Most people who are late on a car payment worry about the wrong thing. The interest is trivial and the late fee is annoying but small. The expensive part is a single date on the calendar: the day the payment becomes 30 days past due.
Quick answer: On a typical $520 payment, being 5 days late costs about 40 cents in extra interest and usually no fee. At 15 days, past most grace periods, add a late fee of $25 to $50 (or 3% to 5% of the payment). At 30 days, the lender can report the payment as late to the credit bureaus. In FICO's own example, that dropped a 793 score to the 710–730 range. Take a $25,000 to $30,000 car loan while the mark is fresh and the higher rate can cost $1,100 to $2,100. If you can't pay in full, everything you do should aim at staying under 30 days.
| Days late | What usually happens | Cost on a $520 payment |
|---|---|---|
| 1–10 | Inside most grace periods. Interest keeps running; no fee; not reported | About $0.40–$0.85 in interest |
| 11–29 | Grace period over, late fee charged. Calls and emails from the lender. Still not reported to credit bureaus | $26–$30 fee + about $1–$2 in interest |
| 30–59 | Can be reported as 30 days late. The next payment is now due too | Fees + an estimated $1,100–$2,100 on your next loan |
| 60–89 | Reported as 60 days late. Default notices; some lenders start repossession steps | A larger score drop; repossession risk |
| 90+ | Many lenders treat the loan as in default | Repossession, towing and storage fees, a possible deficiency balance |
Grace periods are set by your contract, not by law. Ten to fifteen days is common, and some contracts have none. Your payment is technically late the day after the due date even inside a grace period; the grace period only decides when the fee kicks in.
Almost all US auto loans charge simple interest by the day. When you pay late, the interest owed since your last payment keeps growing, so a bit more of your payment goes to interest and a bit less to the balance.
The amount is tiny. On a $22,000 balance at 8.5%, about $364 of a $520 payment would normally go to principal. Leaving that $364 on the loan for an extra 15 days costs about $1.27. Even a full month late adds only around $2.50 in interest. If you're agonizing over interest, don't. The fee and the credit report are what cost money.
Your contract will state the fee in one of a few ways:
Some states cap auto loan late fees, either with a dollar ceiling or a percentage limit, and a few only require the fee to be "reasonable." Your retail installment contract will list the exact fee — look under late charges or default. Most contracts charge it once per late payment, but if you fall a second payment behind, you'll usually owe a second fee.
If this is your first late payment in years, call and ask for the fee to be waived. Many lenders do it once, and it costs you nothing to ask.
Lenders generally report a payment to Experian, Equifax and TransUnion once it is a full 30 days past due. Before then, being late is between you and your lender. After that, it's on your credit report for seven years.
How far your score falls depends on the rest of your file. FICO has published two examples of a single 30-day late payment:
| Score before | Score after one 30-day late | Drop |
|---|---|---|
| 793 | 710–730 | 63–83 points |
| 607 | 570–590 | 17–37 points |
Notice that the better your credit, the harder you fall. A clean file has more to lose from its first blemish.
The score drop matters most when you apply for credit. Experian's Q2 2026 data puts the average new-car rate at 4.41% for super-prime borrowers and 6.15% for prime borrowers. Used-car rates run 6.29% and 8.81%, and climb to 13.93% for near-prime. Estimating rates between those tier averages, here's what one 30-day late can cost on a five-year loan taken while the mark is recent:
| Score before | Next loan | Rate before → after | Monthly payment | Extra interest |
|---|---|---|---|---|
| 793 | $30,000 new | 4.81% → 6.15% | $564 → $582 | ~$1,110 |
| 740 | $25,000 used | 8.28% → 11.08% | $510 → $545 | ~$2,060 |
| 680 | $25,000 used | 11.09% → 13.65% | $545 → $577 | ~$1,950 |
That's 35 to 70 times the late fee, from one payment that went a few days too long. The same applies if you try to refinance your current loan. And because many insurers use credit-based insurance scores in most states, a late payment can nudge your premium up at renewal too.
The effect fades. A single late payment from four years ago weighs much less than one from four months ago, especially if everything since has been on time. If you need a car loan or refinance soon, though, recent is exactly when it hurts.
If the account rolls to 60 days, it's reported again with a worse status, and the score damage deepens. At 90 days, many lenders treat the loan as in default.
Repossession rules vary by state and by contract. In many states a lender can repossess as soon as you're in default, and some contracts define default as a single missed payment. In practice, most lenders wait until you're 60 to 90 days behind. Repossession adds towing, storage and sale costs. If the car sells at auction for less than you owe, you'll usually owe the difference too, and the repossession stays on your credit report for seven years.
If you can see that coming, selling the car yourself almost always leaves you in a better position than letting the lender take it.
If the payment is too high every month rather than just this month, a short-term fix won't hold. Check whether a refinance could lower it. Do it before a late payment makes refinancing more expensive.
Our late car payment cost calculator takes your payment, your contract's fee terms, how many days late you are, and your credit score. It shows the fee and interest now, and how much a 30-day late could add to your next car loan.