Subscription dues are just like a magazine subscription. It gives you 365 days of membership in the VFW. The basic breakdown of what happens is:
If you are an annual member and you pay your dues before Jan your expiration will be Jan 2022. If you pay after that date whatever day your dues are processed at National will be the new expiration date. Example would be that you send in your dues to National on 1 Feb 2015 and National processed them on the 15 Feb. Your new expiration date would be 15 Feb 2023.
Annual membership Dues $30 and due on the anniversary of the date you joined the VFW or the date of annual renewal. You will usually get a reminder in the mail.