Last reviewed: April 2026
What Are the Four Types of Government Contracts?
The four types of government contracts are fixed-price, cost-reimbursement, time-and-materials, and indefinite-delivery/indefinite-quantity (IDIQ). These four contract types, governed by the Federal Acquisition Regulation (FAR) Part 16, define how the government pays contractors and how financial risk is distributed between the contracting agency and the performing business. Each type of government contract serves a different procurement scenario based on scope certainty, cost predictability, and performance requirements.
This page covers the four primary contract types used in federal government procurement under FAR Part 16. State and local government contracts often follow similar structures but are governed by jurisdiction-specific procurement codes rather than the FAR. This page does not cover contract vehicles (such as GSA Schedules or GWACs) or socioeconomic set-aside categories (such as 8(a) or HUBZone), which are award mechanisms rather than contract types.
How Do the Four Types of Government Contracts Work?
The four types of government contracts each establish a different payment structure and risk allocation between the federal agency and the contractor. The contracting officer selects the contract type before issuing the solicitation, based on how well the government can define the work scope and estimate costs.
Fixed-Price Contracts (FAR 16.2)
Fixed-price government contracts set a firm price for the work before performance begins. The contractor delivers the specified goods or services for an agreed amount, and if actual costs exceed the estimate, the contractor absorbs the loss. If costs come in under the estimate, the contractor keeps the savings as additional profit.
Fixed-price contracts are the most widely used type of government contract, representing approximately 66% of federal contract obligations. The FAR identifies several fixed-price variants:
- Firm Fixed-Price (FFP). The price does not adjust for any reason. Required for all commercial product procurements.
- Fixed-Price Incentive (FPI). Both parties share cost overruns and underruns through a negotiated formula, with a ceiling price the government will not exceed.
- Fixed-Price with Economic Price Adjustment (FP-EPA). Allows price adjustments tied to published indexes, established prices, or actual labor and material cost changes during extended-duration contracts.
- Fixed-Price Level-of-Effort (FP-LOE). The contractor provides a specified number of labor hours over a stated period for a fixed dollar amount, regardless of outcomes achieved.
Cost-Reimbursement Contracts (FAR 16.3)
Cost-reimbursement government contracts pay the contractor for all allowable costs incurred during performance, up to an agreed ceiling, plus an additional fee or profit. The government bears the primary financial risk because final costs are not known until the work is complete or a designated reconciliation date.
Cost-reimbursement contracts account for roughly 29-32% of total federal procurement spending. The FAR establishes these cost-reimbursement variants:
- Cost-Plus-Fixed-Fee (CPFF). The contractor receives all allowable costs plus a fixed fee that does not vary with actual costs. This is the most common cost-reimbursement variant.
- Cost-Plus-Incentive-Fee (CPIF). The fee adjusts through a formula based on the relationship between actual costs and a target cost, rewarding the contractor for cost control.
- Cost-Plus-Award-Fee (CPAF). The government evaluates contractor performance periodically and awards a discretionary fee based on subjective criteria such as quality, timeliness, and technical innovation.
- Cost Contract (no fee). The contractor receives only allowable costs with no profit. Used primarily for research with nonprofit organizations.
- Cost-Sharing Contract. The contractor agrees to absorb a portion of allowable costs, typically when the contractor expects commercial benefits from the work.
Time-and-Materials Contracts (FAR 16.6)
Time-and-materials (T&M) government contracts pay the contractor at negotiated hourly rates for labor plus actual costs for materials. The total price is not established at award and depends entirely on hours worked and materials consumed during performance.
T&M contracts present the highest risk to the government and the lowest risk to the contractor. The FAR requires a written determination that no other contract type is suitable before a T&M contract can be used. T&M contracts include a ceiling price that the contractor cannot exceed without a contract modification. A closely related variant, the labor-hour contract, works the same way but covers only labor costs with no materials component.
Indefinite-Delivery/Indefinite-Quantity Contracts (FAR 16.5)
Indefinite-delivery/indefinite-quantity (IDIQ) government contracts establish an umbrella agreement under which the government places individual task orders or delivery orders over a multi-year period. The government commits to a guaranteed minimum order quantity but retains flexibility on the total amount ordered up to a stated maximum.
