Cancellation (insurance)

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Cancellation of an insurance policy before the end of the policy period has the effect of ending the insurance coverage on the date of the cancellation. This can result in a partial return premium which can be calculated in different ways depending on the method specified in the policy.

There are three typical calculation methods: pro-rate, or using a penalty method such as short period rate (old short rate), and short period rate (90% pro rata). The return premium is generally calculated using a wheel calculator, a type of circular slide rule or an online version.^[1] The return premium is calculated by calculating the unearned premium and then subtracting any unpaid premium and penalty for early cancellation.