<p>I believe for the essay on the SAT, it might be better to just focus on the content than the handwriting. I took the SAT and scored an 11 on the essay with the worst handwriting you’d ever see. I was extremely surprised when I saw my digital copy as I could barely read it haha
So no your handwriting will not effect your essay score. Focus on writing the essay with the time given as it will go by in a flash</p>