You won a government contract. Your direct costs are solid. Then the contracting officer asks for your indirect rate schedule, and suddenly you are staring at a spreadsheet wondering whether your fringe rate includes PTO, whether your rent belongs in overhead or G&A, and whether the numbers you submit will survive a DCAA (Defense Contract Audit Agency) audit.
You are not alone. Indirect rate calculation is one of the most misunderstood areas of government contract accounting. Getting it wrong has real consequences: mispriced proposals, disallowed costs, and audit findings that threaten your contracts.
Most cost-reimbursement contractors organize indirect costs into three pools: fringe, overhead, and G&A. FAR 31.203(c) requires logical cost groupings, not a specific pool count; the three-pool structure is common practice for cost-reimbursement contractors, not a regulatory mandate. Each pool has distinct cost categories and allocation bases, and confusing them is the fastest way to trigger a DCAA finding.
What Are Indirect Rates and Why Do They Matter?
In government contracting, every cost falls into one of two categories: direct costs (labor, materials, and expenses you tie to a specific contract) and indirect costs (expenses that benefit multiple contracts or the business as a whole). Indirect rates are the mechanism for allocating those indirect costs to individual contracts in a way that is fair, consistent, and compliant with FAR Part 31 and applicable Cost Accounting Standards (CAS).
Getting your indirect rates right matters for three reasons:
- Contract pricing: Your indirect rates directly determine your fully-loaded cost on every proposal. Rates that are too high make you uncompetitive. Rates that are too low mean you are performing work at a loss.
- DCAA audit compliance: DCAA reviews indirect rate structures as part of incurred cost audits. Improperly allocated costs lead to questioned costs and potential findings.
- Profitability: Your wrap rate, the total multiplier applied to each direct labor dollar, determines your true cost of doing business. If you do not know your wrap rate, you do not know your margins.
The Three Core Indirect Rates
Most government contractors use a three-pool indirect rate structure. Here is what each rate covers and how to calculate it.
1. Fringe Rate
Your fringe rate captures the cost of employee benefits applied on top of direct and indirect labor. The fringe pool typically includes:
- Health, dental, and vision insurance (employer portion)
- Employer payroll taxes (FICA, FUTA, SUTA)
- 401(k) or retirement plan contributions
- Paid time off (PTO), holidays, and sick leave
- Workers’ compensation insurance
- Life and disability insurance
Calculation:
Fringe Rate = Total Fringe Costs / Total Labor Base (Direct + Indirect Labor)
Example: Your firm has $150,000 in total fringe costs and $500,000 in total labor (direct plus indirect). Your fringe rate is $150,000 / $500,000 = 30%.
For every dollar of labor, you spend an additional $0.30 on benefits. The allocation base for fringe is typically all labor, both direct and indirect, because benefits apply to all employees regardless of what they work on.
2. Overhead Rate
The overhead rate captures costs related to supporting contract work that cannot be tied to a single contract. Common overhead pool costs include:
- Facility costs (rent, utilities, maintenance), if your facility primarily supports contract performance
- Indirect labor for project support staff
- Equipment and supplies used across projects
- IT infrastructure supporting contract delivery
- Project management tools and software
Calculation:
Overhead Rate = Total Overhead Costs / Direct Labor Base
Example: Your overhead pool totals $200,000 and your direct labor is $400,000. Your overhead rate is $200,000 / $400,000 = 50%.
Note the base shift: while fringe typically uses total labor, overhead is usually allocated over direct labor only. The allocation base you choose must be consistent with your disclosed practices.
For fully CAS-covered contractors, CAS 9904.418-40(c) requires pooled costs to be allocated “in reasonable proportion to the beneficial or causal relationship of the pooled costs to cost objectives.” The same standard adds two requirements worth knowing even if CAS does not apply to you, because they describe what a defensible structure looks like. Pools must be homogeneous [9904.418-40(b)]. And the business unit must keep “a written statement of accounting policies and practices for classifying costs as direct or indirect which shall be consistently applied” [9904.418-40(a)].
Non-CAS contractors follow FAR 31.203(c), which requires indirect costs to be accumulated “by logical cost groupings with due consideration of the reasons for incurring such costs,” with a base that allocates each grouping “on the basis of the benefits accruing” to the cost objectives. The companion consistency rule sits one paragraph earlier: FAR 31.203(b) bars allocating a cost indirectly when costs incurred for the same purpose, in like circumstances, have been charged directly to any contract.
