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What Does FAR 16.5 Require for IDIQ Contracts?

FAR 16.5 governs indefinite-delivery contracts, prefers multiple-award IDIQs, and requires stated minimums, maximums, and order procedures.

intermediate2 min readStep-by-step guide
What Does FAR 16.5 Require for IDIQ Contracts editorial illustration

Summary

What Does FAR 16.5 Require for IDIQ Contracts? FAR 16.5 governs indefinite-delivery contracts, prefers multiple-award IDIQs, and requires stated minimums, maximums, and order procedures.

Source & Authority Information

Published: January 26, 2026
Substantively updated: August 26, 2026
Information as of: 2026-08-26
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Author: Gov Contract Finder Editorial Team
Primary sources:
  • •Subpart 16.5 - Indefinite-Delivery Contracts(accessed August 26, 2026)
  • •16.504 Indefinite-quantity contracts. | Acquisition.GOV(accessed August 26, 2026)

AI-assisted and automatically checked against the linked primary sources.

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What does FAR 16.5 require for IDIQ contracts?

FAR Subpart 16.5 covers indefinite-delivery contracts and says agencies should prefer multiple awards of indefinite-quantity contracts. It defines delivery-order contracts as supply contracts without a firm quantity and task-order contracts as service contracts without a firm quantity, both using orders during the contract period. The subpart also recognizes three indefinite-delivery contract types: definite-quantity, requirements, and indefinite-quantity. FAR 16.504 says an indefinite-quantity contract covers an indefinite quantity within stated limits, must require at least a stated minimum that is more than nominal, and may not obligate the Government beyond the stated maximum. The solicitation and contract must state the period, minimum and maximum quantities, scope, ordering procedures, selection criteria for multiple awards, authorized ordering activities, and oral-order authorization if used. The multiple-award preference applies to the maximum extent practicable, except for advisory and assistance services, and the subpart preserves GSA schedule authority and the architect-engineer rules in subpart 36.6. Source 1 also notes a separate determination rule for certain requirements contracts over $150 million awarded to a single source.

Process

  1. 1
    Classify the vehicle

    Choose definite-quantity, requirements, or indefinite-quantity based on whether future quantities and timing are known.

  2. 2
    Draft the solicitation

    Include the contract period, options, stated minimum and maximum quantities, scope, and the ordering procedures the Government will use.

  3. 3
    Set the award structure

    If multiple awards are contemplated, include the fair-opportunity procedures and selection criteria for orders.

  4. 4
    Check the exceptions

    Confirm whether GSA schedule coverage, architect-engineer rules, or small-business procedures change the approach.

Important Note

FAR Subpart 16.5 does not displace GSA schedule authority, and its multiple-award preference does not apply to architect-engineer contracts subject to subpart 36.6. The subpart also points users to subpart 19.5 for small-business set-aside and reserve procedures on multiple-award contracts.

Quick Answers

  • How does task order competition work under IDIQ contracts?
  • How do I find task order competitions?

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