Yes, but it will depend on the terms and conditions of your existing mortgage – and may work out expensive. Many mortgages have an early repayment charge , which can mean it’s cost prohibitive to remortgage before the end of the introductory period. But even if you’re locked into a deal, you don’t have to wait before looking at alternatives. From three to six months before the deal expires, you can have a remortgage in place ready to go.