What is an IDIQ contract?
An IDIQ (Indefinite Delivery / Indefinite Quantity) contract is a federal contracting vehicle that lets agencies place multiple orders against a single award over a period of years without re-competing the underlying contract. Vendors awarded an IDIQ slot can receive task orders or delivery orders as needs arise.
IDIQ stands for Indefinite Delivery / Indefinite Quantity. It is a contract type defined in FAR Subpart 16.5 used when an agency anticipates ongoing needs for similar goods or services but cannot predict the exact quantity or timing.
When an agency awards an IDIQ contract, the contract itself does not commit to a specific quantity. Instead, it establishes pricing, terms, and a pool of awardees. The agency then issues task orders (for services) or delivery orders (for products) against the IDIQ contract as needs come up — without going through full new competition each time.
IDIQ contracts can be single-award (one vendor) or multiple-award (a pool of vendors who compete for task orders against each other). Multiple-award IDIQs are common in federal IT, professional services, and engineering.
Key terms in an IDIQ: - Maximum order limit: the highest single task order the contract allows - Minimum guarantee: the smallest amount the agency commits to spend - Contract ceiling: the total IDIQ ceiling across all orders - Ordering period: the years during which task orders can be placed
For vendors, winning an IDIQ slot is often a multi-year revenue commitment but requires significant up-front bid investment. Many of the largest federal contract vehicles (GSA Schedule, OASIS, GWACs) are structured as IDIQs.