Title 41, Public ContractsRelease 119-110

§3905 Cost Contracts

Title 41 › Subtitle I — Federal Procurement Policy › CHAPTER 39 — SPECIFIC TYPES OF CONTRACTS › § 3905

Last updated Sep 22, 2026|Official source

Summary

Bans contracts that pay a percentage of the contractor’s costs. For contracts that pay a fixed fee on top of costs, the fee can’t be more than 10% of the contract’s estimated cost (not counting the fee). For experimental, developmental, or research work the cap is 15%. For architectural or engineering work on public works or utility projects the cap is 6% and may include the contractor’s costs. The agency head sets the estimated cost when the contract starts. Contractors must tell the agency ahead of time about any cost-plus-fixed-fee subcontracts and about any fixed-price subcontract or purchase order that is larger than the simplified acquisition threshold or more than 5% of the prime contract’s estimated cost. The agency can inspect plans and audit the books and records of prime contractors and subcontractors on cost or cost-plus-fixed-fee contracts.

Full Legal Text

Title 41, §3905

Public Contracts, Source: USLM XML via OLRC

(a)Cost-Plus-A-Percentage-Of-Cost Contracts Disallowed.—
The cost-plus-a-percentage-of-cost system of contracting shall not be used.
(b)Cost-Plus-A-Fixed-Fee Contracts.—
(1)In general.—
Except as provided in paragraphs (2) and (3), the fee in a cost-plus-a-fixed-fee contract shall not exceed 10 percent of the estimated cost of the contract, not including the fee, as determined by the agency head at the time of entering into the contract.
(2)Experimental, developmental, or research work.—
The fee in a cost-plus-a-fixed-fee contract for experimental, developmental, or research work shall not exceed 15 percent of the estimated cost of the contract, not including the fee.
(3)Architectural or engineering services.—
The fee in a cost-plus-a-fixed-fee contract for architectural or engineering services relating to any public works or utility project may include the contractor’s costs and shall not exceed 6 percent of the estimated cost, not including the fee, as determined by the agency head at the time of entering into the contract, of the project to which the fee applies.
(c)Notification.—
All cost and cost-plus-a-fixed-fee contracts shall provide for advance notification by the contractor to the procuring agency of any subcontract on a cost-plus-a-fixed-fee basis and of any fixed-price subcontract or purchase order which exceeds in dollar amount either the simplified acquisition threshold or 5 percent of the total estimated cost of the prime contract.
(d)Right To Audit.—
A procuring agency, through any authorized representative thereof, has the right to inspect the plans and to audit the books and records of a prime contractor or subcontractor engaged in the performance of a cost or cost-plus-a-fixed-fee contract.

Legislative History

Notes & Related Subsidiaries

Historical and Revision Notes

Revised SectionSource (U.S. Code)Source (Statutes at Large) 3905(a)41:254(b) (1st sentence words before 1st comma).June 30, 1949, ch. 288, title III, § 304(b), 63 Stat. 395; July 12, 1952, ch. 703, § 1(m), 66 Stat. 594; Pub. L. 103–355, title I, § 1071, title IV, § 4402(c), title X, § 10005(e), Oct. 13, 1994, 108 Stat. 3270, 3349, 3408. 3905(b)41:254(b) (1st sentence words after 1st comma). 3905(c)41:254(b) (last sentence words before semicolon). 3905(d)41:254(b) (last sentence words after semicolon).

Reference

Citations & Metadata

Citation

41 U.S.C. § 3905

Title 41, Public Contracts

Last Updated

Sep 22, 2026

Release point: 119-110