FAR and DFARS › DFARS Part 217: Special Contracting Methods › Subpart 217.1
DFARS 217.171 Multiyear contracts for services.
The codified text (eCFR, as of 2026-10-02). Under the Revolutionary FAR Overhaul ↗, agencies follow class deviations with new text for many parts while the formal rules go through the Federal Register: check the solicitation and your contract's clauses, which rule.
In plain English
This section lets the head of a defense agency award multiyear contracts for certain services for up to 5 years, even when funds are normally limited to one fiscal year. It lists which services qualify and requires a written determination before the contract is awarded. It also sets a $900 million value limit unless a law specifically authorizes a larger contract.
Applies to: The head of a defense agency entering into multiyear contracts for services
What it requires
- Be guided by the listed principles when entering into a multiyear contract for services
- Make a written determination before entering into a multiyear contract for services
- Not initiate a multiyear contract for services if its value exceeds $900 million unless a law specifically provides authority
Key terms: multiyear contract · useful commercial life · plant or equipment · amortized · written determination
Written by AI from this section's text. A guide, not legal advice: the text below rules.
The text
(a) The head of the agency may enter into a multiyear contract for a period of not more than 5 years for the following types of services (and items of supply relating to such services), even though funds are limited by statute to obligation only during the fiscal year for which they were appropriated (10 U.S.C. 3531(a)). Covered services are—
(1) Operation, maintenance, and support of facilities and installations;
(2) Maintenance or modification of aircraft, ships, vehicles, and other highly complex military equipment;
(3) Specialized training requiring high-quality instructor skills (e.g., training for pilots and aircrew members or foreign language training);
(4) Base services (e.g., ground maintenance, in-plane refueling, bus transportation, and refuse collection and disposal); and
(5) Environmental remediation services for—
(i) An active military installation;
(ii) A military installation being closed or realigned under a base closure law as defined in 10 U.S.C. 2667(h)(2); or
(iii) A site formerly used by DoD (10 U.S.C. 3531(b)).
(b) The head of the agency must be guided by the following principles when entering into a multiyear contract for services:
(1) The portion of the cost of any plant or equipment amortized as a cost of contract performance should not exceed the ratio between the period of contract performance and the anticipated useful commercial life of the plant or equipment. As used in this section, “useful commercial life” means the commercial utility of the facilities rather than the physical life, with due consideration given to such factors as the location, specialized nature, and obsolescence of the facilities.
(2) Consider the desirability of obtaining an option to extend the term of the contract for a reasonable period not to exceed 3 years at prices that do not include charges for plant, equipment, or other nonrecurring costs already amortized.
(3) Consider the desirability of reserving the right to take title, under the appropriate circumstances, to the plant or equipment upon payment of the unamortized portion of the cost (10 U.S.C. 3531(c)).
(c) Before entering into a multiyear contract for services, the head of the agency must make a written determination that—
(1) There will be a continuing requirement for the services consistent with current plans for the proposed contract period;
(2) Furnishing the services will require—
(i) A substantial initial investment in plant or equipment; or
(ii) The incurrence of substantial contingent liabilities for the assembly, training, or transportation of a specialized work force; and
(3) Using a multiyear contract will promote the best interests of the United States by encouraging effective competition and promoting economies in operations (10 U.S.C. 3531(a)).
(d) The head of an agency may not initiate a multiyear contract for services if the value of the multiyear contract exceeds $900 million unless a law specifically provides authority for the contract (10 U.S.C. 3531(d)(2)).
← 217.170 General. · 217.172 Multiyear contracts for supplies. →
Rule changes for DFARS Part 217
- Defense Federal Acquisition Regulation Supplement: Mitigating Risks Related to Foreign Ownership, Control, or Influence (DFARS Case 2021-D011) ↗ · proposed 2026-05-07 · comments due 2026-07-06
- Defense Federal Acquisition Regulation Supplement: Assessing Contractor Implementation of Cybersecurity Requirements (DFARS Case 2019-D041) ↗ · final rule 2025-09-10 · effective 2025-11-10
- Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2024-D002) ↗ · final rule 2025-08-25 · effective 2025-10-01
- Defense Federal Acquisition Regulation Supplement: Inflation Adjustment of Acquisition-Related Thresholds (DFARS Case 2024-D002) ↗ · proposed 2025-01-17 · comments due 2025-03-18
- Defense Federal Acquisition Regulation Supplement; Technical Amendments ↗ · final rule 2025-01-17 · effective 2025-01-17
- Defense Federal Acquisition Regulation Supplement: Disclosure of Information Regarding Foreign Obligations (DFARS Case 2018-D064) ↗ · proposed 2024-11-15 · comments due 2025-01-14
- Defense Federal Acquisition Regulation Supplement: Data Universal Numbering System to Unique Entity Identifier Transition (DFARS Case 2022-D023) ↗ · final rule 2024-09-26 · effective 2024-10-01
- Defense Federal Acquisition Regulation Supplement: Assessing Contractor Implementation of Cybersecurity Requirements (DFARS Case 2019-D041) ↗ · proposed 2024-08-15 · comments due 2024-10-15
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Plain words for the terms: glossary.