How U. S. Government Contracts Work: Spending, Oversight and Red Flags

RED TARGET TIPIKOR / U. S. Investigations & Government Accountability

Key Takeaways

In fiscal year 2024, the federal government committed roughly $755 billion to contracts, a decrease of about $22.5 billion from fiscal year 2023 after adjusting for inflation, according to the U. S. Government Accountability Office (GAO).

Federal procurementis governed by the Competition in Contracting Act and the Federal Acquisition Regulation(FAR,,,which require agencies to pursue full and open competition unless a narrow, documented exception applies.

Oversight is layered: contracting officers, auditors, agency inspectors general(IGs,,,GAO, and the Department of Justice each have distinct roles in checking how contract dollars were spent.

In fiscal year 2024, federal agencies reported about $162 billion in estimated improper payments across 68 programs — payments made incorrectly or that could not be documented — although improper payments are not the same as fraud(GAO).

The raw material for public scrutiny is free and public: SAM. gov entity registration, USAspending. gov award data, FPDS records, agency OIG reports, and FOIA requests can each reveal a different slice of the contracting picture.

The United States government buys an enormous range of goods and services every year: jet fighters, cybersecurity software, medical supplies, janitorial services, and consulting advice. Those purchases do not happen by accident. They are the product of a procurement system decades in the making, designed — on paper at least — to channel taxpayer dollars toward the best value at the lowest risk of waste, fraud, and abuse. Understanding how that system is supposed to work is the first step toward spotting where it breaks down. This explainer walks through the fundamentals of federal contracting: what a contract is, how awards are made, where the information lives, how much money is involved, how oversight works, and what warning signs deserve a closer look. It is grounded entirelyin public primary sources;every figure is labeled with the fiscal year and sourceit comes from.

What Is a U. S. Government Contract?

A U. S. government contract is a legally binding agreement between a federal agency(the buyer)and a private company, nonprofit, or other entity(the contractor(. The government promises to pay for goods or services, andthe contractor promises to deliver them under terms spelled out in detail: price, schedule, specifications, data rights, security requirements, invoicing procedures, and remedies for the government ifthe contractor fails to perform. Because public money is involved, federal contracts are subject to far more statutory and regulatory constraint than ordinary commercial agreements.

Federal contracts come in several basic payment types, each with different risk profiles:

Firm-fixed-price contracts pay a set amount for a defined deliverable;the contractor absorbs cost overruns, giving it an incentive to control costs.
Cost-reimbursement contracts pay allowable incurred costs, up to a ceiling, plus a fee;the government bears more cost risk, so they demand strong documentationand independent audit. They fit uncertain requirements, such as researchand major systems development.
Time-and-materialsand labor-hour contracts pay negotiated hourly rates, plus materials;they can be appropriate for hard-to-define services, but shift cost risk to the governmentand invite billing abuses when documentation is weak.
Indefinite-delivery/indefinite-quantity(IDIQ( contracts** let agencies place task or delivery orders against pre-established terms, often with several awardees competing for each order.
Blanket purchase agreementsand Federal Supply Schedules let agencies order against pre-negotiated agreements with approved vendors.

The choice of contract type is itself a signal. A large, long-duration cost-reimbursement contract for a routine service may deserve more scrutiny than a fixed-price purchase of off-the-shelf items. The terms of any particular contract — task orders, exercised options, modifications, and ceiling prices — can matter as much as the base agreement, because much of the money flows through changes made after award. For a broader view of how federal tax dollars are allocated, see our guide to where U. S. taxpayer money goes.

How Federal Procurement Works

Modern federal procurement rests on two statutory pillars:the Competition in Contracting Act of 1984((CICA,,,which generally requires agencies to obtain “full and open competition” for procurements above simplified thresholds, and the Federal Acquisition Regulation(FAR(,the body of rules codified at48 C. F. R. that governs how agencies acquire goods and services(https://www. acquisition. gov/far/). Individual agencies supplement the FAR with their own regulations — such as the Defense Federal Acquisition Regulation Supplement(DFARS(for the Department of Defense — but the FAR is the common spine.

