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How Workers’ Compensation Premiums Are Calculated

How Workers’ Compensation Premiums Are Calculated

Jul 23, 2025

Workers' Compensation Insurance

Calculation of workers' compensation premium

For business owners, understanding how workers’ compensation premiums are calculated is essential for budgeting, risk management, and ensuring compliance with state laws. Whether you’re a small business owner or managing a larger team, knowing the ins and outs of premium calculations can help you make informed decisions and potentially save money. Here’s a comprehensive guide to demystify the process, with actionable tips for East End Insurance Agency clients.

What Is Workers’ Compensation Insurance?

Workers’ compensation insurance is a state-mandated program that provides benefits to employees who are injured or become ill as a result of their job. It covers medical expenses, lost wages, and rehabilitation costs, and protects employers from most lawsuits related to workplace injuries.

The Building Blocks of Workers’ Compensation Premiums

Calculating workers’ compensation premiums involves several key factors. Here’s how the process typically works:

  1. Payroll Size

    Your total payroll is the foundation for your premium calculation. The larger your payroll, the higher your premium, because you’re insuring more hours and more people. Premiums are usually calculated per $100 of payroll.

  2. Industry Classification Code

    Every business is assigned an industry classification code by the National Council on Compensation Insurance (NCCI) or your state’s rating bureau. These codes reflect the level of risk associated with the work your employees perform. High-risk jobs, like construction, have higher rates than low-risk jobs, such as office work.

  3. Experience Modification Rate (ExMod)

    After a few years in business, your claims history is factored into your premium through the Experience Modification Rate (ExMod). This number compares your business’s claims history to others in your industry. A lower ExMod (below 1.0) means you’ve had fewer claims than average and may pay less, while a higher ExMod (above 1.0) means more claims and potentially higher premiums.

  4. Location

    Premiums can vary by state due to differences in regulations, benefit levels, and claims frequency. For example, rates in New York may differ significantly from those in California or Texas.

  5. Policy Limits and Deductibles

    Higher policy limits or lower deductibles can increase your premium. Discuss your options with your insurance agent to find the right balance between coverage and cost.

The Workers’ Compensation Premium Formula

Here’s the standard formula used to calculate your workers’ compensation premium:

Premium=Payroll100×Rate×ExModPremium=100Payroll×Rate×ExMod
Example: Suppose your business has a $500,000 payroll, your industry rate is $3 per $100 of payroll, and your ExMod is 1.2. Your premium would be: 500,000100×3×1.2=5,000×3×1.2=$18,000100500,000×3×1.2=5,000×3×1.2=$18,000
This is just an estimate, your actual premium may vary based on additional factors.

How to Reduce Your Workers’ Compensation Premiums

  • Prioritize Safety: Implement a robust safety program to reduce workplace injuries and claims.

  • Return-to-Work Programs: Help injured employees return to work as soon as medically possible to minimize lost wages and claims costs.

  • Review Your Classification Codes: Ensure your employees are classified correctly to avoid overpaying.

  • Monitor Claims: Address claims promptly and work with your insurance provider to resolve them efficiently.

Government Resources for Workers’ Compensation

For authoritative information and state-specific guidelines, consult these resources:

Why Partner with East End Insurance Agency?

At East End Insurance Agency, we understand that every business is unique. Our team works closely with you to tailor a workers’ compensation policy that fits your needs, helps you stay compliant, and protects your bottom line. Whether you’re a small business owner in Southold or managing a larger team on Long Island, we’re here to help you navigate the complexities of workers’ compensation insurance.

Final Thoughts

Calculating workers’ compensation premiums doesn’t have to be a mystery. By understanding the key factors, payroll, classification code, experience modification rate, and location—you can make informed decisions and potentially reduce your costs. Partnering with a trusted insurance agency like East End Insurance Agency ensures you get the coverage you need at a price that works for your business.

For personalized assistance and a free quote, contact us today at East End Insurance Agency. Let us help you protect your business and your team. You can also give us a call at 631-765-3811.

FAQs

  1. What happens if I underestimate my payroll for workers’ compensation insurance?

    If you underestimate your payroll, your insurer will conduct an audit at the end of the policy period and require you to pay any additional premium owed.

  2. Can I change my industry classification code if I think it’s incorrect?

    Yes, you can request a review of your classification code with your insurer or state rating bureau if you believe it does not accurately reflect your business operations.

  3. How often is my Experience Modification Rate updated?

    Your ExMod is typically updated annually, based on the most recent three years of claims history.

  4. Are there penalties for not having workers’ compensation insurance?

    Yes, most states impose significant fines and penalties for non-compliance, including potential criminal charges in some cases.

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