<prompt> Human: My significant other and I are ready to purchase a new car. We both have good credit - his score is in the high 700s and mine is in the low 800s. We both have school loan debt - his around 10,000 and mine around 30,000, but no other debt. We both make good salaries. Ive done some research online and cant see any reason to cosign a loan other than to help someone with no or poor credit. Since that is not our current situation, I was wondering if there would be any benefit in having a cosigner for a car loan? Would it simply reduce our rate? By any significant amount? Is it even worth it? Any insight would be appreciated.  <response>: If youre in the low 800s then youll already get the best rate you can get based on credit score. You can still negotiate a better rate, but youll have to haggle that one out with the dealer. But yes theres no other real benefit if you have the income and a high score already. 