~6.75% or so I think.  It can't be zero or no one would ever pay them off.  But it should track closer to federal interest rates and you should be able to write off the entirety from your taxes.

congrats on paying off your loans 

how high or low was your interest rate?

maybe a good compromise is to offer almost zero interest rate loans or variable that is tied to inflation


Bell_curve

As someone who has paid off >300k in loans I have empathy for so many of these students.  So many were fed lies as teenagers about the returns of college and are stuck in dead end careers with insurmountable loan payments and a balance that won't go down.  A lot of the stories on /r/studentloans are depressing and many are suicidal.