SAT Reasoning Test
You will get a short break at the end of each hour of testing time. You must work within each section of the SAT only for the time allotted. You are not permitted to go back to a section once that section has ended. Nor are you permitted to start the next section if you finish a section early.

The testing supervisor will guide you through the testing process and provide all the necessary instructions.

SAT Subject Tests
Each Subject Test is about one hour long. If you are only taking one or two Subject Tests, you may leave the test center after your final test is finished.

You may work on only one test during each testing hour. You will get a short break at the end of each hour of testing time. You can take up to three Subject Tests on one test date.

You can change your mind on test day about which Subject Test you want to take. You may substitute a Subject Test (other than a listening test), or add Subject Tests (other than a listening test) on test day.

The testing supervisor will guide you through the testing process and provide all the necessary instructions.

Standby Testing
If you miss the late registration deadline, there's still a chance you can sometimes take the SAT as a standby. Test centers accept standbys on a first-come, first-serve basis only if they have enough space, testing materials, and staff-so there is no guarantee that you'll be admitted to the test.