Mortgage repayment calculator
See your monthly payment, the total you’d repay, and what a higher rate or overpaying would mean.
Your mortgage
Answer the questions and your payment will appear here.
Monthly payment
If your rate rose 1%
Estimates
Your mortgage
If your rate rose 1%
Rates often go up when a fixed deal ends.
Not a mortgage offer. Fees aren’t included.
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Questions about mortgage payments
Quick answers to what buyers ask most.
Where our figures come from
- Results checked against MoneyHelper’s mortgage calculator, 28 October 2026.
- Repayment and interest-only, deals and fees: MoneyHelper on repayment and interest-only, interest rates and fees, checked 28 October 2026.
- Overpaying: MoneyHelper on paying off your mortgage early, checked 28 October 2026.
- Typical rate and term: the Bank of England’s average quoted rate for a 2-year fixed mortgage with a 10% deposit, September 2026, and the FCA’s figures on first-time buyer terms (most borrow over 30 years or more).
How much is a mortgage on £200,000 or £300,000?
At 5.37% over 30 years, on a repayment mortgage:
- £150,000 mortgage: about £839 a month.
- £200,000 mortgage: about £1,119 a month.
- £250,000 mortgage: about £1,399 a month.
- £300,000 mortgage: about £1,679 a month.
These are for the amount you borrow, not the price of the home. Take off your deposit first. Your rate and term will change the payment.
What’s the difference between repayment and interest-only?
With a repayment mortgage, each payment covers the interest and pays off some of the loan. If you keep up the payments, you owe nothing at the end of the term.
With interest-only, you pay just the interest. Your payments are lower, but you still owe the whole loan at the end, so you need a plan to pay it back, such as savings or selling the home.
The payments are often not much lower than repayment. At today’s rates, most of a repayment mortgage’s early payments are interest anyway. Very few interest-only mortgages are offered now, usually for buy-to-let or later life, because many people in the past had no way to pay the loan back at the end.
What happens when my deal ends?
A fixed rate usually lasts 2 to 10 years. When it ends, you move to the lender’s standard variable rate unless you choose a new deal. That rate is often higher, so your payment is likely to go up. That’s why the result shows a rate 1% higher.
Is it normal to pay this much interest?
Over a long term, yes. At 5.37% over 30 years, the interest on a £200,000 mortgage is about £203,000, a little more than the loan itself.
A shorter term or a lower rate cuts it. Over 25 years at the same rate, it’s about £164,000. Over 30 years at 4.37%, it’s about £159,000. Overpaying cuts it too.
Should I overpay my mortgage?
Overpaying means paying more than your monthly payment. It cuts the interest you pay and can mean you finish sooner.
Check your deal first. You could be charged if you pay more than your lender allows. Many lenders let you overpay up to 10% a year without a charge.
Does this include fees?
No. Mortgages can come with fees, such as a booking fee or an arrangement fee. You can sometimes add a fee to the loan, but then you pay interest on it too. Ask what each fee is and when it’s due.
Why might a lender’s figure be different?
Lenders may round differently, add fees to the loan, or work out interest in a slightly different way. A mortgage adviser must give you a document called a mortgage illustration. It shows the payments and the total cost, so you can check them.
What doesn’t this calculator cover?
Offset mortgages, part-repayment and part-interest-only mortgages, one-off overpayments, and the rent part of shared ownership. It also can’t tell you what a lender will offer you.