Experience Rating

Experience rating sets a group's premium using its own past claims, projected forward with trend and blended with the carrier's standard (manual) rate based on how credible the group's data is. Larger groups lean more on their own experience; smaller groups lean more on the manual rate.

Also calledexperience-based ratingblended rating
Updated October 16, 20262 min readWatch the 1:14 video

Why it matters at renewal

If your group is experience-rated, your claims directly shape your renewal. Knowing each step of the calculation shows you where to push back.

Worked example

A full renewal build for the same 180-member group as the Medical Trend example, paying $700 PMPM today:

StepValue
Past claims PMPM$600.00
Trended (8%, 18 months)$673.42
Manual rate (claims portion)$650.00
Credibility (180 members, √(180 ÷ 1,000))42.4%
Blended claims (42.4% × $673.42 + 57.6% × $650.00)$659.93
Required premium (÷ 85% target loss ratio)$776.39
Renewal vs. current $700+10.9%

Each row is an assumption you can ask about.

One bad year, about two points. This group's claims ran about 5% higher than its current premium assumed. If they had come in as expected, the same build gives about +8.7%. Counted at full weight, the bad year would push the renewal to +13.2%. At 42.4% credibility, it adds about 2 points.
Read the transcript

If your group is experience-rated, your renewal isn't a guess. It's built from your own claims, in six steps.

Start with past claims: six hundred dollars per member per month, for a group of a hundred and eighty. Trend them eighteen months at eight percent, and you get six seventy-three.

But the carrier doesn't rely on your claims alone. It has its own rate for a group like yours: six fifty. The weight your claims get is called credibility. At a hundred and eighty people, it's about forty-two percent.

Blend the two: six sixty. Divide by the eighty-five percent target loss ratio: seven seventy-six. Against today's seven hundred, that's ten point nine percent.

Here's the part most people miss. This group's claims ran about five percent high. At full weight, that would mean thirteen percent. At forty-two percent, it adds about two points.

So ask your carrier three things. Can we see the full build, step by step? What credibility did you give us? And what rate did you blend with? Find out more at actuariallysound dot com.

Common misunderstandings

01
"One bad year sinks us."
Credibility weighting and large-claim pooling soften the effect of a single year.
02
"Every group is experience-rated."
ACA small groups are community-rated. Mid-size groups are often blended.
03
"Good claims mean a rate decrease."
Trend still applies. Good experience often means a smaller increase, not a cut.

Questions to ask your carrier or broker

  1. Can we see the full renewal build, step by step?
  2. What credibility did you assign us, and how was it calculated?
  3. What manual rate was used for the blend?
Free tool
Is your renewal in line with trend?
Enter the current premium and the proposed increase. Two minutes, no claims data needed.
Check your renewal