Government Contractor Accounting and DCAA Compliance

Government contractor accounting requires a purpose-built financial system that segregates costs by contract, identifies allowable and unallowable expenses under FAR Part 31, and produces the indirect cost rates that support billing and closeout. The Defense Contract Audit Agency (DCAA) audits these systems to verify they meet the criteria on Standard Form 1408, and a deficient system can result in withheld payments or ineligibility for future cost-type awards. For any business holding or pursuing flexibly priced federal contracts, building a compliant accounting infrastructure is not optional.

Why Government Contractor Accounting Is Different

Commercial accounting systems are built to produce GAAP financial statements. Government contractor accounting is built to satisfy a different master: the Federal Acquisition Regulation (FAR), the Defense Federal Acquisition Regulation Supplement (DFARS), and DCAA audit standards. The core difference lies in cost accumulation. A government contract requires the contractor to demonstrate, year by year, that costs billed to the government are allowable, allocable to the contract, and reasonable in amount.

This requirement touches every layer of the accounting system, from how the chart of accounts is structured to how employees record their time each day. Contractors who underestimate that scope typically discover the problem during a pre-award accounting system audit or an incurred cost submission review, both of which can delay contract awards or trigger repayment demands.

The SF 1408 Framework

The DCAA uses SF 1408, the Pre-Award Survey of Prospective Contractor (Accounting System), as its primary checklist to determine whether a contractor’s accounting system is “adequate” before awarding a cost-type contract. An adequate system must do the following:

• Segregate direct costs from indirect costs in the chart of accounts.
• Accumulate costs by contract or job, not just by department.
• Identify and exclude unallowable costs from any amount billed or proposed to the government.
• Maintain a timekeeping system that attributes labor to specific contracts or indirect accounts daily.
• Support interim billing and allow for the determination of actual costs at any point during contract performance.
• Use logical, consistent bases to allocate indirect costs to final cost objectives.
• Reconcile costs to the general ledger.

If DCAA identifies significant deficiencies during a pre-award review, the contracting officer may withhold progress payments, cap indirect cost reimbursements, or determine the contractor is not eligible for award. Fixing system deficiencies after award is far more disruptive than building the system correctly from the start.

Understanding Indirect Cost Rates

Indirect cost rates are the mechanism government contractors use to recover overhead, fringe benefits, and general and administrative (G&A) expenses on top of direct labor and materials. Under FAR Subpart 42.7, contractors holding cost-reimbursable contracts must establish both provisional billing rates, used throughout the year, and final indirect cost rates, which settle the actual cost of performance after the fiscal year closes.

Common Indirect Cost Pools

Most government contractors organize indirect costs into three pools:

Fringe benefits pool. Payroll taxes, health insurance, retirement contributions, paid leave, and similar employee-related costs. The allocation base is typically total labor dollars or direct labor hours.

Overhead pool. Indirect costs that support direct work but cannot be traced to a specific contract, such as rent for project offices, supervision, and depreciation on field equipment. The allocation base is typically direct labor dollars.

G&A pool. Costs of running the business as a whole, including executive salaries, accounting, legal, and business development. The G&A base is typically total cost input or value-added cost input.

The structure of these pools, and the bases used to allocate them, must be disclosed consistently and applied uniformly across all contracts. Changing allocation methodology mid-year without proper notification can trigger a Cost Accounting Standards (CAS) noncompliance finding.

Incurred Cost Submissions

FAR 52.216-7 requires contractors with cost-reimbursable contracts to submit a final indirect cost rate proposal, commonly called an Incurred Cost Submission (ICS), within 6 months after the close of each fiscal year. DCAA provides the ICE (Incurred Cost Electronically) Model as the standard format. The submission reconciles the provisional rates billed during the year to the actual rates calculated from the audited cost data, and any overbilling must be returned to the government.

A late or inadequate ICS can suspend the contractor’s ability to receive further cost reimbursements on existing contracts. Many mid-market contractors underestimate the complexity of this annual deliverable, particularly when indirect pools span multiple business units or include allocated corporate costs.

FAR Part 31: Allowable and Unallowable Costs

FAR Part 31 defines the cost principles that govern what the government will and will not pay. Every cost incurred must be allowable (permitted under FAR Part 31), allocable (benefits the contract or pool it is charged to), and reasonable (a prudent business person would pay the same amount).

Common Unallowable Costs

FAR Part 31.201-6 requires that unallowable costs be identified and excluded from any amount billed, claimed, or proposed for reimbursement. Common unallowable categories include:

• Entertainment, recreation, and amusement
• Lobbying and political activity costs
• Alcoholic beverages
• Contributions and donations
• Fines, penalties, and interest on borrowed capital
• Public relations costs not specifically authorized
• Costs of IR&D and bid and proposal (B&P) work that exceed the regulatory caps

These costs must be separately identified in the general ledger, not simply excluded at billing time. DCAA auditors look for unallowable costs that were included in indirect pools during the year and subtract them when auditing the final indirect cost rates. Contractors who commingle allowable and unallowable costs in the same account create significant audit risk.

Cost Accounting Standards (CAS) Coverage

CAS is a separate layer of cost accounting rules that applies to larger government contractors. The FY2026 National Defense Authorization Act (NDAA), signed into law on December 18, 2025, directed the Cost Accounting Standards Board to raise the CAS thresholds. On September 1, 2026, the CAS Board published final rules in the Federal Register implementing those changes, effective October 1, 2026. The contract-level threshold for CAS applicability rose from $2.5 million to $35 million, and the threshold for full CAS coverage rose from $50 million to $100 million.

