The Maximum Family Benefit ranges between 150% and 180% of the Primary Insurance Amount.

FORBES: The Social Security Survivor Benefit - Part 2

The way that the maximum benefit for a particular year is calculated is based upon the maximum wage base for the year, as well as the applicable COLAs that would apply after the PIA ( Primary Insurance Amount) has been calculated for that individual.

FORBES: How Is The Maximum Social Security Benefit Calculated?