ChatGPT Plus lists at $20 per month, but the actual price you pay can range...

https://www.bookmarking-keys.win/chatgpt-plus-has-a-listed-price-of-20-but-the-actual-cost-you-pay-can-vary

ChatGPT Plus lists at $20 per month, but the actual price you pay can range from about $13 to $27. This depends on factors like sales taxes (VAT or GST) and extra fees charged by app stores