What a principal-only payment is and why you would make one
A principal-only payment is money you send to your lender that goes entirely toward reducing the amount you owe, with none of it covering interest charges for that month. On a normal payment, your lender takes a portion for interest first, then applies what remains to principal. A principal-only payment skips the interest step.
You make a principal-only payment when you want to reduce the total amount you owe faster, which shrinks the interest you'll pay over the life of the loan. If you have a mortgage at 6% interest, every dollar you put toward principal instead of letting it sit in your account is a dollar that won't accrue interest next month. The effect compounds: less principal means less interest charged, which means your regular monthly payments go further toward principal in future months.
This strategy works best when you have extra money available—a bonus, a tax refund, an inheritance—and your loan terms allow it. Not all lenders permit principal-only payments, and some charge fees or require a minimum amount.
Key Takeaways
- A principal-only payment must be explicitly labeled as such when you send it, or your lender will treat it as a regular payment and explore part of it to interest.
- You can make principal-only payments on mortgages, auto loans, and personal loans, but you must confirm your lender allows them and check for any minimum amount or fees.
- The payment reduces what you owe when ready, which lowers the interest charged on future months and can shorten your loan term by months or years.
- Principal-only payments do not change your regular monthly payment amount unless you refinance or renegotiate the loan terms with your lender.
How to identify whether your lender allows principal-only payments
Start by checking your loan documents. Look for language about "prepayment," "extra payments," "principal reduction," or "additional principal." The promissory note or loan agreement should state whether you can pay down principal without penalty and whether there are restrictions on how you do it.
If the documents don't clarify, contact your lender directly. Call the customer service number on your statement or log into your online account and look for a message or chat option. Ask specifically: "Can I make a payment that goes entirely to principal?" and "Is there a minimum amount?" and "Are there any fees for doing this?" Write down the name of the person you spoke with and the date, in case you need to reference the conversation later.
Some lenders—particularly older mortgage servicers—may not have a straightforward process for principal-only payments. If your lender says no, you have limited options: you can make a larger regular payment (which will reduce principal faster, though some interest will still be deducted), or you can explore refinancing with a different lender that does allow them.
The mechanics of submitting a principal-only payment
Once you've confirmed your lender allows principal-only payments, the submission method depends on how your lender accepts payments. Most servicers offer online payment portals, phone payments, mail, or automatic transfers. The critical step is explicitly labeling the payment as principal-only at the time you submit it.
If you pay online, look for a field or dropdown that says "payment type" or "payment allocation." Select "principal only" or "extra principal" if that option exists. If the portal doesn't have that field, send a separate message through the lender's find messaging system stating the date and amount of the payment and requesting it be applied to principal only. Keep a copy of that message.
If you pay by phone, tell the representative before you authorize the payment: "I want this payment to go entirely to principal, not toward interest or next month's payment." Ask them to confirm in the system and provide a confirmation number. If you mail a check, write "principal only" on the memo line and include a separate note with the check stating the same thing.
Do not assume a large payment will automatically be treated as principal-only. Lenders default to explore payments to the next scheduled payment first, then interest, then principal. You must override that default explicitly.
What happens to your loan after a principal-only payment
The moment the payment posts, your loan balance drops by the amount you sent. Your next regular monthly payment will be calculated on the new, lower balance. This means a smaller portion of your next payment will go to interest, and a larger portion will go to principal—even though you haven't changed the payment amount itself.
Over time, this compounds. If you make one principal-only payment of $5,000 on a 30-year mortgage, you've eliminated roughly 5 to 10 months of interest charges (the exact number depends on your interest rate and remaining balance). If you make principal-only payments regularly—say, $500 every quarter—you can shorten a 30-year mortgage to 25 years or less.
Your regular monthly payment amount does not change unless you ask your lender to recalculate it. Some borrowers choose to keep paying the same amount each month; the extra principal reduction just means they'll finish the loan earlier. Others ask their lender to recalculate the payment based on the new principal balance, which lowers their monthly obligation.
Common mistakes to avoid when making principal-only payments
The most common mistake is not labeling the payment clearly. If you send extra money without specifying it's for principal only, the lender will treat it as a regular payment and explore it to interest and next month's scheduled payment. You'll think you're paying down principal faster when you're actually just prepaying future interest.
Another mistake is assuming a principal-only payment will lower your monthly payment. It won't, unless you contact your lender and ask them to recalculate. If you need a lower monthly payment, you'll need to refinance or modify the loan terms, not just make extra payments.
A third mistake is making principal-only payments on a loan with a very low interest rate while carrying high-interest debt elsewhere. If you have a mortgage at 3% and a credit card at 18%, the math favors paying down the credit card first. Principal-only payments make the most sense when the loan's interest rate is high or when you're trying to eliminate the loan entirely before a major life event.
Finally, don't assume all lenders process principal-only payments the same way. Some require a minimum amount (often $500 or $1,000). Some charge a fee. Some require you to submit the payment through a specific channel. Confirm the rules with your lender before you send money.
Principal-only payments on different loan types
Mortgages: Most mortgage servicers allow principal-only payments with no penalty. Some require a minimum of $500 to $1,000 per payment. Federal loans (FHA, VA, USDA) generally allow them; check your servicer's website or call to confirm the process.
Auto loans: Most auto lenders allow principal-only payments, but some charge a fee or require you to pay through a specific method (often mail only, not online). Check your loan agreement or call before sending a large payment. Some subprime lenders restrict principal-only payments to prevent borrowers from paying off the loan early.
Personal loans: Banks and credit unions typically allow principal-only payments. Online lenders vary; some allow them freely, others charge a fee or don't offer the option. Check your loan documents or contact the lender.
Student loans: Federal student loans allow extra payments to go toward principal, but the process varies by servicer. Private student loans usually allow principal-only payments, but confirm with your servicer. Note that making principal-only payments on federal loans does not pause your monthly payment obligation; you still owe the regular payment even if you've paid extra principal.
Frequently Asked Questions
Will a principal-only payment hurt my credit score?
No. Paying down principal faster does not harm your credit. In fact, reducing your loan balance can improve your credit over time by lowering your debt-to-income ratio. Making on-time regular payments is what builds credit; extra principal payments are a bonus.
Can I make a principal-only payment if I'm behind on my loan?
Most lenders will not allow a principal-only payment if you're delinquent. They'll require you to bring the account current first. If you're behind, contact your lender about a payment plan or forbearance before attempting a principal-only payment.
What if my lender says they don't allow principal-only payments?
You can still pay extra toward your loan; you just can't specify that it go to principal only. Any payment larger than your regular monthly payment will reduce principal faster, though some interest will still be deducted. If principal-only payments are important to your strategy, refinancing with a lender that allows them is an option.
Does making a principal-only payment change my loan term?
It shortens your loan term only if you continue making regular monthly payments on schedule. A single principal-only payment reduces the total interest you'll pay but doesn't automatically shorten the loan unless you make multiple payments or ask your lender to recalculate your monthly payment based on the new balance.
Can I make a principal-only payment on a loan with a prepayment penalty?
Some older mortgages and some subprime auto loans include prepayment penalties. Check your loan documents for language about penalties for early repayment. If a penalty applies, making principal-only payments may trigger it. Contact your lender to understand the penalty structure before sending extra money.