What it is
The Social Security trust fund refers to two separate funds—the Old-Age and Survivors Insurance (OASI) Trust Fund and the Disability Insurance (DI) Trust Fund—that collectively hold the reserves for Social Security benefits. These funds are financed primarily through dedicated payroll taxes (FICA contributions) and their assets are invested in special interest-bearing U.S. Treasury securities.
The solvency of the Social Security trust fund is a persistent concern in political and economic discussions, with annual reports projecting its financial health over decades. Debates often focus on potential solutions to ensure long-term solvency, such as raising the retirement age, increasing payroll taxes, or adjusting benefit formulas. These discussions are critical for retirees and those planning for retirement.
Why it matters
The trust fund's solvency directly impacts the long-term reliability of your future Social Security benefits, a key component of retirement planning.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice