Mortgage Calculator
Work out your monthly mortgage repayment, total cost over the term and how loan-to-value affects what you'll pay. Uses the standard UK repayment-mortgage formula.
Monthly payment
£1,750.87
Loan: £315,000 · LTV: 90.0%
Rate comparison
| If rate is | Monthly | Total interest |
|---|---|---|
| 3.5% | £1,576.96 | £158,089 |
| 4.5% | £1,750.87 | £210,262 |
| 5.5% | £1,934.38 | £265,313 |
Side-by-side comparison at ±1% on your chosen rate.
How LTV affects your rate
Loan-to-value is the size of your mortgage as a percentage of the property price. Lenders offer noticeably better rates at lower LTV bands — a bigger deposit can shave 0.5–1.5% off your interest rate.
| LTV band | Deposit needed | Typical 2026 best-buy rate |
|---|---|---|
| 60% LTV | 40%+ deposit | ~4.0% |
| 75% LTV | 25%+ deposit | ~4.2% |
| 85% LTV | 15%+ deposit | ~4.4% |
| 90% LTV | 10%+ deposit | ~4.7% |
| 95% LTV | 5%+ deposit | ~5.2% |
Indicative best-buy rates as at May 2026. Actual rates vary by lender, credit profile and product term.
Related guides & tools
This calculator is for guidance only and is not a regulated mortgage illustration. It uses the standard repayment-mortgage formula and assumes a fixed interest rate for the full term. Get a real mortgage quote from a regulated broker or lender before making any decisions. Last updated 2026-05-22.