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

https://charliekzxa221.huicopper.com/what-does-chatgpt-plus-mean-by-two-limits-running-at-once

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 subscribe. This happens because of factors like local taxes such as VAT or GST and extra fees added by app stores