4.5 Indefinite-Delivery Contracts & Task/Delivery Orders (RFO Subpart 16.5)
Key Takeaways
Definite-quantity, requirements, and indefinite-quantity contracts address different kinds of delivery and quantity uncertainty; an estimated requirements quantity is not a guaranteed purchase.
An IDIQ contract specifies a binding minimum, a maximum, and an ordering period. The minimum must exceed a nominal quantity and should not exceed what the government is fairly certain to order.
RFO 16.504-3 gives preference to multiple IDIQ awards where practicable. A covered single-source task/delivery-order contract estimated above $150 million including options needs the specified written head-of-agency determination.
RFO 16.507-2 requires fair consideration above the applicable micro-purchase threshold unless an approved exception applies; solicitation and documentation procedures depend on order value.
RFO 16.508 separates scope/period/maximum-value protests from value-based protests. The latter require more than $10 million for other agencies or more than $35 million for DoD, NASA, or the Coast Guard, and are filed only at GAO.
4.5 Indefinite-Delivery Contracts & Task/Delivery Orders
An indefinite-delivery arrangement separates the underlying contract from later orders. Start by asking what is known at contract award: the total quantity, the buyer's actual requirements, or only a minimum and maximum. Then identify the order's scope, value, and applicable competition procedure.
Choose the right contract type
| Arrangement | Purchase commitment | What an estimate means |
|---|---|---|
| Definite-quantity — RFO 16.502 | A fixed quantity for the contract period; delivery scheduling can vary | Scheduling flexibility does not change the agreed total quantity |
| Requirements — RFO 16.503 | Covered actual purchase requirements of the designated government activities go to the contractor within the contract's limits | A realistic estimate helps bidders plan; it does not guarantee that estimated quantity |
| Indefinite-quantity/IDIQ — RFO 16.504 | A stated minimum is binding; additional quantities can be ordered up to the maximum | The ceiling limits potential ordering, rather than promising purchases up to that ceiling |
For example, an illustrative IDIQ with a properly established 100-unit minimum and 1,000-unit maximum does not promise purchases of all 1,000 units. The minimum and maximum do different jobs. A requirements contract, by contrast, commits the covered actual requirements rather than converting its estimate into a fixed order quantity.
Set the IDIQ limits before issuing orders
RFO 16.504-1 requires a minimum greater than a nominal quantity. The minimum should not exceed the quantity the government is fairly certain it will order. No universal dollar-to-ceiling ratio in that rule determines whether a particular minimum is adequate.
Under RFO 16.504-5, specify the ordering period and options, total minimum and maximum, authorized ordering activities, the general work scope, and the last required delivery date for orders placed during the ordering period. Distinguish the deadline for issuing an order from that order's performance period. Treat an order beyond the contract's scope or ceiling as a separate legal issue, rather than assuming that an administrative modification automatically cures it.
Multiple awards and the single-award limit
RFO 16.504-3 prefers multiple IDIQ awards to the extent practicable and requires the award approach to be documented. The preference has specified qualifications; it is not an absolute ban on a single award.
For covered task/delivery-order contracts estimated above $150 million, including options, a single-source award requires the head of the agency's written determination under 16.504-3(a)(4). Its alternatives address inseparable work, qualifying firm-fixed-price arrangements with established prices, one qualified and capable source at a reasonable price, or exceptional public-interest circumstances. The rule has an architect-engineer exception. Do not confuse this contract-level limit with an individual order's competition or protest threshold.
Apply the current order-competition procedure
RFO 16.507 contains the ordering rules; 16.505 now addresses solicitation provisions and contract clauses. For multiple-award contracts, identify the applicable micro-purchase threshold (MPT) and simplified acquisition threshold (SAT), including any relevant special rule.
| Order value | Main procedure |
|---|---|
| At or below MPT — 16.507-1 | An eligible contract holder that meets the need can receive the order; agencies should attempt to distribute orders among holders |
| Above MPT through SAT — 16.507-3 | Fairly consider the eligible holders and document the decision; sufficient existing information can permit placement without soliciting every holder |
| Above SAT through $7.5 million — 16.507-4 | Give fair notice to all holders offering the required products/services and state the work and selection basis |
| Above $7.5 million — 16.507-5 | Give the required notice, a reasonable response period, significant evaluation factors/subfactors and their relative importance; follow Part 15 for postaward notices and debriefings |
The last band does not impose a universal 30-day response period. Price or cost is a factor for each order under 16.507-2(c). Streamlined ordering does not require copying every Part 15 source-selection procedure, and streamlined does not mean an undocumented preference for a favorite contractor.
Recognize an exception and document its basis
RFO 16.507-6(b) identifies six grounds for a sole-source order or BPA above MPT: urgent need; unique/highly specialized requirements that only one holder can meet; a logical follow-on where all holders had fair opportunity for the original order; satisfying the minimum guarantee; a statute specifying the source for an order above SAT; and specified Part 6 exceptions for DoD, NASA, and the Coast Guard. The last ground has its own public-interest notification condition.
Above MPT through SAT, document the basis for the exception. Above SAT, prepare the required written justification and follow the value-based approval and posting rules in 16.507-6(d)-(f). Small-business set-asides and reserved orders have separate authority in 16.507-6(c); they are not simply a seventh sole-source rationale or the sixth listed ground.
Separate complaints from protests
The agency ombudsman under 16.507-2(b) reviews contract-holder complaints about fair opportunity and is independent of the contracting officer. That complaint process is separate from the protest rules in 16.508.
For a protest based on order value, an order must exceed $10 million for agencies other than DoD, NASA, and the Coast Guard, or exceed $35 million for those three agencies. These value-based protests go only to GAO. An order exactly at the stated threshold does not satisfy the greater-than test.
A separate exception concerns an order that increases the underlying contract's scope, period, or maximum value. Do not attach the value threshold or the value-based GAO-only qualification to that separate exception. Small-business size-status protests follow Part 19.
Source: Acquisition.gov RFO, effective July 1, 2026, Subpart 16.5, printed pages 16.5-1 through 16.5-11. Read applicable agency deviations and supplements alongside these government-wide provisions.
Under current RFO 16.507-2, when does the general fair-opportunity requirement apply to an order under a multiple-award contract, absent an approved exception?
Above the applicable micro-purchase threshold
Only above the simplified acquisition threshold
Only above $1 million
Only above $7.5 million
Which statement correctly describes the minimum quantity in an IDIQ contract under RFO 16.504-1?
It is merely a planning estimate with no purchase commitment
It creates a binding purchase commitment and must exceed a nominal quantity
It guarantees purchases up to the maximum ceiling
It is established only after all contract orders are complete
Which statement gives the exact published value-based protest threshold in RFO 16.508 for an agency other than DoD, NASA, or the Coast Guard, without relying on the separate scope/period/maximum-value exception?
The order must exceed $10 million
The order must exceed $35 million
The order must exceed $7.5 million
The order must exceed $150 million
Which situation is a listed exception to fair opportunity under current RFO 16.507-6(b)?
An order is necessary to satisfy the contract minimum guarantee
The contracting officer prefers a particular local contractor
A favored holder informally offers a 5% discount
Every order below $1 million can be sole sourced without justification
Sections you finish are checked off in the contents.