What counts as a good down payment

A good down payment is typically 10 to 20 percent of the car's purchase price, though lenders will work with less. The exact amount depends on three things: how much you can afford to put down without straining your budget, what interest rate the lender will offer you, and whether you're buying new or used.

The relationship between down payment size and interest rate is direct. Put down 20 percent and you'll see a lower rate than if you put down 5 percent. The lender sees a smaller loan relative to the car's value, which means less risk if you stop paying and they have to sell the vehicle. That lower risk translates to a lower rate for you.

However, "good" also means not emptying your savings. A down payment that leaves you with no emergency fund creates a different kind of risk — if your car needs a repair or you face an unexpected expense, you'll have to borrow again, often at worse terms. The math of a slightly higher interest rate is usually better than the math of having zero cushion.

Key Takeaways

  • Down payments between 10 and 20 percent of the purchase price are standard, but lenders will finance cars with down payments as low as 3 to 5 percent.
  • A larger down payment lowers your interest rate because the lender's risk decreases when the loan is smaller relative to the car's value.
  • Putting down money you cannot afford to lose — money that would otherwise be your emergency fund — usually costs more in the long run than paying a slightly higher interest rate.
  • Used cars often require a larger down payment than new cars, and interest rates on used-car loans are typically higher regardless of your down payment size.
  • The total cost of the loan (interest plus principal) matters more than the down payment size alone; a smaller down payment at a much lower rate can cost less overall than a large down payment at a high rate.

How down payment size affects your interest rate

Lenders price interest rates based on loan-to-value ratio, or LTV. This is the loan amount divided by what the car is worth. If you're buying a $25,000 car and put down $5,000, your loan is $20,000 and your LTV is 80 percent. If you put down $10,000, your LTV is 60 percent.

A lower LTV means the lender loses less money if they have to repossess and sell the car. That security translates to a lower rate. The difference is usually 0.5 to 2 percentage points depending on your credit score and the lender. On a $20,000 loan over five years, a 1 percentage point difference means roughly $1,000 in extra interest over the life of the loan.

This is why the down payment size matters, but it's not the only thing that matters. Your credit score, the age and mileage of the car, and the lender you choose all move the rate up or down. A buyer with excellent credit and a 10 percent down payment might pay less total interest than a buyer with fair credit and a 20 percent down payment.

The difference between new and used cars

New cars depreciate fastest in the first year, which is why lenders are more comfortable financing them with smaller down payments. A new car with a 5 percent down payment is still a reasonable loan-to-value ratio. Used cars, especially those over five years old, depreciate more slowly but have already lost their steepest value drop, so lenders see more risk. Most used-car loans require 10 to 15 percent down.

Interest rates on used-car loans are also higher across the board. A buyer with good credit might get 4 percent on a new car but 6 percent on a used one, even with the same down payment percentage. This is because used cars have more unknown history and higher failure rates. The higher rate applies whether you put down 5 percent or 20 percent.

If you're buying used, the down payment becomes more important to your total cost because you're already paying a higher rate. Putting down 15 to 20 percent on a used car is more common and more effective at lowering your rate than it would be on a new car.

When a smaller down payment makes financial sense

A smaller down payment — 3 to 7 percent — can be the right choice if you have a strong emergency fund and the interest rate difference is small. This is especially true if you have good credit and are buying a new car from a lender offering competitive rates.

The math works like this: if you have $8,000 saved and are buying a $30,000 car, putting down $6,000 (20 percent) leaves you with $2,000. That's thin. Putting down $3,000 (10 percent) leaves you with $5,000, which is enough to cover most car repairs or a month of expenses if you lose income. The extra $3,000 in your account is worth more than the extra interest you'll pay on the loan.

This logic breaks down if the rate difference is steep or if you don't actually have a full emergency fund. If you're financing because you don't have savings, a smaller down payment is not a strategy — it's a sign you're not ready to buy yet.