IDIQ contracts are one of the most prevalent types of government contracts in use today. They allow the government to select fixed-price or cost-reimbursement pricing for each individual task order. When multiple contractors hold the same IDIQ contract, they compete against each other for individual orders, creating ongoing price and performance competition. FAR 16.504 requires agencies to prefer multiple-award IDIQ contracts unless a single award is more practical.
Why Do Government Contract Types Matter?
Government contract types matter because the contract type determines how much financial risk the contractor assumes and how profit is earned. Choosing the wrong contract type, or misunderstanding how a contract type allocates risk, is one of the most common reasons small businesses lose money on government work.
Government contract types affect three critical business decisions for contractors:
- Pricing strategy. Fixed-price contracts require accurate cost estimates before bidding. Underestimating costs on a firm fixed-price contract means the contractor absorbs the loss with no recourse. Cost-reimbursement contracts allow for more flexible pricing but require DCAA-compliant accounting systems to track allowable costs.
- Cash flow planning. Each government contract type creates a different payment pattern. Fixed-price contracts typically pay upon delivery or at milestones. Cost-reimbursement contracts reimburse costs periodically. T&M contracts pay based on hours billed. IDIQ contracts generate revenue only when the government issues task orders, making cash flow unpredictable.
- Accounting and compliance requirements. Cost-reimbursement and T&M government contracts require contractors to maintain accounting systems capable of segregating costs by contract, tracking direct and indirect rates, and withstanding government audit. Fixed-price contracts impose fewer accounting requirements because the government pays a set amount regardless of how the contractor manages internal costs.
- Profit potential and ceiling. Fixed-price government contracts offer the highest profit potential because any cost savings go directly to the contractor. Cost-reimbursement contracts cap profit through negotiated fees. T&M contracts limit earnings to the margin built into hourly labor rates.
Understanding which type of government contract applies to a given opportunity allows contractors to make informed bid/no-bid decisions, set realistic pricing, and structure their accounting and compliance systems accordingly.
How Do the Four Types of Government Contracts Compare?
The four types of government contracts differ across five dimensions that matter most to contractors: risk allocation, pricing certainty, accounting burden, profit potential, and typical use cases.
| Dimension | Fixed-Price | Cost-Reimbursement | Time & Materials | IDIQ |
|---|---|---|---|---|
| Risk to contractor | High (absorbs all cost overruns) | Low (costs reimbursed up to ceiling) | Minimal (paid for hours and materials) | Varies by task order type |
| Risk to government | Low (price locked in) | High (final cost unknown) | Highest (no scope/cost certainty) | Moderate (spread across orders) |
| Price certainty at award | Full price known | Estimated, final cost TBD | Ceiling only, actual cost TBD | Min/max range, per-order pricing |
| Accounting requirements | Standard business accounting | DCAA-adequate system required | Detailed time and material tracking | Depends on order type |
| Profit potential | Highest (keep all savings) | Capped by negotiated fee | Limited to labor rate margin | Varies by order type |
| FAR reference | Subpart 16.2 | Subpart 16.3 | Subpart 16.6 | Subpart 16.5 |
| Typical use | Construction, production, commercial items | R&D, complex services, uncertain scope | IT support, maintenance, advisory | Recurring services, IT, professional services |
The contracting officer selects among these four government contract types based on the level of scope definition, cost predictability, urgency, and available competition. FAR 16.104 establishes a preference for fixed-price contracts whenever feasible. Cost-reimbursement contracts require a written determination that a fixed-price contract is not suitable, and T&M contracts require an additional finding that no other contract type will work.
Examples of Each Government Contract Type in Practice
The four types of government contracts apply to different procurement scenarios. The following examples show how each contract type works in a real federal contracting context.
Fixed-Price: Office Furniture Supply. The General Services Administration awards a firm fixed-price contract for 500 ergonomic desks at $1,200 each, totaling $600,000. The contractor delivers all desks within 90 days and receives the full contract price regardless of whether raw material costs increase after award. If the contractor sources materials for $900 per desk, the $300-per-unit margin becomes profit. If costs rise to $1,400 per desk, the contractor absorbs the $200-per-unit loss.
Cost-Reimbursement: Cybersecurity Research. The Department of Defense awards a cost-plus-fixed-fee contract to a technology firm to research next-generation encryption algorithms. The estimated cost is $2.5 million with a fixed fee of $200,000 (8%). The contractor submits monthly cost vouchers for allowable expenses including researcher salaries, lab equipment, and travel. If actual costs reach $2.8 million, the government reimburses the full amount but the fee stays at $200,000, reducing the effective profit rate to 7.1%.
