Mortgage repayment calculator
Your monthly payment, and the payment a lender checks you could still manage.
Starts at the average two-year fix, 5.13%, from the Bank of England (quoted household interest rates, IADB), checked 28 October 2026.
On £200,000 at 5.13% over 30 years, repayment basis.
The same loan at 7.58%, our estimate of a typical stress rate. That’s £320 a month more. Lenders want to see your budget could cover it.
In the first two years you’d pay £20,234 in interest and clear £5,916 of the loan.
Early on, most of each payment is interest. The share going to the loan grows over time.
If the rate never changed, you’d repay £392,252 over 30 years.
In practice the rate will change when each fix ends, so treat this as an illustration.
Repayment mortgage, monthly payments, fees not included. The stress rate is the Bank of England average revert-to rate plus one point, a simplification of the affordability rules. How we work it out. This is information, not advice. Why lenders test at a higher rate.