Basically every 10M.
Also, your team is placed in a TOC based on the total salary of your final 25 man roster. AAA guys count as their actual salary, not the $200K that is shown. And you get rounded up. So, 80,000,001 gets put in a 90M TOC. Note that the salary cap of the league you are in has NO bearing on what TOC you end up in. I still see even experienced owners get confused on this point.