# Obligation The moment federal money is legally committed — the hinge of the whole pipeline traced at [[How Federal Money Moves]]. An obligation is a definite legal liability: signing a contract, awarding a grant, issuing a purchase order, entering an employee pay period. It is not the appropriation (permission, upstream) and not the outlay (cash, downstream — see [[Outlays vs Budget Authority]]); it is the binding promise in between, and it is the number that federal budget law actually polices. The recording statute (31 U.S.C. 1501) says an obligation may be booked only when there's a documented, legal commitment — no padding the books to bank money. ## Why the obligation is the legal unit Every hard limit in appropriations law bites at the moment of obligation, not payment: the [[Antideficiency Act]] forbids obligating in excess of the appropriation or [[Apportionment]]; the purpose statute (31 U.S.C. 1301) and time limits are tested against when and why the obligation was incurred. The **bona fide needs rule** requires that an obligation serve a genuine need of the appropriation's period of availability — no obligating this year's money for next year's needs just because it's expiring. USAspending.gov, the main public spending ledger, reports obligations. ## The account lifecycle Fixed-period money moves through three states: 1. **Unexpired** — available for new obligations during its window (one-year, multi-year; no-year money never expires). 2. **Expired** — window closed; for five years the account can still pay out and adjust *existing* obligations, but accepts no new ones. 3. **Canceled** — on September 30 of the fifth expired year, the account closes and the balance is canceled for any purpose (31 U.S.C. 1552). **Deobligation** — releasing a booked obligation (a canceled contract, a grant that underran) — returns funds to the account, reusable only if the account is still unexpired. ## The RWKB angle "Unobligated balances" is the phrase to watch. Multi-year money sitting mid-pipeline is the normal physics of shipbuilding contracts and infrastructure grants — but it reads as "unspent billions," which makes it the favorite target of rescission packages and [[DOGE]]-style savings claims (see [[DOGE Claimed vs Verified Savings]]). Conversely, a program can be killed without repealing anything by preventing obligation — the [[Apportionment]] slow-walk — until the clock runs out and the money expires on its own. Both moves exploit the gap between the political vocabulary ("spending") and the legal one (obligation). ## Related - [[How Federal Money Moves]] · [[Outlays vs Budget Authority]] · [[Antideficiency Act]] · [[Apportionment]] - [[Appropriations Process]] · [[Fiscal Year]] · [[Rescission and Impoundment]]