UK Mortgage Calculators
Start with the figures, then decide whether an adviser conversation would help. These calculators are arranged to help you test repayment, borrowing and remortgage scenarios before sharing details.
Mortgage Repayment Calculator
Test how price, deposit, rate and term change the monthly estimate.
Calculate repayments →How Much Can I Borrow?
Build a borrowing range from income, employment and deposit assumptions.
Estimate borrowing →Remortgage Calculator
Compare your current payment with a possible new-rate scenario.
Check remortgage options →Buy-to-Let Yield Calculator
Review gross yield, net yield and simple cash-flow assumptions.
Calculate rental yield →Mortgage Overpayment Calculator
See how overpayments could shorten your term and save interest.
Estimate overpayment savings →Self-Employed Mortgage Calculator
Borrowing estimate for sole traders, contractors and Ltd directors.
Speak to a broker →Stamp Duty Calculator
Estimate SDLT for England and NI, including first-time buyer relief and additional-property surcharge.
Calculate Stamp Duty →Need help comparing real mortgage products?
Our calculators give estimates only. Lender-specific products, rates and eligibility come from an authorised mortgage adviser.
Request a callbackSuggested next steps
Related calculators and guides
Numbers first, adviser review second
Smarter Mortgage Quotes starts with clear estimates so you can understand the figures before asking for a callback. The estimates do not confirm eligibility, rates, fees or suitability.