ChatGPT Plus is listed at $20, but what you actually pay can vary between $13...

https://wiki-spirit.win/index.php/What_Happened_to_the_ChatGPT_Plus_Student_Deal_from_March_31,_2025%3F

ChatGPT Plus is listed at $20, but what you actually pay can vary between $13 and $27 depending on where you buy it. The difference comes from extra fees like VAT or app store charges on iOS and Android