Update site plan - Do I just need to pay the price difference?

If I buy “Basic” site plan today and switch to “CMS” next month. How much do I need to pay? Just the additional 48$ difference or another full year?

It’s simple to purchase a monthly Basic now and switch to the yearly CMS when you’re ready.

As for your question, ask support@Webflow.com because I don’t think that’s automatic.