Lenders often charge an arrangement fee when you select a particular product. The cost of these can be a fixed amount or sometimes a percentage of the loan amount. The arrangement fee can be paid on application and added to the loan on completion.
The main reason to remortgage your home is to save money on your monthly payments. There are a few instances when you should not remortgage. If you would have to pay a penalty or early repayment charge for leaving your current lender or if interest rates have gone up.