New government contractors repeat the same government contractor accounting mistakes year after year, and each one costs real money. Amerifusion Bookkeeping sees these errors across firms of every size, from $500,000 first-time awardees to $20 million contractors who grew too fast for their accounting infrastructure. The seven mistakes below account for the majority of DCAA findings, questioned costs, and failed pre-award surveys we encounter in practice.
A $6 million IT services contractor in Virginia operated for three years on a commercial QuickBooks setup. Two cost-reimbursable contracts. No indirect cost pools. No unallowable cost segregation. No written policies. When DCAA scheduled their first incurred cost audit, the firm spent $87,000 on retroactive compliance work that would have cost under $15,000 to build correctly from day one.
Every mistake on this list is preventable. The cost of fixing each one grows exponentially the longer it sits uncorrected.
Mistake 1: Commingling Direct and Indirect Costs
FAR Part 31 requires government contractors to segregate direct costs (charged to specific contracts) from indirect costs (allocated across contracts through cost pools) at the point of entry. Commingling these costs in a single chart of accounts is the most common government contractor accounting mistake and the one with the widest blast radius.
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 requires daily timekeeping with employee self-recording, supervisor approval, and an audit trail for all corrections. FAR 52.216-7(d)(2) establishes this standard. 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 for most government contractors, typically 60% to 70% of total costs. When DCAA questions your timekeeping system, they question your labor costs. When they question your labor costs, they question 60% to 70% of every dollar you billed.
A 50-person contractor billing $4 million in annual direct labor with a weekly timesheet system faces a worst-case scenario: every direct labor charge becomes a questioned cost. That is $4 million in potential audit liability, plus the indirect costs allocated on top of that 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 covers over 50 cost categories with specific allowability rules.
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 includes inflated indirect rates because unallowable costs are sitting in the overhead and G&A pools. Second, FAR 52.242-3 imposes penalty assessments (the disallowed amount plus interest) on contracts exceeding $650,000 when expressly unallowable costs appear in billings.
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 14 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 | FAR 52.216-7 labor recording |
| 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
Reactive compliance costs three to five times more than building correctly from day one. Amerifusion Bookkeeping tracks this ratio across client engagements, and the multiplier holds regardless of company size. A $15,000 initial setup becomes a $50,000 to $75,000 remediation project when a contractor waits two or three years to get compliant.
The cost multiplier breaks down into three components. First, retroactive data cleanup: reclassifying two years of transactions from a commercial chart of accounts into a GovCon structure takes 200 to 400 labor hours for a mid-sized contractor. Second, amended billings: if your indirect rates were wrong because unallowable costs were in the pools, every interim billing needs recalculation and resubmission. Third, audit defense: responding to DCAA findings after the fact requires CPA-level support at $150 to $350 per hour, compared to the $50 to $100 per hour bookkeeper who would have done it correctly in real time.
A $3 million contractor who waits three years to address new government contractor bookkeeping requirements faces a representative remediation bill.
| Remediation Activity | Estimated Cost | Time Required |
|---|---|---|
| Chart of accounts restructuring | $5,000 to $10,000 | 40 to 80 hours |
| 3 years of transaction reclassification | $15,000 to $30,000 | 200 to 400 hours |
| Indirect rate recalculation (3 fiscal years) | $8,000 to $15,000 | 60 to 120 hours |
| Written policy development | $5,000 to $8,000 | 30 to 50 hours |
| DCAA audit response support | $10,000 to $25,000 | Variable |
| Total retroactive compliance | $43,000 to $88,000 | 330 to 650 hours |
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. A properly structured QuickBooks setup with job costing, class-based indirect pools, and a GovCon chart of accounts passes DCAA audits. An out-of-the-box QuickBooks installation with default settings does not. Enterprise platforms like Deltek Costpoint and Unanet offer purpose-built GovCon features, but they cost $500 to $2,000 per user per month and are sized for contractors above $10 million in annual revenue.
| 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 at point of entry |
| Labor distribution by project | Yes | Direct and indirect labor must charge to correct cost objectives |
| Audit trail for all entries | Yes | DCAA requires traceable, unalterable transaction history |
| 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 Part 31 requires segregation at the point of entry. 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?
Retroactive compliance typically costs three to five times more than building correctly from day one. A mid-sized contractor ($3 million to $5 million annual revenue) facing a full remediation of chart of accounts restructuring, transaction reclassification, indirect rate recalculation, and policy development spends $43,000 to $88,000 and 330 to 650 hours.
Does DCAA accept QuickBooks for government contract accounting?
DCAA evaluates your accounting system’s capabilities, not the software brand. QuickBooks Desktop and QuickBooks Online both pass DCAA audits 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. On contracts exceeding $650,000, FAR 52.242-3 imposes a penalty equal to the disallowed amount plus interest. 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 forces retroactive compliance at three to five times the initial setup cost. 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 at the point of entry prevents the single most damaging audit finding.
- Daily timekeeping is non-negotiable. Labor represents 60% to 70% of most government contract costs. Weekly timesheets or informal tracking systems put the majority of your billings at risk during audit.
- Flag unallowable costs when they occur, not during audit prep. FAR 52.242-3 penalties apply to contracts over $650,000. 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.
- Retroactive compliance costs 3x to 5x more than proactive setup. A $15,000 initial investment in GovCon accounting infrastructure prevents a $50,000 to $88,000 remediation bill two to three years later.
- 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.
