Is a 72-Month Car Loan a Bad Idea?
A longer loan makes almost any car look affordable, because it spreads the same balance over more payments. That is exactly why dealers offer it. The monthly number goes down, but the total you pay goes up, and so does the time you spend owing more than the car is worth. This guide uses one example car so you can see each effect clearly, then shows how to test your own deal.
One car, four loan terms
These figures are calculated for a $35,000 loan at 7.5% APR with no down payment. They are an example, not a quote. Your rate will depend on your credit, the lender and the car.
| Term | Monthly payment | Total interest | Total paid |
|---|---|---|---|
| 48 months | $846 | $5,621 | $40,621 |
| 60 months | $701 | $7,080 | $42,080 |
| 72 months | $605 | $8,571 | $43,571 |
| 84 months | $537 | $10,095 | $45,095 |
Going from 48 to 72 months saves about $241 a month but costs about $2,950 more in interest. Going all the way to 84 months costs about $4,474 more than the 48-month loan, for exactly the same car. The monthly saving gets smaller with each step while the extra interest keeps growing, so the longest terms give you the least benefit for the most cost.
The underwater problem
Cars lose value fastest in the first couple of years, while early loan payments go mostly to interest. Being "underwater" means you owe more than the car is worth. Here is how fast the balance falls on the same $35,000 loan at 7.5%:
| After | Balance, 48-month loan | Balance, 72-month loan |
|---|---|---|
| 12 months | $27,206 | $30,200 |
| 24 months | $18,806 | $25,028 |
| 36 months | $9,754 | $19,454 |
After two years, the 72-month borrower still owes about $6,200 more than the 48-month borrower. If the car lost around a third of its value in that time (an illustration, since depreciation varies a lot by model), it would be worth roughly $23,000, which is less than the $25,028 owed. That gap matters if the car is totaled, because insurance pays market value, not your loan balance. It also matters if you want to trade in early, since the shortfall gets rolled into the next loan.
How your interest rate changes the answer
A longer term hurts more when the rate is high. Same $35,000 loan over 72 months:
| APR | Monthly payment | Total interest |
|---|---|---|
| 5% | $564 | $5,584 |
| 7.5% | $605 | $8,571 |
| 9% | $631 | $10,424 |
| 12% | $684 | $14,266 |
At 12%, a 72-month loan costs more than $14,000 in interest, which is about 40% of the car's price. A 72-month loan at 5% costs about the same as a 48-month loan at 7.5%. If you have a choice, a shorter term and a lower rate are both worth shopping for, and getting pre-approved from a bank or credit union before you visit a dealer gives you a rate to compare. Our guide to a good car loan interest rate covers typical ranges.
What a down payment does
Putting 20% down ($7,000) leaves $28,000 to finance at the same 7.5%:
- 48 months: $677 a month and about $4,496 in interest.
- 72 months: $484 a month and about $6,857 in interest.
The larger down payment makes the 72-month payment lower than the no-down 84-month payment of $537, and it cuts the balance you owe after two years from about $25,000 to about $20,000. A bigger down payment is the simplest way to reduce both the interest and the underwater risk.
If you do take a 72-month loan, you can still pay it off faster
A long term with no prepayment penalty gives you flexibility. If you pay the 48-month amount ($846) on the 72-month loan, it pays off in about 49 months with about $5,621 in interest, which is almost the same as the 48-month loan. Adding just $100 a month to the 72-month payment finishes it in about 60 months and saves roughly $1,500 in interest. You get the lower required payment as protection if money gets tight, and you only pay the extra when you can. Confirm that extra payments go to principal and that there is no early payoff fee.
A quick test before you accept a long term
Ask what the payment would be at 48 months. If you can not afford that, the longer term is not making the car affordable, it is only hiding that the price is above your budget. In that case the better moves are a cheaper car, a bigger down payment, or a used car that has already taken its biggest depreciation hit. Our guide on how much to spend on a car walks through a full monthly budget including insurance, fuel and maintenance.
Common mistakes with long car loans
- Shopping by monthly payment only. Ask for the total price, the rate and the term, and compare those.
- Rolling old debt into the new loan. Negative equity from a trade-in adds to the new balance and starts you underwater on day one.
- Skipping gap coverage on a small down payment. If the car is totaled while you are underwater, gap coverage can pay the difference. Prices vary, so compare quotes.
- Assuming you can refinance later. You may be able to, but a lower rate is not guaranteed and being underwater can make it harder.
When a longer loan can still be reasonable
A 72-month loan is less risky with a low interest rate, a down payment of 20% or more, and a car you plan to keep for 8 to 10 years. It can also work when you plan to make extra payments, as described above. It is a poor fit when the long term is the only way to make the payment fit, when you plan to trade the car in within a few years, or when the rate is high.
Sources and further reading
For independent, authoritative information on this topic, these are good places to start:
- Consumer Financial Protection Bureau: Before you finalize a car loan — what to check in the paperwork before you sign.
- Consumer Financial Protection Bureau: Amortization and your auto loan — why longer loans build equity more slowly.
- Federal Reserve: Consumer Credit (G.19) — official data on average credit card and auto loan interest rates.
This article is general information, not financial advice. Example figures are calculated, not quotes, and your actual rate and payment will differ.