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

https://www.bookmarkingqueen.win/the-listed-20-price-for-chatgpt-plus-often-varies-between-13-and-27

ChatGPT Plus is listed at $20 per month, but the actual price you pay can vary between $13 and $27 depending on your location and payment method. This happens because taxes like VAT or GST and app store fees get added on top