The cost to refinance with another lender will depend on your situation. If you’re breaking a fixed interest rate agreement you may be charged an early repayment penalty or break fee to cover the lender’s losses. If you accepted a new customer incentive you might have to repay it if the clawback period still applies. You should also allow for your lawyer’s fee, a mortgage discharge fee, a valuation of your property for the new lender and any loan establishment fees they might charge.