In simplified terms, the lifecycle looks like this:

Requirement definition. An agency identifies a needand defines the scope of work. Vague or shifting requirements are a common source of later cost growth.
Acquisition planning. The contracting officer, with program officials, chooses contract type, competition approach, and evaluation criteria;limited-competition decisions must be documented where required.
Solicitation. For competitive buys, agencies publish a solicitation—Invitation for Bidsor Request for Proposals—through SAM. gov’s Contract Opportunities module, stating requirements, evaluation factors, and closing date.
Evaluation and award. Offerors are evaluated against the stated factors;in negotiated procurements, agencies may hold discussionsand select the proposalthat represents the best value, not necessarily the lowest price.
Performance and administration. A contracting officer’s representative(COR(monitors performance, invoices are reviewed, and changes are processed through modifications.
Closeout. Final costs are settled, and, where required, auditors review incurred costs. Past-performance records feed future competitions.

Congress shapes this system through appropriations(which control how much an agency may obligate and for what purpose(,authorizing statutes, and procurement-reform legislation. The Office of Federal Procurement Policy(OFPP(inside the Office of Management and Budget issues policy guidance, and the FAR Council maintains the regulation itself. A critical constraint is the Anti-Deficiency Act,which generally prohibits agencies from obligating funds in excess of or in advance of appropriations;violations can carry serious consequences. Because of these rules, procurement records are careful about fiscal years:money is tracked by the year in which it was obligated, not necessarily spent.

How Companies Compete for Government Contracts

Any business that wants to do business with the federal government must first register in the System for Award Management(SAM. gov(,the government’s central vendor database(https://sam. gov/content/entity-registration). Registration includes entity validation and assignment of a Unique Entity ID(UEI(,the government’s standard identifier for organizations that replaced the old DUNS number. Registrations must be kept current;an expired registration can disqualify an offeror or even stop payments.

Beyond registration, competing success typically requires:

Monitoring opportunities. Agencies list proposed actions on SAM. gov’s Contract Opportunities module, and many publish acquisition forecasts giving vendors advance notice.
Building capabilityand past performance. Agencies weigh technical capability, relevant experience, and past performance alongside price;performance is recordedin systems like CPARS.
Responding precisely to solicitations. Noncompliant or late proposals can be rejected outright;mistakes are a common cause of lost competitionsand, at times, of protests.
Using small-business programs. Agencies set aside portions of acquisitions for small, disadvantaged, women-owned, veteran-owned, and HUBZone firms, administered by the Small Business Administration(https://www. sba. gov/federal-contracting).
Knowing the protest channel. Vendors that believe an agency violated procurement law can challenge an award through a bid protest,discussed below.

When an offeror believes an agency’s evaluation was contrary to law or regulation, it mayfile a bid protest. Most protests are heard by GAO, which resolves them on an expedited statutory timetable — its regulations generally provide fora decision within0100 days of filing(https://www. gao. gov/legal/bid-protests). Protests can also be heard by the U. S. Court of Federal Claims. The protest right is a deliberate check against arbitrary contracting;at the same time, frequent protests can delay programs, so protest patterns are also worth watching.

Where Contract Information Can Be Found

The federal government publishes a remarkable amount of contract data. The essential public-facing tools:

SAM. gov (https://sam. gov/)) — registration and entity validation;it hosts Contract Opportunities (the replacement for the retired FedBizOpps(and the Excluded Parties List of debarredandsuspended entities.
USAspending. gov (https://www. usaspending. gov/)) — the official open-data source for federal spending, searchable by recipient, agency, fiscal year, industry, and place of performance, with APIs, and bulk downloads.
FPDS (https://www. fpds. gov/)) — thee Federal Procurement Data System, the system of record for contract actions above micro-purchase thresholds, with detail on competition and number of offers.
FAPIIS (https://www. fapiis. gov/)) — thee Federal Awardee Performance and Integrity Information System, consolidating contractor integrityand performance information, including certain civil, criminal, and administrative proceedings.
Agency procurement sites — most agencies publish solicitations, acquisition forecasts, contract announcements, and award lists(DoD, for example, publishes daily contract announcements(.
GAO (https://www. gao. gov/)) — bid-protest decisions, audit reports, and the high-risk list.
Agency OIGs — inspectors general publish audits, investigation summaries, and semiannual reports(see below(.
FOIA (https://www. foia. gov/)) — thee portal for requesting records not published proactively, from source-selection documents to contract-administration files.

