Article preview: It’s the 40th anniversary of Child Benefit this month. The most widespread state benefit for working-age families was first introduced on 2nd April 1979. Today, around seven million families are in receipt of Child Benefit, which is paid based on the number of eligible children in a household. Families receive Child Benefit when they have one or more children under the age of 16, or under age 20 if they are in approved education or training. There are two rates of Child Benefit paid; £20.70 a week for the eldest or only child, and then £13.70 per child per week for additional children.