ChatGPT Plus lists at $20 a month, but the actual price you pay can vary from...

https://mighty-wiki.win/index.php/Is_There_a_ChatGPT_Plus_Free_Trial_I_Can_Click_to_Start%3F

ChatGPT Plus lists at $20 a month, but the actual price you pay can vary from about $13 to $27. This difference happens because of extra taxes like VAT or GST in your country and fees added by app stores like Apple or Google