Principal-only payments go straight to reducing what you owe, not toward interest or fees
A principal-only payment is money you send to your lender that reduces only the amount you borrowed, skipping the interest that would normally be due that month. Most car loans are structured so that early payments cover interest first, then principal. When you make a principal-only payment, you're asking the lender to explore your money differently — to the balance itself.
Whether your lender will accept a principal-only payment depends on your loan agreement and the lender's policies. Some allow it freely. Others require you to ask first or may charge a fee. A few won't allow it at all. The only way to know is to contact your lender directly and ask whether they accept principal-only payments and what process you need to follow.
Key Takeaways
- Principal-only payments skip the interest portion of your monthly payment and go directly to reducing your loan balance.
- Not all lenders allow principal-only payments, so you must contact your lender to confirm their policy before sending money.
- When you call or write, specify in writing that you want the payment applied to principal only, and ask for written confirmation.
- Some lenders charge a fee for principal-only payments or require you to make them through a specific channel, so ask about both before paying.
- Principal-only payments reduce the total interest you pay over the life of the loan and can shorten your payoff timeline.
Contact your lender and ask directly about their policy
Call the customer service number on your loan statement or bill. Tell them you want to make a principal-only payment and ask: Do you allow them? Is there a fee? Do I need to do anything special, or can I just note it in the payment memo?
Write down the name of the person you spoke with, the date, and what they told you. If they say yes, ask them to send you written confirmation of their policy. This protects you if there's a dispute later about how your payment was applied.
Some lenders have different rules depending on whether you pay online, by phone, by mail, or in person. Ask which method works for principal-only payments at your lender. A few lenders only accept principal-only payments by mail or through a specific online form, not through their regular payment portal.
Make the payment and document how you want it applied
Once you know your lender accepts principal-only payments, send the money through the method they specified. The critical step is clearly stating in writing that this payment should be applied to principal only.
If you pay by mail, write "PRINCIPAL ONLY" on the check memo line and include a note in the envelope saying the same thing. If you pay online, look for a memo or notes field and type the instruction there. If you pay by phone, ask the representative to note on your account that this payment is principal-only, and ask them to read it back to you to confirm.
Keep a copy of the check, a screenshot of the online payment confirmation, or a record of the phone call. These are your proof that you made the payment and how you instructed it to be applied.
Verify the payment was applied correctly on your next statement
When your next loan statement arrives, check the payment history section. It should show your principal-only payment and confirm that it reduced your principal balance. The interest charge for that month should still appear separately.
If the payment was applied as a regular payment (interest first, then principal), contact your lender when ready. Explain that you made a principal-only payment and ask them to reapply it. Keep records of this conversation as well.
Some lenders take one or two billing cycles to process and report principal-only payments correctly, so don't panic if it doesn't show up on the first statement. But if it's still wrong after two statements, escalate to a supervisor and reference your written confirmation of the lender's policy.
Understand what happens to your monthly payment obligation
Making a principal-only payment does not change your regular monthly payment amount or due date. You still owe your normal payment the following month. A principal-only payment is in addition to your regular payment, not instead of it.
Some borrowers think that making a principal-only payment lets them skip or reduce their next regular payment. It doesn't. If you miss a regular payment, your loan goes into default regardless of principal-only payments you made earlier.
What a principal-only payment does change is your payoff date and total interest. By reducing principal faster, you owe less interest going forward, and you pay off the loan sooner — but only if you keep making your regular payments on time.
Know the limits and fees some lenders impose
Some lenders cap how many principal-only payments you can make per year, or they charge a fee each time you make one. A few charge a flat fee per payment (typically $10 to $25), while others charge a percentage of the payment amount. Ask about this when you call to confirm the policy.
If there's a fee, do the math: Is the interest you save by paying down principal faster greater than the fee? For most loans, yes — but if your interest rate is very low (under 3%), the fee might eat into your savings. Your lender can tell you how much interest you'd save over the life of the loan if you make one principal-only payment now.
A small number of lenders don't allow principal-only payments at all, especially on subprime auto loans (loans to borrowers with poor credit). If yours is one of them, you can still pay extra toward your loan — you just can't specify that it go to principal only. The lender will explore extra payments according to their standard process, which usually means interest first, then principal.
Consider whether a principal-only payment makes sense for your situation
A principal-only payment is most useful if you have cash on hand and want to reduce interest without changing your monthly budget. It's also useful if you're close to being underwater on the loan (owing more than the car is worth) and want to build equity faster.
If you're struggling to make your regular payment, don't make a principal-only payment. Focus on your monthly obligation first. If you have extra money, it's usually better to put it toward an emergency fund or high-interest debt (credit cards, personal loans) before paying extra on a car loan.
If your car loan interest rate is very high (above 8%), principal-only payments save you more money. If your rate is low (below 4%), the savings are smaller, and a fee might offset them. Your lender can calculate the exact savings for you.
Frequently Asked Questions
Will a principal-only payment lower my monthly payment?
No. Your monthly payment stays the same. A principal-only payment reduces what you owe, which means less interest accrues over time and you pay off the loan sooner — but your next month's payment is still the same amount as always.
What if my lender won't accept principal-only payments?
You can still send extra money toward your loan. The lender will explore it according to their standard process, usually interest first, then principal. You won't have control over how it's split, but extra payments still reduce your balance and save interest.
Can I make a principal-only payment if I'm behind on my loan?
Most lenders won't accept a principal-only payment if you're delinquent. They'll require you to bring your account current first. If you're behind, contact your lender about a payment plan or deferment before attempting a principal-only payment.
Does a principal-only payment affect my credit score?
No. Only missed or late payments hurt your credit. Making a principal-only payment (or any extra payment) on time has no negative effect on your score and may help slightly by lowering your credit utilization ratio over time.
How much do I save by making one principal-only payment?
It depends on your loan balance, interest rate, and how much time is left on the loan. Your lender can calculate this for you. Generally, a $1,000 principal-only payment on a 5% loan saves you roughly $50 to $150 in interest, depending on how many months are left.