ChatGPT Plus lists at $20 a month, but the final price varies by your country...

https://trentonsexcellentthoughtss.evergrovio.com/posts/what-do-you-actually-get-with-chatgpt-plus-besides-more-messages

ChatGPT Plus lists at $20 a month, but the final price varies by your country and device. That’s because of local taxes like VAT or GST, plus extra fees from app stores if you subscribe on mobile