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

https://www.bookmarkmaster.win/the-listed-price-for-chatgpt-plus-is-20-a-month-but-the-actual-cost-you-pay

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