Government Contract Compliance: Essential Requirements Guide

The Compliance Failure That Cost a Small Business Its GSA Schedule

In 2022, a small IT services firm lost its GSA Multiple Award Schedule contract after a Defense Contract Audit Agency (DCAA) floor check revealed timekeeping records that could not be reconciled with invoiced labor categories. The firm had been billing senior engineer rates for work performed by junior staff, not through fraud, but through sloppy labor category mapping and zero internal audit activity. The contracting officer issued a cure notice, the firm failed to cure, and the contract was terminated for default. That termination now lives in FAPIIS for anyone running a responsibility determination.

That scenario is not rare. Government contract compliance is not a back-office administrative function. It is the operational framework that keeps your contract active, your invoices paid, and your past performance record clean. This guide covers the specific regulatory areas, documentation requirements, and management practices that federal contractors, especially small businesses, need to get right from contract award through closeout.

The Regulatory Stack You Are Actually Working Under

Every federal contract sits on top of a layered compliance structure. Understanding which layers apply to your specific award is the first step toward building a functional compliance program.

The Federal Acquisition Regulation (FAR)

FAR is the baseline. It governs everything from allowable costs (FAR 31.201) to contractor code of business ethics (FAR 52.203-13) to small business subcontracting plans (FAR 52.219-9). Every clause incorporated into your contract by reference carries the same legal weight as clauses printed in full text. Do not assume a clause is irrelevant because you did not negotiate it. If it is in Section I of your contract, it is enforceable.

Agency Supplements

The Defense Federal Acquisition Regulation Supplement (DFARS), the Health and Human Services Acquisition Regulation (HHSAR), and similar agency supplements layer additional requirements on top of FAR. DFARS 252.204-7012, for example, imposes specific covered defense information (CDI) and controlled technical information (CTI) safeguarding and cyber incident reporting obligations that go well beyond FAR baseline cybersecurity language. If you are working a DoD contract, DFARS clauses are not optional reading.

Cost Accounting Standards (CAS)

CAS coverage depends on contract size and type. Full CAS coverage applies to contracts over $2 million that meet certain criteria, with the threshold for full coverage triggered at $50 million for a single award or when a business unit receives $50 million or more in CAS-covered awards in the preceding cost accounting period. Modified CAS coverage applies to contracts of $2 million or more that do not meet the full coverage thresholds. CAS-covered contracts require a Disclosure Statement (CASB DS-1) that documents your cost accounting practices. Changing those practices without notifying your Administrative Contracting Officer (ACO) can trigger a cost impact analysis and potential liability for increased government costs.

Core Compliance Areas: What Auditors Actually Examine

Accounting System Adequacy

DCAA evaluates contractor accounting systems against the criteria in SF 1408. An adequate accounting system must segregate direct from indirect costs, accumulate costs by contract, and support the preparation of required billings and reports. If your system cannot produce a job cost report by contract number that ties directly to your general ledger, you have a gap that will surface during a pre-award survey or a post-award audit.

Practical steps: set up separate cost centers or project codes for each contract, enforce timesheet completion on the day work is performed (not Friday afternoon for the whole week), and reconcile your billing to your labor distribution report before every invoice submission. DCAA's timekeeping floor checks are unannounced. Employees who cannot explain what they worked on the previous day are a red flag that triggers expanded audit scope.

Cybersecurity and CUI Handling

The Cybersecurity Maturity Model Certification (CMMC) framework is now embedded in DoD acquisitions. CMMC Level 2 requires implementation of all 110 practices mapped to the 14 domains of NIST SP 800-171. If your contract involves CUI and you have not completed a System Security Plan (SSP) and a Plan of Action and Milestones (POA&M), you are out of compliance with DFARS 252.204-7012 today, regardless of whether an assessor has visited.

Beyond DoD, civilian agency contracts increasingly cite NIST SP 800-53 controls, FISMA requirements, and agency-specific data handling standards. HHS contracts handling protected health information carry HIPAA obligations. Payment processing on any contract may trigger PCI DSS requirements. Map your CUI categories and data flows before you write your first security plan, not after.

