How to Prepare for a Workers’ Comp Premium Audit (and Not Overpay)

A workers’ comp premium audit reconciles the estimated payroll your policy was priced on against what you actually paid over the term, and the result either credits you or bills you for the difference. You avoid overpaying by having clean payroll records, correct class-code splits, and documentation for subcontractors and excluded owners ready before the auditor arrives.

Key takeaways

• Audits are routine, not an accusation. They true up estimated payroll to actual payroll.
• Overtime is usually reported at straight-time wages. Reporting gross overtime overstates payroll and premium.
• Certificates of insurance for subcontractors keep their payroll off your bill.
• Split clerical and outside-sales payroll into the correct lower-rated codes before the audit, not after.

What a premium audit is and why it happens

Your workers’ comp premium starts as an estimate based on projected payroll. At the end of the policy term the carrier audits your actual figures and adjusts. If you paid less payroll than projected, you get money back; if you paid more, you owe the difference. Almost every policy is audited in some form. It is a normal part of how workers’ comp is priced, not a sign that anything is wrong.

Records to have ready

Have your payroll records for the full policy period, broken out by employee and class code; your quarterly tax filings; a list of any subcontractors with their certificates of insurance; and documentation of owner or officer status. Overtime records should show both hours and the wage breakdown. Clean, organized records are the single biggest factor in an audit that goes in your favor, because the auditor works from what you can document.

The overtime overpayment most employers miss

In most states, overtime wages are reported to workers’ comp at the straight-time rate, not the full time-and-a-half. If you report the gross overtime figure, you overstate your payroll and pay premium on wages that should have been excluded. This is one of the most common and most expensive audit errors, and it is entirely avoidable by breaking out the overtime premium portion in your records before the audit.

Subcontractors and certificates of insurance

If you use subcontractors who carry their own workers’ comp, their payroll should not be charged to your policy, but only if you can prove they were covered. That proof is the certificate of insurance. Without a valid COI for the policy period, an auditor will typically add that subcontractor’s payroll to yours and charge you premium on it. Collecting COIs as you go, not scrambling at audit time, keeps that payroll off your bill.

Owner and officer inclusions and exclusions

Depending on your state and entity type, owners and officers may be included or excluded from workers’ comp coverage, and the rules affect how much of their pay counts toward premium. Excluded owners generally should not have their full compensation charged. Make sure your election is documented correctly and reflected in the audit, because a default assumption can add significant payroll that does not belong there.

What to do if the audit result looks wrong

If an audit bill looks too high, do not just pay it. You typically have a window to dispute the results. Common recoverable errors include overtime reported at gross, subcontractor payroll added despite valid coverage, misapplied class codes, and included owner pay that should have been excluded. Gather the documentation that supports the correction and file the dispute promptly. An advocate can review the audit worksheet and identify what is actually recoverable before the deadline passes.

Frequently asked questions

What is a workers’ comp premium audit?

It is the end-of-term reconciliation that compares the estimated payroll your policy was priced on to your actual payroll. If you owe more, you are billed the difference; if you paid too much, you are credited.

How is overtime reported for workers’ comp?

In most states overtime is reported at the straight-time wage, not the full time-and-a-half. Reporting gross overtime overstates payroll and inflates premium, so the overtime premium portion should be broken out in your records.

Can I dispute a workers’ comp audit?

Yes. You typically have a window to dispute. Recoverable errors include gross overtime, subcontractor payroll added despite valid certificates of insurance, misapplied class codes, and excluded owner pay charged as included. Support the correction with documentation and file before the deadline.

Related guides

• Workers’ Comp Class Codes Explained
• Experience Mod 101
• Workers’ Comp Declined? What to Do Next