ChatGPT Plus is listed at $20 a month, but the actual price you pay often...

https://highstylife.com/i-keep-hitting-chatgpt-limits-should-i-start-a-new-thread/

ChatGPT Plus is listed at $20 a month, but the actual price you pay often ranges from $13 to $27. This difference comes from extra taxes like VAT or GST and fees added by app stores such as Apple’s or Google’s