Down payment amounts across different lenders

Banks, credit unions, and captive lenders (the financing arms of car manufacturers) have different down payment requirements. Banks typically want 10 to 20 percent. Credit unions often work with 5 to 10 percent, especially if you're a member in good standing. Captive lenders sometimes advertise zero-down financing, though the interest rate is usually high enough to offset the benefit.

Getting pre-approved for a loan before you shop for a car tells you exactly what down payment the lender expects and what rate you'll receive at different down payment levels. This removes guesswork and gives you negotiating power at the dealership. Many lenders will show you a rate sheet that lists the rate at 5 percent down, 10 percent down, 15 percent down, and so on.

Online lenders and peer-to-peer lending platforms have entered the car-loan market and sometimes offer lower rates than traditional lenders, but they typically require larger down payments — 15 to 25 percent — to offset the higher risk of lending to borrowers they haven't met.

How to decide your down payment amount

Start by calculating what you can afford to put down without compromising your emergency fund. Most financial advisors recommend keeping three to six months of expenses in savings. If you have that, anything beyond it is available for a down payment. If you don't have that yet, a car purchase should wait or the down payment should be smaller so you can rebuild savings afterward.

Next, get pre-approved by at least two lenders — a bank and a credit union, or two credit unions. Ask each one for a rate quote at 5 percent, 10 percent, and 15 percent down. This shows you the actual dollar difference each percentage point makes for the specific loan you're considering.

Then compare total cost, not just the down payment or the rate. A $25,000 car with $2,500 down (10 percent) at 6 percent over 60 months costs roughly $27,300 total. The same car with $5,000 down (20 percent) at 5 percent costs roughly $26,800 total. The difference is $500, but you've tied up an extra $2,500 in the car instead of keeping it liquid. Whether that trade-off makes sense depends on your situation.

What happens if you can't afford 10 percent down

Many buyers put down less than 10 percent, and lenders will finance them. The rate will be higher, and you'll pay more interest over the life of the loan. This is not ideal, but it's not a barrier to buying a car if you need one.

If you're considering a down payment below 5 percent, look at whether waiting six months to save more would meaningfully improve your situation. Saving an extra $2,000 to $3,000 can lower your rate by 0.5 to 1 percentage point, which saves you hundreds in interest. If you can wait, it's usually worth it.

If you can't wait — your current car has failed, or you need reliable transportation for work — then a smaller down payment is the right choice. The higher interest rate is the cost of buying now instead of later. Make sure you can afford the monthly payment, because that's what matters most to your budget.

Frequently Asked Questions

Is 10 percent down payment required, or can I put down less?

Ten percent is standard but not required. Lenders will finance cars with 3 to 5 percent down, though your interest rate will be higher. Some captive lenders offer zero-down financing, but the rate is usually high enough that you're paying for the privilege. Check with your lender to see what they'll accept.

Does a bigger down payment always mean a better deal?

Not always. A bigger down payment lowers your interest rate, but it also ties up cash you might need. If putting down 20 percent instead of 10 percent saves you $1,000 in interest but leaves you with no emergency fund, the math doesn't work. Compare the total cost of the loan against the amount of savings you'd have left.

What if I have bad credit — does my down payment need to be larger?

Yes, typically. Lenders see bad credit as higher risk, so they ask for a larger down payment to offset that risk. You might need 15 to 25 percent down where a buyer with good credit could put down 10 percent. The down payment and the interest rate both adjust for credit risk.

Can I use a credit card or loan to fund my down payment?

Technically yes, but it's usually a bad idea. If you borrow money to make a down payment, you're paying interest on two loans instead of one. The interest on a credit card is also much higher than a car loan. Save the down payment from your income or existing savings instead.

Should I put down my entire savings as a down payment to lower the loan amount?

No. Keeping an emergency fund is more important than minimizing the loan amount. If you put down everything you have and then face a car repair, medical bill, or job loss, you'll have to borrow again at worse terms. A slightly larger loan with a full emergency fund is the safer choice.