mortgage calculator
What would your repayments be?
Enter your mortgage amount, interest rate and term for an instant estimate of your monthly repayment — no sign-up, no catch.
your figures
Estimate your monthly repayment
your estimate
Estimated monthly repayment
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On a capital & interest mortgage over 25 years.
Total repaid
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Total interest
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This is an estimate — for a figure tailored to you, speak to an adviser.
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These figures are an illustration only and assume a repayment (capital & interest) mortgage on a single fixed rate for the full term. Your actual payments will depend on the lender, product, rate changes and your circumstances — speak to an adviser for a personalised illustration.
For example: borrowing £200,000 over 25 years at 4.5% works out around £1,112 a month — about £133,500 of interest over the full term.
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Your home may be repossessed if you do not keep up repayments on your mortgage.
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three simple steps
How this mortgage repayment calculator works.
Pop in your numbers
Enter the mortgage amount, an interest rate and the term. Drag the sliders or type the figures — the estimate updates as you go.
See your monthly figure
We work out the monthly repayment on a capital & interest mortgage, plus the total you’d repay and the interest over the full term.
Get a figure tailored to you
A calculator can’t see your full picture. A no-obligation 20-minute chat gets you a real quote from over 100 lenders and thousands of deals — and your options explained.
Book a no-obligation chatin plain english
Know your three numbers.
Change any one of them and your monthly figure moves. Here’s what each one means.
Mortgage amount
The amount you’re borrowing — the purchase price (or property value) minus your deposit.
Interest rate
The rate the lender charges on what you owe. Even a small change moves the monthly figure, so it’s worth trying a few.
Term
How long you take the mortgage over. A longer term lowers the monthly payment but means more interest overall.
This is an estimate, not a quote — speak to an adviser for a personalised illustration tailored to your circumstances.
good to know
Your questions, answered.
How accurate is this mortgage calculator?
It’s a solid illustration, not a quote. It uses the standard repayment-mortgage formula, so the monthly figure is mathematically correct for the amount, rate and term you enter. What it can’t do is factor in lender fees, your credit profile, the deposit you have, or whether you’d actually qualify for that rate — that’s what an adviser is for.
Does it include fees, insurance or stamp duty?
No. The figure shown is the mortgage repayment only. Arrangement fees, buildings insurance, life cover, stamp duty and other costs sit on top — we’ll talk you through the full picture when we meet so there are no surprises.
What would the repayments be on a £150,000 mortgage?
As an example-rate illustration: £150,000 over 25 years at 4.5% works out around £834 a month, with roughly £100,100 of interest over the full term. Your own rate and term will move that figure — try the calculator above with your numbers, then ask us what rate you’d actually be offered.
What would the repayments be on a £250,000 mortgage?
Using the same example rate: £250,000 over 25 years at 4.5% comes out around £1,390 a month, with about £166,900 of interest over the full term. It’s an illustration rather than a quote — the rate you’re offered and the term you choose will change both numbers.
Should I take a longer term to lower my payments?
It’s a genuine trade-off. Stretching the term brings the monthly payment down, which can make a tight budget workable — but you’re paying interest for longer, so the total cost over the life of the mortgage goes up. Some people start longer and shorten the term later as their income grows. We’ll help you weigh up what suits your circumstances.
What rate should I assume?
If you’re not sure, try a few. The rate you put in is just an example — your real offer depends on the lender, the product, your deposit and your circumstances, so there’s no single “right” number to assume. Running a lower and a higher rate shows you the spread, and we’ll tell you what you’d actually be offered when you’re ready.
What’s the difference between repayment and interest-only?
This calculator assumes a repayment (capital & interest) mortgage — each payment clears a little of the balance, so you own the home outright at the end of the term. Interest-only payments are lower but leave the full balance to repay separately. Most residential buyers are on repayment; we’ll advise on what suits you.
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Crunched the numbers? Let’s make them real.
A no-obligation 20-minute chat turns a rough estimate into a proper quote — searching over 100 lenders and thousands of deals, with a friendly adviser who explains every option.