The listed price for ChatGPT Plus is $20 per month, but the actual cost you pay...

https://victor-wiki.win/index.php/ChatGPT_Business_Pricing:_Is_It_$25_Per_Seat_Annually%3F

The listed price for ChatGPT Plus is $20 per month, but the actual cost you pay can vary from about $13 to $27. This difference comes from extra fees like VAT or GST in your region, plus app store charges when buying on iOS or Android