HOW DID YOU GET THAT INTEREST RATE?????????????????????????????
In my case, what significantly helped, is not living in the US ;)
Here's some intel on getting a low-low rate within the US:
Recently re-re-financed my student loans. Originally went from Federal 6.8-7.9% loans to SoFi, for a variable rate that sat at about 3.5% (a solid improvement). Currently however I'm refinancing again with First Republic Bank. Their pitch is that they are not looking to make a lot of income from refinancing student loans, but that they hope to start a banking relationship so that presumably when I'm ready to borrow money for houses and cars, they'll earn their profit there (not likely).
Therefore, while SoFi and most other student loan companies refinance your loans based on your individual risk profile (weighing credit score, income, job field, etc.) and offer you an personalized interest rate, First Republic refinances everyone at a set variable/fixed rate so long as you qualify. For the 5 year payment plan, this was either 1.85% variable or 1.95% fixed. So far as I know, it's only available in their market areas (NYC and SF areas) and only for higher income grad loans like law school, medical school, and dental school.
What's more -- if you pay off the loan in less than 4 years (48 months), they will rebate actual interest you paid up to 2% of the initial borrowing. In my case, this works out to about $1,700 in rebate. If I take 4 full years to pay off the loan, I would pay around $4k in interest, minus $1700, for a total of about $2300. Factoring in the rebate, this works out to about a 1% interest rate.
However, if I go turbo mode on this loan and pay it off in 2 years, the actual interest paid and the rebate would be about the same, meaning it's essentially a zero percent loan.
I struggle with whether it's worth going turbo on the loan for 2 years to pay zero interest, or whether paying it over 4 years at effectively a 1% interest rate and investing the remainder would be the better option. I believe the math works out to go 4 years and invest the difference, as there's very little risk here given that it's a fixed rate and I could easily earn more than 1% for the 2 years difference. The net gain probably isn't that great, however, and there's a major psychological benefit of NOT having to pay loans that would be very nice to have.