Indefinite Delivery/Indefinite Quantity (IDIQ) Contract

How It Works

IDIQ contracts, authorized under FAR Subpart 16.5, are the workhorse vehicle for federal IT services, professional services, and many commodity purchases. They establish a ceiling value, period of performance, labor categories or product types, and ordering procedures, but the government only obligates funds when it issues individual task orders or delivery orders against the vehicle. This gives agencies flexibility to scale work up or down without running a new procurement each time, critical for multi-year programs with uncertain requirements. Typical IDIQ contracts run 5-10 years (a 5-year base plus option periods) with ceiling values ranging from $100 million to over $50 billion. Major government-wide IDIQ vehicles include NITAAC's CIO-SP3 and CIO-SP4 (health IT, held by HHS/NIH with a $50B ceiling), NASA's SEWP V ($20B ceiling for IT products), GSA's Alliant 2 ($50B ceiling for IT services), GSA OASIS (professional services, replaced in 2024 by OASIS+), and the Army's ITES-3S and ITES-SW contracts. The DoD's Joint Warfighting Cloud Capability (JWCC) is a $9B multi-award cloud IDIQ held by Amazon Web Services, Microsoft, Google, and Oracle. Multiple-award IDIQs (where the government qualifies several contractors) are the norm for large vehicles, and the FAR generally requires "fair opportunity" competition for task orders above $7 million among the qualified holders. Leidos, Booz Allen Hamilton, CACI, General Dynamics IT (GDIT), SAIC, and ManTech are consistently among the largest IDIQ task order winners, collectively pulling in tens of billions per year from these vehicles. Because IDIQs disaggregate spending across many small orders, they can obscure total contractor revenue from casual public view, task order obligations often show up as separate PIIDs with no obvious tie to the prime. TaxDollarData aggregates task order obligations up to the prime contractor level so users can see the full picture of what each company receives.

Related Terms

• Federal Contract, A legally binding agreement between the U.S. government and a private company to provide goods or services, from fighter jets to IT consulting.
• Task Order, An individual work order issued under a larger IDIQ contract, specifying the exact scope, deliverables, and price for a particular piece of work.
• Competitive Bidding (Full and Open Competition), The standard procurement process where the government publicly solicits proposals from multiple vendors and selects the best offer based on price, quality, and capability.
• GSA Schedule (Multiple Award Schedule), A pre-negotiated government-wide IDIQ contract program run by GSA that lets any federal agency buy commercial products and services from qualified vendors at pre-approved prices.
• Blanket Purchase Agreement (BPA), A simplified method for filling anticipated repetitive needs by setting up a "charge account" arrangement with a qualified supplier, without running a new procurement each time.