Single and multiple award IDIQs, task and delivery orders, fair opportunity, on-ramps, and what a seat on a vehicle is actually worth.
Last reviewed on September 28, 2026 by the Government.biz editorial team against FAR Subpart 16.5 (FAC 2026-01) and the task order protest provisions as amended by the FY2025 NDAA.
An indefinite-delivery, indefinite-quantity (IDIQ) contract is a master agreement under which the government can buy an unspecified quantity of supplies or services, within stated limits, over a fixed ordering period. The IDIQ itself usually buys nothing beyond a small guaranteed minimum. The actual work is purchased through task orders (for services) and delivery orders (for supplies) issued against it. The rules live in FAR Subpart 16.5, especially FAR 16.504 (the contract) and FAR 16.505 (ordering).
IDIQ is a contract structure, not a pricing type. Individual orders under an IDIQ can be firm-fixed-price, time-and-materials, or cost-reimbursement, depending on what the base contract allows. The contract types guide explains how the two dimensions combine.
Agencies like IDIQs because they let the government award once and then buy repeatedly without running a full source selection for every requirement. That is also why so much federal spending now flows through them — and why getting onto the right vehicles has become a core part of federal business development.
One contractor holds the vehicle, and orders go directly to that contractor without further competition. Used for a defined, ongoing requirement where one source makes sense.
Several contractors are awarded parallel IDIQs from a single solicitation, and they compete for each order. The FAR states a preference for multiple awards "to the maximum extent practicable."
Every IDIQ must state three things:
On a multiple-award IDIQ, every holder must be given a fair opportunity to be considered for each order above the micro-purchase threshold, unless a statutory exception applies. The procedures scale with order size (see acquisition thresholds for the current values):
| Order value | What FAR 16.505(b) requires |
|---|---|
| Above the micro-purchase threshold, up to the SAT ($350,000) | Fair opportunity, with broad contracting officer discretion on how to run it; not every holder must be contacted if the officer has enough information to ensure fair consideration |
| Above the SAT, up to $7.5 million | Fair notice of the intent to order to all holders offering the required work, a description of the requirement and basis for selection, and a fair opportunity to submit an offer |
| Above $7.5 million | All of the above, plus a clear statement of requirements, a reasonable response period, disclosure of significant evaluation factors and their relative importance, a written statement documenting the award basis, and a post-award debriefing on request |
Order competitions are deliberately lighter than FAR Part 15. Agencies commonly use short fair-opportunity proposals, oral presentations, technical challenges, or price-driven selections, and they are not required to follow Part 15's competitive-range and discussions rules. That speed is the point — and it rewards companies that have their past performance, key personnel, and pricing ready before the request for proposal arrives.
The contracting officer may award an order directly to one holder, with a written justification, if:
Justifications for orders above the SAT must generally be made publicly available on SAM.gov within 14 days after the order is placed.
Even on a full-and-open IDIQ, contracting officers may set aside individual orders for small businesses that hold the vehicle, and many vehicles use dedicated small business pools. For VA acquisitions, the Supreme Court's 2016 decision in Kingdomware Technologies v. United States held that the VA's Veterans First "rule of two" applies to its orders as well. Watch for the socioeconomic designations in each order request — they change who you are competing against.
| Vehicle type | Who can order | Examples |
|---|---|---|
| Governmentwide acquisition contract (GWAC) | Any federal agency; IT-focused multiple-award IDIQs run by agencies OMB designates as executive agents | 8(a) STARS III, Alliant 3, CIO-SP4, NASA SEWP |
| Multi-agency contract | Other agencies under the Economy Act or the vehicle's own authority | GSA's OASIS+ for professional services |
| Agency-specific IDIQ | Only the awarding agency or command | Command-level engineering, logistics, or IT services MACs |
| GSA Multiple Award Schedule (MAS) | All federal agencies and some state and local entities | See GSA Schedules |
The GSA Schedule behaves much like an IDIQ, but orders under it follow FAR Subpart 8.4 rather than FAR 16.505, and blanket purchase agreements are frequently established against it. Unlike most GWACs, the Schedule is continuously open to new offers, which makes it the most accessible "vehicle" for a small business.
Task and delivery orders are much harder to protest than standalone contracts. Under FAR 16.505(a)(10) and the underlying statutes, no protest is allowed on the issuance of an order except:
Protests of orders above those thresholds can be heard only at the GAO, not the Court of Federal Claims. Below them, your practical options are limited to agency-level engagement, a debriefing where one is available, and — in some agencies — the task order ombudsman, who reviews complaints about fair opportunity but cannot overturn awards. See GAO bid protests and debriefings for the procedures that apply.
Winning a seat is the beginning of the capture effort, not the end. On large multiple-award vehicles it is common for a meaningful share of holders to receive little or no work, while a smaller group wins most of the orders. The companies that win orders consistently tend to share a few habits:
Be realistic about the cost of holding vehicles. Each one carries reporting and management overhead and demands ongoing bid/no-bid discipline. A focused portfolio of two or three vehicles that match your customers usually beats a long list of seats you cannot pursue.
Once you win an order, it is administered like any other contract: modifications change it, invoices are submitted against the order's CLINs, and a CPARS evaluation may follow.
An indefinite-delivery, indefinite-quantity (IDIQ) contract is a master contract under which the government buys an unspecified quantity of supplies or services, between a stated minimum and maximum, over a fixed ordering period. The work itself is bought through task orders (services) and delivery orders (supplies) issued against it under FAR Subpart 16.5.
A single-award IDIQ has one contractor, and orders go directly to it. A multiple-award IDIQ has several holders who compete for each order under the fair opportunity rules of FAR 16.505. The FAR prefers multiple awards, and single awards of task or delivery order contracts over $150 million require a written agency head determination.
Fair opportunity means every holder of a multiple-award IDIQ must be given a fair opportunity to be considered for each order above the micro-purchase threshold, unless an exception applies. Orders above the simplified acquisition threshold require fair notice to all holders, and orders above $7.5 million add disclosed evaluation factors, a documented award decision, and a debriefing on request.
No. It guarantees only the minimum stated in the contract, which is often small. The ceiling is the most the government may order across the vehicle, not a revenue forecast. Holders on multiple-award vehicles must still compete for and win individual task orders.
Only in limited cases. A task or delivery order can be protested if it increases the scope, period, or maximum value of the IDIQ, or if it is valued above $10 million for civilian agencies or above $35 million for DoD, NASA, and the Coast Guard. Those protests go only to GAO.
An on-ramp is a solicitation, provided for in the IDIQ, that adds new contract holders after the original award. It gives companies that missed the initial competition, or that have since grown or obtained certifications, a chance to join the vehicle.
A GWAC is a governmentwide multiple-award IDIQ, usually for IT, with fixed award rounds and on-ramps, and orders follow FAR 16.505. The GSA Multiple Award Schedule is continuously open to new offers and orders follow FAR Subpart 8.4. Both can be used by any federal agency.
Authoritative sources: FAR Subpart 16.5 — Indefinite-Delivery Contracts, FAR 16.505 — Ordering, and 10 U.S.C. 3406 / 41 U.S.C. 4106. This page is general information, not legal advice; the ordering procedures in each IDIQ control.