The payment is one-time. After you pay the one-time price of the theme, you will never be charged for it. But you can buy extended support after your support expires after 6 months.
Aut mauris ultricies error! Consequuntur eveniet impedit lacus cupidatat harum nobis minim ad beatae hendrerit explicabo, soluta, atque? Hic condimentum itaque id torquent