# Trust Funds **Federal accounts that earmark dedicated revenues for specific programs** — most importantly [[Social Security]] (the OASI and DI funds), [[Medicare]]'s Hospital Insurance fund, and the Highway Trust Fund. A trust fund collects a dedicated tax, pays out benefits, and "holds" any surplus as special-issue Treasury securities. The concept is widely misunderstood, and the misunderstanding is politically useful. ## What a trust fund actually is - The surplus is **not a vault of cash**. When Social Security ran surpluses, the money was lent to the rest of the government (in exchange for Treasury IOUs) and spent. The trust fund's "balance" is a claim on future general revenue, backed by the government's full faith and credit — real as a legal claim, but not a pile of saved money. - **"Trust-fund exhaustion"** means incoming dedicated taxes would no longer cover full scheduled benefits — *not* that the program goes to zero. After the projected exhaustion dates (Social Security mid-2030s, Medicare HI early-mid 2030s), incoming payroll taxes would still fund the large majority of benefits. ## The RWKB angle The trust-fund framing drives two opposite distortions. One side warns the program is "**going bankrupt**" (implying it vanishes) to justify cuts or privatization; the other treats the IOUs as a fully funded guarantee. Both miss the real mechanics: it's a pay-as-you-go transfer dressed in accounting that *looks* like savings. Reading the trust funds honestly cuts through the [[Social Security]] and [[Medicare]] solvency fights. See [[On-Budget vs Off-Budget]] for how the funds sit in the larger budget. ## Related - [[Social Security]] · [[Medicare]] · [[On-Budget vs Off-Budget]] - [[Discretionary vs Mandatory Spending]] · [[Budget Hub]]