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

https://www.bright-bookmarks.win/chatgpt-plus-is-advertised-at-20-per-month-but-the-actual-price-you-pay-often

ChatGPT Plus has a listed price of $20 per month, but the actual cost you pay can vary from about $13 to $27. This difference comes from factors like local taxes (such as VAT or GST) and extra fees added by app stores on iOS and Android