These systems are complementary. SAM. gov tells you who a company claims to be;USAspending tells you how much it was paid;FPDS tells you the contract actions behind those payments;FAPIIS tells you about integrity and performance problems;GAO tells you about systemic weaknesses;and FOIA can unlock the documents explaining why an agency made the choices it did.

How Much Does the Government Spend on Contracts?

Contractsare one of the largest slices of discretionary federal spending, though smaller than mandatory programs like Social Security and Medicare. According to GAO,infiscal year 2024the federal governmentcommitted about $755 billionon contracts—a decrease of about $22.5 billion from fiscal year 2023,after adjusting for inflation(https://www. gao. gov/blog/snapshot-government-wide-contracting-fy-2024-interactive-dashboard). That single-year figure illustrates both the scale of the federal market and the reason procurement accountability matters.

A few points of context are worth keeping in mind:

For context: the Department of Defense is by far the largest purchaser, and small numbers of large firms — especially major defense contractors — receive a large share of contract dollars, while thousands of smaller firms share the rest. USAspending lets anyone track these patterns by fiscal year, agency, industry, and recipient.

The headline number also deserves careful reading. “Committed”or”obligated”dollars are not the same as cash spent in that year:obligations represent amounts the government has legally committed to pay, which may be paid out over many years as work is performed. A contract awarded infiscal year 2024 may still be paying out years later. When reading any procurement figure, check whether it refers to obligations, disbursements, or commitments—and note the fiscal year.

How Contracts Are Monitored

Once a contract is awarded, oversight begins. Several distinct functions come into play:

Contracting officersand representatives. The contracting officer binds the government;representatives(CORs(monitor performance, inspect work, and review invoices. Weak contract administration — lax inspection, uncritical invoice review — is a chronic problem in its own right.
Quality assurance. Government personnel inspectandatest deliverables before acceptanceand payment;accepting uninspected work is a recurring themeinfraud investigations.
Voucher review. Invoicesare reviewed before payment;for cost-reimbursement contracts, incurred costs are typically audited by the Defense Contract Audit Agency(for DoD(https://www. dcaa. mil/),which tests whether claimed costs are allowable, allocable, and reasonable.
Past-performance reporting. Agencies record contractor performancein CPARS, which informs future competitions;inflated ratings can hide problemsfrom later selections.
Payment-integrity controls. Data-matching programs such as Treasury’s”Do Not Pay”initiative screen payments for fraud indicators, and OMB publishes improper-payment estimates via PaymentAccuracy. gov(https://www. paymentaccuracy. gov/).
Inspectors generaland GAO. As described below, OIGs auditand investigate contracting, and GAO reviews acquisitions government-wideand hears bid protests.

Monitoring is not a single event;it is a continuous process spread across many offices. Because responsibility is fragmented, gaps between controls are common—and gaps are exactly where waste and abuse tend to appear.

Common Procurement Red Flags

Not every anomaly is fraud, and a large dollar value alone is not evidence of wrongdoing. But certain patterns consistently correlate with waste, abuse, and fraud. Journalists, auditors, and investigators learn to look for these:

