ChatGPT Plus lists for $20, but actual prices vary from around $13 to $27...

https://wiki-cafe.win/index.php/Why_Did_OpenAI_Keep_ChatGPT_Plus_at_$20_Since_February_2023%3F

ChatGPT Plus lists for $20, but actual prices vary from around $13 to $27 depending on your location. This happens because taxes like VAT or GST get added, and app stores on iOS and Android often charge extra fees