Should I Pay Off My Car Loan Early? The Math, the Catches and a Calculator
Figures checked October 28, 2026 against primary sources
Paying off a car loan early can save you real money, and it frees up your monthly payment for something else. But the savings depend on how your loan charges interest, whether your contract has a prepayment penalty, and what else that money could be doing. This guide runs the numbers at today's average auto loan rates, explains the two contract features that can shrink or erase your savings, and helps you decide whether the car loan is the right debt to attack first. The guidance comes from the Consumer Financial Protection Bureau (CFPB) and federal law.
The Short Answer
- Usually yes, if your loan uses simple interest and has no prepayment penalty. The CFPB says simple interest is far more common. Every extra dollar then cuts the interest you pay, with no risk.
- The savings are modest on a low rate and real on a high one. On a hypothetical $20,000 balance with 48 months left, $100 extra a month saves about $529 at 6.35% (the average new-car rate) and about $988 at 11.19% (the average used-car rate).
- Check two things in your contract first: a prepayment penalty, and whether interest is precomputed. On a precomputed loan, extra payments do not reduce the interest owed; you only get a refund of "unearned" interest when you pay the loan off.
- Emergency savings and higher-rate debt come first. Money sent to a car loan cannot be taken back, and credit card debt usually costs far more.
- Your credit score may dip a little when the loan closes, mainly if it was your only installment loan. The on-time payment history stays on your report.
Car Loan Early Payoff Calculator
Enter your payoff balance, interest rate and the number of payments left, then an extra amount each month, a one-time lump sum, or both. The calculator shows how much interest you save and how many months sooner the loan ends. It assumes a simple-interest loan with no prepayment penalty, the most common setup. The rate starts at Experian's Q2 2026 average for new-car loans.
Your lender's payoff quote is the exact figure to pay the loan off today, because it counts interest by the day. To see how a different rate or term would change your payment, use the auto loan calculator.
What Paying Early Saves: Worked Examples
Assumptions (hypothetical): a $20,000 balance with 48 monthly payments left, a simple-interest loan with no prepayment penalty, and Experian's Q2 2026 average rates: 6.35% for new-car loans and 11.19% for used-car loans. The scheduled payment is $472.92 at 6.35% (total interest left: $2,700) and $518.76 at 11.19% (total interest left: $4,900).
| Extra payment | At 6.35%: months saved | At 6.35%: interest saved | At 11.19%: months saved | At 11.19%: interest saved |
|---|---|---|---|---|
| $100 a month | 9 | $529 | 9 | $988 |
| $200 a month | 15 | $882 | 15 | $1,638 |
| $2,000 once, now | 5 | $533 | 5 | $1,024 |
| $5,000 once, now | 13 | $1,205 | 14 | $2,276 |
What the table shows:
- The rate matters more than anything. The same $100 a month saves almost twice as much on the used-car loan, because the rate is almost twice as high.
- Money paid early saves more. A $2,000 lump sum today saves about as much as $100 a month for the rest of the loan, which adds up to $3,800 of extra payments, because the lump sum stops interest from day one.
- Savings shrink as the loan ages. Most of the interest on an amortizing loan is paid in the early years. The CFPB notes that more of each payment goes to interest at the start of the term. With 12 payments left, there is little interest left to save.
Simple Interest vs Precomputed Interest
Whether paying early saves you anything depends on how your loan charges interest. Your contract and Truth in Lending disclosure will say which kind you have.
| Simple interest | Precomputed interest | |
|---|---|---|
| How interest is figured | On the balance you actually owe, daily or monthly | Total interest is calculated up front and added to the loan |
| How common | Far more common, per the CFPB | Uncommon, per the CFPB |
| Extra payments | Reduce principal, so less interest accrues | Do not reduce the principal or interest owed |
| Paying off early | You owe only the principal plus interest to date | You get a refund of some "unearned" interest |
The CFPB says precomputed interest benefits the lender if you pay more than the minimum or pay off the loan early, and that a borrower who plans to pay early wants a simple-interest loan. If your loan is precomputed, extra monthly payments do little for you. A full early payoff still saves money, through the interest refund, but how big that refund is depends on the method in your contract.
The Rule of 78s
The Rule of 78s is a way of dividing up the interest on a precomputed loan that loads it toward the early months. The name comes from a 12-month loan: the digits 1 through 12 add up to 78, so the first month is charged 12/78 of the year's interest, the second month 11/78, and so on. When you pay off early, the refund of "unearned" interest is figured the same way, so it is smaller than what you would save on a simple-interest loan (the actuarial method).
