ChatGPT Plus is listed at $20, but the actual price you pay can range from $13...

https://www.third-bookmarks.win/chatgpt-plus-lists-at-20-a-month-but-the-actual-price-you-pay-can-vary-from-1

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