A common mistake is focusing only on the initial interest rate and overlooking arrangement fees, valuation costs, early repayment charges and the lender’s follow-on rate. Check the total cost over the deal period, not just the monthly payment, and consider whether the mortgage term and repayment type suit your circumstances. Avoid assuming you will definitely qualify for the advertised rate, as lenders assess your income, outgoings, credit history and deposit. For personalised guidance, consider speaking to a mortgage broker authorised by the FCA and check the lender’s full mortgage illustration.