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

https://www.bookmarkingtraffic.win/chatgpt-plus-lists-at-20-per-month-but-the-actual-cost-you-pay-varies-between

ChatGPT Plus is listed at $20 per month, but the actual price you pay can range from about $13 to $27 depending on where you subscribe. This difference is mainly due to taxes like VAT or GST and fees added by app stores on iOS or Android