ChatGPT Plus is advertised at $20 per month, but the actual cost can range from...

https://charlie-wiki.win/index.php/ChatGPT_Plus_File_Upload_Limit_Per_Message:_Is_It_10_Files%3F

ChatGPT Plus is advertised at $20 per month, but the actual cost can range from about $13 to $27 depending on your region. This variation happens because taxes like VAT or GST get added, and app stores on iOS and Android often apply extra fees