New government contractors repeat the same government contractor accounting mistakes year after year, and each one costs real money. Seven of them produce most DCAA findings, questioned costs and failed pre-award surveys.
They share a shape. Each is cheap to prevent at contract award and expensive to unwind afterwards, because the fix is never only the accounting entry. It is every billing computed from the wrong number, every rate recalculated, and every prior year reopened.
Every mistake on this list is preventable.
Mistake 1: Commingling Direct and Indirect Costs
FAR 31.202(a) is narrower and sharper than it is usually described. It does not say “do not charge a cost twice.” It bars a final cost objective from carrying a cost as a direct charge where costs incurred for the same purpose in like circumstances sit in an indirect pool. The test is consistency across like costs, not double-counting a single invoice. Commingling in one chart of accounts is the most common government contractor accounting mistake and the one with the widest blast radius, because it makes that consistency impossible to demonstrate.
A commercial chart of accounts lumps all labor into one account, all supplies into another, and all rent and utilities into a third. Government contracting does not work this way. Direct labor on Contract A, direct labor on Contract B, overhead labor, G&A labor, and unallowable labor must each sit in separate accounts. The same principle applies to materials, travel, subcontracts, and every other cost element.
When direct and indirect costs share the same accounts, every billing to the government is suspect. The contractor has no way to prove which costs belong to which contract, and the auditor has no way to verify that indirect rates are calculated correctly. DCAA’s response is predictable: question the entire cost pool.
A contractor billing $3 million annually in indirect costs with commingled accounts faces a potential $3 million questioned cost finding. That is not a line item adjustment. That is every indirect dollar billed across every contract, at risk.
The fix: Build a GovCon-specific chart of accounts before incurring a single cost on your first government contract. Separate direct costs by contract and cost element. Create distinct indirect pools for fringe, overhead, and G&A. Our QuickBooks DCAA setup guide walks through the exact account structure.
Mistake 2: Using Consumer-Grade Timekeeping
DCAA Manual 7641.90 (November 2023), Enclosure 3, Section 3.c sets the timekeeping controls contractors are expected to run. Employees record their own time daily. Supervisors approve and cosign. Corrections preserve the original charge, the corrected charge, and the employee’s written concurrence.
Auditors test those controls under DCAA CAM 6-405.2, “Procedures for Evaluating Timekeeping Controls”. For Time-and-Materials contracts, FAR 52.232-7(a)(5) is often cited as requiring individual daily job timekeeping records. The clause is narrower than that. It gives three ways to substantiate a voucher, joined by “or”: individual daily job timekeeping records, records verifying employees meet the labor-category qualifications, or other substantiation the contracting officer approves. Daily records remain the sound choice, and they are what the DCAA controls above expect. The point is to know which route your own contract relies on rather than to assume. Weekly timesheets, honor-system spreadsheets, and retroactive time entry from memory all fail DCAA’s floor test.
The distinction matters because labor is the single largest cost element on most government service contracts. When DCAA questions your timekeeping system, it questions your labor costs, and labor is also the base most indirect rates are applied to. So a timekeeping finding does not stay in the labor line.
Take a contractor billing $4 million in annual direct labor on a weekly timesheet system. The worst case is not a sampling adjustment. It is every direct labor charge becoming a questioned cost, plus the indirect costs allocated on top of that same labor base.
| Timekeeping Practice | DCAA Compliant? | Risk Level |
|---|---|---|
| Daily entry by employee, supervisor approval, audit trail | Yes | Low |
| Daily entry by employee, no supervisor approval | Partial | Medium |
| Weekly timesheets completed on Friday from memory | No | High |
| Supervisor or admin completes timesheets for employees | No | Critical |
| No formal timekeeping system in place | No | Critical |
The fix: Implement a timekeeping system that enforces daily entry at the employee level, requires supervisor review and approval, and preserves an unalterable audit trail of all corrections. Test it with actual employee data for at least two pay periods before your first government contract invoice.
Mistake 3: Ignoring Unallowable Costs in Indirect Pools
FAR Part 31 designates specific cost categories as unallowable on government contracts. FAR 31.205-14 (entertainment), FAR 31.205-51 (alcoholic beverages), and FAR 31.205-22 (lobbying) are the most commonly cited, but the full list in FAR 31.205 runs to 46 cost categories with specific allowability rules. The numbering reaches 31.205-52, which is where the commonly repeated “over 50” comes from, but six of those numbers are [Reserved].
