What happens if you fail to start collecting social security after reaching age 70? If you finally notify social security at age 72, will they make a lump sum payment of the past benefits that you were previously eligible for?

Hi,

Social Security retirement benefits cannot be paid retroactively for more than 6 months prior to the month of filing. So, if you didn't file until age 72, you could only receive 6 months of back pay.

Best, Jerry