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

https://www.bookmarkingqueen.win/chatgpt-plus-is-officially-listed-at-20-per-month-but-the-actual-cost-often

ChatGPT Plus is listed at $20 per month, but the actual price you pay can range between $13 and $27 depending on your location and platform. This difference is mainly due to taxes like VAT or GST and app store fees added on top