FAR 36.501 Performance of Work by the Contractor Explainer
Federal construction solicitations require prime contractors to perform a defined portion of the project using their own labor. Under FAR 36.501, contracting officers must establish clear self-performance parameters on fixed-price projects. Understanding these requirements helps small general contractors and trade subcontractors align their bid scopes and avoid compliance errors before bid day.
The Regulatory Purpose of Self-Performance
Under FAR 36.501(a), the primary reason for requiring a contractor to perform a significant part of the contract work with its own forces is to assure adequate interest in and supervision of all work involved in larger projects. The government uses this rule to ensure that prime contractors do not simply broker out the entirety of a project to third parties without maintaining direct operational engagement on the job.
The contract expresses this mandate as a specific percentage representing the minimum amount of work that the contractor must perform with its own forces.
How the Contracting Officer Establishes the Percentage
The contracting officer determines the exact self-performance percentage inserted into the contract documents. According to the regulation, this percentage must be set as high as the contracting officer considers appropriate for the specific project, based on several mandatory criteria:
- The complexity of the work to be performed.
- The overall magnitude of the project.
- Customary or necessary specialty subcontracting for the project type.
- A standard floor that is ordinarily not less than 12 percent, unless a greater percentage is required by law or agency regulation.
Specialty Trade Exclusions from the Requirement
Estimators pricing specific trade packages must understand how their work is viewed under the regulation. FAR 36.501(a) explicitly identifies certain trade categories that are standardly handled by specialty subcontractors:
- Specialties such as plumbing, heating, and electrical work are recognized as usually subcontracted.
- These specific trades should not normally be considered by the contracting officer when establishing the amount of work required to be performed directly by the prime contractor.
This exclusion prevents the contracting officer from calculating self-performance targets against specialty trade scopes that general contractors do not customarily self-perform.
Contract Thresholds and Mandatory Clause Inclusion
FAR 36.501(b) establishes when the contracting officer is required to include the corresponding contract clause, FAR 52.236-1 (Performance of Work by the Contractor), in federal solicitations:
- Contracts exceeding $2 million: The contracting officer shall insert the clause when a fixed-price construction contract is contemplated and the contract amount is expected to exceed $2 million.
- Contracts of $2 million or less: The contracting officer may insert the clause when a fixed-price construction contract is contemplated and the contract amount is expected to be $2 million or less.
- Socioeconomic program exceptions: The requirement to insert the clause does not apply to contracts awarded pursuant to subparts 19.5, 19.8, 19.13, 19.14, or 19.15.
What These Rules Mean for Subcontractors and Small GCs
When preparing bids for federal work, prime contractors and trade subcontractors must coordinate early regarding scope divisions:
- Prime scope allocation: Because the prime must meet the minimum percentage (ordinarily not less than 12 percent), a general contractor cannot subcontract out all architectural, framing, or finish packages if it needs those scopes to fulfill its own self-performance quota.
- Subcontractor bid opportunities: Trade subcontractors reviewing federal solicitations should verify whether the prime contractor must comply with self-performance mandates. Reviewing solicitation clauses alongside our guide on FAR 52.236-1 self-performance helps subcontractors identify which trades the prime is legally required to keep in-house versus what can be bought out.
- Bid leveling considerations: Small GCs compiling trade numbers must verify that their subcontract awards leave sufficient direct labor on their books. Analyzing proposals with a structured method to level subcontractor bids ensures that the final prime bid complies with the required percentage.
Quick-Reference Summary of FAR 36.501
- Objective: Assures adequate contractor interest and supervision on larger projects.
- Measurement: Expressed as a minimum percentage of work performed by prime forces.
- Standard baseline: Ordinarily not less than 12 percent unless higher percentages are required by law or regulation.
- Trade carve-outs: Plumbing, heating, and electrical trades are usually subcontracted and normally excluded when setting the required percentage.
- Mandatory threshold: Solicitations and fixed-price contracts expected to exceed $2 million (unless awarded under subparts 19.5, 19.8, 19.13, 19.14, or 19.15).
- Discretionary threshold: Optional for fixed-price contracts expected to be $2 million or less.
Sources
Published October 29, 2026. No affiliate links on this page. Facts come from the sources linked above; check them for updates.