<p>If you’re diligent about your studying, you’ll probably only need 5-7 days max for each subject test (that is, if you already know most of the material). That way you can focus more on the SAT and potentially prepare months in advance.</p>
<p>You should take most subject tests shortly after you have completed that subject in school. The exception is math. Since all the strategies you learn while preparing for the SAT can be used on the math subject tests, you should take these right after you have taken your SAT - about 1 month of preparation after having already prepared for the SAT is usually more than enough.</p>