UK Mortgage Calculators For Homebuyers, Homeowners And Landlords
How Much Can I Borrow? Mortgage Calculator
See how much you could borrow for a mortgage from your income and outgoings, with an indicative lending range to take to a broker.
Open CalculatorMortgage Repayment Calculator
Work out your monthly mortgage repayments by loan amount, interest rate and term, on a repayment or interest-only basis.
Open CalculatorStamp Duty Calculator 2026
Estimate the stamp duty (SDLT) on your purchase at current 2026 rates, including the surcharge on additional and buy-to-let property.
Open CalculatorBuy-to-Let Mortgage Calculator
Run the rental stress test lenders use to size a buy-to-let mortgage, with rental cover and loan-to-value cross-checks for landlords.
Open CalculatorLoan-to-Value (LTV) Calculator
Turn your property value and deposit into your loan-to-value ratio and the rate band it falls in, plus the deposit needed to reach the band below.
Open CalculatorCheck Which Figure Matters for You?
Check Your Eligibility• This information is a guide only and should not be relied on as a recommendation or advice that any particular mortgage is suitable for you.
• All mortgages are subject to the applicant(s) meeting the eligibility criteria of lenders.
• Make an appointment to receive mortgage advice suitable for your needs and circumstances.
FAQs
1. Which mortgage calculator should I use first?
Start with the calculator that matches the decision you are making now. Borrowing range usually comes first for buyers, monthly payments for remortgagers, and rental stress testing for buy-to-let cases.
2. Are mortgage calculator results accurate?
They are useful estimates, but they are not tailored lending decisions. The final outcome depends on lender criteria, affordability, credit profile, property details, fees and supporting documents.
3. Is a decision in principle the same as a mortgage offer?
No. A decision in principle is an early indication based on initial information. A formal mortgage offer comes later after fuller checks, underwriting and valuation.
4. Can I use these calculators for remortgaging?
Yes. They can be useful for estimating repayments, checking loan-to-value and reviewing whether additional borrowing may be realistic before you compare the available routes.
5. Does a lower rate always mean a better deal?
Not necessarily. Fees, incentives, early repayment charges, flexibility and the overall cost over time can all affect which option looks stronger.
6. Are buy-to-let calculator results the same as lender stress tests?
No. They are indicative only. Each lender can apply different stress rates, rental cover requirements, loan-to-value limits and underwriting rules.
7. Do expat and seafarer cases need a different approach?
Often, yes. Residency, income structure, country of residence, contract type and document evidence can all affect lender choice and outcome.