Indirect rates are percentages that spread shared business expenses across the specific contracts, projects, or grants that benefit from them. Every organization pays for rent, utilities, executive salaries, and payroll taxes that keep the business running but can’t be tied to a single deliverable. An indirect rate takes a pool of those shared costs, divides it by a logical measure of activity (usually direct labor or total direct costs), and produces a percentage that gets applied to each project so that project absorbs its fair share. The concept matters most for federal contractors and grant recipients, where auditors examine every dollar and a miscalculated rate can trigger repayment demands, financial penalties, and lost awards.
Direct Costs Versus Indirect Costs
The rate only makes sense once you can separate the two kinds of costs it works with. Direct costs are expenses you can trace to a single contract or project: the labor hours an engineer logs on one job, materials bought for that job, travel to that client’s site. Those get charged straight to the work that caused them.
Indirect costs benefit the business broadly and can’t be pinned to one project. Corporate rent, the CEO’s salary, the accounting team’s payroll, cybersecurity infrastructure. These expenses support every contract at once, so they have to be allocated rather than charged directly. Federal rules treat a cost as allocable to a government contract if it was incurred specifically for that contract, benefits both the contract and other work in reasonable proportion, or is necessary to the overall operation of the business.1eCFR. 48 CFR 31.201-4 – Determining Allocability
The split isn’t always obvious, and that’s where consistency becomes critical. If your company treats a type of expense as direct on one contract, you can’t flip it to indirect on another. Cost Accounting Standard 402 codifies this rule to prevent double-counting, where a cost gets charged to a contract directly and then again through an indirect rate.2eCFR. 48 CFR 9904.402 – Cost Accounting Standard, Consistency in Allocating Costs Incurred for the Same Purpose Written accounting policies should spell out which cost types belong on which side, and those policies have to be followed across every contract.
What Goes Into an Indirect Rate: The Three Cost Pools
Indirect costs don’t sit in one bucket. They’re sorted into cost pools, which are groupings of expenses that behave similarly and benefit the business in similar ways. Most government contractors run a tiered structure with three primary pools.
Fringe Benefits
The fringe pool captures the real cost of employing people beyond base wages: employer-paid health insurance, retirement contributions, payroll taxes, workers’ compensation, paid leave. These costs scale with headcount and compensation, so they get allocated against total labor dollars. Every hour of labor the company pays for generates fringe cost, whether that labor is direct, overhead, or administrative.
Overhead
The overhead pool covers expenses that support the direct execution of project work: facility costs, IT infrastructure, project supervision, equipment maintenance, operational supplies. A company with no active contracts would shed most of these. Overhead is usually allocated against direct labor dollars or direct labor hours, because the volume of direct project work drives the need for the support.
General and Administrative
The G&A pool collects expenses that sustain the corporate structure regardless of project volume: executive compensation, legal counsel, corporate accounting, human resources, business insurance. These benefit the entire enterprise, so G&A is typically allocated over the broadest base available. Some organizations maintain additional pools for things like material handling or independent research and development when those costs are big enough to warrant separate tracking.
The costs within each pool should share a similar causal relationship with the base used to allocate them. Federal regulations call this the principle of homogeneous cost groupings, with a practical caveat: when simpler methods produce substantially the same result, there’s no need to over-complicate the structure.3Acquisition.GOV. FAR 31.203 – Indirect Costs
How an Indirect Rate Is Calculated
The math is simple division. Take the total costs in a pool, divide by the allocation base, and the result is a percentage that tells you how much indirect cost gets loaded onto each dollar (or hour) of base activity.
Indirect Rate = Indirect Cost Pool ÷ Allocation Base
A 110% overhead rate means every $1.00 of direct labor carries $1.10 in overhead. A 13.5% G&A rate means every $1.00 of total cost input carries 13.5 cents of G&A. The rates cascade: fringe applies first to labor, overhead then applies to direct labor (now burdened with fringe), and G&A finally applies to the whole cost input including the fringe and overhead already allocated.
