ChatGPT Plus is listed at $20, but the actual price you pay can range from...

https://nova-wiki.win/index.php/When_Should_I_Upgrade_from_Plus_to_Pro%3F

ChatGPT Plus is listed at $20, but the actual price you pay can range from about $13 to $27. This happens because of taxes like VAT or GST, and extra fees from app stores like Apple or Google