ChatGPT Plus has a $20 list price, but what you pay can vary from about $13 to...

https://suprmind.ai/hub/chatgpt/pricing/chatgpt-plus-price/

ChatGPT Plus has a $20 list price, but what you pay can vary from about $13 to $27 depending on where you buy it. This happens because of taxes like VAT or GST and extra app store fees on iOS or Android