Labor and Employment Compliance

Service contracts over the applicable threshold are covered by the Service Contract Act (SCA), which mandates wage determinations by locality and occupation. Using the wrong wage determination, or failing to update it when the contracting officer issues a wage determination revision, creates back-pay liability that can exceed your contract profit margin. Pull the applicable Wage Determination from SAM.gov at award and again at each option exercise.

The Walsh-Healey Public Contracts Act applies to supply contracts over $15,000. Davis-Bacon applies to construction contracts over $2,000. Know which statute governs your contract type before you finalize your labor cost structure.

Building a Compliance Management System That Survives an Audit

Documentation Protocols

Your documentation is your defense. During a DCAA audit or a contracting officer's review, if it is not written down, it did not happen. Establish a contract file structure that includes, at minimum:

• The executed contract and all modifications (bilateral and unilateral)
• All correspondence with the Contracting Officer (CO) and Contracting Officer's Representative (COR)
• Invoices and supporting cost backup (labor distribution reports, subcontractor invoices, ODC receipts)
• Subcontract agreements and flow-down clause documentation
• Timekeeping records and labor category justifications
• Security clearance and personnel eligibility documentation
• Quality assurance records, inspection reports, and deliverable acceptance documentation
• Training completion records by employee and compliance topic

FAR 4.703 requires contractors to retain most records for three years after final payment under the contract. Some categories, including cost or pricing data and CAS-related records, carry longer retention requirements. Build your retention schedule from the contract clauses, not from a generic records policy.

Internal Audit Cadence

Quarterly compliance reviews are the minimum viable cadence for active contracts. Each review should cover: invoice accuracy versus contract line item structure, labor category alignment, subcontractor invoice review and flow-down compliance, open POA&M items, and any unresolved COR correspondence. Assign a specific owner for each review item and document the results. If DCAA or an Inspector General shows up, your internal audit trail demonstrates a functioning compliance program, which matters significantly in penalty determinations.

Subcontractor Compliance: The Prime's Liability Does Not Stop at Your Firewall

FAR 52.244-2 and the small business subcontracting plan requirements under FAR 52.219-9 make clear that prime contractors own their subcontractor compliance posture. A subcontractor's CMMC gap is your CMMC gap. A subcontractor billing unallowable costs on a cost-reimbursement task order is your unallowable cost problem.

Flow down the applicable FAR and DFARS clauses in every subcontract. Require subcontractors to submit their own SSPs and POA&Ms for CUI-handling work. Conduct at least annual compliance reviews of major subcontractors, and document those reviews. When a subcontractor misses a compliance milestone, issue a written corrective action request and track resolution. That paper trail protects you if the government later questions subcontractor performance.

Responding to Compliance Issues: Voluntary Disclosure vs. Getting Caught

FAR 52.203-13 requires contractors with contracts over $5.5 million and performance periods of 120 days or more to have a written code of business ethics, an internal control system, and a mechanism for employees to report violations anonymously. It also requires timely disclosure of credible evidence of violations of federal criminal law or the False Claims Act.

Voluntary disclosure, done correctly and promptly, consistently results in more favorable treatment than violations discovered during audit. The Department of Justice's declination decisions in False Claims Act matters routinely cite early self-disclosure as a determining factor. When you find a problem, document your discovery process, engage counsel if the exposure is material, and contact your ACO with a written disclosure and a corrective action plan. Do not wait for the DCAA auditor to find it first.

Practical Takeaway

Government contract compliance is not a checklist you complete at award and file away. It is an ongoing operational discipline tied directly to your ability to invoice, retain your contract, and build the past performance record that wins the next award. Start with the clauses in your contract's Section I, map them to your accounting system, your cybersecurity posture, and your labor practices, then build a documentation and audit routine that can withstand an unannounced DCAA floor check or a contracting officer's show-cause letter. Tools like Winrove (from IT Custom Solution LLC, plans from $49/mo) can help you track solicitation requirements and compliance obligations during the capture and proposal phase, before you are already under contract and under scrutiny.