<prompt> Human: To give a little background, I graduated college with around 75K in student loan debt in 2009. Ive got it down to about 58K a few years out and plan to continue to pay it down as aggressively as I can. I put as much of my year-end performance bonus as I can towards the balance, as well as any tax return amounts. I have a well paying job in an industry that has high demand for people at my level Senior at a global assurance, tax advisory firm. As of now I have a little over 10K in my checking accountcash. I was looking to apply around 4K of my available cash towards debt in a couple of months trying to build up that 10K balance a bit more before I do it. The thing is, I have approx. 4K left on my car loan year is 2007 that I pay 155month on. I didnt want to finance a car out of college, but I had no choice do to the amount of driving I do for my job. My 58K student loan balance is comprised of many loans both federal and private ranging from 200 to 14,000 and varying interest rates 3.12 to 7.75. Thankfully, my largest loan has one of the lower rates, at 3.25. Ive done the math and no matter which specific student loans I target to pay off, my auto loan obviously gets me the most bang for my buck in terms of monthly cash flows that would free up if I were to pay it off; versus paying down a combination of outstanding student loans. Im well aware this has to do with a combination of interest rates and my terms 5 year auto loan vs. extended student loans and over the life of the student loans Im going to be paying a lot more than I would my car loan. But I figure freeing up that 155month allows me more money in the near term to apply towards the student loan debt. This coupled with the fact that in my current profession I can expect, at the least, 6-7 raises a year, and a 100K salary by the time Im 30, that will allow me to pay even greater attention to eliminating my student loan debt, lead me to believe that paying off the car loan now and using its immediate cash flow savings is the right move, rather than applying it to a bucket of my current student loans that have higher interest rates than my car loan. Id appreciate PFs thoughts.  <response>: Pay down the loan with the highest interest rate with the money you have left over after the minimum payments on the others. 