Longman Dictionary of Contemporary English
Wikipedia
Family Credit was a United Kingdom social security benefit introduced by the Social Security Act 1986 for low paid workers with children. It replaced Family Income Supplement
The benefit was designed for families with children where at least one person is working more than 24 hours a week, on average. This represented an exclusion with entitlement to Income Support. The work should be intended to last at least five weeks.
Usage examples of "family credit".
Sayuri Nakada was probably running on family credit, and when the plot failed and the sun rose she might drag the entire Nakada family down with herat least, I thought so for a minute or two, but then I changed my mind.
If they didn't get you that way, then along came a smooth tongued man to offer a loan on the basis of your family credit.
Quilp, and, besides, it was not supporting the family credit to encourage the idea that she had married a man whom nobody else would have.
In the middle of the room, where just a moment ago there had been a display of Family Credit leaflets, the Glass Mountain appeared, blue and sparkling.
Hadn't I been a good fish man to him, given his family credit when he couldn't pay?