The main feature of a flexible mortgage is the facility to make extra payments when you have extra money. You may also be able to reduce monthly repayments or even take repayment holidays, although you will normally have to build up a reserve through making overpayments before this arrangement is allowed. Such mortgages are usually offered on a daily interest basis. Flexible mortgages usually provide a loan drawdown facility that allows you to borrow extra funds at a set predetermined rate.