Workers’ Comp Audit Checklist: The Records to Gather First

A workers' compensation premium audit reconciles the payroll and job classifications your insurer estimated at the start of your policy with what actually happened during the coverage period. The auditor's job is to assign the right class codes to the right wages—and to catch payments that didn't appear in your payroll records. Your job is to have two layers of documentation ready: primary records that show what was paid, and secondary records that verify those numbers independently.

According to Travelers' premium audit preparation guidance, the auditor must review payroll reports as the primary source and then cross-check those figures against tax records as a verification source. The auditor may also examine other payment records—checkbooks, cash receipts, general ledgers—to find compensation not captured in payroll reports. Start gathering documents in both categories before your appointment notice arrives.

Travelers' required-documents page describes the structure directly: "Two types of documents are required to complete your audit: a primary source showing transactions or payments during your policy period and a secondary source, such as a tax document that is used to verify the primary source."

Documents do not need to be printed; electronic records are acceptable. The specific list varies by policy type and premium basis, so check your appointment confirmation letter or your insurer's audit portal for the exact requirements that apply to your policy.

Primary sources (what was paid)

• Payroll reports from your payroll service or software
• Checkbook registers and cash disbursement journals
• General ledger entries for compensation
• Cash receipts showing payments to workers

Verification sources (confirming those numbers)

• Federal Form 941 (Employer's Quarterly Federal Tax Return)
• State Unemployment Wage reports
• Form 1099s issued to independent contractors
• Schedule C (Form 1040C) for sole proprietors
• Form 1120 (corporate return) or Form 1065 (partnership return), depending on entity type

Travelers notes that your tax records are confidential and used only for completing the audit. If your payroll service supplies data directly to the insurer's online system, your reports may be pre-populated—but you should still have the underlying records accessible in case the auditor asks to verify specific entries.

Use the matrix below as a personal worksheet. Fill in each row with the document name, where it lives (folder path, payroll portal, filing cabinet drawer), the date range it covers, and whether it has been pulled and reviewed. This is an organizational tool, not a legal compliance checklist—your insurer or a licensed professional can tell you which documents are required for your specific policy.

Document Category	Document Name	Where to Find It	Period Covered	Pulled?
Payroll — Primary	Payroll service reports (by employee, by quarter)	Payroll portal / download	Policy start → end date	☐
Payroll — Primary	General ledger payroll entries	Accounting software	Policy start → end date	☐
Payroll — Primary	Cash disbursement journal	Checkbook / bank records	Policy start → end date	☐
Payroll — Primary	Cash receipts for day labor or piece-work	Cash records file	Each payment date	☐
Tax — Verification	Federal Form 941 (all quarters)	IRS online account or file	Each quarter in policy	☐
Tax — Verification	State Unemployment Wage reports	State workforce agency	Each quarter in policy	☐
Tax — Verification	1099s issued to contractors	Accounts payable records	Policy year	☐
Tax — Verification	Schedule C / Form 1120 / Form 1065	Tax preparer or file	Most recent filed year	☐
Work Descriptions	Job titles and duty descriptions by employee	HR file or org chart	Current as of audit	☐
Work Descriptions	Written descriptions of each class code used	Prior audit correspondence	Policy inception	☐
Off-Payroll Labor	Subcontractor invoices	Accounts payable	Policy period	☐
Off-Payroll Labor	Certificates of insurance (subcontractors)	Contract file	Policy period	☐
Off-Payroll Labor	Independent contractor agreements	Contract file	Policy period	☐
Operations (assigned risk only)	Photo of office or job-site workspace	Phone or file	Current	☐

The auditor's core task is to match wages to job classifications. Workers who perform multiple types of work may be split across more than one class code—but this depends on your policy terms and how duties are documented. If you cannot separate an employee's time between two different roles in your records, the auditor may apply the classification with the higher rate to the entire wage. Ask your insurer or agent what documentation standards apply for separating classifications under your specific policy before the audit.

