Our answer is NO. Just one time and own forever. Since 16/03/2018, when buying RockPOS, customers just needed to pay once to own RockPOS forever. If you would like to stay up-to-date or run into any problem with RockPOS, we have options to upgrade or support in 12 months/24 months. Read our blog about this change at http://blog.rockpos.com/new-price/.