Walk into a dealership and one of the first questions you’ll hear is, “What monthly payment are you comfortable with?” It sounds helpful. But focusing on the monthly payment is how a lot of people end up in six- or seven-year car loans that cost far more than they expected.
Longer loans are now common
As car prices have risen, 72-month and even 84-month loans have become routine. They make expensive cars look affordable month to month. The catch shows up in two places: total interest, and negative equity.
The math on a $35,000 loan
Here’s roughly how a $35,000 loan compares at different terms. Longer loans often come with higher rates, so we’ve bumped the rate as the term grows:
- 48 months at 6.5%: about $830/month, about $4,800 total interest
- 60 months at 6.75%: about $690/month, about $6,300 total interest
- 72 months at 7.25%: about $600/month, about $8,200 total interest
- 84 months at 7.75%: about $540/month, about $10,500 total interest
Stretching from 48 to 84 months cuts the payment by roughly $290, but more than doubles the interest.
The bigger risk: being upside down
New cars lose value fastest in the first few years. With a long loan and a small down payment, you can owe more than the car is worth for years. That’s called negative equity, or being “upside down.”
Why it matters: if the car is totaled or stolen, insurance pays its market value, not your loan balance. You’d owe the difference. And if you want to trade in early, the leftover balance often gets rolled into your next loan, making the problem bigger. Gap insurance can cover the shortfall after a total loss, but it doesn’t fix the underlying issue.
A practical guideline
A popular rule of thumb is 20/4/10: put at least 20% down, finance for no more than four years, and keep total car costs (payment, insurance, gas) under 10% of gross income. Not everyone can hit all three, but it’s a useful target. If the only way a car fits your budget is an 84-month loan, the car is probably too expensive.
How to get a better deal
- Get preapproved before you shop. A credit union or bank preapproval gives you a rate to beat. See credit union vs. bank.
- Negotiate the price, not the payment. Settle the out-the-door price first, then talk financing.
- Compare by APR and total cost. See APR vs. interest rate.
- Rate-shop within about two weeks so multiple auto loan inquiries count as one — more in hard vs. soft inquiries.
- Watch for add-ons like extended warranties and paint protection rolled into the loan.
- Consider a reliable used car, which has already taken its biggest depreciation hit.
Already in a long loan?
- Make extra principal payments when you can.
- Refinance if your credit has improved or rates have dropped.
- Plan to keep the car well beyond the payoff date to get value from it.
The CFPB’s auto loan resources include a car-buying checklist and explain dealer financing in detail. Also budget for insurance before you buy — our guide to car insurance deductibles can help keep premiums in check.
Bottom line
Shorter loans cost less and protect you from owing more than the car is worth. Aim for 60 months or less, put money down, and shop for financing before you shop for the car. A slightly higher payment for a shorter time almost always beats a small payment that lasts seven years.
