Government subsidized and unsubsidized loans are different from each other. The federal government pays the interest on subsidized loans during periods of authorized deferment. Bank loans are loans made by a lender. Private loans you pay while you're in school and federal loans you pay once you graduate, and the government pays while you are still in college. The government interest for loans for undergrads are 4.66% and the the interest for private loans are 6.39% (Wells Fargo). To calculate how much you would pay over time, we used the equation A=P(1+r)^t. So if we took out a $20,000 loan ($5,000 each year of college), we would use the equation A=20,000(1+0.0466)^15 (we got the 0.0466 from the interest rate of the government loan and the 15 from an estimated amount of years) and it came out to be $220 a month. We did it again for 20 years and got $207 a month, and again for 10 years and got $262 a month. Now what happens when you borrow $100,000? well the equation would be 100,000(1+0.0466)^20. This comes out to be $1,036 a month. That's crazy! I'm definitely going to be looking more into these things as I get closer to applying for colleges.