New contractors treat unallowable costs as an audit-prep exercise: something to clean up before filing the incurred cost submission. This approach creates two problems.
First, every interim billing submitted before the cleanup carries inflated indirect rates, because the unallowable costs are still sitting in the overhead and G&A pools.
Second, FAR 52.242-3 imposes a penalty equal to the disallowed amount plus simple interest when expressly unallowable costs appear in final indirect cost rate proposals or final statements of costs. For costs previously determined unallowable, the penalty increases to two times the disallowed amount. The clause is prescribed by FAR 42.709-7 for all solicitations and contracts over $1 million, excepting fixed-price contracts without cost incentives and any firm-fixed-price contract for commercial products or services.
Check which text your contract runs under. FAR 42.709 does not exist in the FAR Overhaul deviation text at all; searching it returns zero hits. The section became 42.508, so the prescription is 42.508-7 there. The wording of the prescription is identical in both, and 52.242-3 keeps its clause number, so nothing changes for the reader except which section to quote.
Consider a contractor with $2 million in annual overhead costs. If $40,000 in entertainment and alcohol expenses sit in the overhead pool, the overhead rate applied to every contract is inflated. On a $5 million direct cost base, that $40,000 error produces roughly $8,000 in overbilling per $1 million contract. Across five contracts over three years, the cumulative overbilling reaches six figures before anyone catches it.
The fix: Create mirror accounts in your chart of accounts for every major unallowable cost category. Flag unallowable costs at the point of entry, not during year-end cleanup. Train every person who touches the books to code entertainment, alcohol, lobbying, fines, and contributions to the correct unallowable account the day the transaction occurs. Read our full guide to unallowable costs for the complete category list.
Mistake 4: Operating Without Written Accounting Policies
DCAA auditors open every engagement by requesting your written accounting policies. Compensation policy. Travel policy. Timekeeping policy. Purchasing and procurement policy. Unallowable cost policy. Contractors who respond with “we handle everything consistently, but we do not have it written down” receive a finding before the auditor examines a single transaction.
Written policies serve two functions in government contracting. They demonstrate to auditors that your cost accounting practices are intentional and documented, not ad hoc. They also protect you during disputes. When a DCAA auditor questions a cost allocation methodology, a written policy approved by management and dated before the transaction occurred is your primary defense. A verbal description of past practice carries no weight.
The SF 1408 pre-award survey (the gate to cost-reimbursable contract awards) explicitly evaluates whether documented accounting policies exist. Contractors without written policies fail this evaluation and lose the contract opportunity. Our SF 1408 guide details all 15 criteria, and written policies touch at least six of them.
The fix: Draft five core policies before your first government contract award. Each policy needs a purpose statement, scope, procedures, approval authority, effective date, and version number. Budget 20 to 40 hours for the initial policy set. Assign annual reviews to keep them current.
| Required Policy | What It Covers | DCAA Evaluation Point |
|---|---|---|
| Compensation | Salary structure, bonuses, raises, executive comp limits | FAR 31.205-6 reasonableness test |
| Travel | Per diem rates, approval requirements, documentation | FAR 31.205-46 travel cost limits |
| Timekeeping | Daily entry, supervisor approval, correction procedures | DCAA Manual 7641.90 (Nov 2023) Encl. 3, Section 3.c; tested under DCAA CAM 6-405.2 |
| Purchasing | Approval thresholds, competitive bidding, documentation | FAR 31.201-3 reasonableness |
| Unallowable Costs | Identification, segregation, and exclusion procedures | FAR 31.205 full compliance |
Mistake 5: Treating GovCon Bookkeeping Like Commercial Bookkeeping
Commercial accounting exists to report financial performance to owners, investors, and tax authorities. Government contract accounting exists to prove that every dollar billed to the federal government is allowable, allocable, and reasonable under FAR Part 31. These two objectives produce fundamentally different accounting system requirements.
Contractors making this DCAA accounting mistake use their existing commercial chart of accounts, their existing monthly close process, and their existing reporting package for government work. The commercial system tracks revenue and expense by department. The government system must track costs by contract, by cost element, by direct and indirect classification, and by allowability status. A commercial P&L tells you whether the business is profitable. A government contract cost report tells the auditor whether every charge is justified.
