A firm-fixed-price contract is a federal contract that locks in the total price before work begins and holds that price steady regardless of what the contractor actually spends to perform. The contractor keeps any savings as extra profit and absorbs any overruns as a loss. That structure gives the government cost certainty and pushes financial risk onto the contractor, which is why the Federal Acquisition Regulation names it the preferred contract type when performance risks are minimal or predictable.1Acquisition.GOV. FAR 16.103 Negotiating Contract Type
How the Price Stays Fixed
The FAR describes the arrangement as one where the price “is not subject to any adjustment on the basis of the contractor’s cost experience in performing the contract,” and it places on the contractor “maximum risk and full responsibility for all costs and resulting profit or loss.”2Acquisition.GOV. FAR Subpart 16.2 Fixed-Price Contracts – Section: 16.202-1 Description The parties negotiate a price up front, and the contractor delivers the required supplies or services for that amount no matter what happens to labor rates, material prices, or its own efficiency along the way.
The whole approach depends on the government providing a clear specification or statement of work before soliciting bids. Without a well-defined deliverable, a fixed price is just a guess. When the specification is solid, bidders can price accurately and the winning contractor enters the deal knowing what’s expected and roughly what it will cost to produce.
When Agencies Use This Contract Type
Firm-fixed-price contracts fit situations where the government can establish a fair and reasonable price before performance starts. FAR 16.202-2 points to four conditions that support that determination: adequate price competition among multiple bidders; prior competitive purchases of the same or similar items that give a pricing baseline; available cost or pricing data that permits realistic estimates; and performance uncertainties that the contractor can quantify and accept at a firm price.3Acquisition.GOV. FAR 16.202-2 Application All four point in the same direction. Both sides need enough information to settle on a price that’s fair.
Commercial Products and Services
For commercial products and commercial services, the FAR goes further than preference. Agencies are required to use either a firm-fixed-price contract or a fixed-price contract with economic price adjustment, with only narrow exceptions.4Acquisition.GOV. FAR 12.207 Contract Type If an item already sells in the commercial market, competition among commercial buyers has already established its price, and the government sees no reason to accept cost uncertainty. Standard office supplies, commercial software licenses, and widely available maintenance services all sit in this category.
Routine Services and Stable Markets
Beyond commercial items, this contract type works well for services where the scope is well-understood and cost inputs are stable. Janitorial work, grounds maintenance, equipment calibration, and similar recurring tasks involve predictable labor hours and material costs. Contractors in these industries bid confidently because they’ve done the work many times before. The government avoids the administrative overhead of auditing actual costs after the fact.
Who Carries the Risk
The contractor carries essentially all of it. If the work costs less than the contract price, the contractor pockets the difference. If it costs more, the contractor absorbs the loss. The government has no obligation to raise the price because the contractor underestimated its costs or ran into operational problems.2Acquisition.GOV. FAR Subpart 16.2 Fixed-Price Contracts – Section: 16.202-1 Description
That risk creates a strong incentive. A contractor that finds a cheaper material, streamlines production, or finishes ahead of schedule keeps every dollar it saves. FAR 16.103 puts it plainly: the structure “best utilizes the basic profit motive of business enterprise.”1Acquisition.GOV. FAR 16.103 Negotiating Contract Type
The downside is just as real. A contractor that underbids, hits supply chain disruptions, or misjudges the complexity of the work has no contractual path to ask for more money based on cost experience alone. Most disputes on this contract type trace back to that pressure: a contractor performing at a loss searches for any contractual hook to recover additional funds, and the government pushes back because the point of the arrangement is price certainty.
When the Price Can Still Change
“Fixed price” doesn’t mean the price can never move. It means the price cannot move because the contractor’s costs turned out differently than expected. Several standard clauses do allow adjustments when the government changes the deal or when conditions turn out to be materially different from what both parties anticipated.
The Changes Clause
Under FAR 52.243-1, the contracting officer can issue a written order directing changes within the general scope of the contract. For supply contracts, allowable changes include modifications to drawings, designs, or specifications for specially manufactured items; changes to shipping method or packing; and changes to the delivery point.5Acquisition.GOV. FAR 52.243-1 Changes Fixed-Price
When a directed change increases or decreases the cost or time of performance, the contracting officer must make an equitable adjustment to the price, the delivery schedule, or both. The word “equitable” is doing real work. The adjustment compensates for the impact of the government’s change, not for the contractor’s general cost overruns on unchanged work. Without a written modification, the original price stands.
Differing Site Conditions
Construction contracts typically include the Differing Site Conditions clause at FAR 52.236-2. It covers two situations: subsurface or hidden physical conditions at the job site that differ materially from what the contract documents indicated, and unknown conditions of an unusual nature that differ materially from what anyone would normally expect for that type of work.6Acquisition.GOV. FAR 52.236-2 Differing Site Conditions The contractor must notify the contracting officer in writing before disturbing the conditions, and if the difference genuinely affects cost or schedule, an equitable adjustment follows.
