Prorated Calculator for Insurance
Free prorated calculator for insurance: full-term premium USD, policy days, days used, linear earned vs unearned premium, optional unearned retention %, daily rate, charts, scenario rows—not a carrier refund guarantee.

Important: Carrier contracts use earned premium, minimum earned, short-rate tables, state rules, and fees that this page does not know. The widget is a plain pro rata illustration plus an optional “keep % of unearned” knob—not insurance advice, not a quote, and not a substitute for your policy PDF and licensed agent.
Summary: Enter the full-term premium, the policy length in days, and how many days have run (or how many days you want to price). The tool shows earned vs unearned premium on a linear day basis, an optional short-style haircut on the unearned bucket, daily rate, and scenario rows—same transparency style as our other planners.
Prorated calculator for insurance (earned / unearned premium)
Core identity: earned = premium × (days used ÷ policy days), unearned = premium − earned. Optional field models a simple fraction of unearned not returned (fees/retention illustration)—not a filed short-rate schedule.
Formulas (short)
- Daily rate = premium ÷ policy days.
- Earned (pro rata by time) = premium × (days used ÷ policy days), capped at premium.
- Unearned = premium − earned.
- Modeled refund = unearned × (1 − retention% ÷ 100), where retention% is your editable “not returned” slice of unearned.