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

https://rowansnewwords.tearosediner.net/why-does-chatgpt-plus-cost-more-than-20-for-me

ChatGPT Plus is listed at $20 per month, but the actual price you pay can range from about $13 to $27 depending on where you buy it. This difference comes from factors like local taxes (VAT or GST) and fees added by app stores, like Apple or Google Play