A cost reimbursement contract is a contract type commonly used in government and defense contracting where a contractor is reimbursed for allowable costs incurred, plus an additional fee. For organizations working with federal agencies, understanding how a cost reimbursement contract works is essential for compliance, profitability, and audit readiness.
At RKI, we frequently support contractors navigating cost-reimbursable environments, including FAR compliance, incurred cost submissions, and DCAA audit support. This guide breaks down what you need to know.
What Is a Cost Reimbursement Contract?
A cost reimbursement contract (also known as a cost reimbursable contract) is a contract structure in which the contractor is paid for allowable, allocable, and reasonable costs incurred during project performance, along with a fee or profit component.
In simple terms:
- The contractor tracks actual project costs.
- The government (or client) reimburses those costs.
- The contractor receives an agreed-upon fee.
If you’ve ever asked, “What is a cost reimbursement agreement?” — it’s essentially the formal contract that defines how costs will be reimbursed, what qualifies as allowable, and how fees are calculated.
This structure is commonly used when:
- Project scope is uncertain.
- Technical requirements may evolve.(e.g, Research & Development)
- Costs cannot be accurately estimated upfront.
The Federal Acquisition Regulation (FAR) outlines the rules governing cost-reimbursable contracts in federal projects (see FAR Part 16 – Types of Contracts).
Key Components of a Cost Reimbursement Agreement
A well-structured cost reimbursement agreement includes several critical elements:
Allowable Costs
Costs must meet the standards of:
- Allowable pursuant to FAR 31 cost principles
- Allocable
- Reasonable
- Consistent with generally accepted accounting practices (GAAP)
Terms of the contract Common reimbursable costs include:
- Direct labor
- Materials
- Subcontractor costs
- Indirect expenses (overhead, G&A)
Improper cost classification is one of the most common compliance issues we see during DCAA reviews. If your accounting system isn’t structured properly, reimbursement delays or audit findings can follow.
Fee Structure
Unlike fixed-price contracts, profit in a cost reimbursement contract is typically defined as:
- Cost-Plus-Fixed-Fee (CPFF) – Fixed fee regardless of performance.
- Cost-Plus-Incentive-Fee (CPIF) – Fee varies based on performance targets.
- Cost-Plus-Award-Fee (CPAF) – Fee based on subjective evaluation criteria.
The chosen structure impacts cash flow, risk allocation, and compliance oversight.
Funding Limitations
Most cost reimbursable agreements include a funding ceiling. Contractors must monitor expenditure carefully to avoid exceeding authorized funding without modification.
Failure to properly monitor funding can result in:
- Disallowed costs
- Cash flow interruptions
- Increased audit scrutiny
Strong job costing and real-time financial reporting are non-negotiable.
How a Cost Reimbursable Contract Impacts Your Accounting System
A cost reimbursable environment requires a far more sophisticated accounting infrastructure than fixed-price work.
You must have:
- Segregation of direct and indirect costs
- Timekeeping controls
- Indirect rate calculations
- Proper allocation methodologies
- Audit-ready documentation
For federal contractors, this often means ensuring your system meets the criteria evaluated by DCAA during an accounting system audit. If you’re unsure where you stand, reviewing our guidance on DCAA audit expectations can help clarify expectations.
In some cases, contractors are asked to begin performance before final pricing and contract terms are fully negotiated. If that situation applies to you, our guide to Undefinitized Contract Actions explains how UCAs work, why they often function like cost-type contracts at the outset, and what contractors need to watch before definitization.
Without compliant systems in place, a cost reimbursement agreement can quickly become a liability instead of an opportunity.
Advantages of a Cost Reimbursement Contract
When structured and managed correctly, a cost reimbursement contract offers several advantages:
Reduced Pricing Risk
Since allowable costs are reimbursed, contractors face less risk from unforeseen cost increases.
Flexibility in Scope
These contracts are ideal for R&D or complex technical work where scope evolves.
Government Preference for High-Uncertainty Projects
Federal agencies often prefer cost reimbursable structures when outcomes are difficult to define upfront.
Disadvantages and Risks
Despite the benefits, cost reimbursement contracts carry compliance risk:
Heavy Documentation Requirements
You must maintain detailed records for:
- Labor distribution
- Indirect rate pools
- Expense allocations
- Subcontractor management
Audit Exposure
Cost reimbursable contracts often trigger:
- Incurred cost submissions
- DCAA audits including:
- Incurred Cost Audit
- Pre-Award Accounting System Audit
- Post Award Accounting System Audit
- Labor charging audits
- CAS audits (if applicable)
If your books aren’t ready, reimbursement delays or questioned costs are common.
Cash Flow Management Challenges
Reimbursement timing can create working capital strain if billing processes are inefficient.
If you’re preparing for an Incurred Cost Submission (ICS), proactive preparation is critical. You can review a detailed breakdown of the ICS process to better understand the steps, requirements, and common compliance considerations involved.
Fixed-Price vs. Cost Reimbursable Contracts
Understanding the distinction is essential:
| Fixed-Price Contract | Cost Reimbursement Contract |
| Set price | Reimbursement of actual costs |
| Higher contractor risk | Lower pricing risk |
| Less administrative burden | High compliance oversight |
| Profit depends on cost control | Fee structure defined upfront |
For contractors new to government work, jumping into a cost reimbursable agreement without proper accounting controls is a common mistake.
When Should You Use a Cost Reimbursement Agreement?
A cost reimbursement contract makes the most sense when:
- Project scope is undefined or evolving
- Technical risk is high
- Accurate cost estimating is difficult
- Government oversight is expected
However, before pursuing this contract type, evaluate:
- Is your accounting system compliant?
- Can you support provisional billing rates?
- Are your indirect rate calculations defensible?
- Do you have internal controls over timekeeping?
If the answer to any of these is unclear, strengthening your system should be your first step.
Compliance Drives Profitability
A cost reimbursement contract can be a strategic opportunity, but only if your financial infrastructure supports it. The reimbursement agreement structure shifts risk away from pricing, but it increases compliance expectations.
For government contractors, success under a cost reimbursable structure depends on:
- Clean cost segregation
- Accurate indirect rates
- Timely billing
- Audit-ready documentation
At RKI, we specialize in helping contractors build accounting systems that withstand DCAA scrutiny and support sustainable growth in federal markets.
Not sure if your contract or accounting system is set up correctly? Schedule a consultation with our team to identify gaps, reduce risk, and position your business for compliant, profitable growth.