15 Year Mortgage Calculator UK
Price a UK mortgage in pounds on either a repayment or interest-only basis, with stamp duty context on a 15-year term.
Every figure below is labelled in the currency you pick. Amounts are not converted — enter values in the same currency.
What a 15-year term costs
On $400,000 at 5.25%, a 15-year term gives a payment of $3,215.51 and total interest of $178,792 over the life of the loan. Against the 25-year baseline the payment is $818.52 higher and the lifetime interest is $140,305 — the shorter term saves that much.
Who a 15-year term suits
A shorter term is the cheapest way to borrow if the payment fits comfortably. The risk is that it is contractual: a 30-year loan with voluntary extra payments reaches a similar place while letting you stop in a bad month.
How to use the 15 Year Mortgage Calculator UK
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
15 Year Mortgage Calculator UK — frequently asked questions
What is the monthly payment on a 15-year loan?
On $400,000 borrowed at 5.25% over 15 years, the payment is $3,215.51 and you repay $578,792 in total. Change the amount and rate above for your own figures.
Is this 15 year mortgage calculator uk free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
This page is a focused version of the Mortgage Calculator UK, which handles every variation in one place.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error