Capital and interest
This is the simplest type of mortgage. The payments you make to the lender every month pay off both the capital and the interest from the loan. Provided you keep up the payments, you are guaranteed to pay off the loan by the end of the term agreed (usually 25 years).
The lender calculates your monthly repayments depending on the amount borrowed, how long for, the interest rate and how the rate you have chosen is set.