ChatGPT Plus is advertised at $20 per month, but the actual cost can range from...

https://wiki-view.win/index.php/Why_Did_OpenAI_Keep_ChatGPT_Plus_at_$20_Since_February_2023%3F

ChatGPT Plus is advertised at $20 per month, but the actual cost can range from about $13 to $27 depending on your region. This variation happens because taxes like VAT or GST get added, and app stores on iOS and Android often apply extra fees