The gap between these systems is not a minor adjustment. A commercial accounting setup requires a ground-up restructuring of the chart of accounts, new indirect cost pools with defined allocation bases, job cost tracking by contract number, and a timekeeping system that meets DCAA standards. Contractors who bolt government requirements onto a commercial framework produce books that satisfy neither purpose.
The fix: Build a separate GovCon accounting structure from the start. A properly configured system runs both commercial and government reporting from the same general ledger, but the chart of accounts, cost pools, and job cost tracking must be designed for government requirements first. Use our indirect rate calculator to model your cost pool structure before configuring your accounting software.
Mistake 6: Waiting Until Audit to Prepare
Fixing this late costs more than building it early, and the reason is structural rather than a matter of billing rates. Three things happen at once, and only the first is accounting work.
Retroactive data cleanup. Every transaction booked under a commercial chart of accounts has to be reclassified into a GovCon structure, for every year still open.
Amended billings. If your indirect rates were wrong because unallowable costs sat in the pools, every interim billing computed from those rates needs recalculating and resubmitting. This is the part contractors underestimate: the accounting fix is one job, and the billing history is a second, larger one.
Audit defense. Answering DCAA findings after the fact is CPA-level work under time pressure, where doing it correctly in real time is routine bookkeeping.
A contractor who waits three years to address new government contractor bookkeeping requirements is buying all three at once.
| Remediation Activity | What Drives the Cost | Avoidable by Building Early? |
|---|---|---|
| Chart of accounts restructuring | Every existing account has to be mapped, not merely added to | Entirely |
| Transaction reclassification | Scales with the number of open years and transaction volume | Entirely |
| Indirect rate recalculation | One recalculation per fiscal year still open | Entirely |
| Amended billings | One per interim billing computed from a wrong rate | Entirely |
| Written policy development | Same work either way, but under deadline pressure | Cost is similar, the pressure is not |
| DCAA audit response support | Scales with how much of the above is unfinished when the auditor arrives | Largely |
We have deliberately not put a price range on that table. Remediation cost turns on how many fiscal years are still open, how many interim billings were computed from the wrong rates, and how clean the underlying records are, and those vary more between two similar-sized contractors than any published average would suggest. Ask any prospective provider to scope your own open years, and treat a quote drawn from a table as a red flag.
The fix: Build your GovCon accounting infrastructure in the first 90 days after contract award, not in the 90 days before your first audit. The investment pays for itself in avoided remediation costs, clean audit outcomes, and accurate billings from day one.
Mistake 7: Choosing the Wrong Accounting Software
Government contract accounting requires software with specific capabilities: job costing by contract, indirect cost pool allocation, labor distribution tied to a compliant timekeeping system, and unallowable cost tracking. Consumer accounting software and many mid-market platforms lack one or more of these features, forcing contractors into spreadsheet workarounds that break under audit scrutiny.
The most common govcon accounting error in this category is selecting software based on price or familiarity rather than government contract requirements. A $30-per-month subscription to a consumer platform costs far more than $30 per month when DCAA questions every indirect rate because the software has no cost pool allocation capability.
QuickBooks Desktop and QuickBooks Online both support government contract accounting when configured correctly. The configuration matters more than the platform: job costing, class-based indirect pools and a GovCon chart of accounts will support a DCAA-adequate system, and DCAA evaluates system capability rather than the software brand.
One availability point that catches new buyers. Intuit stopped selling QuickBooks Desktop Pro Plus, Premier Plus and Mac Plus to new United States subscribers on 30 September 2024. Existing subscribers keep renewing and keep support, but a contractor setting up today cannot buy them. QuickBooks Desktop Enterprise is unaffected and remains on sale, and QuickBooks Online is available at every tier. Our QuickBooks DCAA compliance guide covers which edition to choose.