Federal law bans it on longer loans. Under 15 U.S.C. 1615, when a consumer pays off a precomputed loan with a term longer than 61 months (made after September 30, 1993), the lender must compute the interest refund with a method at least as favorable to the consumer as the actuarial method. The same law requires a prompt refund of unearned interest whenever any consumer credit transaction is prepaid in full (refunds under $1 excepted). The federal ban does not reach loans of 61 months or less, so check your contract and your state's rules.
How much it costs (hypothetical): a $30,000 precomputed loan at 8% for 60 months (just under the 61-month line), with $6,497.52 of interest built in, paid off in full early:
| Paid off after | Interest refund, Rule of 78s | Interest saved, actuarial (simple interest) | Rule of 78s costs you |
|---|---|---|---|
| 12 payments | $4,175 | $4,281 | $106 |
| 24 payments | $2,365 | $2,487 | $122 |
| 36 payments | $1,065 | $1,149 | $84 |
So the Rule of 78s trims your savings but does not wipe them out: paying off this loan after a year still saves over $4,000. The bigger problem with a precomputed loan is that partial extra payments do nothing until you pay the whole balance. If you have one, save the extra money separately and pay the loan off in one go when you can. The law also gives you the right to a statement of the amount needed to pay off a precomputed account within five days of asking, with one free statement a year.
Prepayment Penalties
The CFPB says your contract and state law decide whether you can pay off an auto loan early without a fee. Some lenders include a penalty because early payoff reduces the interest they collect; some states prohibit prepayment penalties for certain loans.
- Check your contract for a prepayment penalty clause, and check your state's law to see whether it is allowed.
- Weigh the fee against the interest saved. A flat fee smaller than the interest you would save can still be worth paying, especially early in the loan.
- Refinancing counts as prepaying. The CFPB notes that refinancing pays the original loan off in full, so a penalty can apply then too.
- Shopping for a new loan? Ask whether it has a prepayment penalty before you sign. The CFPB says you can negotiate to have the clause removed or ask for a different loan.
How to Pay Off a Car Loan Early the Right Way
- Read your contract. Confirm simple interest and no prepayment penalty.
- Ask how extra payments are applied. The CFPB says payments generally go first to fees such as late fees, then to interest due, then to principal. You may be able to ask your lender to apply extra money to principal; check your loan documents first, and look for a "principal only" option when you pay.
- Keep making the regular payment on time. Make sure the extra is applied to principal, not held as an early payment toward next month's bill. The CFPB suggests checking your monthly statement to confirm how a payment was applied.
- Get a payoff quote before paying the loan off in full. The CFPB notes that the payoff amount can differ from the balance on your statement, because of how interest is calculated and any unpaid fees.
- After the last payment, make sure you receive the title or lien release, and that any optional products you bought with the loan, such as GAP coverage or a service contract, are canceled if you no longer want them. The CFPB says you may be entitled to a refund on GAP coverage if you prepay the loan; see is GAP insurance worth it.
Will Paying Off a Car Loan Hurt My Credit Score?
Possibly a little, and usually not for long. Two things are going on:
- Credit mix is a small factor. myFICO says FICO Scores weigh five categories: payment history (35%), amounts owed (30%), length of credit history (15%), new credit (10%) and credit mix (10%). Installment loans are one of the credit types in the mix. If the car loan is your only open installment loan, closing it can change your mix. myFICO adds that since credit mix is only 10% of the score, it most likely won't be a key factor in getting credit.
- Your good history stays. The CFPB says positive, on-time payment history may be reported after a loan is paid off and even after the account is closed.
We could not find an official figure for how many points a payoff moves a score, and it varies by person and scoring model. A small, temporary change is rarely a good reason to keep paying interest.
Pay Off the Car, Invest or Build Savings?
