Find out how much your monthly mortgage repayments will be based on the property price, mortgage length and your deposit amount.
The property price is £300,000 and your mortgage deposit is £30,000, meaning the mortgage principal (amount borrowed) is £270,000, and your monthly repayment will be £1,426.
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| Interest rate change | Interest rate | Monthly mortgage payment | Change in monthly mortgage payments |
|---|---|---|---|
| -3% | 1% | £1,018 | -£408 |
| -2% | 2% | £1,144 | -£281 |
| -1% | 3% | £1,280 | -£145 |
| - | 4% | £1,425 | - |
| +1% | 5% | £1,578 | +£153 |
| +2% | 6% | £1,740 | +£314 |
| +3% | 7% | £1,908 | +£483 |
| +4% | 8% | £2,084 | +£659 |
| +5% | 9% | £2,266 | +£841 |
| Year | Interest paid | Principal paid off | Mortgage balance / Remaining debt |
|---|---|---|---|
| 0 | £0 | £0 | £270,000 |
| 1 | £10,683 | £6,418 | £263,581 |
| 2 | £10,421 | £6,680 | £256,901 |
| 3 | £10,149 | £6,952 | £249,948 |
| 4 | £9,866 | £7,235 | £242,712 |
| 5 | £9,571 | £7,530 | £235,182 |
| 6 | £9,264 | £7,837 | £227,345 |
| 7 | £8,945 | £8,156 | £219,188 |
| 8 | £8,613 | £8,488 | £210,699 |
| 9 | £8,267 | £8,834 | £201,865 |
| 10 | £7,907 | £9,194 | £192,670 |
| 11 | £7,532 | £9,569 | £183,101 |
| 12 | £7,142 | £9,959 | £173,141 |
| 13 | £6,737 | £10,364 | £162,777 |
| 14 | £6,314 | £10,787 | £151,989 |
| 15 | £5,875 | £11,226 | £140,763 |
| 16 | £5,417 | £11,684 | £129,079 |
| 17 | £4,941 | £12,160 | £116,919 |
| 18 | £4,446 | £12,655 | £104,263 |
| 19 | £3,930 | £13,171 | £91,092 |
| 20 | £3,394 | £13,707 | £77,384 |
| 21 | £2,835 | £14,266 | £63,118 |
| 22 | £2,254 | £14,847 | £48,271 |
| 23 | £1,649 | £15,452 | £32,818 |
| 24 | £1,020 | £16,081 | £16,737 |
| 25 | £364 | £16,737 | £0 |
- What's included in my monthly mortgage payment?
- Just the principal and interest shown in the results. Your actual monthly outgoing will be higher once you add buildings insurance, life insurance, or any lender arrangement fee. None of those are included here.
- What deposit size should I aim for?
- The bigger your deposit amount, the less you borrow, and lenders reward that with lower rates. The minimum most lenders accept is 5%, but rates drop noticeably at 10–15% and again at 25% on the deposit percentage. If you can reach 25%, you'll generally unlock the most competitive deals on the market.
- What's the difference between a fixed and variable rate mortgage?
- With a fixed rate, your monthly payment stays the same for the deal period (usually 2 or 5 years), no matter what the Bank of England does with rates. A variable rate (tracker or SVR) moves with the base rate or the lender's own rate, so your payments can rise or fall. Use mortgage rate with the rate table to stress-test both scenarios. Variable rates are often lower to begin with, but you take on rate risk in exchange.
- What are typical UK mortgage rates in 2026?
- Rates depend on your LTV ratio, the lender, and the deal type. As of early 2026, two-year fixed rates are broadly in the 4–5% range. Five-year fixes are currently sitting a little lower, the reverse of what was historically normal, reflecting expectations of further base rate cuts. Whatever you find here, cross-check with a broker or comparison site before applying.
- How is total interest calculated?
Multiply your monthly payment by the total number of payments, then subtract what you originally borrowed.
On a £200,000 mortgage at 4.5% over 25 years, the monthly payment works out at around £1,111. Over 300 payments that's £333,300 repaid, of which roughly £133,300 is interest. The mortgage payment table breaks that down year by year.
- What happens if interest rates change?
- On a fixed rate, nothing changes until the deal ends, at which point you remortgage or roll onto the lender's SVR. Use the rate table with the mortgage rate input to see how your payment shifts at different rates; it's a quick way to check whether you could still afford things if rates moved against you.
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