Time-and-Materials: IT Help Desk Support. A civilian agency awards a T&M contract for help desk staffing at $85 per hour for Tier 1 technicians and $120 per hour for Tier 2 specialists, with a contract ceiling of $1.2 million over 12 months. The contractor bills actual hours worked each month. If call volume drops unexpectedly, the contractor bills fewer hours and earns less revenue. The contractor bears no risk for fluctuating demand but must stop work if the ceiling is reached without a modification.
IDIQ: Professional Engineering Services. The Army Corps of Engineers awards a five-year, multiple-award IDIQ contract to eight engineering firms with a guaranteed minimum of $50,000 per awardee and a shared ceiling of $500 million. Individual task orders for bridge inspections, environmental assessments, and design reviews are competed among the eight firms. Each task order specifies whether it is fixed-price or cost-reimbursement based on the complexity of the specific project.
Which Government Contract Type Fits Your Business?
The type of government contract attached to a solicitation determines what kind of risk your business takes on and what accounting infrastructure you need in place before bidding. Not every contractor is positioned to perform under every contract type.
| A good fit for your business if… | Not a fit for your business if… |
|---|---|
| You can estimate costs accurately and want maximum profit potential (fixed-price) | You have no historical cost data for the type of work being solicited |
| You have a DCAA-adequate accounting system and can track allowable costs (cost-reimbursement) | Your accounting system cannot segregate costs by contract or distinguish direct from indirect expenses |
| You can provide skilled labor at competitive hourly rates with margin built in (T&M) | Your labor costs are higher than the rates the government is willing to negotiate |
| You can sustain operations during gaps between task orders (IDIQ) | Your business depends on a single large contract for cash flow stability |
| You have the capacity to compete on individual task orders against other awardees (IDIQ) | You lack the proposal writing resources to respond to frequent task order competitions |
Small businesses entering federal contracting for the first time typically start with fixed-price contracts because the accounting requirements are simpler and the scope is clearly defined. Pursuing cost-reimbursement or T&M government contracts usually requires an established accounting system and familiarity with government audit requirements.
Limitations and Risks of Each Government Contract Type
Each of the four types of government contracts carries specific limitations that contractors should evaluate before submitting a proposal.
- Fixed-price contracts penalize inaccurate estimates. If a contractor underestimates labor hours, material costs, or subcontractor expenses on a firm fixed-price government contract, the contractor must complete the work at a financial loss. There is no mechanism to increase the price after award unless the government changes the scope through a formal contract modification.
- Cost-reimbursement contracts require expensive compliance infrastructure. Contractors performing under cost-reimbursement government contracts must maintain accounting systems that meet DCAA adequacy standards, track direct and indirect costs separately, and demonstrate that all billed costs are allowable, allocable, and reasonable under FAR Part 31. Building and maintaining this infrastructure costs $20,000 to $100,000 or more annually for small businesses.
- T&M contracts offer no guarantee of volume. A time-and-materials government contract obligates the contractor to provide labor and materials at agreed rates, but the government is not required to use the contractor for any minimum number of hours beyond the contract’s guaranteed minimum. Revenue depends entirely on demand.
- IDIQ contracts create feast-or-famine cash flow. Holding an IDIQ government contract does not guarantee revenue beyond the stated minimum (which can be as low as $2,500). The government may concentrate task orders with one or two preferred contractors, leaving other awardees with minimal work despite holding the same contract vehicle.
- Contract type selection is not the contractor’s choice. The contracting officer determines the contract type before the solicitation is issued. Contractors cannot negotiate to change a fixed-price requirement to cost-reimbursement. The contractor’s only decision is whether to bid on the opportunity as structured.
- Multi-year contracts expose contractors to inflation risk. Fixed-price and T&M government contracts spanning multiple years lock in pricing that may not keep pace with rising labor and material costs. Fixed-price contracts with economic price adjustment clauses provide some protection, but not all solicitations include these provisions.
Common Misconceptions About Government Contract Types
Government contract types are frequently misunderstood by new contractors and by businesses transitioning from commercial work to federal procurement.
Misconception: Cost-reimbursement government contracts guarantee the contractor will not lose money.
