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

https://telegra.ph/What-is-ChatGPT-Go-for-8-and-Who-Should-Pick-It-Over-Plus-10-11

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