ChatGPT Plus lists at $20, but actual prices often vary between $13 and $27...

https://www.bookmarkpage.win/the-listed-price-for-chatgpt-plus-is-20-per-month-but-the-actual-cost-you-pay

ChatGPT Plus lists at $20, but actual prices often vary between $13 and $27 depending on where you subscribe. Differences come from taxes like VAT or GST and app store fees added on Apple or Google platforms