SSDI paid $140.1 billion to disabled workers and their dependents in 2013 (according to the latest trust-fund data). By the end of that year spending outpaced receipts by $32 billion, and the balance of the program’s trust fund was a little more than $90 billion. Trust-fund reserves are expected to run out in late 2016.
Congress can reallocate payroll tax revenues from the Old-Age & Survivors Insurance trust fund to shore up the SSDI trust fund. But the Congressional Budget Office estimates that rebalancing tax revenue between the trust funds would cause the reserves of both to run out in 2030.