Excusable Delays
A contractor is not in default when a failure to perform results from causes beyond its control and without its fault or negligence. The FAR lists acts of God, government actions in a sovereign or contractual capacity, fires, floods, epidemics, quarantine restrictions, strikes, freight embargoes, and unusually severe weather.7eCFR. 48 CFR 52.249-14 Excusable Delays When the contracting officer accepts a delay as excusable, the delivery schedule shifts. The contractor is protected from default termination and liquidated damages for that period. The price still doesn’t change. Only the timeline does.
Getting Paid During Performance
A firm-fixed-price contract doesn’t always mean the contractor waits until final delivery to be paid. Two financing mechanisms allow payments while work is underway.
Progress Payments
Progress payments reimburse the contractor for a percentage of costs already incurred. The standard rate is 80 percent of total costs incurred, and 85 percent for small business concerns.8eCFR. 48 CFR 32.501-1 Customary Progress Payment Rates Any rate above those thresholds is an “unusual progress payment” and requires advance agency approval. The gap between the payment rate and 100 percent protects the government if the contractor defaults before finishing.
Performance-Based Payments
Performance-based payments are the government’s preferred financing method when practical. Rather than reimbursing incurred costs, they tie payments to specific milestones or measurable performance criteria such as completing a design review, delivering a prototype, or passing a system test. Each triggering event must represent a real, verifiable part of contract performance. Routine occurrences like signing a modification or the passage of time do not qualify.9Acquisition.GOV. FAR 32.1004 Procedures
Performance-based payments cannot be used for cost-reimbursement line items, architect-engineer or construction contracts that already use percentage-of-completion progress payments, or contracts awarded through sealed bidding.10eCFR. 48 CFR 32.1001 Policy Like progress payments, they are fully recoverable if the contractor defaults.
When This Contract Type Is a Poor Fit
The features that make firm-fixed-price attractive in stable environments make it hazardous when the work is uncertain. Research and development is the classic example. The FAR warns that the “absence of precise specifications and difficulties in estimating costs with accuracy normally precludes using fixed-price contracting for R&D.”11eCFR. 48 CFR 35.006 Contracting Methods and Contract Type Cost-reimbursement contracts are the usual choice for R&D because neither side can reliably estimate costs when the technical outcome is unknown. Fixed-price work still shows up in R&D for short-duration efforts with a tightly defined scope, and projects headed for eventual production commonly move from cost-reimbursement early on to fixed-price once the design matures and risks drop.
Unstable markets create a similar problem. If labor rates or material costs are likely to swing over a long performance period, forcing a firm price either inflates the bid with contingency padding or sets the contractor up to lose money. In those situations, the government often turns to a close relative of the firm-fixed-price contract: the fixed-price contract with economic price adjustment. That contract type builds in a mechanism for the price to move up or down based on specified economic variables, and it’s appropriate when there is serious doubt about the stability of market or labor conditions over the performance period.12Acquisition.GOV. FAR 16.203-2 Application Contracting officers must verify that the base price doesn’t already include contingency allowances that would be duplicated by the adjustment mechanism.
How the Contract Can End Early
A firm-fixed-price contract can end early in two very different ways, with very different consequences.
Termination for Default
When a contractor fails to deliver on time, perform according to contract terms, or make adequate progress, the government may terminate for default. The contractor then becomes liable for excess reprocurement costs: if the government has to buy the same supplies or services elsewhere at a higher price, the original contractor pays the difference.13eCFR. 48 CFR 52.249-8 Default (Fixed-Price Supply and Service) Contractors are not liable when the failure was caused by circumstances beyond their control and without their fault or negligence, tracking the same list of excusable causes described earlier. If a subcontractor’s failure caused the default, the contractor gets that protection only if the cause was beyond both parties’ control and the supplies or services weren’t available from alternative sources in time.
Termination for Convenience
The government can also terminate for its own convenience at any time, without the contractor having done anything wrong. The contractor is entitled to compensation for work already performed. If the parties agree on a settlement, it may include a reasonable allowance for profit on completed work, though the total cannot exceed the original contract price minus prior payments and the value of any work not terminated.14eCFR. 48 CFR 52.249-2 Termination for Convenience of the Government (Fixed-Price) Without agreement, the contracting officer pays the contract price for completed and accepted items, costs incurred on the terminated work, a fair and reasonable profit on those costs, and reasonable settlement expenses. One catch: if the contractor was heading toward a loss on the overall contract had performance continued, the contracting officer allows no profit and reduces the settlement to reflect the projected rate of loss.
Pursuing a Claim
Disagreements over equitable adjustments, termination settlements, or other performance issues follow the Contract Disputes Act. A contractor must submit any claim in writing to the contracting officer. Claims over $100,000 must be certified. The contracting officer issues a written decision with reasons and appeal rights. For claims of $100,000 or less, the decision must come within 60 days if the contractor requests it. For larger claims, the contracting officer has 60 days to either issue a decision or notify the contractor when one will be issued. If the contracting officer fails to decide in the required time, the law treats that silence as a denial and the contractor can proceed to appeal.15Office of the Law Revision Counsel. 41 USC 7103 Decision by Contracting Officer
The contracting officer’s decision is final unless the contractor appeals to the relevant agency Board of Contract Appeals or files suit in the U.S. Court of Federal Claims. Under a firm-fixed-price contract, that formal path is the only route to recover money the contractor believes is owed. Informal negotiation does not override a final decision. The contractor either accepts it or appeals it.