The listed price for ChatGPT Plus is $20 per month, but the actual charge can...

https://charliekzxa221.huicopper.com/chatgpt-business-pricing-is-it-25-per-seat-annually

The listed price for ChatGPT Plus is $20 per month, but the actual charge can vary between $13 and $27 depending on where you subscribe. This happens because of extra fees like VAT or GST in some countries, or app store markups on iOS and Android