The Halifax mortgage savings boost, commonly known as the Family Boost Mortgage, is an innovative product designed to help first-time buyers get onto the property ladder. Instead of the buyer providing an upfront deposit, a family member supports by depositing 10% of the property's value into a Halifax family boost fixed savings account. This deposit acts as security for the mortgage. The family member's savings earn interest during the mortgage term, and after a set period, typically three years, the savings are returned to the family member, provided the mortgage repayments have been maintained.