For payroll-based general liability policies, the same payroll records often serve double duty. The Travelers audit preparation guidance notes that payroll is needed for both workers' compensation and payroll-based general liability audits—so organizing once can serve both purposes.

Payments to subcontractors, day laborers, and 1099 workers are a common audit focus because they may be treated as payroll for audit purposes if the subcontractor cannot provide a valid certificate of insurance showing their own workers' compensation coverage. Gather every subcontractor invoice from the policy period along with the matching certificate of insurance. If a certificate is missing or expired for any part of the work period, your auditor may include those payments in your audit payroll. Consult a licensed insurance professional or your agent about how your specific policy handles uninsured subcontractors before the audit conversation begins.

The 1099 forms in your verification stack serve two roles: they verify total payments to contractors and they may be examined to determine whether any payments are reclassified. Have them ready alongside the corresponding invoices and contracts.

Class codes drive your rate. If employee duties have changed since your policy was written—a warehouse worker who now does delivery driving, or an office administrator who occasionally assists in the shop—those changes should be reflected in your documentation. Written job descriptions do not need to be elaborate, but they should accurately capture what each group of employees actually does.

For assigned-risk or residual-market workers' compensation policies conducted virtually, Travelers notes that NCCI recommends obtaining a photograph of the operations—for example, the office space where administrative staff work, or the job site for construction trades. Confirm with your insurer whether a photo is required for your audit type.

Before meeting with an auditor, it can help to run a rough internal check on whether your payroll figures align with what you estimated at policy inception. The PolicyBenchmark Workers' Comp Calculator lets you enter payroll amounts and compare user-entered modifiers against a pre-modification subject premium. This is a planning and preparation tool only—it does not calculate an official experience modification rate, supply market rates, establish class code eligibility, or produce a complete policy premium. Use it to spot large discrepancies between your estimated and actual payroll before the auditor identifies them.

For background on how payroll and classification interact with your overall premium, see Workers' Comp Costs: Payroll, Classification and Quote Differences, which explains the inputs behind a workers' compensation quote without presenting them as market pricing.

1. Pull both document layers. Payroll records as the primary source; tax filings as the verification source. Confirm they reconcile before the auditor compares them.
2. Account for every worker. Full-time, part-time, seasonal, temporary, and leased employees should all appear somewhere in your records. Subcontractors should have certificates of insurance on file.
3. Write down actual job duties. A one-paragraph description per classification is enough. Note if duties changed during the policy period and when.
4. Collect subcontractor certificates. Match each certificate date range to the period of work. Flag any gaps.
5. Know your policy type. Standard, assigned-risk, and residual-market policies may have different audit procedures and document requirements. Your appointment confirmation letter or the insurer's audit portal will specify what applies to you.
6. Ask questions in advance. If you are unsure how a particular payment—owner draws, overtime premium, sick pay, severance—is treated, contact your agent or insurer before the audit, not after.

For a broader explanation of what workers' compensation covers and how the policy is structured, see Workers' Compensation Insurance: Requirements, Costs & Coverage.

• Which class codes are currently listed on my policy, and do they still match what my employees actually do?
• How does my policy define payroll for audit purposes—does it include overtime premiums, bonuses, or owner compensation?
• If a subcontractor's certificate of insurance has a gap, how will those payments be treated?
• Are there any payroll items I reported at policy inception that differ materially from actual payroll, and how should I document that difference?
• If I have employees who work in multiple states, which state's rules apply to each portion of their wages?

If you have additional questions about your specific situation, you can use the PolicyBenchmark coverage inquiry form to share your business details. No quote or provider connection is promised.

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Document requirements vary by insurer, policy type, state, and premium basis. The matrix above is an organizational worksheet, not a legally required form or compliance checklist. Consult a licensed insurance professional for guidance specific to your policy and jurisdiction.