How many times should I take the SAT?
If you get the score you need, once is enough. Okay, that's a cop-out. There isn't an inherent advantage in taking the test a lot of times unless you underperformed on it, and you should know whether you underperformed because you should have already taken some official practice tests. If you've been scoring an 1150 on practice tests and you score about an 1150 on test day, you shouldn't expect to do better just by taking it again. Instead, you'll need to do some prep and actually get better at the SAT in order for your score to go up. If, however, you have been getting an 1150 on practice tests but scored just a 1040 on the real thing, take it again whether you do additional prep or not.