A mortgage calculator can give you an initial estimate of potential monthly payments and borrowing, based on your deposit, income, debts, mortgage term and an assumed interest rate. Try different deposit sizes and terms, but remember the result is illustrative and may not reflect a lender’s affordability checks, credit assessment or stress testing. Budget for costs such as legal fees, surveys, valuation fees and potentially Stamp Duty, then check the latest guidance on GOV.UK. For a more tailored view, consider speaking to a mortgage adviser who is authorised by the FCA before applying.