FAR 16.405—Cost-reimbursement incentive contracts.
Plain-English Summary
FAR 16.405 is the cost-reimbursement incentive contract section, and it explains how incentive arrangements work when the Government pays allowable costs and also uses a formula to reward or penalize performance. It must be read together with FAR 16.301, which contains the baseline requirements for all cost-reimbursement contracts, because the incentive rules build on those general principles. In practice, this section addresses when a contracting officer may use a cost-reimbursement incentive contract, how the incentive structure is tied to actual cost performance, and how the contract should be designed so the contractor has a meaningful financial motive to control costs while still meeting technical and schedule needs. The section is important because it gives agencies a way to share risk and motivate better performance without moving to a fixed-price structure that may be inappropriate when costs cannot be estimated with enough certainty. For contractors, it defines how target cost, target profit, and the incentive formula affect final fee or profit, and it signals that careful cost control and documentation directly affect compensation. For contracting officers, it is a planning and negotiation tool that requires disciplined structuring of the incentive arrangement so the contract is fair, understandable, and administrable.
Key Rules
Use with FAR 16.301
This section does not stand alone; the general requirements for all cost-reimbursement contracts in FAR 16.301 also apply. The contracting officer must therefore ensure the contract is otherwise appropriate for cost-reimbursement treatment before adding an incentive structure.
Incentive tied to cost performance
A cost-reimbursement incentive contract uses a formula that adjusts the contractor’s fee or profit based on actual allowable cost performance against a negotiated target. The basic purpose is to motivate the contractor to control costs, because lower-than-target costs can increase the contractor’s compensation and higher-than-target costs can reduce it.
Target cost and target profit matter
The incentive arrangement must be built around negotiated target cost and target profit or fee, along with the formula that determines how final profit or fee changes as actual costs vary from the target. These negotiated elements are central to the contract’s operation and must be clear enough to support administration and settlement.
Risk sharing is intentional
The contract is designed to share cost risk between the Government and the contractor rather than placing all risk on one side. The incentive formula should be structured so the contractor has a real economic reason to manage costs, but the Government still retains the flexibility that cost-reimbursement contracting is meant to provide.
Administration depends on actual costs
Final compensation depends on the contractor’s actual allowable costs, so accurate accounting, timely cost reporting, and proper allowability determinations are essential. The contracting officer and contract administration personnel must be able to verify the cost data used to apply the incentive formula.
Responsibilities
Contracting Officer
Determine that a cost-reimbursement incentive contract is appropriate, ensure FAR 16.301 requirements are satisfied, negotiate the target cost and incentive arrangement, and structure the formula so it provides a meaningful cost-control incentive and is administratively workable.
Contractor
Perform the work while controlling costs, maintain accurate and supportable cost records, report actual costs as required, and understand that final fee or profit will be adjusted based on the incentive formula and allowable cost performance.
Agency
Support acquisition planning and oversight so the incentive arrangement matches the program’s risk profile and performance objectives, and ensure contract administration resources are available to evaluate actual costs and apply the incentive terms correctly.
Contract Administration/Finance Personnel
Review incurred costs, verify allowability and accuracy, support application of the incentive formula, and help ensure final fee or profit is settled based on reliable cost data.
Practical Implications
This section matters most when the Government wants cost control incentives but cannot use a fixed-price contract because the work is too uncertain or complex.
A common pitfall is negotiating an incentive formula that is too weak, too complicated, or too disconnected from the contractor’s actual ability to influence costs, which can make the incentive ineffective.
Another risk is poor cost documentation: because final compensation depends on actual allowable costs, weak accounting systems or late cost data can delay settlement and create disputes.
Contracting officers should make sure the target cost, target profit, and adjustment formula are clearly written and understood before award, since ambiguity can lead to administration problems later.
Contractors should watch the relationship between allowable costs and final fee carefully, because cost overruns can directly reduce profit even though the contract is not fixed-price.
Official Regulatory Text
See 16.301 for requirements applicable to all cost-reimbursement contracts, for use in conjunction with the following subsections.