Formula
Subtract the deposit from the price, calculate the fixed monthly repayment from loan amount, monthly rate and term, then estimate total interest over the term.
UK mortgage estimate
UK Mortgage Repayment Calculator
Estimate repayment mortgage cost from property price, deposit, interest rate and term. This is not affordability advice or a lender offer.
Estimated monthly repayment
Enter values to calculate Calculation basis date: 17 May 2026. Fixed-rate repayment mortgage estimate.Calculation Basis and Official Sources
Calculation basis date: 17 May 2026. Uses a standard fixed-rate repayment calculation with user-entered rate and term.
Before borrowing, check lender illustrations, MoneyHelper guidance, your broker, solicitor and regulated mortgage adviser.
Formula and Interpretation
How to read it
Use this to compare deposits, rates and terms. Real affordability and cost can differ because of fees, credit checks, product rules and future rates.
This calculator and its examples are for general information and rough estimation only. They are not legal, tax, accounting, payroll, lending, mortgage, investment, insurance, medical or other professional advice.
Rates, bands, thresholds, deductions, credits, local rules, employer settings, lender terms, product rules and personal facts can change. We do not guarantee that the calculations are accurate, complete, current or suitable for your situation.
UK note: this page is not legal, tax, accounting, payroll, mortgage, benefits, insurance or financial advice. Check GOV.UK, HMRC, your employer, lender, solicitor, accountant or qualified adviser before acting.
Before You Rely on the Result
Practical examples
Compare a 20% deposit with a 10% deposit by checking LTV.
Test 4.5%, 5.0% and 5.5% to see payment sensitivity.
Shorten the term to see monthly payment rise and total interest fall.
What this includes
- Loan amount
- Monthly repayment estimate
- Total interest and LTV estimate
What this does not include
- Lender affordability checks
- Fees, insurance, valuation and legal costs
- Variable rate changes, remortgage and early repayment charges
When to check official sources
Use lender illustrations and regulated mortgage advice before applying or signing a mortgage agreement.