The listed price for ChatGPT Plus is $20 per month, but the actual cost you pay...

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

The listed price for ChatGPT Plus is $20 per month, but the actual cost you pay can vary from about $13 to $27. This difference comes from extra fees like VAT or GST in your region, plus app store charges when buying on iOS or Android