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Omnibus Appropriation

A single massive spending bill that combines multiple regular appropriations bills, passed late in the budget cycle to avoid a government shutdown.

How It Works

An omnibus appropriation packages two or more of the 12 regular appropriations bills into a single legislative vehicle, typically passed after the fiscal year has already begun when Congress has run out of time for separate bills. A "minibus" is a smaller package (usually 2-4 bills), while a true omnibus combines most or all of the 12. The Consolidated Appropriations Act of 2023 (enacted December 29, 2022) is a recent example: it combined all 12 regular FY2023 appropriations bills plus supplemental disaster and Ukraine aid into a 4,155-page, $1.7 trillion statute enacted 90 days into the fiscal year. Omnibuses are controversial because they present members with a binary take-or-leave choice on trillions of dollars and thousands of pages, limiting floor amendments and scrutiny. They also tend to include policy riders (unrelated legislative changes) and earmarks that would face more resistance in standalone bills. Defenders argue omnibuses are the only realistic way to fund the government when political polarization blocks stand-alone appropriations, and they at least provide the full-year certainty that agencies and contractors need to plan. For federal contractors the omnibus timing creates a compressed award cycle: once enacted in late December or January, contracting officers must obligate roughly 9 months of funding in the remaining 6-9 months of the fiscal year, driving surge volume in late summer (the "use it or lose it" effect before September 30 expiration of annual appropriations). USASpending.gov transaction data shows a consistent Q4 (July-September) obligation surge of 30-40% above the yearly average in years with late omnibus enactment, with the final two weeks of September often producing the single largest concentration of contract awards of the year.

Related Terms

  • Appropriation, A law passed by Congress that authorizes federal agencies to spend a specific amount of money for a specific purpose during a defined period.
  • Continuing Resolution (CR), A temporary funding measure passed by Congress when it fails to complete the annual appropriations process, keeping the government funded at prior-year levels.
  • Supplemental Appropriation, Additional funding enacted outside the regular annual appropriations process to address emergencies, disasters, wars, or unforeseen needs.

About This Definition

This definition is part of the TaxDollarData Federal Spending Glossary, 46 terms explaining how the U.S. government spends taxpayer money. All definitions are written in plain language for taxpayers, journalists, contractors, and researchers.

this entity is one of the U.S. federal government spending concepts that recurs across this site. The definition above is the technical answer; the paragraphs below add the practical context for how the concept connects to the USASpending.gov federal awards data data behind every per-entity page on the site.

In the USASpending.gov federal awards data data, this concept shapes one or more of the fields that drive the per-entity grades and rankings on this site. The methodology page describes which fields feed into which output; this glossary entry documents the underlying term.

Source: USAspending.gov, 2026.