Yes, the annual plan is billed upfront as mentioned on our Subscribe page, as opposed to being billed per month. 

You will be charged the full annual amount at the start of your subscription, and this charge will recur each year on that date unless you cancel your subscription.

If you will be using SuperSummary regularly, we recommend subscribing to the annual plan, as you will significantly save over the course of a year compared to the monthly plan. However, if you are hoping to access only select guides for just a few weeks, we recommend purchasing a monthly subscription and then canceling before the second month renews.