ChatGPT Plus is listed at $20 per month, but the actual price you pay often...

https://atomic-wiki.win/index.php/Does_ChatGPT_Plus_Have_an_Annual_Plan_in_2026%3F

ChatGPT Plus is listed at $20 per month, but the actual price you pay often varies between $13 and $27. Differences come from taxes like VAT or GST and app store fees on iOS and Android