3. General & Administrative (G&A) Rate
Your G&A rate covers the cost of running the business itself, not contract execution. The G&A pool typically includes:
- Executive compensation
- Accounting, legal, and HR functions
- Business development and proposal costs
- Corporate insurance
- Office expenses for administrative staff
- Facility costs, if your facility primarily supports general business operations
Calculation:
G&A Rate = Total G&A Costs / Total Cost Input Base
The total cost input base typically includes all direct costs, all fringe costs applied, and all overhead. Some contractors use a value-added base or single-element base depending on their cost structure, but total cost input is the most common approach.
Example: Your G&A costs total $120,000. Your total cost input (direct labor + direct materials + applied fringe + applied overhead) is $800,000. Your G&A rate is $120,000 / $800,000 = 15%.
How do you calculate your wrap rate as a government contractor?
Your wrap rate is the full multiplier that converts a dollar of direct labor into your total cost. Using the examples above:
| Component | Per $1.00 of direct labor |
|---|---|
| Direct labor | $1.00 |
| Fringe, at 30% of labor | $0.30 |
| Overhead, at 50% of direct labor | $0.50 |
| Subtotal before G&A | $1.80 |
| G&A, at 15% of the subtotal | $0.27 |
| Total wrap rate | $2.07 |
Every $1.00 of direct labor actually costs your firm $2.07 before profit. If you are pricing a proposal without understanding your wrap rate, you are guessing at your costs. Guessing does not survive a DCAA audit.
Want to run your own numbers? Use our free indirect rate calculator to model your fringe, overhead, and G&A rates in minutes.
What are the most common mistakes contractors make in indirect rate calculation?
After years of managing government contractor books, these are the errors we see most often:
- Mixing up allocation bases. Using direct labor as the base for G&A when you should be using total cost input, or vice versa, distorts your rates and creates audit risk. Your allocation bases must be consistent, documented, and aligned with the way costs actually benefit your contracts.
- Including unallowable costs in indirect pools, or stripping them out of the base. FAR 31.205 identifies costs that are unallowable on government contracts: entertainment, alcoholic beverages, bad debts, lobbying, and others. These must be kept out of your indirect pools. The trap is what happens next. FAR 31.203(d) says the contractor “shall not fragment the base by removing individual elements,” and that when a cost input base is used for G&A the contractor “shall include in the base all items that would properly be part of the cost input base, whether allowable or unallowable,” each bearing its pro rata share. Unallowable costs leave the pool and stay in the base. Removing them from the base shrinks the denominator and inflates the rate you are about to defend.
- Inconsistent pool composition year over year. Moving IT costs from overhead to G&A between years is not a bookkeeping preference. For a CAS-covered contractor it is a change to a cost accounting practice, defined at 48 CFR 9903.302-2 as “any alteration in a cost accounting practice,” which brings disclosure and cost-impact obligations with it rather than a note in the file. For a non-CAS contractor, FAR 31.203(e) recognizes that the allocation method may need revising when the business changes significantly, so a genuine change is defensible when documented. What is not defensible either way is drift with no stated reason. (CAS 9904.402 is a different rule, and a commonly miscited one: it governs whether a cost incurred for the same purpose in like circumstances is treated as direct or indirect, not which indirect pool it sits in.)
- Using provisional rates as final rates. Your provisional (billing) rates are estimates. At fiscal year-end, you must calculate actual rates and true up. Contractors with cost-reimbursement contracts submit an adequate final indirect cost rate proposal, the Incurred Cost Submission, to the contracting officer or cognizant federal agency official and to the auditor within six months after their fiscal year ends [FAR 52.216-7(d)(2)(i)]. Reasonable extensions are available in writing for exceptional circumstances, so ask early rather than explaining late. Fixed-price-only contractors reconcile internally without an ICS filing. Firms that never reconcile provisional to actual rates accumulate risk.
- Ignoring materiality thresholds. Not every cost needs its own indirect pool. FAR 31.203(c) says it directly: when “substantially the same results can be achieved through less precise methods, the number and composition of cost groupings should be governed by practical considerations and should not unduly complicate the allocation.” A $5,000 pool with an elaborate allocation methodology adds audit exposure without meaningful precision. Keep your rate structure as plain as your business allows.
Key Takeaways
- Know your three rates. Fringe, overhead, and G&A each have distinct cost pools and allocation bases. Calculate all three to understand your true cost structure.
