ChatGPT Plus starts at $20 a month but the final price varies by country and...

https://zandersexcellentblog.quillnesty.com/posts/how-many-files-can-i-keep-in-a-chatgpt-project-comparing-chatgpt-free-and-plus-limits

ChatGPT Plus starts at $20 a month but the final price varies by country and device. That’s because added taxes like VAT or GST apply depending on where you live. Buying through an app store may add a markup on top of the list price