ChatGPT Plus starts at $20 per month, but the final price you pay can vary by...

https://chloesbrilliantjournal.capitaljays.com/posts/what-should-i-do-right-now-to-avoid-an-accidental-20-renewal-after-a-trial

ChatGPT Plus starts at $20 per month, but the final price you pay can vary by country and device. This happens because taxes like VAT or GST are added on top. If you subscribe through an app store, they add their own fees too