Repeated sole-source awards. Competition is the statutory rule;noncompetitive awards require a documented justification. A pattern of sole-source awards to the same vendor—or justifications citing urgency caused by inadequate planning—warrants scrutiny.
Thin competition. A”competed”procurement that draws only one offer provides little of the market discipline competition is meant to supply. The”extent competed”and”number of offers”fields in FPDS/USAspending give the first read on this.
Cost overrunsand scope creep. Major cost growth driven by modificationsand changing requirements can signal poor planning or, worse, deliberate low-balling to win work. Comparethe original contract valuewith cumulative value after modifications.
Billing patterns that don’t match performance. Invoicesclustering at contract ceilings, charges for labor when no deliverables appear, or billing before work is performed are classic fraud indicators.
Weak documentation. Improper-payment data show that many payment errors stem from records that cannot support the payment—missing receiving reports, absent time sheets, unapproved rates. Documentation weakness is both a waste driver and an enabler of fraud.
Conflicts of interest and revolving doors. Contracting officials who move to jobs with firms they once oversaw, or who hold financial interests in awardees, create obvious integrity risks. Agency ethics rules and the Office of Government Ethics govern these situations, but detecting them requires looking.
Pass-throughsand questionable subcontracting. A prime contractorthat appears to add little value while subcontracting most of the work can inflate costs, particularly under cost-reimbursement arrangements. Subaward data on USAspending can reveal where the money ultimately goes.
Debarment, suspension, and integrity flags. FAPIIS and SAM. gov’s exclusions list record entities barred from federal work or subject to integrity proceedings. A vendorwith a history of exclusions, settlements, or adverse determinations deserves extra attention.
Seeing one red flag proves nothing. Several converging—say, sole-source awards, weak documentation, and poor past-performance ratings—merit a closer look. For more on distinguishing confirmed misconduct from allegations, see our piece onfraud, waste, and abuse in the U. S. government.

Fraud, Waste and Abuse Risks

Procurement fraud, waste, and abuse(FWA(is a perennial issue government-wide. The terms are worth defining precisely:

Fraud involves intentional deception to obtain money or property—for example, submitting invoices for work not performed, falsifying cost or pricing data, or paying kickbacks to influence awards. Fraud is a crime or civil violation, typically pursued by the Department of Justice through statutes like the False Claims Act.
Waste involves excessive, imprudent, or unnecessary spending—not necessarily illegal, but contrary to sound management. Cost overruns, overpriced requirements, and buying items already in inventory are examples.
Abuse involves deficient or improper behavior, though it may not rise to criminal fraud—for example, bending rules to favor a particular vendoror using contract resources for personal purposes.

One measure of the scale of the problem comes from payment-integrity data. Infiscal year 2024,federal agencies reported an estimated$162 billionin improper payments across 68 programs, about84 percentof it in overpayments, according to GAO(https://www. gao. gov/products/gao-25-107753). Improper payments include payments made in incorrect amountsand payments whose propriety could not be determined due to insufficient documentation;they are not the same as fraud, but they signal weaknesses in payment controls that fraud can exploit. Since fiscal year 2003,cumulative improper-payment estimates by executive-branch agencies have totaled about$2.8 trillion(same source(. In fiscal year 2025,reported estimates rose to about$186 billion(GAO).

Enforcement datagives another lens. The Department of Justice reported thatinfiscal year 2024,settlementsand judgments under theFalse Claims Actexceeded$2.9 billion,involving 558 resolutions, and whistleblowers filed979 qui tam lawsuits—the highest number in a single year(https://www. justice. gov/opa/pr/false-claims-act-settlements-and-judgments-exceed-29b-fiscal-year-2024). Recoveries under the statute have totaledmore than $78 billionsince Congress substantially strengthened itin 1986(same source(. A substantial share of False Claims Act enforcement involves alleged fraudin government programs generally, including healthcare and procurement.

A notable procurement example:inOctober 2024,Raytheon Company agreed to pay$428 millionto resolve allegations that it knowingly provided false cost and pricing data when negotiating with the Department of Defense for numerous contractsand double billed ona weapons maintenance contract, leading to profits in excess of negotiated rates—what DOJ described as the second-largest government procurement fraud recovery under the False Claims Act(same source(. As with any settlement, this resolution resolvedallegationswithout admission of liability—an essential distinction between”alleged”and”proven.”

The practical lesson:fraud usually takes the form of a pattern — falsified records, inflated costs, and exploited documentation gaps — that persists because controls are weak. Those weaknesses are what auditorsandinspectors general are paid to find.

The Role of Auditorsand Inspectors General

Two independent watchdog institutions sit atop federal oversight:theGovernment Accountability Office(GAO(,andtheinspectors general(IGs(of individual agencies.

