Overview
Insurance audits review the actual exposures you reported when your policy was issued so insurers can adjust premium up or down. Payroll-based audits like workers' compensation are common because payroll fluctuates and directly affects premium. Preparing ahead makes audits quicker and often saves money.
Key takeaways
- Choose a policy period that matches an existing internal reporting cycle to simplify the audit.
- Separate straight-time payroll from overtime because premium calculations often discount overtime.
- Keep Certificates of Insurance (COI) and subcontractor payment records to reduce reported exposures.
How it works
Auditors compare the exposure units (for example, payroll, sales, or square footage) you reported to the insurer with your actual records for the policy period. If you underreported, you may owe additional premium; if you overreported, you may receive a refund or credit.
Some policies use payroll as the exposure unit, while others use sales or square footage depending on the risk. If you need industry-specific guidance on how audits affect contractor coverage, review Workers' Compensation Audit and Employee Coverage for practical examples and classifications.
What it may cover (and what it may not)
Typical payroll audits will verify employee wages, classified payroll by job code, subcontractor payments, and any payroll exclusions such as certain volunteers or independent contractors. Recordkeeping for job descriptions and hours helps ensure correct classification and rates.
General liability audits may measure exposure units differently, such as sales or square footage, which means some audits will focus on receipts or leased area rather than payroll. For contractor-focused scenarios and how class codes affect premiums, see Contractors Workers Compensation.
Common mistakes to avoid
Mixing overtime with straight-time payroll is a frequent error; overtime is often discounted for workers' compensation and should be tracked separately. Failing to collect COIs or to document subcontractor work scope can lead to higher reported exposure and incorrect class codes.
Other mistakes include choosing a policy period that doesn't align with your internal reporting, providing incomplete payment records, and not reconciling payroll tax filings before the audit.
Questions to ask an agent
Ask which exposure unit (payroll, sales, square footage) the insurer will use and whether alternative units could reduce audit volatility. Request guidance on correct class codes for specific tasks and which subcontractor activities require a COI.
If you want carrier-specific audit strategies, you can review options like Alliance Audit Insurance to compare how different carriers handle audit adjustments and exposure measurements.
Next steps
Before an audit: align your policy period with quarterly tax or financial reporting, separate overtime from straight time, collect and file COIs for subcontractors, and keep clear descriptions of work performed for accurate class coding. Maintain a simple audit folder with payroll summaries, tax filings, subcontractor invoices, and COIs.
If you prefer a hands-on review, talk to your agent about pre-audit preparation and classification questions; you can also ask your agent for a policy review to confirm exposure units and record requirements. Proactive preparation reduces surprises and may lower your final audit adjustment.
Frequently Asked Questions
What documents should I have ready for a workers' compensation audit?
Prepare payroll registers, quarterly tax filings, payroll tax deposits, subcontractor invoices and payment records, and Certificates of Insurance for subcontractors.
How is overtime treated in a workers' compensation audit?
Overtime is often excluded or discounted for premium calculations, so tracking straight time separately can reduce reported exposure.
Will missing a subcontractor COI automatically increase my premium?
If a COI is missing, auditors may include subcontractor payments as payroll exposure, which can raise premium; good records can help argue for proper treatment.
Can I change the exposure unit on my policy to reduce audit volatility?
Some policies allow different exposure units; discuss alternatives with your agent to find the unit that best matches how your business reports activity.