- Your wrap rate determines competitiveness. It is the single number that tells you what a dollar of labor actually costs your firm, and whether your proposals are priced to win and sustain profitability.
- Allocation bases matter as much as the numbers. Using the wrong base distorts rates, misprices contracts, and creates DCAA audit findings. Document your methodology and apply it consistently.
- Segregate unallowable costs from day one. Retroactively separating unallowable costs is expensive and error-prone. Build the separation into your chart of accounts and bookkeeping process upfront.
- Reconcile provisional rates to actuals annually. Provisional rates are estimates. Actual rates are what you will defend in an audit. Close the gap every fiscal year.
Frequently Asked Questions
What is a good indirect rate for government contractors?
There is no single “good” rate because appropriate rates depend on your business size, cost structure, and contract mix. Ranges quoted around the industry sit near fringe of 30 to 45 percent, overhead of 60 to 120 percent, and G&A of 10 to 25 percent, but treat those as folklore rather than a standard.
They vary enormously by industry, geography, contract mix and how a contractor has structured its pools, and no regulation sets a target. See our fringe, overhead, and G&A rates guide for how the pools differ. A rate outside a common range is not wrong, though it invites the question of why, and you should be able to answer it from your cost structure. The goal is rates that accurately reflect your cost structure, not rates that hit an arbitrary benchmark.
How often should I recalculate my indirect rates?
At minimum, calculate actual rates annually at fiscal year-end for your Incurred Cost Submission. However, best practice is to review provisional rates quarterly and adjust if actual costs are trending more than 10% above or below your billing rates. Significant mid-year changes should trigger an immediate review, and FAR 31.203(e) makes the same point in regulatory terms: the method of allocating indirect costs may require revision when there is a significant change in the nature of the business, the extent of subcontracting, fixed-asset improvement programs, volume, or other relevant circumstances. Contractors who monitor rates monthly catch problems before they compound into audit findings.
What is the difference between provisional and actual indirect rates?
Provisional rates are estimates you use for billing throughout the year. They are based on your forward pricing rate proposal or historical actuals. Actual rates are calculated after your fiscal year closes using real cost data. On cost-reimbursement contracts, you must reconcile the difference. If your provisional rates were higher than actual rates, you owe the government a credit. If lower, you are entitled to an upward adjustment, subject to contract ceiling limitations.
Can I change my indirect rate structure from year to year?
Yes, but the consequences differ depending on your CAS status. If you are CAS-covered, altering your pool structure is a change to a cost accounting practice under 48 CFR 9903.302-2, and it carries disclosure and cost-impact obligations rather than simply a memo to file. If you are not CAS-covered, FAR 31.203(e) accepts that the allocation method may require revision when the nature of the business, the extent of subcontracting, or other relevant circumstances change significantly.
Either way, document the change and show that the new structure better reflects how costs actually benefit your contracts. Frequent, undocumented changes raise audit flags. CAS 9904.402 is often cited for this and does not fit: it governs the direct-versus-indirect treatment of costs incurred for the same purpose, not the choice between two indirect pools.
What is a wrap rate and why does it matter?
Your wrap rate is the total cost multiplier applied to each dollar of direct labor. It includes fringe, overhead, and G&A applied sequentially. For example, if your fringe is 30%, overhead is 50%, and G&A is 15%, your wrap rate is approximately 2.07x. This means every $1.00 of direct labor actually costs $2.07 before profit. Your wrap rate determines both your competitiveness in proposals and your actual margins on contracts. If you do not know your wrap rate, you do not know whether you are making or losing money on each contract.
Get Your Rates Right, Before the Auditor Does
Indirect rate calculation is not a one-time exercise. Your rates shift as your business grows, as headcount changes, and as your contract mix evolves. Check your rates against actuals every quarter. Do that and you will not spend the ninety days after an audit notification rebuilding a year of history from memory.
Start by running your numbers through our indirect rate calculator to see where you stand today. If you want a professional review of your rate structure and cost pool composition, take our Compliance Readiness Check. It takes two minutes and gives us enough context to tell you where you are strong and where the risk is.
Amerifusion is a CPA-managed bookkeeping firm that works exclusively with government contractors. We configure your QuickBooks for DCAA compliance, maintain your indirect rate pools, and keep your books audit-ready year-round. Learn more about how we work.
