How fringe, overhead, and G&A rates are built, what they fund, and how the structure affects competitiveness.
Last reviewed on May 12, 2026.
In federal contracting, indirect rates do more than aggregate overhead — they determine the difference between winning and losing a price competition. Two firms with identical direct labor rates can present very different fully burdened prices, and the difference is almost entirely structural. A firm that organizes its costs cleanly into well-designed indirect pools can offer competitive prices while preserving margin; a firm with bloated pools or poorly chosen bases ends up either non-competitive or unprofitable.
This page is about the structural and design choices behind rates. For the accounting system requirements that make those rates defensible, see DCAA compliance and accounting systems. For the proposal-side application of rates, see pricing strategies. For the math on a specific labor rate, use the wrap rate calculator.
Most government contractors use a three-pool indirect rate structure: fringe, overhead, and G&A. The pools differ in what they accumulate, how they are allocated, and what they fund.
What it contains: Payroll taxes, health and dental insurance, retirement contributions, paid time off, life and disability insurance, employee assistance programs.
Allocation base: Total labor dollars (direct plus indirect).
Why this base: Fringe varies with labor. A larger payroll generates proportionally more fringe cost, so allocating against labor dollars matches cause and effect.
What it contains: Costs that support production but cannot be tied to one contract — supervision, project management overhead, facilities used for direct work, production tools, indirect labor performing direct-work support.
Allocation base: Direct labor plus fringe (sometimes called labor-and-fringe or burdened labor).
Why this base: Overhead supports work being performed by direct labor. A larger direct-labor base on a contract uses more overhead support.
What it contains: Costs that support the company as a whole — executive salaries, finance and HR, legal, general office facilities, BD and proposal effort that cannot be tied to a specific contract.
Allocation base: Most commonly Total Cost Input (TCI) — all direct costs plus overhead-burdened labor. Less commonly Value-Added Cost Input.
Why this base: G&A supports the entire enterprise. The broader the base, the lower the G&A rate, but the calculation must reflect what actually drives G&A demand.
The "wrap rate" is the multiplier that converts a direct labor dollar into a fully burdened, billable dollar. Using illustrative rates: fringe 30%, overhead 50% on labor + fringe, G&A 10% on total cost input, fee 8% on total cost.
| Step | Calculation | Running total per $1 direct labor |
|---|---|---|
| Direct labor | $1.00 | $1.00 |
| + Fringe (30%) | $1.00 × 30% | $1.30 |
| + Overhead (50% on labor + fringe) | $1.30 × 50% | $1.95 |
| + G&A (10% on TCI) | $1.95 × 10% | $2.145 |
| + Fee (8% on total cost) | $2.145 × 8% | $2.317 |
The wrap rate here is 2.317. A $75/hour direct labor employee bills at $173.78. A 2-percentage-point reduction in overhead (50% to 48%) drops the wrap rate to about 2.282 — meaningful at scale, particularly on multi-year IDIQs where the rate carries forward.
The three-pool structure works well for firms with relatively homogeneous operations. Larger or more diverse contractors typically split pools to better match cost behavior:
Adding pools is a tradeoff. Each pool adds accounting complexity, audit scope, and rate maintenance work. The benefit is more accurate allocation; the cost is more administrative burden. Most small and mid-sized contractors gain little from adding pools beyond the standard three.
The allocation base for a given pool can change which contracts bear which costs. Consider G&A allocated on Total Cost Input (TCI) versus Value-Added Cost Input (VACI):
A firm whose work mix is labor-heavy may prefer TCI because the broader base lowers the G&A rate (though the resulting rate is applied to a smaller proportionate base). A firm that does significant pass-through subcontracting may prefer VACI because it keeps G&A from inflating subcontractor invoices, making the firm more competitive on prime-with-significant-subs proposals.
Allocation base changes are not trivial — they require consistent application, government approval in some cases, and a documented rationale. The choice is strategic and should be revisited as the firm's work mix evolves.
Government contractors with cost-reimbursement work operate under three different rates for the same pool over time:
The reconciliation matters because a firm whose actuals consistently come in different from its billing rates either over-bills (and ends up writing checks back to the government) or under-bills (and leaves money on the table). Setting realistic billing rates and updating them as conditions change is part of the discipline.