The federal fiscal year runs from October 1 through September 30, crossing the boundary between calendar years. That is why a federal budget or spending total labeled FY 2026 does not describe the twelve months from January through December 2026. It covers October 2025 to September 2026. Knowing the span helps readers line up federal figures with economic data and news stories, and prevents a comparison between periods that only look alike because both carry the same year number.
The fiscal year starts in October
The federal government’s fiscal year begins October 1 and ends September 30 of the next calendar year. USA.gov describes the annual budget as covering the next fiscal year, with the federal budget process beginning well before that period takes effect. The budget calendar is built around this fiscal year, not the calendar year used for birthdays, annual household budgets or many business reports. USA.gov
A fiscal-year label names the year in which the period ends. FY 2026 therefore starts October 1, 2025, and concludes September 30, 2026. The label is a compact accounting convention, not a claim that every month of 2026 is included. This distinction is especially useful when a report appears early in a calendar year and discusses federal plans or totals for a fiscal year that has not yet begun. USA.gov
Budget decisions follow that calendar
The annual federal budget includes mandatory spending, discretionary spending and interest on the debt. USA.gov describes mandatory spending as funding required by law, discretionary spending as federal agency funding set each year by Congress, and interest as a separate part of the annual budget. The budget process includes agency requests, a presidential proposal, congressional work on funding bills and the president’s signature or veto. USA.gov
Those decisions and the money they cover may refer to a fiscal year crossing two calendar years. A proposal for FY 2026, for instance, concerns the period beginning in October 2025 and ending in September 2026. A calendar-year report covering January through December 2026 overlaps the final nine months of that fiscal year and the first three months of FY 2027. The labels alone do not reveal that overlap; the dates do.
Outlays and obligations mark different stages
When reading spending totals, check what the measure counts as well as which period it covers. Treasury’s federal spending guide uses “outlays” for money actually paid by the government. An obligation is a commitment to spend, such as when an agency signs a contract or awards a grant; it may lead to payment immediately or later, and not every obligation has already become an outlay. U.S. Department of the Treasury
A headline about money obligated is therefore not automatically comparable with one about money paid out, even if both concern the same fiscal year. The Treasury guide says its spending overview presents outlays, while other sources such as USAspending may show obligations. Readers should check both the accounting measure and the date range before treating two totals as evidence of a change in actual cash payments. U.S. Department of the Treasury
Align periods before comparing
A practical check is to write the start and end dates beside each year label. FY 2026 means October 1, 2025, through September 30, 2026. Calendar year 2026 means January 1 through December 31, 2026. The periods share nine months, but each also includes three months absent from the other. A comparison of annual totals can thus mix different stretches of economic activity unless the periods are aligned or the mismatch is made clear.
Treasury’s guide says fiscal year-to-date spending is measured since October and is updated monthly using the Monthly Treasury Statement. A fiscal-year-to-date figure is a partial-period total, not a full-year result. When comparing it with the same period in another year, verify the month cutoff and whether the displayed figure is outlays or obligations. These small checks make federal budget data easier to read alongside calendar-year reporting without implying that unlike periods are directly equivalent. U.S. Department of the Treasury
Sources & further reading
- Federal budget process ↗USA.gov
- Federal spending guide ↗U.S. Department of the Treasury
