The Workers’ Comp Audit Survival Guide

The workers’ comp audit is the only insurance bill you get after the coverage year ends — and for unprepared businesses, it’s where the real premium damage happens. Auditors verify what you actually paid in payroll, who actually worked for you, and whether your class codes match what your crews actually did. Here’s how to come out clean.

What the auditor is actually checking

Payroll totals against your 941s, state filings, and books — including overtime handling, which many states discount to straight time if your records separate it

Class code assignments — whether the work performed matches the codes quoted, and whether payroll splits between codes are supported by verifiable records

Subcontractors and 1099 labor — anyone without their own coverage is a candidate to be added to your payroll at the applicable class rate

Owners and officers — inclusion, exclusion, and the payroll caps and minimums that apply to them

The records that win audits

Quarterly 941s and state unemployment filings, a payroll register that separates employees by class of work, overtime broken out separately, certificates of insurance from every subcontractor covering your policy period, and cash disbursement records for anyone you paid outside payroll. The overtime and class-split records are pure money: without them, auditors use the highest applicable treatment.

The subcontractor rule that eats contractors alive

In nearly every state, an uninsured subcontractor’s payroll becomes your payroll at audit — at your class rates. A framing sub you paid $80,000 without a valid certificate can add five figures to your audit bill in one line. The fix costs nothing: collect a current certificate of insurance from every sub before they start, confirm the dates cover your policy period, and keep them filed. We chase certificates for our clients as part of the service.

Disputing an audit that’s wrong

Audits are correctable. If payroll was double-counted, class codes misapplied, or insured subs charged as uninsured, you can dispute — carriers have formal review processes and state mechanisms back them up. The catch: disputes run on documentation, and deadlines run fast, especially if a disputed audit bill goes to collections or triggers cancellation. Bring your agent in the moment an audit looks wrong, not after the second notice.

How pay-as-you-go changes the audit

Pay-as-you-go billing calculates premium from actual payroll all year, so the audit generally confirms what you paid instead of producing a surprise. For seasonal businesses, it’s the difference between an audit as paperwork and an audit as crisis.

Facing an audit now, or still angry about the last one? Talk to us — audit support is built into how we service every account, in New Jersey and across the country.