How much is USDT transfer fee?

Excuse me, I have a question about the transfer fee for USDT. Could you please tell me how much is the fee for transferring USDT? I'm interested in understanding the cost involved in this transaction and whether it varies based on the amount being transferred or any other factors. I'm also curious about whether there are any ways to reduce the transfer fee, perhaps through certain promotions or loyalty programs. Thank you for your assistance in clarifying this matter.