Fixed-Price Contracts (FFP) vs Cost-Plus Contracts (CPFF/CPIF)
Compare fixed price and cost-plus government contract types. Learn the risks, rewards, and best uses for FFP, CPFF, CPIF, and other pricing structures in federal contracting.
Fixed-price contracts establish a set price for the entire scope of work before performance begins. The contractor receives the agreed amount regardless of actual costs incurred. This includes Firm-Fixed-Price (FFP), Fixed-Price Incentive (FPI), and Fixed-Price with Economic Price Adjustment (FP-EPA). Fixed-price contracts shift cost risk to the contractor but offer higher profit potential for efficient performers.
Cost-reimbursement contracts pay the contractor for all allowable costs incurred plus a fee (profit). Common types include Cost-Plus-Fixed-Fee (CPFF), Cost-Plus-Incentive-Fee (CPIF), and Cost-Plus-Award-Fee (CPAF). Cost-plus contracts shift cost risk to the government and are used when requirements are uncertain or technical risk is high. They require approved accounting systems and more government oversight.
| Feature | Fixed-Price | Cost-Plus |
|---|---|---|
| Cost Risk | Contractor | Government |
| Profit Potential | Higher | Fixed/Limited |
| Accounting Requirements | Minimal | DCAA-Approved |
| Government Oversight | Minimal | Extensive |
| Flexibility to Changes | Low | High |
| Best for Defined Scope | Yes | No |
| Best for R&D/Uncertainty | No | Yes |
| Administrative Burden | Lower | Higher |
| Cash Flow Predictability | Depends on Estimate | Cost-Based |
| Small Business Friendly | Yes | Harder (system req) |
Pros
- +Higher profit potential with efficient execution
- +Predictable revenue for business planning
- +Less government oversight and audit exposure
- +Simpler administration and billing
- +No cost accounting system requirements initially
- +Faster payment without cost verification
- +Government prefers (easier to budget)
- +Incentivizes efficiency and innovation
Cons
- -Cost overruns come from contractor profit/pocket
- -Scope changes are difficult to price
- -Requirement ambiguity creates risk
- -Must accurately estimate costs upfront
- -Cash flow risk if costs exceed projections
- -Less flexibility during performance
- -Risk of loss on poorly estimated work
- -Scope creep disputes more common
Pros
- +Costs are reimbursed regardless of outcome
- +Lower financial risk during performance
- +Flexibility to address changing requirements
- +Appropriate for R&D and uncertain scope
- +Can adjust approach as you learn
- +Less pressure to cut corners
- +Better for complex, first-of-kind work
- +Cash flow less dependent on estimates
Cons
- -Requires DCAA-approved accounting system
- -Heavy government oversight and audit rights
- -Lower profit margins than fixed-price potential
- -Extensive documentation and timekeeping required
- -Cost proposals more complex
- -Payment delays for cost verification
- -Government may challenge costs as unallowable
- -Fee ceilings limit profit potential
Fixed-price and cost-plus contracts serve different purposes and match different types of work. Fixed-price works well for clearly defined requirements where the contractor can accurately estimate costs - the efficiency incentive benefits both parties. Cost-plus is appropriate for R&D, uncertain scope, or first-of-kind work where cost estimation is unreliable. Most contractors encounter both types and should understand the risk profiles and administration requirements of each.
Choose Fixed-Price Contracts (FFP) if you:
- Requirements are well-defined and stable
- Have experience estimating similar work
- Want simpler administration and billing
- Do not have DCAA-approved accounting system
- Confident in execution efficiency
Choose Cost-Plus Contracts (CPFF/CPIF) if you:
- Requirements are uncertain or evolving
- Technical risk is high (R&D, prototypes)
- First-time or novel work
- Have approved cost accounting system
- Need flexibility during performance
What does FFP mean in government contracting?
FFP stands for Firm-Fixed-Price. It is the most common contract type where the price is set at contract award and does not change regardless of the contractor's actual costs. If you complete the work for less than the contract price, you keep the difference as profit. If costs exceed the price, you absorb the loss.
What is a DCAA-approved accounting system?
DCAA (Defense Contract Audit Agency) approves contractor accounting systems for cost-reimbursement contracts. An approved system properly tracks direct and indirect costs, allocates overhead, and complies with Cost Accounting Standards. Getting DCAA approval can take 6-12+ months and requires specific accounting practices that small businesses may not have initially.
Can I do cost-plus contracts without a DCAA-approved system?
Generally no. Cost-reimbursement contracts require an adequate accounting system to track costs. For small contracts or when working as a subcontractor, requirements may be less strict, but direct prime contracts over the simplified acquisition threshold typically require an approved system before award.
What is a Time and Materials (T&M) contract?
T&M is a hybrid contract type where you are paid for labor hours at fixed rates plus materials at cost. It falls between fixed-price (fixed labor rates) and cost-plus (reimbursed materials). T&M is used when scope is uncertain but labor categories are defined. It has a ceiling price not to exceed. Many IT services contracts use T&M.
Which contract type is riskier for contractors?
Fixed-price contracts carry more financial risk because cost overruns reduce profit or cause losses. However, cost-plus contracts have compliance and audit risks - the government can disallow costs, and heavy oversight creates administrative burden. Risk type differs, but experienced contractors often prefer fixed-price for the profit potential and simpler administration.
How do I price a fixed-price contract?
Fixed-price proposals require accurate cost estimation including labor, materials, overhead, G&A, and profit margin with contingency for unknowns. Common approach: estimate realistic costs, add contingency for risk (10-20%+ depending on uncertainty), then add target profit margin. Under-pricing is dangerous - once the price is set, overruns are your loss. Build in appropriate risk reserves.
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