Attained age is your age for insurance purposes. Attained Age affects all aspects of your coverage, including eligibility, renewability, and premiums. Your Attained Age will be the same as your actual age beginning on the first day of the month following your birthday. For example, if you turn 42 on October 18th, then your Attained Age for insurance purposes will change from 41 to 42 effective November 1st. Note: When Attained Age changes during a billing period, rates are proportionately blended.