The advertised ChatGPT Plus price is $20, but the actual cost often varies...

https://www.logo-bookmarks.win/chatgpt-plus-has-a-listed-price-of-20-per-month-but-the-amount-you-actually

The advertised ChatGPT Plus price is $20, but the actual cost often varies between $13 and $27. This happens because of added fees like VAT or GST and extra charges from app stores