ChatGPT Plus lists at $20 a month, but the actual price you pay can vary from...

https://suprmind.ai/hub/chatgpt/pricing/chatgpt-plus-price/

ChatGPT Plus lists at $20 a month, but the actual price you pay can vary from about $13 to $27. This difference happens because of extra taxes like VAT or GST in your country and fees added by app stores like Apple or Google