Why an Old Claim Still Hurts Your Workers' Comp EMR

Updated September 12, 2026

You closed the claim. Or you think you did. Your safety record has been clean for two years. And your mod hasn’t moved. Somewhere on the worksheet is a claim you thought was behind you, still counting against you.

Your worksheet always covers three years at once

Your workers’ comp EMR (experience modification rate), covered fully in what an EMR is, is built from three policy years at a time, not one. A claim that happened in 2024 sits on your 2026 rating, your 2027 rating, and your 2028 rating. Three separate annual mods, all touched by the same claim. That’s not a mistake in the system. It’s how the window is built.

This means a single bad year doesn’t cost you one bad mod. It costs you three, one after another, even if nothing else changes and no new claims happen. If you’re wondering why your mod is still elevated two years after you thought the problem was fixed, this is usually why. The claim hasn’t left the window yet.

The claim drops off on its own schedule, not yours

A claim falls out of your rating the year it ages out of the three-year window, not the year it closes. Closing a claim stops it from getting worse. It doesn’t remove it from the calculation early. If a claim from policy year 2024 is in your 2026, 2027, and 2028 mods, it’s gone from your 2029 mod regardless of when in that stretch it actually closed.

This catches contractors off guard because it runs against the instinct that fixing something should show up right away. Fixing the underlying problem, whatever caused the claim, is worth doing for its own sake. But the calendar for when it leaves your mod is fixed by the rating window, not by how quickly you handled it.

While a claim is open, the reserve is the number that counts

Here’s the part that surprises people most. A claim’s value in your mod isn’t what’s been paid out so far. It’s the reserve, the carrier’s current estimate of what the claim will ultimately cost, medical and indemnity combined, paid and unpaid.

If a claim reserve is set at $80,000 and only $30,000 has actually been paid, your mod is built using $80,000. If that reserve should really be $40,000, because the claim turned out to be less serious than first estimated, or the worker returned to work sooner than expected, and nobody asked the carrier to update it, you’re carrying an extra $40,000 in your rating for as long as the claim stays open at that number.

This is why an open claim deserves more attention than a closed one, not less. A closed claim’s cost is settled. An open claim’s cost, as far as your mod is concerned, is whatever the carrier’s file currently says it is, and that number can be wrong in either direction until someone checks it against how the claim is actually progressing.

A concrete timeline

Say a claim happens in policy year 2024. It’s in your 2026 mod, your 2027 mod, and your 2028 mod. That’s true whether the claim closes in January 2025 or stays open through 2027. Closing it early stops the reserve from drifting upward and stops new costs from being added, which matters. It does not pull the claim out of the 2027 or 2028 rating early. The claim leaves on schedule, in your 2029 mod, when the window finally rolls past 2024 entirely.

If that same claim sits open with an inflated reserve all the way through 2027, it’s not just costing you once. It’s costing you in three separate annual ratings, each one calculated as if the claim were still worth its stale reserved value. Fixing the reserve in year one instead of year three doesn’t just help one rating. It helps whichever of the three ratings haven’t been calculated yet at the time you fix it.

What to actually look at

Pull your loss runs (the carrier’s list of your claims and their current values) and look at every claim still marked open. Ask three things about each one. Is the reserve current, or is it a number that was set early and never revisited. Is the claim actually still active, or has it been effectively resolved without the file being updated. And is there a cap or reduction, in states where one applies, that should have brought the reserved value down and hasn’t been reflected.

None of this happens automatically. The bureau calculates your mod from what the carrier’s system says. The carrier’s system says whatever was last entered. If nobody’s gone back to update a reserve on a claim that’s quietly resolved itself, that stale number rides through every mod calculated while the claim window includes it, which, as covered above, can be three years running.

What to send your carrier

The one-line request that gets this moving is simple: ask your agent or carrier to confirm the current reserve on each open claim and whether it reflects the claim’s actual current status. That’s a request they can act on directly, and it’s the kind of question that, asked plainly, tends to get a real answer rather than a form letter.

If you want a full pass through every open claim, every reserve, and every reduction or cap that should apply, that’s what a full worksheet verification does, comparing your worksheet against your loss runs line by line. It’s a flat fee, no contingency, and the savings are yours. Start with the free EMR Cost & Bid Check calculator, or get on the waitlist for the full check.