The decision to remortgage should be weighed against several potential costs. These include early repayment charges from your current lender, especially if you are in the middle of a fixed-rate term. Legal, valuation, and potential arrangement fees with the new lender might also apply. Additionally, if you are consolidating debts through remortgaging, consider the long-term implications of extending short-term debts over the period of a mortgage. Always calculate these costs to ensure that remortgaging will be financially beneficial in the long term.