ChatGPT Plus officially costs $20 per month, but the real price you pay often...

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

ChatGPT Plus officially costs $20 per month, but the real price you pay often varies between about $13 and $27. This depends on factors like VAT or GST taxes and extra fees added by app stores, especially on iOS and Android