GAOis Congress’s audit arm—an independent, nonpartisan agencythat examines how federal dollars are spent(https://www. gao. gov/). Its work relevant to contracting includes:

Auditsand evaluationsof agencies’acquisition management, from weapons systems to information technology to service contracting.
Bid protests,resolved by its Office of General Counsel under approximately a100-day statutory timetable(https://www. gao. gov/legal/bid-protests). Infiscal year 2024,GAO received1,803 cases,including 1,740 protests, and sustained16 percentof the protests it resolved on the merits—a reminder that most protests fail, but a meaningful minority succeed(https://www. gao. gov/products/gao-25-900611).
The High-Risk List,which since 1990 has flagged federal programsand management areas especially vulnerable to waste, fraud, abuse, and mismanagement(https://www. gao. gov/high-risk-list). As of February .,2025,the list identifies38 areas,includingDepartment of Defense Contract ManagementandImproving IT Acquisitionsand Management;GAO estimates that attention to high-risk areas has produced nearly$759 billionin financial benefits since the list began(same source(.

Inspectors generalare semi-independent watchdogs embedded in executive-branch agencies, established government-wideby theInspector General Act of 1978. Each IG conducts auditsand investigations of its agency’s programs, publishes reportsand semiannual reports to Congress, and operates a fraud hotlinewhere whistleblowersandthe public can report suspected wrongdoing. Because IGs sit inside the agencies they oversee, they combine deep program knowledge with statutory independence;they report to both the agency headand Congress. TheCouncil of the Inspectors General on Integrity and Efficiency(CIGIE(,coordinates the community(https://www. ignet. gov/).

IG audits routinely examine contracting processes, cost estimates, major-system acquisition, and payment integrity;IG investigations can refer criminal cases to DOJ, and IG reports often underpin later civil enforcement. Alongside DCAAand agency legal offices, GAO, IGs, and DOJ formthe oversight ecosystemthat makes federal contracting one of the most examined purchasing systems in the world.

How Citizens and Journalists Can Research Government Contracts

Anyone can investigate federal contracting;the tools are free, public, and searchable. A practical workflow:

Start with the vendor, the agency, or the program. Identify the entity or program of interest. If studying a company, confirm its identityin SAM. gov—legal name, Unique Entity ID, and exclusion status(https://sam. gov/content/entity-registration).
Pull the award data. Search USAspending. gov by recipient, agency, place of performance, NAICS code, or fiscal year. Note the distinction between prime award obligationsand subawards;exportthe underlying records. For contract-action-level detail, cross-check FPDS(https://www. fpds. gov/).
Read the contract actions. Examine contract type, competition status(competed vs. sole source(,number of offers, award date, base amount, and exercised options, and especiallymodifications—a contract’s modification history often tells the real story.
Check integrityand performance. Search FAPIIS for civil, criminal, and administrative proceedings involving the contractor, and SAM. gov’s excluded-parties records for debarmentsand suspensions(https://www. fapiis. gov/).
Pull auditsand reports. Search GAO’s website for audits involving the agency or program, andthe agency IG’s site for recent audits, investigations, and semiannual reports. GAO product pages link to full reports(see, e. g.,GAO-25-107753).
Read the protest decisions. GAO’s bid-protest database contains decisions explaining why agencies did(or didn’t(violate procurement law—a rich, underused research source(https://www. gao. gov/legal/bid-protests).
Use FOIA when needed. Most agencies publish a FOIA reading roomand accept requests electronically;the FOIA. gov portal explains the process, including how to appeal denials(https://www. foia. gov/). Procurement records—source-selection documents, price negotiations, contractor-responsibility determinations—are frequently obtainable via FOIA, subject to well-defined exemptions.
Follow the money downstream. Prime awards reported by agencies are matched with subaward reports filed by contractors, viewable on USAspending;tracing dollarsfrom a prime to a subcontractor can reveal pass-through arrangementsand hidden recipients.
Look for patterns, not anecdotes. A single sole-source awardis not news;five years of them to the same vendor, with rising ceilingsand weak justifications, is. Compile data across yearsin a spreadsheet, and draw conclusions only when patterns hold up.

For a deeper walkthrough of FOIA strategyand public-records research, see our guide tousing public recordsand FOIA to investigate the U. S. government.

