What this calculator adjusts
The calculator starts with the monthly benefit at full retirement age from your statement. It applies the statutory early-claim reduction or delayed-retirement credit and an optional future COLA assumption.
Worked example
For someone born in 1960 or later, full retirement age is 67. Claiming at 62 reduces the full-retirement-age amount by 30%; waiting to 70 increases it by 24% before later COLAs.