The listed price for ChatGPT Plus is $20, but the actual cost you pay often...

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

The listed price for ChatGPT Plus is $20, but the actual cost you pay often varies between $13 and $27. This happens because of things like local taxes (VAT or GST) and extra fees added by app stores like Apple’s or Google’s