
How should I use the affordability section?
If you add take-home pay and monthly outgoings, the calculator compares the mortgage payment to your income and remaining budget. This is a simple guide only and does not reflect lender affordability checks.
Why might my real mortgage payment be different?
Your actual payment can change due to fixed-rate periods ending, product fees, lender criteria, insurance, and rate changes. Use this calculator for quick planning, then confirm figures with a formal quote.
This free mortgage calculator is useful for comparing scenarios quickly. Try adjusting the deposit, interest rate or mortgage term to see how your monthly payment and total interest changes.
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