Enterprise platforms such as Deltek Costpoint and Unanet offer purpose-built GovCon features. They are aimed at larger contractors than QuickBooks is, though the threshold is a sales conversation rather than a published rule. Ask the vendors where their smallest customers sit.
| Capability | Required for GovCon? | Why It Matters |
|---|---|---|
| Job costing by contract | Yes | Every direct cost must trace to a specific contract number |
| Indirect cost pool allocation | Yes | Fringe, overhead, and G&A rates must calculate from defined pools |
| Unallowable cost flagging | Yes | FAR 31.205 costs must be segregated from allowable costs |
| Labor distribution by project | Yes | Direct and indirect labor must charge to correct cost objectives |
| Audit trail for all entries | Yes | Accounting system adequacy requires traceable, unalterable transaction history; DCAA verifies at every audit |
| Multi-level reporting (by contract, pool, period) | Yes | Incurred cost submission schedules require this data structure |
The fix: Select accounting software based on GovCon requirements, not commercial features. For contractors under $10 million in revenue, a properly configured QuickBooks setup handles DCAA requirements at a fraction of enterprise platform cost. Our QuickBooks DCAA compliance guide covers the full configuration process.
Frequently Asked Questions
What is the most common government contractor accounting mistake?
Commingling direct and indirect costs in a single chart of accounts is the most frequent error. FAR 31.202 prohibits treating the same cost as both direct and indirect. Contractors using a standard commercial chart of accounts with no separation between direct contract costs and indirect cost pools face questioned costs across every contract during DCAA audit.
How much does it cost to fix government contractor accounting errors retroactively?
More than building it correctly at award, though we will not quote you a multiplier or a range, because the honest answer depends on facts specific to your books. The cost is driven by how many fiscal years are still open, how many interim billings were computed from indirect rates that turn out to be wrong, and how much of the underlying transaction detail survived. Two contractors of the same size routinely differ by an order of magnitude on all three. Ask any provider to scope your open years rather than quoting an industry average.
Does DCAA accept QuickBooks for government contract accounting?
DCAA evaluates your accounting system’s capabilities, not the software brand. QuickBooks Desktop and QuickBooks Online can both support DCAA-adequate systems when configured with a GovCon chart of accounts, job costing by contract, indirect cost pool structure, and unallowable cost tracking. The configuration determines compliance, not the platform name.
What happens if DCAA finds unallowable costs in my indirect rate pools?
DCAA adjusts your indirect rates downward and questions the overbilled amounts across all contracts. FAR 52.242-3 imposes a penalty equal to the disallowed amount plus interest when expressly unallowable costs appear in final indirect cost rate proposals or final statements of costs. For costs previously determined unallowable, the penalty increases to two times the disallowed amount. The contracting officer recovers the overbilling through payment offsets on current invoices or demands for repayment on closed contracts.
When should a new government contractor set up DCAA-compliant accounting?
Build your GovCon accounting infrastructure in the first 90 days after contract award. Waiting until DCAA schedules an audit, or requests an incurred cost submission, means doing the same work retroactively across every fiscal year still open, and recalculating every interim billing computed from a rate that turns out to be wrong. A compliant chart of accounts, timekeeping system, and written policies should be operational before you submit your first invoice.
Key Takeaways
- Build your chart of accounts for government contracting from day one. Separating direct costs by contract, indirect costs by pool, and unallowable costs by category prevents the single most damaging audit finding.
- Daily timekeeping is non-negotiable. Labor is the largest cost element on most service contracts and the base most indirect rates apply to, so a timekeeping finding reaches far past the labor line. Weekly timesheets and informal tracking fail DCAA’s floor test.
- Flag unallowable costs when they occur, not during audit prep. FAR 52.242-3 penalties apply on contracts where the clause is included per FAR 42.709-7. Monthly unallowable cost scrubbing eliminates this exposure.
- Written accounting policies are a prerequisite, not a nice-to-have. DCAA requests them at the start of every engagement. The SF 1408 pre-award survey evaluates them. Operating without written policies blocks both audit outcomes and new contract awards.
- Build early, because the expensive part is not the accounting. Remediation means reopening every fiscal year still open and recalculating every interim billing computed from a wrong rate. That work does not exist if the structure is right at award.
- Take the Compliance Readiness Check to identify which of these seven mistakes apply to your current accounting setup.
Your Accounting System Is Your First Line of Defense
Every mistake on this list shares a common root cause: building accounting systems for commercial purposes and expecting them to survive government scrutiny. Federal contract accounting operates under a different set of rules, and contractors who recognize this early protect their billings, their cash flow, and their eligibility for future awards.
Amerifusion Bookkeeping is a CPA-managed firm built for government contractors who need their accounting done right from the start. We configure compliant systems, write the policies DCAA requires, and maintain the books so every billing is defensible. Start with the Compliance Readiness Check to see where you stand, or review our GovCon accounting services to learn how the CPA-managed model works.
