There is no definitive answer to this question as the length of a permanent ban on TikTok may vary depending on the severity of the offense and the policies of the specific platform. Generally speaking, however, a ban on TikTok that is issued for a serious offense--such as sharing child pornography or promoting terrorism--may be permanent. However, platforms may also choose to issue temporary bans for less serious offenses, such as using the platform to spam or harass other users.