The official ChatGPT Plus price is $20 per month, but what you actually pay can...

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

The official ChatGPT Plus price is $20 per month, but what you actually pay can vary from about $13 to $27. This difference happens because of added taxes like VAT or GST and extra fees from app stores like Apple or Google