ChatGPT Plus lists for $20 a month, but the final cost varies by country and...

https://felixssuperperspective.brightsora.com/posts/is-there-a-chatgpt-plus-free-trial-button-on-chatgpt.com

ChatGPT Plus lists for $20 a month, but the final cost varies by country and device. That’s because taxes like VAT and GST get added depending on your location. If you subscribe through an app store, expect a higher price due to their commission markup