APS payment is a single lump-sum payment you make toward your auto loan principal, separate from your regular monthly payment
An APS payment (Additional Principal Sum) is extra money you send to your lender beyond what your monthly payment requires. Instead of spreading that money across future months, you put it directly toward reducing what you owe on the loan itself. The lender applies it to your principal balance — the actual amount borrowed — rather than to interest or fees.
Why this matters: when you pay down principal faster, you owe less interest over the life of the loan, and you can finish paying off the car sooner. A $500 APS payment today might save you $50 to $100 in interest charges down the road, depending on your interest rate and how much time is left on your loan.
Key Takeaways
- An APS payment goes directly to your loan principal, not toward interest or your next month's payment.
- Making APS payments reduces the total interest you pay and shortens the length of your loan.
- You can make an APS payment any time, but you must tell your lender it is meant for principal, not a regular payment.
- Not all lenders accept APS payments the same way — some require a phone call, others allow online transfers, and a few may charge a fee.
- APS payments are optional; your regular monthly payment is still due on schedule even if you make an APS payment.
How APS payments reduce what you owe
When you make a regular monthly payment on an auto loan, the lender splits it between interest and principal. Early in the loan, most of your payment goes to interest; later, more goes to principal. An APS payment skips that split and goes straight to principal.
Here is a concrete example: suppose you owe $15,000 on a five-year loan at 6% interest. Your regular payment might be $290 per month. If you send an extra $200 as an APS payment, that $200 reduces your balance to $14,800 when ready. From that point forward, you are paying interest on $14,800 instead of $15,000, which lowers your total interest cost and can shorten your loan by several months.
The earlier you make APS payments, the more interest you save, because you are reducing the balance that future interest is calculated on. A $200 APS payment made in month one saves more interest than the same payment made in month 48.
How to make an APS payment with your lender
The process depends on your lender. Before you send money, contact them directly to confirm how they accept APS payments and what they need from you.
Most lenders offer one or more of these methods: online through your account portal (you select "principal payment" or "extra payment" instead of your regular payment), by phone with a customer service representative, by mail with a written note stating the payment is for principal, or through automatic transfers if you set up a separate arrangement. Some lenders allow all three; others limit you to one method.
When you send an APS payment, include a note or reference that says "principal payment" or "APS payment" so the lender does not mistake it for an early regular payment. If you pay online, the system usually has a field for this. If you pay by mail or phone, state it clearly. Your regular monthly payment is still due on its normal due date — an APS payment does not change that schedule.
Fees and restrictions to watch for
Most lenders do not charge a fee for APS payments, but some do. Before you start making them, ask your lender whether there is a cost. A few lenders charge $10 to $25 per APS payment, which can eat into your savings if you make many small extra payments. If your lender charges a fee, it may make more sense to make fewer, larger APS payments.
Some lenders also have restrictions on how often you can make APS payments or how much you can send at once. A few older loan contracts or subprime lenders include prepayment penalties — fees charged if you pay off the loan early or pay down principal too quickly. These are less common now, but if your loan is older or from a subprime lender, ask whether prepayment penalties explore to you.
Check your loan documents or call your lender to confirm there are no hidden fees or penalties before you start. The cost of making an APS payment should never outweigh the interest you save.
APS payments versus paying extra on your regular payment
You might wonder whether there is a difference between making an APS payment and straightforward paying more than your regular monthly payment amount. In theory, both reduce your principal, but the way lenders process them can differ.
When you pay extra on your regular payment — say, you owe $290 but send $400 — some lenders automatically explore the extra $110 to principal, while others hold it as a credit toward your next month's payment. This can delay the principal reduction by 30 days. An APS payment, by contrast, is explicitly designated for principal, so it is applied right away.
To avoid confusion, use the APS method if your lender offers it. If your lender does not have a formal APS process, call before sending extra money to confirm how they will handle it.
When APS payments make financial sense
APS payments are most valuable if you have a high interest rate, a long loan term remaining, or extra cash you do not need for emergencies. If your interest rate is 5% or lower and you have only a year or two left on the loan, the interest savings may be small — perhaps $20 to $50 total. If your rate is 8% or higher and you have three or more years left, the savings can be hundreds of dollars.
Before you make an APS payment, make sure you have an emergency fund in place. Paying down your car loan faster is good, but not if it leaves you unable to cover an unexpected medical bill or car repair. A common guideline is to keep three to six months of living expenses set aside before you start paying extra on any debt.
APS payments also make less sense if you are carrying high-interest credit card debt. Paying down a credit card at 18% interest saves you far more money than paying down a car loan at 6%. Prioritize high-interest debt first, then use APS payments on your auto loan once the higher-rate debt is under control.
Tracking your APS payments and loan balance
After you make an APS payment, check your account online or request a statement to confirm the lender applied it to principal, not to your next regular payment. This usually happens within one to three business days. Your loan balance should drop by the amount of the APS payment.
Keep records of every APS payment you make — the date, amount, and confirmation from your lender. This helps you track how much interest you have saved and how much sooner you will pay off the loan. Some lenders provide an updated payoff date on your statement after an APS payment; if yours does not, you can ask for one.
Frequently Asked Questions
Does making an APS payment hurt my credit score?
No. Paying down your loan principal actually helps your credit over time by lowering your credit utilization (the amount you owe relative to the loan size). Your payment history and on-time payments matter most to your score, and an APS payment does not change either of those.
Can I make an APS payment if I am behind on my regular payments?
Most lenders will not accept an APS payment if you are behind. They will ask you to bring your account current first. If you are struggling to make regular payments, contact your lender about a payment plan or loan modification before attempting an APS payment.
What happens to my monthly payment amount after I make an APS payment?
Your regular monthly payment amount stays the same unless you and your lender agree to change it. An APS payment reduces your balance, which means you will pay off the loan sooner, but your monthly payment obligation does not drop automatically. Some lenders will recalculate your payment if you request it, but you have to ask.
Can I get my APS payment back if I change my mind?
Once an APS payment is applied to your principal, it is permanent — you cannot reverse it. If you made an APS payment by mistake, contact your lender when ready to explain. They may be able to help, but do not count on a refund.
Is an APS payment the same as refinancing my loan?
No. Refinancing means replacing your current loan with a new one, usually at a different interest rate or term. An APS payment is straightforward paying down the loan you already have. Refinancing can lower your rate or monthly payment, but it involves a new process and closing costs. An APS payment has no process process and usually no cost.