ChatGPT Plus lists at $20 per month, but the actual cost you pay varies between...

https://wiki-cafe.win/index.php/Does_the_ChatGPT_Mobile_App_Offer_a_7_Day_Plus_Trial%3F

ChatGPT Plus lists at $20 per month, but the actual cost you pay varies between $13 and $27. This happens because taxes like VAT or GST can add to the price. Also, buying through Apple’s or Google’s app stores usually means higher fees