The different types of mortgage interest rates are listed above. The set period of time for how long the interest rate lasts if depend on your circumstances. For example, if you know that your circumstances may change or that you wish to pay off some or all of your mortgage or move house, it is important to be tied in for the most appropriate period time. The usual options are 2 years, 3 years, 5 years, 7 years and 10 years but these vary from lender to lender.
If your circumstances were to change during the specific tied in period, it may result in you having to pay early repayment charges.