What to Expect When Your Contractor Insurance Policy Gets Audited

Contractor insurance audits are routine, annual events — and they consistently surprise contractors who didn't prepare for them. Understanding how audits work lets you maintain better records, challenge errors, and avoid the large "audit premium" that hits without warning.

What gets audited

Two lines are commonly audited at year-end:

Commercial General Liability (CGL): Rated on your actual payroll, revenue, or subcontractor costs (varies by carrier and state). If your business grew faster than projected, you owe additional premium. If it contracted, you get a credit.

Workers' Compensation: Rated on actual payroll by class code. The audit verifies that your payroll was correctly reported and classified, and that all employees were included.

Other lines (commercial auto, umbrella) may also audit but typically not on the same payroll basis.

What auditors ask for

Expect to provide:

• 941 payroll tax returns — quarterly federal payroll reports, the primary audit source
• W-2s and 1099-NECs — to identify all compensation paid
• General ledger — for revenue-based GL ratings
• Subcontractor payment records — 1099s and subcontract agreements
• Certificates of insurance from subcontractors — to exclude qualified subs from your audit
• Job cost records — sometimes used for revenue allocation by state or class
• State unemployment returns (SUI) — alternative payroll documentation

The subcontractor certificate rule

This is where most contractors get burned. If you paid a subcontractor and that sub cannot provide a valid certificate of insurance showing their own workers' comp and GL, the auditor will typically include that payment in your audit — as if those sub workers were your employees.

A $50,000 payment to an uninsured sub is $50,000 added to your premium base, priced at your workers' comp rate. On a carpentry rate of $12–$20 per $100 of payroll, that's $6,000–$10,000 in unexpected premium.

The rule: Collect certificates from every subcontractor before they start work and keep them on file. Name yourself as additional insured on their GL. This is not optional if you want a clean audit.

Class code disputes

Workers' comp premium is calculated by class code — and auditors sometimes reclassify employees into different codes than originally assigned. Common situations:

Upward reclassification: Auditor determines employees doing light commercial work should be in a heavier code than residential. Premium goes up.

Legitimate challenges: If you can document that certain employees' duties are genuinely clerical, sales, or executive (codes 8810, 8742, 8809), you can dispute field classifications that don't match actual work. Keep job descriptions and time records.

Multi-state crews: If your employees work in multiple states, payroll must be allocated by state — each state has its own rates. Failure to split payroll often results in the highest-rate state getting all of it.

Payroll vs. revenue-based GL rating

Some GL policies rate on payroll (common for contractors where labor is the primary cost driver). Others rate on revenue or total contract price. Know which basis your policy uses:

• If rated on payroll: keep detailed payroll by class code. Document officer/owner compensation separately — officers are sometimes excluded or rated at a fixed amount.
• If rated on revenue: track gross revenue carefully. Subcontract costs passed through may or may not be included depending on the policy form.

What happens after the audit

The auditor sends findings to the carrier. The carrier issues an audit statement showing:

• Estimated premium (what you paid during the year)
• Actual developed premium (what you owe based on audit)
• Audit balance due or credit

If you owe, you'll typically have 30 days to pay. If you dispute the findings, act immediately — you generally have a limited window to challenge audit results. Disputes usually involve providing additional documentation to support reclassification or to exclude subcontractor payments.

How to minimize audit surprises

1. Track actual payroll in real time — don't wait for year-end to reconcile
2. Update your carrier mid-year if payroll or revenue grows significantly — adjust your deposit premium before the audit catches it
3. Collect sub certificates before day one — no cert = included in your audit
4. Document officer duties — if officers don't do field work, get that on record
5. Keep clean job cost records — especially if you work in multiple states
6. Request a pre-audit review — some carriers allow a self-audit submission before the formal audit, reducing surprises

---

Contractors Choice Agency helps clients prepare for and dispute audits. Call 844-967-5247 or get a quote online.