There are two versions of the interactive calculator: one works on IBM PC's
and compatibles running recent versions of the Microsoft Windows operating system,
including Windows 7, Windows 8, or Windows 10.
It is possible that it may work on older versions of Windows, but we have
not been able to confirm this ourselves. The
other version runs under older versions of the Mac OS.
The benefit can be computed for either a new entitlement
or a recomputation after initial entitlement. Several pages of output are printed in the
application window, with summary results on the first page.
Later pages display details of the benefit computation.
The calculator can produce a benefit for any historical case from the first
Social Security benefit paid (1940). It can also produce a projected benefit,
based on standard or user-specified assumptions, through 2095.
Although we have tried to be as accurate as possible, this is not the same
calculator as is used for official Social Security calculations and it may
produce results that differ from an official calculation. In particular, for primary
benefits, we have made approximations for pre-1965 benefits and for the frozen minimum PIA,
and we only partially take account of disability non-exclusion computations and the
disability guarantee computation. In addition, the calculator is not set up to estimate
dependent or survivor benefits where the dependent or survivor also receives benefits
based on their own record, or survivor benefits where the benefit is affected by
the worker's retired worker benefit prior to death. Based on experience to date,
this calculator matches the official calculations very well, with most differences
due to late posting of earnings to the earnings record, or different assumptions
for projected benefits.
The 2021.1 version, which takes all amendments to the law, and
automatic adjustments, through 2020 into account, is now
available at this web site. It updates the economic data with the new
automatic adjustments announced in the fall of 2020.