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Mortgage Repayment Calculator
Work out your monthly mortgage repayment and the total interest over the term, and compare a repayment mortgage with interest-only. Change the price, deposit, rate and term to match your plans.
Capital and interest only. Excludes lender fees and insurance. Estimate to help you plan, not a mortgage offer or advice.
- Monthly payment
- £1,751
- Interest in your first payment
- £1,181
- Loan-to-value
- 90%
- Total of 300 payments
- £525,262
How much would a mortgage cost a month?
On a repayment mortgage over 25 years at 5.0%, an £80,000 loan costs about £468 a month, £100,000 costs about £585, and £200,000 costs about £1,169. Those are the capital and interest only. The table below runs the common loan sizes across the rate band lenders have been quoting, so you can read your own figure off it without typing anything.
| Loan | 4.5% | 5.0% | 5.5% |
|---|---|---|---|
| £30,000 | £167 | £175 | £184 |
| £40,000 | £222 | £234 | £246 |
| £50,000 | £278 | £292 | £307 |
| £60,000 | £333 | £351 | £368 |
| £70,000 | £389 | £409 | £430 |
| £80,000 | £445 | £468 | £491 |
| £90,000 | £500 | £526 | £553 |
| £100,000 | £556 | £585 | £614 |
| £120,000 | £667 | £702 | £737 |
| £140,000 | £778 | £818 | £860 |
| £150,000 | £834 | £877 | £921 |
| £200,000 | £1,112 | £1,169 | £1,228 |
| £250,000 | £1,390 | £1,461 | £1,535 |
| £300,000 | £1,667 | £1,754 | £1,842 |
| £400,000 | £2,223 | £2,338 | £2,456 |
Monthly payment on a repayment mortgage over 25 years. The calculator above produces every row, so the table cannot drift away from the tool. The loan is what you borrow, so it is the property price minus your deposit, not the price. Read across to the rate nearest your own offer.
What a shorter term does to the payment
The term is the other lever. A shorter one raises the monthly payment and cuts the total interest sharply, because you are paying interest for fewer years. At 5.0%, a £50,000 loan costs £530 a month over 10 years against £292 over 25, but the 10-year version hands over £24,049 less in total.
| Loan | 10 yrs | 15 yrs | 20 yrs | 25 yrs | 30 yrs |
|---|---|---|---|---|---|
| £30,000 | £318 | £237 | £198 | £175 | £161 |
| £40,000 | £424 | £316 | £264 | £234 | £215 |
| £50,000 | £530 | £395 | £330 | £292 | £268 |
| £60,000 | £636 | £474 | £396 | £351 | £322 |
| £70,000 | £742 | £554 | £462 | £409 | £376 |
| £80,000 | £849 | £633 | £528 | £468 | £429 |
| £90,000 | £955 | £712 | £594 | £526 | £483 |
| £100,000 | £1,061 | £791 | £660 | £585 | £537 |
| £120,000 | £1,273 | £949 | £792 | £702 | £644 |
| £140,000 | £1,485 | £1,107 | £924 | £818 | £752 |
| £150,000 | £1,591 | £1,186 | £990 | £877 | £805 |
| £200,000 | £2,121 | £1,582 | £1,320 | £1,169 | £1,074 |
| £250,000 | £2,652 | £1,977 | £1,650 | £1,461 | £1,342 |
| £300,000 | £3,182 | £2,372 | £1,980 | £1,754 | £1,610 |
| £400,000 | £4,243 | £3,163 | £2,640 | £2,338 | £2,147 |
Monthly payment at 5.0% on a repayment basis. Lenders cap the term by your age at the end of it, so the longest column is not open to every borrower.
Where the rates in these tables come from
The Bank of England publishes the average rate lenders were advertising each month, as a weighted average across banks and building societies. In August 2026 that was 4.92% on a two-year fix at 75% loan-to-value, 4.78% on a five-year fix at the same LTV, and 5.16% on a two-year fix at 90%. Across 2026 those series ran between 3.93% and 5.46%, which is why the table above is printed at 4.5%, 5.0%, 5.5% rather than at one number that would be stale within a month.
Source: Bank of England quoted household interest rates, series IUMBV34, IUMBV42 and IUMB482, read 11 September 2026. These are advertised rates on standardised products, not an offer · your own rate depends on a lender assessing your circumstances, and a bigger deposit usually buys a lower one. Work out which band you fall in with the loan-to-value calculator.
How repayments are worked out
Your loan is the property price minus your deposit. Each month you are charged interest on what you still owe. On a repayment mortgage your payment also chips away at the balance, so early on most of it is interest and later on most of it is capital. The calculator spreads this evenly across the term to give a level monthly figure.
For the full picture, including repayment versus interest-only and what happens when rates change, read how mortgage repayments work.
Two costs sit around the mortgage itself: work out the price a lender might stretch to with the mortgage affordability calculator, and remember stamp duty is a separate cash cost due soon after you complete.
Common questions
- How much would an £80,000 mortgage cost a month?
- About £468 a month on a repayment mortgage over 25 years at 5%, or £445 at 4.5% and £491 at 5.5%. That covers capital and interest only, so add any lender fee and buildings insurance on top. The table above lists the common loan sizes across the same rate band.
- How much are the repayments on a £100,000 mortgage?
- On a repayment basis over 25 years, about £585 a month at 5%. Shorten the term to 20 years and it rises to £660; stretch it to 30 and it falls to £537, though you pay interest for five more years to get there.
- How much would a £50,000 mortgage cost over 10 years?
- About £530 a month at 5% on a repayment basis, against £292 a month if you spread the same loan over 25 years. The shorter term costs more each month but around £24,049 less in total interest.
- What is the difference between repayment and interest-only?
- On a repayment mortgage your monthly payment covers both interest and a slice of the loan, so the balance falls to zero by the end of the term. On interest-only you pay just the interest each month and still owe the full amount at the end, which you have to repay another way.
- What changes my monthly payment the most?
- The loan size, the interest rate and the term. A bigger deposit cuts the loan and the rate band. A longer term lowers the monthly payment but increases the total interest you pay over the life of the mortgage.
- Does this include fees or insurance?
- No. This shows the capital and interest only. Lenders may add arrangement fees, and you will usually need buildings insurance, so your real outgoing can be higher.
- Can I use this for a buy-to-let mortgage?
- Yes, for working out the monthly cost on a repayment basis. Many buy-to-let mortgages are interest-only, where you pay just the interest and repay the loan another way, so switch the calculator to interest-only to see that figure. It estimates the payment only and is not an affordability check or a lending offer.
- Is this a mortgage offer or advice?
- No. It is an estimate to help you plan. Your actual rate and payment depend on a lender assessing your circumstances. Speak to a mortgage adviser before you commit.
About this calculator
Uses the standard mortgage amortisation formula. Figures are rounded and exclude lender fees, so treat them as a guide. Your real rate and payment depend on a lender assessing your circumstances. The rates the tables are printed at come from the Bank of England quoted-rate series, not from us. An estimate to help you plan, not a mortgage offer or financial advice. Last updated September 2026.