Reality: Cost-reimbursement contracts reimburse only allowable costs. If the government audits a contractor’s cost submissions and disallows certain expenses (such as entertainment, lobbying, or unallocable overhead), the contractor absorbs those costs. Contractors can also lose money if actual costs exceed the contract ceiling and the government declines to add funding.
Misconception: IDIQ government contracts are guaranteed revenue streams for the full contract ceiling.
Reality: The government’s obligation on an IDIQ contract extends only to the guaranteed minimum, which is often a fraction of the stated ceiling. A contractor awarded an IDIQ with a $50 million ceiling and a $5,000 guaranteed minimum may receive only $5,000 in orders over the entire contract period if no task orders are directed to that contractor.
Misconception: T&M government contracts let contractors bill unlimited hours at high rates.
Reality: T&M contracts include a ceiling price that cannot be exceeded without a written modification. Hourly rates are negotiated before award and must be fair and reasonable based on the contractor’s actual compensation structure. The government actively monitors T&M hours and can reduce or terminate the contract if usage appears excessive relative to deliverables.
Misconception: Contractors can choose which type of government contract they want.
Reality: The contracting officer determines the contract type based on FAR 16.104 factors including price competition, cost analysis reliability, requirement type, urgency, and risk assessment. The contractor’s role is to evaluate the contract type and decide whether to bid, not to select or negotiate the type.
Frequently Asked Questions About Government Contract Types
What is the most common type of government contract?
Fixed-price contracts are the most common type of government contract, accounting for approximately 66% of total federal contract obligations. Firm fixed-price (FFP) is the dominant variant because the FAR requires its use for commercial product procurements and establishes a general preference for fixed-price contracts whenever the government can adequately define the scope of work.
Which type of government contract is best for small businesses?
Fixed-price government contracts are typically best for small businesses entering federal contracting because they require only standard business accounting systems and clearly defined deliverables. Small businesses should avoid cost-reimbursement contracts until they have a DCAA-adequate accounting system, which costs $20,000 to $100,000 or more to establish. IDIQ contracts can benefit small businesses that have the proposal capacity to compete on individual task orders.
What is the difference between an IDIQ contract and a blanket purchase agreement (BPA)?
An IDIQ government contract is a standalone contract type under FAR 16.5 that establishes terms for ordering unspecified quantities of supplies or services within stated minimum and maximum limits. A blanket purchase agreement is a simplified purchasing method under FAR 13.303 used for repetitive purchases of supplies or services from a single source. BPAs are generally used for lower-value, routine purchases, while IDIQ contracts are used for larger, more complex procurements.
Can a government contract change types after award?
Government contracts generally do not change types after award. The contract type is a fundamental term established during the solicitation process. In rare cases, a contracting officer may convert a letter contract (a preliminary agreement under FAR 16.603) into a definitive fixed-price or cost-reimbursement contract. However, converting an existing fixed-price contract to cost-reimbursement, or vice versa, is not a standard practice and would require extraordinary justification.
What accounting system do I need for cost-reimbursement government contracts?
Cost-reimbursement government contracts require an accounting system that meets DCAA adequacy standards. The system must segregate direct costs by contract, accumulate indirect costs in appropriate pools, distinguish between allowable and unallowable costs under FAR Part 31, and provide a basis for allocating indirect costs to individual contracts. Many small businesses use government-contracting-specific ERP software such as Unanet, Deltek Costpoint, or Procas to meet these requirements.
What does FAR Part 16 say about selecting contract types?
FAR Part 16 establishes a hierarchy that favors fixed-price contracts. Section 16.104 lists factors the contracting officer must consider: price competition, price analysis, type and complexity of the requirement, urgency, period of performance, contractor technical capability, and adequacy of the contractor’s accounting system. Cost-reimbursement contracts require a written determination under FAR 16.301 that a fixed-price contract is not suitable, and T&M contracts require an additional determination under FAR 16.601 that no other type will work.
How are government contract types different from contract vehicles?
Government contract types (fixed-price, cost-reimbursement, T&M, IDIQ) define the pricing and risk structure of the agreement. Contract vehicles (such as GSA Schedules, GWACs, and BPAs) are procurement mechanisms that streamline how the government awards and administers contracts. A GSA Schedule, for instance, is a contract vehicle that typically uses fixed-price terms. The contract type determines payment structure; the vehicle determines the acquisition pathway.