All the while, over the course of paying off the loan you are missing on adding this $3k/mo of principal to your investment to take advantage of the miracle of compound interest.
Choosing the 25 year repayment plan offers the lowest monthly payments after residency. So its probably not correct to say that I would be "missing out" on the miracle of compound interest. In fact it is quite the opposite.
Let's say that I am an individual with $180,000 in federal loans. The difference in the monthly payment for 25yr vs 10yr repayment plan is about $1,000. Let's use a classic compounding scenario to see what I should do:
Attending #1 invests $1,000/year starting at the age of 30 for 10 years, so he only invests $10,000.
Attending #2 invests $1,000/year, but doesn't start until the age of 40. He invests for 30 years for a total of $30,000.
Who has saved more for retirement at the age of 70?
Attending #1 only invested $10,000, but because he started investing right out of residency his nest egg has grown to $278,000
Attending #2 payed off all his loans the first 10 years, he did not have an extra $1,000/month to devote towards retirement. Instead he invested an EXTRA $20,000 to try to catch up, but at 70, he only has $164,494 saved for retirement.
You may be asking, how much more does it cost to choose the 25 year repayment plan over the 10 year. Given my debt, I would have to pay an extra $160,000 in interest over 25 years. Remember Attending #1 made $278,000 by investing his extra $1,000/month right out of residency. So the 25 year repayment plan actually produced a net profit of $118,000.
I love my financial aid office, but they have blinders on. They only see that extra $160,000 in interest over 25 years, so they always suggest to pay off loans as fast as possible, but they aren't looking at the entire financial portfolio. By having a lower monthly payment as an attending, we can invest more earlier, and really reap the benefits ($118,000!) of compounding interest.
I know Gute is a little skeptical of financial planners, and I appreciate his/her concern for my best interest. But I have run these numbers and multiple additional scenarios with 3 financial planners and they all agree. The 25 year repayment plan is usually the best option (given that I won't qualify for PSLF). It helps that 1 adviser is my best friend, and the other is my Dad, so I think they have my best interest in mind.
As always, this scenario is particular to me, and I would recommend that every one finds a trustworthy financial adviser to find the best plan for you.