Under the finalized rules, negotiated contracts and subcontracts valued at $35 million or less are exempt from CAS. Contracts between $35 million and $100 million are generally subject to modified CAS coverage, under which contractors must follow four selected standards: CAS 401, 402, 405, and 406. Full CAS coverage requires compliance with all 19 Cost Accounting Standards. Both levels require a Disclosure Statement (CASB DS-1 or DS-2) disclosing the contractor’s cost accounting practices, and any change to those practices requires advance notification and may require contract price adjustments.

For many mid-market contractors, the raised thresholds mean their existing contracts may fall below the new CAS trigger, reducing the compliance burden. However, contractors should not assume they are exempt from CAS without reviewing their entire contract portfolio and any applicable flow-down clauses. The certified cost or pricing data threshold under the Truth in Negotiations Act remains $2.5 million and was not changed by these rules.

Timekeeping: The Foundation of Labor Cost Compliance

Labor is typically the largest direct cost category for service-oriented government contractors, and DCAA views timekeeping as the first line of defense against mischarging. An adequate timekeeping system must:

• Require all employees to record time daily, not reconstructed at week-end.
• Charge time to specific contract line items, task orders, or indirect accounts, not just to a department.
• Separate time spent on direct contract work from time spent on overhead, G&A, B&P, or IR&D.
• Support supervisor review and approval before payroll is processed.
• Retain supporting records under the schedules in FAR Subpart 4.7, which sets a general 3-year default after final payment and specific periods for certain records (for example, payroll registers for 4 years and time cards for 2 years).

DCAA floor checks are unannounced visits in which an auditor walks through the contractor’s facility, asks employees what work they are performing, and compares the answer to the time recorded on their timesheet that day. A pattern of discrepancies, even innocent ones, can escalate into a formal labor mischarging investigation.

Building a DCAA-Compliant Chart of Accounts

The chart of accounts is the backbone of government contractor accounting. It must be structured so that any cost flows to exactly one of three categories: direct, indirect, or unallowable. Accounts should be organized by indirect pool (fringe, overhead, G&A) so that pool totals can be extracted directly without manual reclassification.

For contractors supporting Modus’s audit and assurance practice, this account structure is also the basis for year-end financial statement audits and any agreed-upon procedures engagements the contracting officer may require. A well-structured chart of accounts reduces audit prep time and makes the connection between financial statements and indirect cost submissions traceable without offline spreadsheets.

Working With Your Accounting System and Advisory Team

Selecting accounting software is one of the first decisions a new government contractor faces. Platforms such as Deltek Costpoint, Unanet, and QuickBooks with government-specific configurations are common in the market. The choice matters less than the configuration: even purpose-built government accounting software can be set up incorrectly and fail an SF 1408 review.

A qualified government contract accounting advisor can model the indirect rate structure before contract performance begins, set up the chart of accounts correctly, and establish written policies for timekeeping, unallowable cost identification, and ICS preparation. Modus’s advisory services team works with government contractors at various stages, from pre-award accounting system setup through annual ICS preparation and DCAA audit support.

Investing in the accounting infrastructure before the first cost-type contract award is significantly less expensive than correcting deficiencies under audit. Withheld payments, repayment demands, and suspension from new awards are the practical cost of non-compliance.

Related reading: Brewery and Distillery Accounting: TTB Excise and Costing

Frequently Asked Questions

What is DCAA compliance for government contractors?

DCAA compliance means the contractor’s accounting system meets the criteria established in the Defense Contract Audit Agency’s pre-award checklist (SF 1408) and the cost principles in FAR Part 31. A compliant system can segregate direct and indirect costs, identify unallowable expenses, track labor by contract daily, and produce accurate indirect cost rates that reconcile to the general ledger.

What are indirect cost rates in government contracting?

Indirect cost rates are the percentages applied to direct labor or other bases to recover overhead, fringe benefits, and G&A expenses on a government contract. Contractors establish provisional billing rates at the start of each year and then submit an Incurred Cost Submission within 6 months of fiscal year-end to settle actual rates. Any difference between provisional and final rates results in either a billing adjustment or a repayment to the government.

Does my small business need to comply with Cost Accounting Standards?

Under the CAS Board final rules effective October 1, 2026, CAS applies to negotiated contracts valued above $35 million. Contracts valued at $35 million or less are generally exempt. Full CAS coverage (all 19 standards) applies at the $100 million threshold. Many small and mid-market businesses now fall below the CAS trigger entirely, though FAR Part 31 cost principles still apply regardless of CAS status.

What happens if DCAA finds my accounting system is inadequate?

If DCAA identifies significant deficiencies during a pre-award accounting system audit, the contracting officer can withhold a percentage of contract payments, decline to award a cost-type contract, or require the contractor to implement corrective actions within a set timeframe. Deficiencies discovered after award are more serious because they may indicate costs were already billed incorrectly, which can trigger repayment demands.

What is an Incurred Cost Submission and when is it due?

An Incurred Cost Submission (ICS) is the annual cost report required by FAR 52.216-7 for contractors holding cost-reimbursable contracts. It reconciles the contractor’s actual indirect cost rates for the fiscal year to the provisional rates billed to the government. The ICS is due within 6 months of the contractor’s fiscal year-end. DCAA provides the ICE Model as the standard submission format. A late or inadequate submission can result in suspended reimbursements.

What costs are unallowable under FAR Part 31?

FAR Part 31 prohibits reimbursement for many categories of cost, including entertainment, lobbying, political contributions, interest on debt, alcoholic beverages, and fines or penalties. These costs must be identified and segregated in the accounting system, not just excluded at billing time. Failure to properly identify unallowable costs before they flow into indirect pools is one of the most common findings in DCAA incurred cost audits.