Anniversary rating date in some insurances that are subject to an experience rating, such as workers’ compensation insurance, the date that governs the application of rates and experience modifiers when a previous policy was canceled mid-term. This prevents either the insured or the insurer from canceling the policy mid-term to take advantage of a more favorable rate structure. It can also be used to change ownership or a combination of ownership. As an example of how an annual rating date applies in the event of a policy cancellation, suppose a workers’ compensation policy is written for 1 year from January 1, 2014. It is subsequently canceled and rewritten from July 1, 2014. The new policy will have an annual rating date of 1 January 2015 Rates in effect as of July 14, 2014, when the new policy is issued, are those in effect on January 1, 2014, not those in effect at present. On January 1, 2015, the annual rating date, the policy is approved to apply the rates and modifier effective from January 1, 2015. Then, when the new policy expires on July 1, 2015 and is renewed, the annual date becomes July 1 and remains on that date until some event causes the process to start over.