A simplified example. A company has $7 million in direct contract labor, a $7.7 million overhead pool, and a $2.7 million G&A pool allocated over a $20 million total cost input base.
- Overhead rate: $7,700,000 ÷ $7,000,000 = 110%
- G&A rate: $2,700,000 ÷ $20,000,000 = 13.5%
If Contract A has $4 million in direct labor, it absorbs $4.4 million in overhead (110% × $4 million). Contract A’s total cost input of $10.6 million then absorbs roughly $1.43 million in G&A (13.5% × $10.6 million). Larger contracts with more direct activity absorb proportionally more shared cost, and smaller contracts aren’t overloaded.4Defense Contract Audit Agency. Overview of Indirect Costs and Rates
Picking the Right Allocation Base
The allocation base is the denominator, and the choice matters. A good base has a causal or beneficial relationship with the costs it’s distributing. In practice, each pool uses a different one:
- Fringe pool: total labor dollars, including direct, overhead, G&A, and bid-and-proposal labor. Every employee generates fringe, so the base includes all labor.
- Overhead pool: direct labor dollars or direct labor hours. Overhead supports hands-on project work, so the base reflects only direct effort on contracts.
- G&A pool: total cost input, meaning all direct costs plus the indirect costs already allocated from the other pools. G&A benefits the whole enterprise, so the broadest base produces the fairest distribution.
Once a base is accepted, you can’t cherry-pick what stays in it. Federal rules prohibit “fragmenting the base” by removing individual cost elements. Everything that properly belongs in the base must stay there and absorb its proportional share of indirect costs, including costs the government won’t reimburse. The logic is counterintuitive but important: if unallowable costs were stripped out of the base, the remaining allowable costs would absorb a disproportionately large share, and the government would overpay.3Acquisition.GOV. FAR 31.203 – Indirect Costs
Grant recipients often work with a different base called Modified Total Direct Costs (MTDC). MTDC includes salaries, fringe, materials, supplies, services, travel, and up to the first $50,000 of each subaward. It excludes equipment, capital expenditures, patient care, rental costs, tuition remission, scholarships, participant support costs, and any subaward amount above $50,000.5eCFR. 2 CFR 200.1 – Definitions The exclusions prevent large pass-through expenditures from absorbing an unreasonable share of indirect costs.
What Can and Can’t Go Into the Pool
Not every business expense can be passed along to the government. Federal acquisition regulations identify specific categories as unallowable, meaning you can spend the money but you can’t include it in your indirect pools for government recovery. Common unallowable categories:
- Entertainment and social activities, including sporting events, parties, and company picnics
- Alcoholic beverages, in all circumstances
- Fines and penalties, unless incurred because of compliance with contract terms
- Lobbying and political activity aimed at influencing legislation or elections
- Bad debts and collection costs, including related legal expenses
- Interest on borrowings, bond discounts, and financing costs
- Contributions and donations, with narrow exceptions for community service
- Federal income taxes and certain excise taxes
- Goodwill and costs related to mergers, acquisitions, and reorganizations
Advertising and public relations are generally unallowable, with limited exceptions for recruitment ads, required contract notices, and promoting export sales at trade shows.6Acquisition.GOV. FAR 31.205-1 – Public Relations and Advertising Costs
Before any cost lands in a pool, it has to pass a five-part allowability test: it must be reasonable, allocable, compliant with Cost Accounting Standards (or GAAP where CAS doesn’t apply), consistent with contract terms, and not specifically disallowed by the FAR cost principles. Failing any one makes the cost unallowable.7Acquisition.GOV. FAR 31.201-2 – Determining Allowability
The handling of unallowable costs in rate calculations trips people up. Expressly unallowable costs must be identified and excluded from any billing or proposal submitted to the government.8Acquisition.GOV. FAR 31.201-6 – Accounting for Unallowable Costs But as noted above, those same costs stay in the allocation base. Unallowable costs come out of the numerator; they stay in the denominator.
