Provisional Billing Rates: How New Contractors Set Indirect Rates

Win your first cost-reimbursement or T&M contract, and one of the first unfamiliar demands you’ll hit is a request for provisional billing rates — before you’ve billed a dollar, before you have a full year of actual indirect costs to point to. It feels like a chicken-and-egg problem, and in a sense it is, but it’s a solvable one once you understand what the government is actually asking for.

What a Provisional Billing Rate Actually Is

A provisional billing rate is your best estimate of what your indirect cost rates (overhead, G&A, fringe) will land at by year end, used to bill the government for indirect costs on cost-reimbursable and T&M contracts throughout the year. The government doesn’t let you bill at actual rates in real time — actuals aren’t known until the year closes — so provisional rates exist as a working estimate that gets trued up later. They also matter for your own cash flow: without an approved provisional rate, you can’t bill your full indirect costs as you incur them.

Setting Your First Rate With No History

An established contractor forecasts next year’s rates from last year’s actuals. A brand-new contractor doesn’t have that, which means your first provisional rate proposal has to lean on your budgeted indirect cost pools and bases — your projected overhead spending divided by your projected direct labor or another appropriate base — built from your business plan rather than historical actuals. Be conservative rather than optimistic here: an underestimated rate means you underbill all year and take a cash flow hit, while an overestimated rate that has to come down sharply at year-end can draw more scrutiny than a rate that needed a small upward adjustment.

How to Actually Submit It

There’s no single universal form for a first-time provisional rate submission. In practice, you send a letter to your contracting officer and the cognizant DCAA office proposing your rates, with the underlying indirect cost pools, the allocation base for each pool, and a summary explaining how you arrived at the estimate. For a 12/31 fiscal year-end contractor, get this in well before year-end close, since that window tends to be the government’s busiest for rate submissions and a late proposal can delay your first billings. Our DCAA-compliant QuickBooks setup guide covers the accounting foundation this rate proposal has to sit on top of.

Rates Aren’t Set in Stone All Year

Under FAR 42.704, provisional rates can be revised prospectively or retroactively by mutual agreement between you and the contracting officer or DCAA auditor, and either party can request the change. If you’re tracking actual costs against your provisional rate monthly (you should be) and you spot a significant over- or under-run building up, raise it proactively rather than waiting for year-end to reveal a large variance. A contractor who self-identifies a drifting rate looks like a contractor with a working accounting system; one who gets flagged by an auditor for a large undisclosed variance invites a harder look at that system.

The True-Up You Can’t Skip

Provisional rates aren’t the end of the story — they get trued up to your final, actual indirect rates when you prepare your incurred cost submission after year-end. If you billed too high all year on your provisional rate, you owe the government money back. If you billed too low, you’re owed. Either way, a significant swing between your provisional estimate and your actual year-end rate is exactly the kind of signal that can raise questions about whether your accounting and billing system is adequate — which is one more reason the conservative-estimate approach above matters more for a first-time contractor than it might seem.

A Worked Example: Building the Math Behind Your Rate

The pools-and-bases language in a provisional rate proposal reads abstractly until you run an actual contractor’s numbers through it. Here’s a simplified build-up for a new government contractor projecting a full year of indirect costs against a $400,000 direct labor base.

Start with the fringe pool: projected payroll taxes, health insurance, 401(k) match, and paid leave total $140,000 for the year. Dividing that pool by the $400,000 direct labor base gives a fringe rate of 35% ($140,000 ÷ $400,000). Next comes overhead — indirect costs tied to supporting direct work, such as supervision, indirect labor, and project-related facilities costs — projected at $120,000. Using the same direct labor base, that’s a 30% overhead rate ($120,000 ÷ $400,000).

G&A is different: it’s spread over a broader base, typically total cost input, which is direct labor plus fringe plus overhead (and materials or subcontract costs if you have them). Here that base is $400,000 + $140,000 + $120,000 = $660,000. A projected G&A pool of $150,000 divided by that base gives a G&A rate of roughly 22.7%.

Now apply those three rates to an actual month’s invoice. Say you bill $10,000 of direct labor for the month. Fringe adds $3,500 (35% of $10,000). Overhead adds another $3,000 (30% of $10,000). That subtotal, $16,500, becomes the base for G&A: 22.7% of $16,500 is about $3,746. Total billed to the government for that $10,000 of labor is $20,246 — a fully burdened multiplier of roughly 2.02 on raw direct labor dollars.

That multiplier is exactly what a contracting officer and a DCAA auditor expect to see trace cleanly back to your proposed pools and bases. If your provisional rates don’t reconcile this way on paper before you submit them, fix the math before the letter goes out, not after your first invoice gets questioned.

Key Takeaways

• A provisional billing rate is your working estimate of year-end indirect rates, used to bill the government throughout the year on cost-type and T&M contracts.
• A new contractor has no actuals to forecast from, so the first proposal is built from budgeted indirect pools and bases, and should lean conservative.
• Submission is a letter to your contracting officer and cognizant DCAA office, not a single standard form — get it in well before your fiscal year-end.
• Rates can be revised mid-year under FAR 42.704 if actual costs are drifting significantly from the provisional estimate.
• Provisional rates get trued up to actuals at your incurred cost submission; a large variance at that point can raise questions about your accounting system.

FAQ

Do I need an approved provisional rate before I can bill the government? Yes — without one, you can’t bill your indirect costs on a cost-reimbursable or T&M contract as you incur them, which is a real cash flow problem for a new contractor.

What happens if my actual rate ends up very different from my provisional rate? You true up the difference at your incurred cost submission — you either owe money back or are owed money. A large, undisclosed swing can also prompt closer DCAA scrutiny of your accounting system.

Can I change my provisional rate mid-year if I see it drifting? Yes, under FAR 42.704, by mutual agreement with your contracting officer or DCAA auditor. Flagging a drifting rate yourself is viewed far more favorably than letting it surface as a surprise at year-end.