ChatGPT Plus is listed at $20, but the actual price you pay can vary from about...

https://telegra.ph/ChatGPT-Plus-File-Upload-Failed-Is-It-the-20MB-Image-Limit-08-05

ChatGPT Plus is listed at $20, but the actual price you pay can vary from about $13 to $27. This difference comes from factors like taxes (VAT or GST) and the fees that app stores add on top