ChatGPT Plus has a base price of $20 a month but the final cost changes...

https://xeon-wiki.win/index.php/ChatGPT_Plus_vs_Pro:_Is_Pro_Just_More_Capacity_for_$100_or_$200%3F

ChatGPT Plus has a base price of $20 a month but the final cost changes depending on your country and device. That’s because taxes like VAT or GST get added based on where you live