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

https://record-wiki.win/index.php/ChatGPT_Plus_Price_in_the_Eurozone:_Why_Is_It_%E2%82%AC23%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