ChatGPT Plus is officially listed at $20 per month, but the actual cost often...

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

ChatGPT Plus is officially listed at $20 per month, but the actual cost often ranges between $13 and $27 depending on where you subscribe. This difference is mainly due to local taxes like VAT or GST and additional fees charged by app stores