Every year since it’s been in existence, the August SAT date fills up extremely quickly in many areas. It’s important to act quickly to secure a spot (October may fill up quickly as well).

Why does it fill up so quickly?

I assume the reason is the scarcity of testing centers. I suspect schools do not want to open their doors in August, before school officially begins in many areas.

When does registration open up?

The College Board does not tell us, and it’s not an easily predictable date. Last year was the earliest so far, in mid-May.

What can I do to secure my spot?

I recommend frequently checking the registration page, beginning now (at least once per day). Make sure your details are already filled out in your account, so you don’t take too long during registration (and risk losing your spot). You can skip all of the optional questions asking about academic history. Here is the registration page: https://satsuite.collegeboard.org/sat/dates-deadlines

Once...