Frequently Asked Questions

What is the difference between a federal contractand a grant?
A contract buys goods or services for the government’s direct benefit. A grantor cooperative agreement provides money or property to support a recipient’s project for a public purpose, with different rulesand less direct government control. They are tracked separatelyon USAspending.

What is a bid protest, and why does it matter?
A bid protest is a formal challenge to a contracting decision, usually filed by an unsuccessful offeror who believes the agency violated procurement law. GAO resolves most protests on an expedited basis, and when it sustains a protest, agencies must correctthe problem—often by re-evaluating proposalsor redoingthe award. Protest statisticsarea useful window into how well agencies run competitions.

How do I find out whether a company has been paid by the government?
Search the recipient’s exact legal name on USAspending. gov;its federal award history, including contractand grant obligations by fiscal year, will appearsin results. Because subsidiaries use different entity names, confirm the identity using SAM. gov’s registration records.

Is an improper payment the same as fraud?
No.”Improper payment”is a technical term covering payments that should not have been made or were made in the wrong amount—including overpayments, underpayments, and payments whose propriety could not be determined. Fraud is a subset involving intentional deception. The $162 billion in estimated improper payments reported for fiscal year 2024 is not a fraud finding;it is a measure of payment-integrity weaknesses(GAO).

Where can I report suspected contracting fraud?
Agency inspectors general operate hotlines for suspected fraud, waste, and abusein their programs(seeIGNET。the FBI accepts procurement-fraud tips;and whistleblowers can consult an attorneyabout the False Claims Act’s qui tam provisions, which allow private citizens to sue on behalf of the governmentand share in recoveries.

Sourcesand Public Records

The following official, public sources underlie this explainerand are the right starting points for independent research:

Procurement lawand policy
– Federal Acquisition Regulation(FAR(:https://www. acquisition. gov/far/
– Small Business Administration—federal contracting:https://www. sba. gov/federal-contracting

Vendors, opportunities, and exclusions
– System for Award Management—entity registration:https://sam. gov/content/entity-registration
– SAM. gov—Contract Opportunitiesand Excluded Parties:https://sam. gov/

Spending data
– USAspending. gov—award data, subawards, APIs:https://www. usaspending. gov/
– Federal Procurement Data System(FPDS(:https://www. fpds. gov/
– FAPIIS—contractor integrityand performance:https://www. fapiis. gov/
– OMB PaymentAccuracy. gov—improper-payment data:https://www. paymentaccuracy. gov/

Oversightand enforcement
– GAO—reports, bid protests, high-risk list:https://www. gao. gov/;bid protests:https://www. gao. gov/legal/bid-protests;high-risk list:https://www. gao. gov/high-risk-list
– GAO,”A Snapshot of Government-Wide Contracting for FY 2024″:https://www. gao. gov/blog/snapshot-government-wide-contracting-fy-2024-interactive-dashboard
– GAO,”Improper Payments:Information on Agencies’ Fiscal Year 2024 Estimates”(GAO-25-107753(:https://www. gao. gov/products/gao-25-107753
– GAO,”Improper Payments:Information on Agencies’ Fiscal Year .,2025 Estimates”(GAO-26-108694(:https://www. gao. gov/assets/890/888176.pdf
– GAO,”Bid Protest Annual Report to Congress for Fiscal Year .,2024″(GAO-25-900611(:https://www. gao. gov/products/gao-25-900611
– Council of the Inspectors General on Integrity and Efficiency(IGNET(:https://www. ignet. gov/
– Defense Contract Audit Agency:https://www. dcaa. mil/
– U. S. Department of Justice,”False Claims Act Settlementsand Judgments Exceed $2.9B in Fiscal Year 2024″:https://www. justice. gov/opa/pr/false-claims-act-settlements-and-judgments-exceed-29b-fiscal-year-2024

Freedom of information
– FOIA. gov—how to request federal records:https://www. foia. gov/

This article is explanatory journalism grounded entirelyin public primary sources. It does not allege misconduct by any person or entity named herein. Settlements refer to resolved allegations without admission of liability, and figures are as reported by the cited agencies for the fiscal years indicated.

How U.S. Government Contracts Work: Spending, Oversight and Red Flags