ChatGPT Plus has a listed price of $20, but the actual cost you pay can vary...

https://riversinterestingthoughtss.wpsuo.com/what-is-the-real-chatgpt-plus-price-range-13-to-27

ChatGPT Plus has a listed price of $20, but the actual cost you pay can vary from about $13 to $27. This difference happens because of taxes like VAT or GST and extra fees added by app stores on iOS and Android