Indirect Cost Rate Structure — Fringe, Overhead, G&A and the Wrap Rate
Also known as: Indirect rates, burden rates, wrap rate, fringe/overhead/G&A structure
What you do here: Design pools and bases that reflect how your business actually works — then price and bill from them
At a Glance
- Who it applies to
- Any contractor pricing or billing from cost — and any firm that wants to know whether its bid rates are actually competitive
- What it obligates
- Logical pools, benefit-based allocation bases, unallowable costs excluded, and consistent application
- Governing authority
- FAR 31.203 (indirect costs), FAR 31.201-4 (allocability); CAS 410 / 418 if CAS-covered
- Typical structure
- Fringe → Overhead → G&A, applied in sequence; the compounded result is the wrap rate
- The stakes
- Rate structure drives your price on every bid and your recovery on every cost-type voucher
What It Is
An indirect cost rate is arithmetic with consequences: a pool of shared costs divided by an allocation base. The design of the pools and the bases is where judgment lives, and FAR 31.203 sets the rules — indirect costs must be accumulated into logical cost groupings determined by their similarity to the activity or benefit involved, and each pool is allocated over a base that permits distribution on the basis of the benefits accruing to the several cost objectives. Most government contractors converge on three tiers. Fringe is the pool of employee benefits — payroll taxes, health insurance, paid time off, retirement contributions — allocated over total labor dollars, so it applies to everyone who draws a paycheck. Overhead is the pool of costs that support contract performance but can't be traced to one job: facilities, program-support staff, project management infrastructure, tools, and supplies; it is usually allocated over direct labor plus its fringe. General and administrative expense is the pool of costs of running the enterprise as a whole — executive management, accounting, legal, business development infrastructure, and corporate insurance; it is allocated over a total cost input base (all costs except G&A itself) or a value-added base (total cost input less direct materials and subcontracts). The bases compound, and that compounding is what produces the 'wrap rate': a $50/hour salary carrying a 30% fringe, a 35% overhead, and a 15% G&A does not cost $50 × 1.80 — it costs 50 × 1.30 = $65.00, then × 1.35 = $87.75, then × 1.15 = $100.91, before any fee. That number, plus profit, is your bid rate. Structure choices have real consequences: putting subcontracts and materials in the G&A base (total cost input) spreads G&A across pass-through dollars and lowers the rate applied to your own labor, while a value-added base concentrates G&A on labor and raises the labor rate but avoids burdening a large material pass-through. Neither is inherently right; what the FAR requires is that the base you choose actually reflects the benefit relationship, and that you apply it consistently.
When It Applies
- Every time you price a proposal — the wrap rate is the bridge between salary and bid rate.
- Every time you invoice a cost-reimbursement contract, where indirect costs are billed at provisional rates and trued up later.
- When you set up or restructure your accounting system, or add a second location, a commercial line, or an off-site workforce.
- When a preaward accounting system survey tests whether you have a logical and consistent method for allocating indirect costs.
- When you benchmark competitiveness — a wrap rate materially above your competitors' is a price-evaluation problem you can measure.
Key Features
| Feature | What It Means |
|---|---|
| Pool ÷ base = rate | Every indirect rate is a shared-cost pool divided by an allocation base. Both halves are design decisions you must be able to defend. |
| Three-tier structure is the norm | Fringe on total labor, overhead on direct labor plus fringe, G&A on total cost input or a value-added base. |
| Rates compound | Applied in sequence, the tiers multiply rather than add — which is why a wrap rate is always higher than the sum of the individual rates suggests. |
| Base choice moves the rate | A total cost input G&A base spreads G&A over materials and subcontracts; a value-added base concentrates it on labor. Both are permissible; the choice must reflect benefit. |
| Separate on-site and off-site pools | Firms with materially different cost structures for work performed at a government site versus their own facility commonly run separate overhead pools. |
| Unallowables come out first | FAR 31.201-6 requires unallowable costs to be removed from the pool before the rate is computed — otherwise every billing carries the error. |
The SDVOSB Angle
Rate structure is the most underused competitive lever an SDVOSB has. Many small firms inherit a single 'overhead' rate from their commercial accountant, quote it on every bid, and never discover that it prices them out of labor-heavy work while leaving money on the table on material-heavy work. Two structural moves pay for themselves. First, split fringe out of overhead: a separate fringe pool makes your cost structure legible to an evaluator, lets you price part-time and subcontracted labor accurately, and is the structure a preaward accounting-system survey expects to see. Second, think carefully about the G&A base if you subcontract heavily — which many SDVOSBs do while managing the limitations on subcontracting. Under a total cost input base, G&A applies to subcontract dollars too, so a large pass-through absorbs G&A and lowers the rate on your own labor; under a value-added base it does not. The right answer depends on whether your G&A genuinely works harder because of that subcontract volume. There is also a growth trap worth naming: an SDVOSB's rates are computed on a small base, so they swing hard. Win a big contract and your rates fall; lose one and they spike mid-year, which means you under-recover on the provisional rates you've been billing and owe a give-back at settlement. Firms that survive that cycle forecast rates against a realistic revenue plan and monitor actual-versus-provisional variance monthly rather than annually.
How to Comply
- Define your pools explicitly — what goes in fringe, what goes in overhead, what goes in G&A — and write down the rule.
- Choose each allocation base for its benefit relationship, and document why the base fairly distributes the pool.
- Strip unallowable costs from every pool before computing the rate, per FAR 31.201-6.
