Parents who are old enough to receive Social Security retirement benefits and still have a child under 18 may be eligible for an additional Social Security benefit for that child. This benefit, sometimes called the "Late-in-Life-Baby Bonus," allows a dependent child to receive up to 50% of the eligible parent's Primary Insurance Amount (PIA) monthly. For example, a father with a $2,800 monthly PIA could see his 12-year-old child receive $1,400 per month, totaling $100,800 over six years, without reducing the father's own retirement check.

This benefit continues until the child turns 18, or 19 if still in high school full-time, and can extend for life if the child became disabled before age 22. The family maximum benefit caps the total amount Social Security can pay on one worker's record, including auxiliary checks to a child or spouse, but typically leaves room for both a child and spousal check. Furthermore, a spouse caring for a child under 16 can also collect a spousal benefit on the worker's record, even if the spouse is much younger and not yet at retirement age.

While this benefit is not widely advertised by Social Security, it has become increasingly relevant as the number of children born to women aged 45 and older has soared 450% since 1990. Only about 1% of Social Security beneficiaries in January were children of retired workers, collecting an average of $919.20 per month. Some financial experts suggest that claiming Social Security earlier to unlock this dependent child benefit, even if it means a reduced personal retirement check, could be a financially advantageous strategy for families, potentially helping to save for college or cover childcare costs. However, claiming early does permanently reduce the parent's own benefit.