A common mistake is focusing only on the headline interest rate and overlooking arrangement fees, valuation costs, early repayment charges and the total cost over the deal period. Some borrowers also wait too long to review their options, leaving them to move automatically onto a lender’s standard variable rate when their fixed or tracker deal ends. Check the mortgage’s overall cost, fees, flexibility and likely monthly payments if rates change, rather than comparing rates alone. A mortgage adviser authorised by the FCA can help you assess suitable options based on your circumstances.