A mortgage calculator for remortgaging can estimate your new monthly payments using the amount you owe, the proposed interest rate and the remaining or new mortgage term. For a more realistic comparison, include arrangement fees, valuation costs and any early repayment charge from your current lender, if applicable. The result is only an illustration, as the rate and deal available may depend on your circumstances, credit history and affordability assessment. Compare deals from FCA-authorised providers and consider speaking to a qualified mortgage adviser before applying.