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Is there any reason not to put a 35% down payment on a car?
If you are going to finance a used car, it is frequently best to arrange financing before you even pick out the car.    The easiest way I recommend is to talk to a local credit union or two.   They'll be able to tell you your interest rate and terms without having to talk to the dealer at all.  Most likely, they'll be significantly better than the dealer at getting a good interest rate. As far "what is a good rate?", check out bankrate for average loan rates: http://www.bankrate.com/auto.aspx Today's numbers look like 2.87% is the average for a 48-month used car loan.   That means if the bank comes back with something ridiculous like 9% or 10% you know they are way overcharging you.   I know someone who got a first-time-buyer rate from Ford and ended up with a 19.99% rate.   I could literally buy the car on my credit card and end up in a better spot. Honestly though, if you are 18 and have $5500 to put towards a car, I'd buy a $4500 car and save $1000 for repairs and maintenance.   After you have the car, put $250 every month for a "car payment" into a savings account for your next car.