Mistakes carry teeth. If a cost is expressly unallowable under FAR cost principles, the penalty equals the full amount of the disallowed cost allocated to covered contracts, plus interest on any portion already paid. If the contractor already knew the cost was unallowable (because it had been previously determined unallowable for that contractor), the penalty doubles.9GovInfo. 48 CFR 42.709-2 – General Those penalties apply whether or not the unallowable costs were actually paid, and they stack with any other administrative, civil, or criminal exposure.
The Types of Indirect Rates You’ll Encounter
Indirect rates aren’t a single number calculated once. Contractors work with several versions at different stages of the contract lifecycle, all built from the same formula.
Provisional (Billing) Rates
At the start of each fiscal year, contractors establish provisional rates based on forecasted costs and activity. These estimates let the contractor bill on cost-type contracts as work progresses rather than waiting until the books close. The contracting officer or auditor sets billing rates using recent audit results, prior-year experience, or similar reliable data, with the goal of keeping them as close as possible to anticipated final rates.10Acquisition.GOV. FAR 42.704 – Billing Rates Either party can request a revision during the year if the rates are running too high or too low.
Final Rates
After the fiscal year ends, the contractor calculates final rates using actual incurred costs. These reflect what really happened. The contractor must submit a final indirect cost rate proposal within six months after the end of its fiscal year.11Acquisition.GOV. FAR 52.216-7 – Allowable Cost and Payment The contracting officer then establishes final rates, and any difference between provisional billings and final amounts triggers a reconciliation. Provisional rates set too high mean the contractor owes money back; set too low means a shortfall to recover.12eCFR. 48 CFR 42.705 – Final Indirect Cost Rates
Forward Pricing Rate Agreements
A Forward Pricing Rate Agreement (FPRA) locks in projected rates for use in pricing future proposals over a defined period. Once negotiated, contracting officers use those rates to price all contracts, modifications, and other actions during the agreement period.13eCFR. 48 CFR 15.407-3 – Forward Pricing Rate Agreements FPRAs streamline the proposal process for contractors with heavy new-business volume, because each new proposal doesn’t require a fresh rate negotiation.
Negotiated Indirect Cost Rate Agreements
Grant recipients and some contractors receive a Negotiated Indirect Cost Rate Agreement (NICRA) from their cognizant federal agency. The NICRA sets the proportion of indirect costs each award should bear. Any organization that wants to recover indirect costs on cost-reimbursable grants, contracts, or cooperative agreements needs either a NICRA or the de minimis rate described below.14U.S. Department of Labor. Frequently Asked Questions (FAQs)
The De Minimis Rate for Grant Recipients
Organizations that have never negotiated a federal indirect cost rate have a simpler option. Under the Uniform Guidance, eligible recipients and subrecipients may elect a de minimis rate of up to 15% of modified total direct costs without negotiating or documenting their actual indirect expenses.15eCFR. 2 CFR 200.414 – Indirect Costs The rate was raised from 10% to 15% under the 2024 revisions to the Uniform Guidance, effective for new federal awards issued on or after October 1, 2024.
The de minimis rate is available indefinitely, but once elected it has to be used across all federal awards until the organization chooses to negotiate a rate. Federal agencies and pass-through entities can’t force a recipient to accept a rate lower than either its negotiated rate or the de minimis rate unless a specific federal statute requires it. The de minimis rate does not apply to cost-reimbursement contracts issued directly by the federal government under the FAR.15eCFR. 2 CFR 200.414 – Indirect Costs
For smaller nonprofits or organizations new to federal funding, the de minimis rate often makes sense. Negotiating takes real accounting infrastructure and documentation. Organizations whose actual indirect costs run well above 15% of MTDC leave money on the table by sticking with it, since the de minimis rate caps what they can recover.