ChatGPT Plus has a listed price of $20 but the actual cost you pay can vary...

https://wiki-net.win/index.php/What_Do_You_Get_with_ChatGPT_Plus_in_2026%3F

ChatGPT Plus has a listed price of $20 but the actual cost you pay can vary between $13 and $27. This difference comes from taxes like VAT or GST and extra fees added by app stores on iOS and Android