Experience Rating Mod Calculator

Calculate workers' compensation experience modification factor based on actual vs expected losses.

Actual Losses

Expected Losses

Ballast Value

Primary Loss Weight

Excess Loss Weight

Tab to move between fields

Experience Mod

0.91

Premium Impact

-9%

Primary Actual Losses$240,000

Excess Actual Losses$560,000

Mod Deviation (%)-9%

How to Use This Calculator

Enter the insured's historical premium and losses for each experience year.
Set the credibility weight based on premium volume.
Input the expected loss ratio from industry or manual rates.
Review the experience modification factor and resulting modified premium.
Experience rating rewards low-loss insureds with credits and surcharges high-loss insureds.

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