Developed Premium

Developed premium is the manual premium after it has been adjusted for a specific account's own risk profile. You start with the manual premium — the standard price for your class — and then apply modifiers that reflect how your business differs from the average. The two most common are the experience modifier, which raises or lowers cost based on your prior claims record, and the schedule mod, which credits or debits for characteristics like safety programs, management quality, or premises conditions. The result is a premium that is genuinely tailored to your operation rather than to a generic class.

For a buyer, developed premium is the number that shows whether your loss-control efforts are paying off. An experience modifier below 1.00 means you have outperformed peers and your developed premium sits below manual; a mod above 1.00 does the opposite. Because the modifiers multiply the base, their impact scales with the size of your account — a 15% schedule credit is worth far more on a $50,000 manual premium than on a $5,000 one. This is where two similar businesses in the same class code start to see meaningfully different pricing.

The practical nuance is that developed premium usually is not the final invoice. After the mods are applied, insurers may add expense constants, terrorism (TRIA) charges, state assessments, and other surcharges, and on auditable policies the exposure itself can still change at audit — producing an additional premium or a refund. Treat developed premium as the risk-adjusted core of your cost, then confirm what supplementary charges sit on top before comparing one carrier's offer to another.