Workers' comp premium audits: built on one bad number.
The short answer
Workers' compensation premiums are calculated from job classification codes and an experience modification factor, and both are set once and rarely rechecked. A work comp audit reviews the classification codes against the actual work being done and the experience modification calculation against your real claims history, then corrects what is wrong, lowering the premium going forward.
A workers' comp premium is not a single number set by your carrier's judgment. It is built from a formula: job classification codes tied to your payroll, multiplied by a rate for each code, adjusted by an experience modification factor based on your claims history. Every part of that formula is a place a small error can quietly inflate what you pay, year after year, without anyone flagging it.
New York employers: statewide rates are dropping 22% on October 1, 2026, but that does not fix the two numbers below on its own. See what the rate cut actually changes, and what it doesn't →
Where the errors actually hide
- Misclassified employees. Office and administrative staff coded under a higher-risk classification than the work they actually do, or a job that changed over time without the code being updated.
- Payroll reporting errors. Overtime, bonuses, or certain payroll categories reported in a way that inflates the base the premium is calculated on.
- Experience modification errors. A claim recorded incorrectly, counted twice, or never properly closed out, all of which can push your modifier above where it should sit.
- Outdated policy structure. Coverage and classifications that were set up years ago and never revisited as the business changed.
What an audit actually checks
A specialist reviews your policy, payroll records, and loss runs against the actual classification codes assigned, verifies the experience modification calculation line by line against your real claims history, and identifies where the numbers do not match reality. Where an error is found, they work with the carrier or rating bureau to get it corrected.
Who is a candidate for this?
- Employers who have not had their classification codes reviewed since the policy was first written.
- Businesses whose job mix or staffing has changed since the policy was set up.
- Any employer with a past claim on record, since that is exactly where experience modification errors tend to live.
The same pattern shows up in other recurring costs that get set once and never rechecked. If you also accept card payments, a merchant fee audit tends to turn up the same kind of drift.
What to watch for
- This does not touch your coverage. The review corrects the numbers behind the premium, not your policy or your carrier relationship.
- Documentation drives the outcome. Payroll records and job descriptions matter; the more complete the picture, the stronger the case for a correction.
- It is worth rechecking periodically. Classification and experience modification errors can creep back in as staffing and claims history change.
How Tappmedia fits
We do not review your policy or file the correction ourselves. Our role is strategic connection. We help you see whether a real opportunity exists, introduce you to a specialized cost-recovery partner who performs the audit and handles the correction with your carrier, and stay in the conversation through delivery. As disclosed above, we are paid a referral fee if you engage them.
Common questions
What is an experience modification factor?
It is a multiplier, generally centered around 1.0, applied to your workers' comp premium based on your company's claims history relative to similar businesses. A single data error in how a past claim was recorded can push that number higher than it should be, and it compounds every year it goes uncorrected.
How does employee misclassification increase a work comp premium?
Every job classification code carries its own rate based on the risk of that type of work. Office staff coded under a higher-risk classification, or a payroll split that was never properly documented, can inflate the premium significantly. A review checks whether every code on your policy actually matches the work being done.
Does a work comp audit affect my current coverage?
No. The review does not change your coverage or your carrier. It checks the classification codes, payroll reporting, and experience modification calculation behind your premium, and corrects what is wrong through your existing policy structure.
Is Tappmedia paid for referring the specialist?
Yes. Donald Tapper and Tappmedia NYC are independent referral representatives for our specialized cost-recovery partner and may earn a referral fee if you engage them. It costs you nothing extra, and the audit itself is performed by the specialist, not by Tappmedia.
Referral disclosure: Donald Tapper and Tappmedia NYC are independent referral representatives for a specialized cost-recovery partner and may receive a referral fee if you engage them, at no additional cost to you. This article is general information, not insurance, tax, legal, or accounting advice, and it does not create an advisor-client relationship. Workers' compensation rules and rating rules vary by state. Outcomes are not guaranteed. Consult a qualified professional before acting.