Getting a better interest rate can save you a ton of money in the long run, especially if you’re getting a loan with a long amortization or you carry a balance on your credit card for long periods of time. Some people simply accept the interest rate that’s suggested by the lender without putting up any sort of fight. While you don’t want to come to blows with anyone over an interest rate, you certainly don’t want to roll over and accept a higher interest rate than you deserve.