- Build the wrap rate in sequence (fringe on labor, overhead on labor plus fringe, G&A on total cost input or value added) and use the same math in pricing and billing.
- Model your rates against a realistic annual revenue and headcount forecast, not last year's actuals.
- Compare actual year-to-date rates to your provisional rates at least quarterly, and request a rate adjustment when the variance is material.
- Add separate pools (on-site/off-site, second location, commercial division) only when the cost structures genuinely differ — and adopt the change prospectively.
Watch Out For
- Running a single blended indirect rate that hides how differently labor-heavy and material-heavy work actually behaves.
- Adding rates together instead of compounding them, which understates the true wrap rate and the bid price built on it.
- Leaving unallowable costs in a pool, which inflates the rate on every contract simultaneously.
- Selecting a base to engineer a favorable rate rather than because it reflects benefit — auditors test base selection directly.
- Ignoring the volume sensitivity of a small base: one contract win or loss can move your rates by several points mid-year.
- Changing pools or bases mid-year without documenting the change, which creates a consistency problem across the fiscal year.
Run the Numbers
Frequently Asked
What is a wrap rate?
A wrap rate is the multiplier that converts a raw hourly labor cost into a fully burdened billing rate by applying the indirect rates in sequence — typically fringe, then overhead, then general and administrative expense — and, in a bid rate, adding fee. Because the tiers are applied in sequence, they compound rather than add: a $50 hourly salary with 30% fringe, 35% overhead, and 15% G&A becomes $65.00, then $87.75, then $100.91, a wrap of roughly 2.02 before profit. Wrap rates are the single most direct measure of price competitiveness on labor-based federal work.
What is the difference between overhead and G&A?
Overhead is the pool of indirect costs that support the performance of contracts — facilities used by project staff, program-support labor, project tools and supplies, and similar costs — and it is typically allocated over direct labor plus fringe. General and administrative expense is the pool of costs of managing the business as a whole rather than any particular contract: executive management, accounting and finance, corporate legal, corporate insurance, and general administration. G&A is allocated over a broader base, most often total cost input (all costs except G&A itself) or a value-added base (total cost input less direct materials and subcontracts).
Should I use a total cost input or a value-added G&A base?
It depends on whether your general and administrative effort genuinely scales with material and subcontract volume. A total cost input base includes direct materials and subcontracts, so G&A is spread across pass-through dollars — this lowers the G&A rate applied to your own labor and is common where the firm actively manages significant subcontracted work. A value-added base excludes materials and subcontracts, concentrating G&A on labor; it produces a higher labor rate but avoids burdening a large pass-through that consumes little administrative effort. FAR 31.203 requires the base to permit allocation on the basis of benefits accruing, so the choice must be defensible on benefit grounds and then applied consistently.
How many indirect rates should a small business have?
Most small government contractors are well served by three: fringe, overhead, and G&A. That structure is legible to auditors and evaluators, is what a preaward accounting system survey expects to see, and lets you price part-time labor, subcontracted labor, and material-heavy work accurately. Additional pools — separate on-site and off-site overhead, a material or subcontract handling pool, or a separate commercial division rate — are worth adding only when the underlying cost structures genuinely differ, because each additional pool adds accounting effort and another rate to defend at settlement.
Primary Sources
- FAR 31.203 — Indirect costs
- FAR 31.201-4 — Determining allocability
- FAR 31.201-6 — Accounting for unallowable costs
- FAR 42.704 — Billing rates
Plain-English reference, not legal, accounting, or tax advice. Cost allowability and accounting determinations are fact-specific, and the FAR, the Cost Accounting Standards, and the statutory dollar thresholds quoted here are amended and escalated for inflation over time. Always read the current FAR text and the cost and payment clauses in your specific contract, confirm the applicable thresholds and your accounting treatment with the contracting officer or cognizant administrative contracting officer, and consult a qualified government-contract accountant or counsel before relying on a cost position, signing a certificate, or submitting a claim.
Change log (1)
- LaunchedPublished the federal cost principles, indirect rates & government accounting requirements reference covering how the government decides what an SDVOSB may charge it — the five allowability tests of FAR 31.201-2, reasonableness and allocability (FAR 31.201-3 / 31.201-4), the expressly unallowable costs of FAR 31.205 with directly associated costs (FAR 31.201-6) and the FAR 42.709 / 52.242-3 penalty, the direct-vs-indirect consistency rule (FAR 31.202 / 31.203), the fringe/overhead/G&A pool-and-base structure behind a wrap rate, provisional billing rates (FAR 42.704), the incurred cost submission and final indirect rate settlement (FAR 52.216-7(d) / 42.705 / 42.708 quick closeout), the adequate accounting system tested on the SF 1408 (FAR 16.301-3 / 9.106), timekeeping and labor charging with floor checks and total time accounting, DCAA audits versus DCMA administrative contracting officer determinations, certified cost or pricing data and defective pricing (FAR 15.403-1 / 15.403-4 / 15.406-2 / 52.215-10), and the Cost Accounting Standards with the small-business exemption at 48 CFR 9903.201-1 — each with an at-a-glance quick-facts card, a when-it-applies list, a key-features table, an SDVOSB-specific angle, a how-to-comply checklist, watch-outs, FAQPage, Article, Dataset, and BreadcrumbList structured data, primary-source FAR / U.S.C. / CFR citations, and cross-links into the glossary, contract types, payment methods, thresholds, clauses, forms (SF 1408), regulation explainers, contracting roles, how-to guides, FAQ, and the price-to-win, size-standard, win-probability, and limitations-on-subcontracting calculators.