ChatGPT Plus starts at $20 per month but the final price varies depending on...

https://blast-wiki.win/index.php/What_Should_I_Do_Right_Now_to_Avoid_an_Accidental_$20_Renewal_After_a_Trial%3F

ChatGPT Plus starts at $20 per month but the final price varies depending on your country and device. That’s because local taxes like VAT or GST get added, and if you subscribe through an app store, their fees add a markup