ChatGPT Plus lists at $20 a month, but the final cost depends on where you live...

https://foxtrot-wiki.win/index.php/What_Is_the_ChatGPT_Plus_Reasoning_Limit_and_Why_Doesn%E2%80%99t_OpenAI_Publish_It%3F

ChatGPT Plus lists at $20 a month, but the final cost depends on where you live and how you pay. Taxes like VAT or GST add extra charges based on your country's rules. If you subscribe through an app store, their fees also increase the price