Typically, you should pay off your student loans with the highest interest rate first. Since these gather interest more quickly, you"ll end up saving more money in the long run by paying them back first. You should be able to check the terms of each of your loans to find out what the interest rates are. \r However, if you are overdue on payments for any of your loans, you should absolutely be paying those back first, regardless of interest rates. Failing to make your minimum monthly payments leads to penalties, can hurt your credit score, and have many other consequences in the future.