Workers' Comp Audit Surprises for Remodeling Contractors (and How to Avoid Them)

Workers' compensation premiums for remodeling contractors are calculated upfront based on estimated payroll — then audited at year-end based on actual payroll. The difference between your estimate and your actual payroll is where most audit surprises come from.

A year with more projects, more hours, and more crew members than you estimated can result in a significant audit bill. Understanding what drives audits — and how to manage them — is part of running a remodeling business.

How the Audit Works

Your workers' comp premium for the year is based on:

1. Estimated payroll by class code, provided when you bind the policy
2. Rate per $100 of payroll for each class code (set by your state's rating bureau)
3. Experience modification factor applied to the total

At year-end, the carrier audits your actual payroll, compares it to your estimate, and either issues a return premium (if your actual payroll was lower) or a bill for additional premium (if it was higher). Most remodeling contractors receive a bill because they underestimate how busy they'll be.

The Most Common Audit Surprises

Growing revenue mid-year. You estimated payroll based on last year's business level, then had a banner year. More revenue means more labor — either from existing employees working more hours or from new hires.

New employees added during the year. If you hire a new crew member in June and they work the rest of the year, their payroll wasn't in your original estimate.

Misclassification of employees. An employee who spends most of their time on jobsites should be in a field class code (5645 for carpentry, 5474 for painting, etc.), not office staff (8742). If you initially classified someone in a low-rate code and they actually do field work, the audit reclassifies them at the higher field rate.

Overtime. In most states, overtime pay above 1.5× the regular hourly rate is partially excluded from workers' comp payroll for audit purposes. But the rules vary by state, and if you're not tracking overtime correctly, you may overpay.

Subcontractor misclassification. If you pay 1099 subcontractors who don't have their own workers' comp, many carriers will add their compensation to your payroll during the audit. This is a significant source of surprise bills for remodelers who use subs heavily without requiring certificates.

How to Manage Subcontractor Exposure at Audit

This is the biggest lever for remodeling contractors. Here's what the carrier expects:

Certificate of insurance on file. For every sub you use, get a certificate showing their workers' comp policy is active with limits equal to or greater than yours. Keep these on file.

Certificate expiration. A certificate that was valid when the sub started but expired three months in is a problem. Track expiration dates and require renewals. If the sub's policy lapses during your project, that period of uninsured sub work may be added to your payroll at audit.

True independent contractor vs. employee. State workers' comp rules for who counts as an independent contractor vary significantly. Some states apply strict tests (sole proprietors with no employees may not qualify as independent contractors under comp). If you're unsure about your sub arrangements, ask your agent before the policy year ends.

The Right Class Code Matters

Remodeling work crosses multiple class codes. Getting them right at inception prevents reclassification at audit:

| Work Type | Class Code | Notes | |---|---|---| | General carpentry, framing | 5645 | Residential construction/remodeling | | Interior trim, finish carpentry | 5645 | Same code, different description | | Painting (residential) | 5474 | Includes interior and exterior | | Tile, stone, marble work | 5022 | For tile setters | | Plumbing (residential) | 5183 | Includes helpers | | Electrical wiring | 5190 | Licensed electricians | | Drywall/plastering | 5480 | Hanging and finishing | | Clerical/office | 8742 | Must actually be non-field work |

If your employees do multiple types of work, they're generally assigned to the highest-rated code for the majority of their work time. Some policies allow splitting payroll between codes for employees who clearly divide their time — ask your carrier whether they allow this.

Tracking Payroll During the Year

The cleanest way to avoid audit surprises is to track payroll by class code throughout the year, not just at audit time:

• Record which code each employee's work falls under each pay period
• Separate overtime from regular time (if your state has an overtime exclusion)
• Keep certificates of insurance for every sub organized by project
• Update your estimated payroll mid-year if your business is growing significantly faster than projected

Some carriers allow mid-policy payroll estimates to be revised — proactively adjusting prevents a large lump-sum audit bill at year-end.

What to Do If You Get a Large Audit Bill

If the audit bill is larger than expected, you have a few options:

Request a copy of the audit worksheet. Understand exactly what the carrier added to your payroll and what class codes they used. Errors happen.

Dispute misclassified employees or subcontractors. If the carrier added a sub's compensation to your payroll but you have a certificate showing they had their own coverage during that period, dispute it with documentation.

Set up a payment plan. Most carriers will accept installment payments on large audit bills rather than requiring full payment at once.

Work with your agent. We can review the audit with you, identify items that may have been calculated incorrectly, and negotiate disputed amounts.

Get Your Workers' Comp Reviewed

If you've received large audit bills in the past, or if your business has grown significantly, your workers' comp program may need to be restructured. We can review your class codes, your subcontractor documentation practices, and your payroll tracking to reduce audit exposure.

Call 844-967-5247 or request a review at contractorschoiceagency.com.