The short answer
Usually, yes — a 72- or 84-month loan is a risky choice. It lowers your payment but stretches a $35,000 loan at 7% to about $9,461 in interest versus $5,262 over 48 months. Long terms also keep you underwater for years, which is why 29.3% of trade-ins in Q4 2025 carried negative equity.
Why are 72- and 84-month car loans so common now?
Long loans spread fast because new-car prices outran wages, and a longer term is the only way many buyers hit an affordable payment. In Q2 2025, 84-month loans reached 21.5% of new-car financing — an all-time high, up from just 7.3% in 2015. The catch is that a lower payment hides a much higher total cost.
Dealers quote the monthly figure because it sounds manageable, but the term decides how much interest you ultimately pay. The longer the loan, the slower you build equity, and the longer you stay exposed if the car is wrecked or you need to sell. For the vocabulary behind these quotes, see what car financing terms mean.
How much extra interest does a 72- or 84-month loan cost?
A lot. On a $35,000 loan at 7% APR, total interest runs about $5,262 over 48 months but roughly $9,461 over 84 months — about $4,200 more for the same car. Because longer terms also carry higher rates and slower payoff, you spend years paying mostly interest before you dent the principal.
| Term | Monthly payment (≈) | Total interest (≈) |
|---|---|---|
| 48 months | $838 | $5,262 |
| 60 months | $693 | $6,591 |
| 72 months | $597 | $7,975 |
| 84 months | $528 | $9,461 |
The average new-car APR was 6.37% in Q4 2025, per Experian, so most real loans land near these figures. The payment falls by about $310 a month from 48 to 84 months, but you hand the lender roughly $4,200 extra for the privilege.
Why do long loans put you "underwater" on your car?
Because the car loses value faster than a long loan pays it off. A new car drops roughly 20% in its first year, but an 84-month loan barely touches the principal early on, so you owe more than the car is worth for years. In Q4 2025, 29.3% of trade-ins were underwater by an average of $7,214 — an all-time high.
- Drive-off drop: a new car can lose 9–11% the moment it leaves the lot, instantly putting a low-down-payment buyer underwater.
- Slow payoff: early 84-month payments are mostly interest, so equity builds at a crawl.
- Rollover trap: trading in while underwater rolls the gap into the next loan, deepening the hole — see what happens when you trade in a car you still owe on.
When is a longer car loan ever reasonable?
A 72-month term can be defensible if the APR is low, you put at least 20% down, and you plan to keep the car well past payoff. The danger is using the long term to afford a pricier car than your budget supports. If only the 84-month payment fits, the honest fix is a cheaper vehicle, not a longer loan.
- You secured a promotional or low APR, so extra interest is modest.
- Your down payment is large enough to avoid going underwater.
- You intend to keep the car for the full term and beyond, not trade early.
- You could pay extra toward principal when cash allows, shortening the effective term.
What should you do instead of stretching the term?
Shorten the loan and shrink the amount financed. Aim for 48 to 60 months, put at least 20% down, and buy a car whose 60-month payment actually fits your budget. Getting pre-approved first locks in a competitive rate and gives you leverage at the dealer instead of accepting whatever term lowers the payment.
- Set your budget by the price and total interest, not the monthly payment.
- Save toward a down payment of 20% or more before you shop.
- Get pre-approved so you know your real rate — see how to get pre-approved for a car loan.
- Choose the shortest term whose payment you can comfortably cover.
Federal consumer guidance from the CFPB notes that shopping multiple lenders and shortening the term are the two most reliable ways to cut what a car loan costs over its life.
Frequently asked questions
What is the best loan term for a new car?
For most buyers, 48 to 60 months is the sweet spot. It keeps total interest reasonable and helps you stay ahead of depreciation so you build equity. If a 60-month payment is unaffordable, that is usually a sign to buy a cheaper car rather than stretch the term to 72 or 84 months.
How much more interest do I pay on an 84-month car loan?
On a $35,000 loan at 7% APR, a 48-month term costs about $5,262 in total interest while an 84-month term costs about $9,461 — roughly $4,200 more. The longer you stretch the loan, the more of each payment goes to interest instead of principal.
Can a long car loan hurt my credit?
Not directly — paying on time helps your credit regardless of term. The risk is indirect: a long loan keeps you underwater longer, so if you must sell or the car is totaled, you may owe more than it is worth, which can force a missed payment or a costly rollover into a new loan.
Is it better to put more down or get a shorter loan term?
Both reduce interest and negative-equity risk, but they work differently. A larger down payment shrinks the amount financed; a shorter term raises the payment but pays the balance faster. The strongest approach combines a down payment of at least 20% with a term of 60 months or less.
How long are most car finance agreements?
Most car finance agreements run 48, 60, 72, or 84 months, and loans of 61 months or more now make up the majority. As of late 2025 the average new-car loan term was about 69 months and the average used-car term about 68 months — close to six years either way.
Sources
CarsLens is editorial guidance, not individualized advice. This page draws on Experian, CNBC / Edmunds data, and the CFPB.