The listed ChatGPT Plus price is $20, but real costs vary from $13 to $27...

https://www.romeo-bookmarks.win/chatgpt-plus-is-listed-at-20-monthly-but-the-actual-price-you-pay-can-vary

The listed ChatGPT Plus price is $20, but real costs vary from $13 to $27 depending on where you buy it. Differences come from taxes like VAT or GST and extra fees charged by app stores