An anniversary year is a benefit period that runs from the anniversary of your policy's effective date to the same date the following year. For example, if your policy effective date is April 15, your benefit year runs from April 15 to April 14 of the following year. All deductibles, annual maximums, and benefit limits reset at the start of each anniversary year. Many individual health insurance plans in Canada use anniversary-year benefit periods rather than calendar-year periods. This means that when your benefits reset depends on when you first enrolled, not on the calendar. When comparing plans or switching insurers, pay attention to which benefit period each plan uses to avoid confusion about when your limits reset.