Extra money on a car loan earns exactly the loan's rate, guaranteed. Whether that beats other uses depends on the rate and on what is missing elsewhere. A reasonable order:
| Priority | Why |
|---|---|
| 1. A starter emergency fund | Money paid into a loan cannot be taken back. Without savings, a car repair or job loss can land on a credit card. |
| 2. An employer 401(k) match | Matching contributions are an immediate return that paying down a car loan cannot beat. |
| 3. Higher-rate debt | Credit cards and personal loans usually charge more than a car loan. Pay the highest rate first; see debt avalanche vs snowball. |
| 4. The car loan, if the rate is high | At a rate like the used-car average of 11.19%, a guaranteed return of that size is hard to beat by investing. |
| 5. Investing, if the rate is low | On a low or promotional rate, long-term investing may earn more, but with risk and no guarantee. Keep paying the loan on schedule. |
Two more cases favor paying early. If you are upside down on the loan, extra principal closes the gap between what you owe and what the car is worth, which matters if you may need to sell or trade it. And if the payment strains your budget, being done sooner frees that cash for good; the average car payment is now $765 a month for new cars and $542 for used ones, according to Experian.
Paying early makes less sense when your rate is very low, when the loan is near its end (little interest left), when your contract has a penalty larger than the savings, or when the loan is precomputed and you cannot pay it off in full yet.
Sources & Methodology
- CFPB, What's the difference between a simple interest rate and precomputed interest on an auto loan?: how each method works, which is more common, refund of unearned interest.
- CFPB, Can I prepay my loan at any time without penalty?: contracts, state law, refinancing, negotiating the clause.
- CFPB, Is it better to pay off the interest or principal on my auto loan?: order in which payments are applied.
- CFPB, What is amortization and how could it affect my auto loan?
- CFPB, Should I trade in my car if it's not paid off?: payoff amount vs statement balance.
- CFPB, What is Guaranteed Asset Protection (GAP) insurance?: refund when the loan is paid off early.
- CFPB, How long does information stay on my credit report?: positive history after a loan is paid off.
- 15 U.S.C. 1615: refund of unearned interest, the Rule of 78s ban for precomputed loans over 61 months, payoff statements.
- myFICO, What's in my FICO Scores?: score categories and their weights.
- Experian, average car payment and loan rates (Q2 2026): 6.35% new, 11.19% used; $765 and $542 average payments.
Methodology: the calculator and the worked examples use a standard amortization: interest each month is the balance times the APR divided by 12, rounded to the cent, and extra payments go straight to principal. Real simple-interest auto loans usually accrue interest daily, so a lender's figures can differ by a few dollars. The Rule of 78s example compares the sum-of-the-digits refund with the interest left on an actuarial (level-payment) schedule for the same loan.
FAQ
Is it smart to pay off a car loan early?
Usually, if the loan uses simple interest, has no prepayment penalty, and you already have emergency savings and no higher-rate debt. Each extra dollar saves interest at your loan's rate. It matters most when the rate is high and the loan is young.
How much will I save by paying off my car loan early?
It depends on the balance, the rate and the time left. In our hypothetical example, $20,000 with 48 months left, $100 extra a month saves about $529 at 6.35% and about $988 at 11.19%, and ends the loan 9 months early. Use the calculator above for your numbers.
Does paying extra on a car loan go to principal?
On a simple-interest loan, money beyond what is due generally goes to principal after fees and interest due. Ask your lender how it applies extra payments, use a "principal only" option if there is one, and check your statement. On a precomputed loan, extra payments do not reduce the interest owed.
Can I get a refund of interest if I pay off a precomputed loan early?
Yes. Federal law requires the lender to promptly refund unearned interest when you prepay a consumer loan in full, unless the refund is under $1. On precomputed loans longer than 61 months, the refund must be at least as favorable as the actuarial method, so the Rule of 78s cannot be used.
Do car loans have prepayment penalties?
Some do. It depends on your contract and state law; some states prohibit them for certain loans. Look for a prepayment clause in your contract and Truth in Lending disclosure.
Does paying off a car loan early hurt your credit?
It can lower a score slightly for a while, mostly if it was your only installment loan, because credit mix is one scoring factor (10% of a FICO Score). Your on-time payment history can stay on your report after the account closes.
Is it better to make one big payment or extra monthly payments?
On a simple-interest loan, money paid sooner saves more interest, so a lump sum now beats the same total spread over months. In our example, $2,000 today saved about as much as $100 a month for the life of the loan. On a precomputed loan, partial payments do not help; save up and pay it off in full.
This article is for general information and is not financial or legal advice. Guidance is from CFPB pages and 15 U.S.C. 1615, read on 2026-10-27; credit score weights are from myFICO. Average rates and payments are Experian Q2 2026 figures as reported on our auto loan pages. All worked examples are hypothetical. Prepayment rules vary by state and contract; check your loan documents.
