ChatGPT Plus is listed at $20 a month, but the actual price varies depending on...

https://wiki-canyon.win/index.php/Does_ChatGPT_Plus_Charge_State_Tax_in_the_US_on_Top_of_$20%3F

ChatGPT Plus is listed at $20 a month, but the actual price varies depending on where you live and whether you subscribe via a web browser or an app store. This change reflects added taxes like VAT or GST, plus any extra fees that app stores charge