ChatGPT Plus lists for $20, but the actual price often ranges from $13 to $27....

https://domgodwinson38.gumroad.com/p/why-do-reviews-only-mention-the-160-messages-cap-and-not-the-reasoning-cap

ChatGPT Plus lists for $20, but the actual price often ranges from $13 to $27. This difference comes from factors like taxes (VAT or GST) and fees added by app stores on iOS and Android