ChatGPT Plus is listed at $20, but the actual price can vary between about $13...

https://wool-wiki.win/index.php/How_Much_Does_ChatGPT_Plus_Cost_on_the_US_Web_Checkout_Before_Tax%3F

ChatGPT Plus is listed at $20, but the actual price can vary between about $13 and $27 depending on where you subscribe. This happens because of extra costs like VAT or GST taxes and app store fees from Apple or Google