ChatGPT Plus is listed at $20, but the actual cost you pay can range from about...

https://oscar-wiki.win/index.php/ChatGPT_Go_vs_Plus:_Is_the_$12_Difference_Worth_It%3F

ChatGPT Plus is listed at $20, but the actual cost you pay can range from about $13 to $27. This variation comes from factors like VAT or GST taxes and extra fees charged by app stores such as Apple’s or Google’s