How to lower your workers' comp premium and experience mod.

Your workers' compensation premium starts with your payroll and class codes, but the number that often moves it most is your experience modification factor, also called the experience mod, EMR or X-mod. A mod of 1.25 means you pay about 25% more than an average business in your class. A mod of 0.85 means about 15% less. It can also decide whether you're allowed to bid on a job.

The good news: much of what drives your mod is controllable. Lowering it comes down to three things: making sure the worksheet is right, managing the claims inside it, and preventing the claims that hurt it most.

What the experience mod measures

The mod compares your actual losses to the losses expected for a business with your payroll in your class codes. Most states use the experience rating plan maintained by the National Council on Compensation Insurance (NCCI), including Iowa and Illinois. A handful of states run their own rating bureau or state fund with different rules, so the details below follow the NCCI plan.

• The experience period. The mod generally uses about three years of payroll and loss data. The most recent policy year is left out, because it hasn't been reported to the bureau yet.
• The valuation date. Claims enter the calculation as they stood when your carrier reported them, a snapshot taken months before the mod takes effect. Open reserves count, even if they're never paid.
• Eligibility. Businesses become experience rated once their premium passes a threshold set by each state. Below it, you pay the standard rate for your class.

Why frequency hurts more than severity

This is the part most business owners don't expect. The formula splits every claim into a primary portion, up to a split point set for each state, and an excess portion above it. Primary losses carry much more weight, because a pattern of frequent claims predicts future losses better than one bad accident.

A simple illustration, using a $20,000 split point for round numbers:

Same total losses, but the five smaller claims put two and a half times as much into the primary layer, and will usually push the mod higher. In most NCCI states, claims that pay only medical bills, with no lost-time benefits, count at 30% of their value. Keeping a minor injury from turning into a lost-time claim matters.

Step 1: Review your experience mod worksheet

Mods are calculated from data your carriers report, and errors happen. Before anything else, get the current worksheet from your carrier or broker and check it line by line:

• Payroll and class codes match your audited payroll for each policy year, in the right classifications.
• Claim amounts match your loss runs, including claims that have since closed for less than they were reserved.
• Claims that aren't yours, or that belong to a different entity, policy or state.
• Subrogation recoveries from a third party who caused an injury have been credited.
• Ownership changes were reported correctly, since a mod can follow a business through a sale or merger.

Corrections are submitted to the rating bureau, and the mod is recalculated. Catching an error before renewal is far easier than after.

Step 2: Manage open claims before the valuation date

Because the mod uses a snapshot of each claim, an inflated reserve on an open claim costs you even if the claim later closes for much less. A forward-looking claims strategy works on the claims still open:

• Hold a claims review with your carrier at least once a year, before data is reported for your next mod.
• Ask the adjuster to explain large reserves, and request reductions when a claim has improved.
• Push to close claims that are resolved, so they enter the calculation at their final value.
• Confirm the carrier is pursuing subrogation when someone else caused the injury.

Step 3: Get injured employees back to work

A medical-only claim becomes a lost-time claim once wage-replacement benefits start, and lost-time claims cost far more. A return-to-work program keeps injured employees working within their restrictions:

• Have transitional or light-duty tasks identified before an injury happens.
• Choose an occupational medicine clinic in advance, where your state allows it, so employees are seen quickly by doctors who understand work restrictions.
• Report every injury to your carrier promptly, even minor ones. Late reporting is consistently linked to higher claim costs.
• Name one person to stay in touch with the injured employee, the doctor and the adjuster.

Step 4: Prevent the claims that drive your mod

Because frequency matters most, the best long-term lever is fewer injuries. Look at your loss runs for patterns: the same type of injury, the same task, the same location or the same shift. Then target those with training, equipment, job-site rules and supervision. A written safety program also helps at renewal, because underwriters look at how you manage risk, not just your past losses.

Lower the premium itself, not just the mod

The mod is one multiplier. The rest of the premium deserves the same attention:

• Class codes. Make sure each employee is in the classification that fits the work they actually do. Misclassification is one of the most common causes of overpaying, and of audit surprises.
• Payroll. In NCCI states, the extra pay portion of overtime is generally excluded from premium when your records separate it. Estimate payroll accurately so the year-end audit doesn't bring a large bill.
• Subcontractors. Collect certificates of insurance from every subcontractor. Uninsured subs are often added to your payroll at audit.
• Owners and officers. Some states let owners or officers include or exclude themselves. It's a trade-off between premium and coverage, so decide it deliberately.
• Program structure. Larger accounts may benefit from deductible or other loss-sensitive plans. Some states and carriers also offer credits for certified safety or drug-free workplace programs.

How long until my mod improves?

Because the mod looks back about three years and skips the most recent year, changes take time to show. A claim you prevent this year typically won't help your mod until the following year's rating, and a bad year stays in the calculation for three ratings. That's why worksheet corrections and reserve reviews matter: they're the levers that can help at your very next renewal.

How we help

We help businesses in Des Moines, the Chicago area and nationwide lower their mods. We start by analyzing your mod worksheet and loss runs to find errors and the losses you can still influence. Then we build a forward-looking claims strategy with you and your carrier, and review your classifications and payroll before your next audit. Learn more about workers' compensation insurance, or send us your current mod worksheet for a review.

Frequently asked questions

This article is general information, not legal or insurance advice. Coverage depends on the terms, conditions and exclusions of the policy issued, and availability varies by state and carrier.