ChatGPT Plus has a listed price of $20 per month, but the actual amount you pay...

https://astro-wiki.win/index.php/ChatGPT_Plus_Price_in_Croatia:_Is_It_Close_to_$27%3F

ChatGPT Plus has a listed price of $20 per month, but the actual amount you pay can range from about $13 to $27. This variation happens because of things like taxes (VAT or GST) and extra fees added by app stores such as Apple’s or Google’s