Updated April 2026 · USAspending.gov data
Federal Spending Guides
The federal government obligated $529.6B across 2,005 contractors in FY2024. These guides explain how that spending works — how a contract gets awarded, who the largest recipients are, and how to read public procurement records yourself. Every figure links back to USAspending.gov, the official source mandated by the DATA Act.
Why Read These Guides
Federal contracting is a $700B-plus market that operates on its own vocabulary — obligations, outlays, ceilings, IDIQs, sole-source, set-asides, PSCs, NAICS codes, micropurchase thresholds. Most reporting on government spending hits the same handful of contractor names (Optum Public Sector Solutions, Inc., Lockheed Martin Corporation, Mckesson Corporation) without explaining what those companies actually do for the government or why the dollar totals look the way they do. The guides on this site fill in that context using only public records.
Each guide pairs narrative with live data from this site. When a guide says "the top five defense primes capture roughly 30% of DOD spending," that statement is computed from the current USAspending.gov dataset rather than asserted from a press release. Numbers are footnoted to SAM.gov registrations, the Federal Procurement Data System, and federal agency reports.
Browse the Guides
Where Do Your Tax Dollars Go? A Complete Federal Spending Breakdown
Follow a dollar from your paycheck to its final destination, defense contractors, Medicare providers, Social Security recipients, and interest on the national debt.
Read guide →How It WorksHow Government Contracts Work: From Solicitation to Award
The step-by-step process of how the federal government buys goods and services, competitive bidding, evaluation criteria, award types, and how to track the money.
Read guide →Deep DiveThe Biggest Government Contractors: Who They Are and What They Do
The top 20 federal contractors receive over $200 billion per year. Who are they, what do they provide, and how did they grow so large?
Read guide →Where to Verify the Numbers
Three federal sites cover everything cited in these guides. USAspending.gov is the master record of every federal award; you can search by contractor, agency, location, or category and download CSVs of the underlying records. SAM.gov is the contractor registration system — every entity that does business with the government must register here, and each gets a Unique Entity ID (UEI) that ties their records together. FPDS hosts the procurement data feed that ultimately populates USAspending and contains additional procurement-specific fields useful for advanced analysis.
Industry research tools like GovTribe, Bloomberg Government, and Deltek GovWin layer paid analysis on top of the same federal records but do not replace the primary sources. For citation purposes, point to the federal sites; the third-party tools are useful for workflow, not authority.
Frequently Asked Questions
Who are these guides written for?
Anyone trying to understand how the federal government spends taxpayer money — journalists tracing a contract back to its agency, students researching the procurement process, contractors mapping the competitive landscape, citizens following DOGE actions, or analysts looking for trends. Guides assume zero prior knowledge of federal procurement and link out to USAspending.gov, SAM.gov, and the Federal Procurement Data System for primary sources.
How is "federal contract spending" different from the federal budget?
The federal budget covers everything Congress appropriates — Social Security, Medicare, defense pay, interest on debt, and contracts. Contract spending is just the procurement slice: dollars the government pays outside vendors for goods, services, research, and construction. It is roughly $700B–$800B per year out of a roughly $6T total federal budget. Guides on this site focus on the procurement slice because that is what USAspending.gov tracks at the award level.
How accurate is this data?
Every number traces back to the federal record on USAspending.gov, which is the same dataset used by Congress, the GAO, and federal inspectors general. Two known limits: (1) classified contracts in defense and intelligence appear with limited detail, and (2) subcontractor flows are only partially tracked, so a prime contractor's reported obligations may include funds that ultimately flow to subcontractors who do not appear in the top-level data.
How often are guides refreshed?
Guide narratives are updated at least quarterly; the underlying contractor and agency tables they reference refresh whenever USAspending.gov publishes a new dataset (the federal source publishes daily; we pull the latest at each refresh). The last full refresh was April 2026. Specific FY2024 figures appear inline so readers can confirm the period covered.
Where can I verify the numbers myself?
Every guide cites the underlying record. To verify: open USAspending.gov, search the contractor or agency name, and compare obligation totals. Vendor identity can be cross-checked at SAM.gov using the Unique Entity ID. Industry classification can be checked against the PSC hierarchy at fpds.gov.
Methodology
All figures are sourced from USAspending.gov. Industry rollups follow the PSC hierarchy from the Federal Procurement Data System. Recipient identity is reconciled to SAM.gov UEI registrations so subsidiaries that file separately can roll up to the parent contractor when the federal record links them. Read the full methodology.
Source: U.S. federal government, USAspending.gov, SAM.gov. Data is public domain. Cite as: "TaxDollarData guide, FY2024. Data: USAspending.gov."
Last updated 2026-04-09 · covering 2,005 contractors and $529.6B in obligations.