ChatGPT Plus lists at $20 per month but the final price changes depending on...

https://eduardosnicechat.publishlane.com/posts/does-chatgpt-plus-auto-renew-after-a-trial-or-promo

ChatGPT Plus lists at $20 per month but the final price changes depending on your country and device. Taxes like VAT or GST add to the cost, and app stores also charge a fee that can raise the price on iOS or Android