ChatGPT Plus has a list price of $20, but the actual cost you pay often ranges...

https://suprmind.ai/hub/chatgpt/pricing/chatgpt-plus-price/

ChatGPT Plus has a list price of $20, but the actual cost you pay often ranges from $13 to $27. This difference is mostly due to extra charges like VAT or sales tax, and the app store’s markup when you subscribe on iOS or Android