ChatGPT Plus is listed at $20, but the actual price you pay can vary from about...

https://juliet-wiki.win/index.php/ChatGPT_Plus_Pricing_Changes_Timeline_2023_to_2026

ChatGPT Plus is listed at $20, but the actual price you pay can vary from about $13 to $27. This depends on things like VAT or GST taxes in your country or extra fees added by app stores on iOS and Android