Social Security OASI Trust Fund Reserves Projected to Exhaust by 2035

US payroll tax revenues have fallen short of OASI outlays since 2021, with the 2024 report recording a $160 billion deficit in 2025 that widens to $393 billion by 2033. Reserves stand at $2.56 trillion but decline each year as Baby Boomer retirements accelerate and the worker-to-beneficiary ratio drops below 2.8 to 1. Treasury special-issue securities are redeemed to cover gaps, transferring the shortfall to general revenues or new borrowing.

Demographic structure drives the outcome more than policy rhetoric. Fertility rates below replacement and rising life expectancy increase the retiree share of the population across OECD states. Smaller Nordic systems sustain higher replacement rates only because working-age cohorts remain larger relative to beneficiaries. The US scale, with 71 million current recipients and 14 million fully dependent on checks, magnifies the fiscal exposure when the dependency ratio tightens.

Primary records show Congress has adjusted the retirement age and payroll tax cap in past cycles but avoided sustained revenue increases or means-testing since 1983. Without new legislation, the automatic reduction at depletion date becomes binding. Options on record include raising the cap, increasing the 12.4 percent combined rate, or indexing benefits to prices rather than wages.

The next measurable checkpoint arrives with the 2025 Trustees Report and any debt-ceiling or budget reconciliation package in the 119th Congress.