Indefinite-Delivery, Indefinite-Quantity (IDIQ)
What It Is
An indefinite-delivery, indefinite-quantity (IDIQ) contract provides for an indefinite quantity, within stated minimum and maximum limits, of supplies or services to be furnished during a fixed ordering period. The government does not buy a set amount up front; it places task orders (services) or delivery orders (supplies) as needs arise. The government must order at least the guaranteed minimum and may order up to the maximum (ceiling). IDIQ is an ordering vehicle, not a pricing type — individual orders are themselves priced as fixed-price, T&M, or (less often) cost-reimbursement. Many GWACs and agency-wide vehicles are multiple-award IDIQs where holders compete for orders under fair opportunity.
Who Carries the Risk
The contract guarantees only the stated minimum; beyond that, work depends on orders the government chooses to place. Pricing risk is set by the order type, not the IDIQ itself.
When the Government Uses It
- Recurring needs where the government cannot predetermine the precise quantities or timing of supplies or services.
- Agency-wide and governmentwide vehicles (GWACs, multiple-award IDIQs) that pre-qualify a pool of holders to compete for orders.
- When the government wants to award once and then order repeatedly over a multi-year ordering period.
Key Features
| Feature | What It Means |
|---|---|
| Minimum & maximum | A guaranteed minimum the government must order (consideration for the contract) and a maximum ceiling it may not exceed. |
| Task / delivery orders | Actual work comes through orders placed during the ordering period — task orders for services, delivery orders for supplies. |
| Fair opportunity | On multiple-award IDIQs, holders generally get a fair opportunity to be considered for each order above the micro-purchase threshold (FAR 16.505). |
| Order pricing type | Each order is priced as FFP, T&M, or cost-type — the IDIQ is the vehicle, the order is where the pricing arrangement lives. |
What It Means for an SDVOSB
Winning a seat on a multiple-award IDIQ is access, not revenue — only the guaranteed minimum is assured, and you then have to win individual task orders under fair opportunity. For SDVOSBs this matters two ways: IDIQs (including SDVOSB set-aside pools and the SBA 8(a)/GWAC ecosystem) are a major pipeline, and the limitations on subcontracting are generally measured at the order level for set-aside orders, by the order's pricing type. Track order-level self-performance with the limitations-on-subcontracting calculator, and see the contract vehicle directory for SDVOSB-eligible IDIQs.
Common Pitfalls
- Treating an IDIQ award as guaranteed revenue — only the stated minimum is, and it is often small.
- Ignoring fair-opportunity procedures and missing or mis-bidding individual task orders.
- Forgetting that the limitations on subcontracting are typically applied per set-aside order, by that order's pricing type — not across the whole vehicle.
Run the Numbers
Frequently Asked
Is an IDIQ a type of contract or a way of ordering?
Both, in a sense. IDIQ is an indefinite-delivery vehicle under FAR 16.504 — it sets up the relationship and the minimum/maximum quantities — but it is not itself a pricing arrangement. The actual work comes through task or delivery orders, and each order is priced as firm-fixed-price, time-and-materials, or cost-reimbursement. So you can have, for example, FFP task orders under an IDIQ.
How do limitations on subcontracting apply on an IDIQ?
For set-aside orders, the limitations on subcontracting (13 CFR 125.6) are generally measured at the order level, using that order's pricing type and work category — services, supplies, or construction. So track self-performance order by order rather than across the whole vehicle, and confirm the contract's specific terms with your contracting officer.
Primary Sources
Plain-English reference, not legal advice. Contract-type selection is a contracting-officer judgment and the FAR is periodically amended — always confirm the contract type, clauses, and how the limitations on subcontracting are measured against the solicitation and your contracting officer before relying on this.
Change log (1)
- LaunchedPublished the federal contract types reference covering the pricing and delivery arrangements an SDVOSB encounters on set-asides — firm-fixed-price (FFP), fixed-price with economic price adjustment (FP-EPA), fixed-price incentive (FPIF), the cost-reimbursement family (CPFF, CPIF, CPAF), time-and-materials and labor-hour, the indefinite-delivery vehicles (IDIQ, requirements, definite-quantity), and letter contracts — each with a who-carries-the-risk callout, a key-features table, an SDVOSB-specific angle tying the type to the limitations on subcontracting, common pitfalls, FAQPage, Article, Dataset, and BreadcrumbList structured data, primary-source FAR Part 16 citations, and cross-links into the glossary, regulation explainers, how-to guides, FAQ, and the limitations-on-subcontracting and price-to-win calculators.