In commercial business, overhead is a private number folded into your price, and customers judge only the price. In government contracting, overhead becomes a structured, visible rate: indirect costs are grouped into defined pools, applied through calculated rates, and, on cost-type work, billed provisionally and settled against actuals. The difference shapes how you price, what your accounting system must do, and how buyers judge whether your numbers are realistic.
Commercial overhead lives inside the price; government work turns it into defined, calculated rates a buyer can examine.
Indirect costs typically group into fringe, overhead, and general and administrative pools, each applied over a defined base.
On cost-type contracts, provisional rates bill during the year and settle against actual rates afterward through the incurred cost submission.
Some costs are unallowable on government work regardless of how ordinary they are commercially, and they must be identified and excluded.
Even on fixed-price work, some evaluators check whether a price is realistically low, so understanding your real rates sharpens competitiveness everywhere.
In commercial business, overhead is whatever it costs to keep the doors open, absorbed into pricing however the owner sees fit, and no customer asks to see the math. Government contracting splits from that habit the moment cost enters the evaluation. Federal buyers spending public funds are accountable for what things cost, which means the indirect side of your business, the rent, management time, benefits, and back-office spend that no single contract causes, gets organized into defined rates that can be calculated, applied, and verified. How far that visibility goes depends on contract type, and the vocabulary is worth knowing before the first cost-type solicitation arrives.
The structure is more approachable than its reputation. Indirect costs group into pools, and each pool is expressed as a rate over a base that drives it. Most contractors use three pools, though smaller businesses sometimes run with just two.
Fringe covers employee benefits, payroll taxes, and leave, usually applied over labor costs.
Overhead covers the costs of supporting direct work, such as facilities and supervision, applied over direct labor or another defined base.
General and administrative covers running the company itself, including executive management and accounting, applied over a broader base.
The combined effect, sometimes called a wrap rate, is what one hour of labor actually costs once every indirect layer is applied.
On cost-reimbursement and time-and-materials work, these rates operate in two stages: provisional rates, set in advance, bill the government during the year, and actual rates settle the difference afterward through the incurred cost submission. One more distinction has no commercial parallel: certain costs are unallowable on government work, including items like entertainment and interest (with narrow exceptions, such as certain state and local tax interest), however routine they are commercially, and the accounting system must identify and exclude them rather than bury them in a pool.
A buyer paying actual costs examines rates because the rates are the price, which is why cost-type solicitations weigh accounting system adequacy, from the pre-award survey through ongoing compliance, and rate support. The scrutiny has a commercial-world translation: it is due diligence, applied through structure instead of negotiation.
The discipline pays off beyond cost-type work too. On some competitive fixed-price awards, the solicitation lets evaluators check whether a price is unrealistically low, a review GAO refers to as price realism. That's a different test than cost realism, the routine review used on cost-reimbursement proposals, but the practical lesson is the same either way: contractors who know their true wrap rate price with confidence instead of guesswork, protecting margin on the work they win and walking away from work priced below their real cost. Our companion piece on incurred cost submissions covers the settlement mechanics, and our profit margins comparison covers where the economics land. USFCR has guided over 500,000 businesses since 2010, and the contractors who move into cost-type work smoothly are consistently the ones who built the rate structure before they needed it, then let it sharpen every bid they priced afterward.
What is an overhead rate in government contracting?
It is an indirect cost pool expressed as a percentage of the base that drives it, typically direct labor. Overhead sits alongside fringe and general and administrative rates in a contractor's indirect structure, and together they translate the costs no single contract causes into rates that can be applied to each contract's base and verified by the government.
What is the difference between provisional and final indirect rates?
Provisional rates are estimates set in advance so a contractor can bill indirect costs during the year on cost-type work. Final rates are calculated from actual costs after the fiscal year closes, submitted through the incurred cost submission, and used to settle the difference between what was billed and what performance actually cost.
What is a wrap rate?
It is the fully loaded cost of an hour of direct labor once fringe, overhead, general and administrative costs, and fee are applied. Contractors use it to price competitively and protect margin, and knowing your real wrap rate matters on fixed-price work as much as cost-type work, since some evaluators check whether a price is realistically low.
Do fixed-price contractors need an indirect rate structure?
A formal, government-approved structure is required for cost-type billing rather than fixed-price work. The understanding behind it helps everywhere, because a contractor who knows their true indirect costs prices fixed-price work realistically, and a business planning to grow into cost-type contracts saves itself a scramble by building the structure before the first award requires it.
Whether cost-type work is in your plans or not, calculate your real wrap rate this quarter, because every bid you price gets sharper the moment you know it. If cost-reimbursement or time-and-materials work is on your 2027 target list, go further: organize the pools, set supportable provisional rates, and engage a qualified government contracts accountant before the first solicitation rather than after the first award. For contractors weighing whether a cost-type opportunity fits, USFCR's Federal Contract Consulting helps businesses understand what a solicitation's contract type will demand, so the pricing structure and the pursuit stay matched.