How much should I put down on a car to not be upside down?
Put down roughly 20% on a car, enough to cover its first-year depreciation, so the resale value usually stays at or above what you still owe. With less down you go upside down: on a $30,000 car, $1,000 down leaves you owing about $27,500 against a $24,000 value — around $3,500 short.
How to do it
- Estimate the car's first-year depreciationA typical new car loses roughly 20% of its value in year one. Use that as your target down payment.
- Put down at least that amountOn a $30,000 car, aim for about $6,000 down so you finance closer to what the car will actually be worth.
- Compare your balance to the resale valueAfter a year you want to owe less than the car is worth. If your balance sits below resale value, you can sell without paying cash.
- Run the numbers before you signPlug your price, down payment and term into the same math. If you'd be underwater in year one, increase the down payment or pick a cheaper car.
Questions that come up
What if I can't afford 20% down?
Then wait and save more, choose a less expensive car, or shorten the loan term so the balance falls faster. If you must buy sooner, gap insurance covers the shortfall only if the car is totaled, not if you simply want to sell.
Does this apply to used cars?
Yes, but used cars usually depreciate more slowly, especially after the steep first-year drop the original owner absorbed. A smaller down payment can keep you above water, so check that specific model's depreciation curve rather than assuming a flat 20%.
What counts toward the down payment?
Cash plus any positive trade-in equity. Watch out for rolling an old loan's negative equity into the new one — that starts you deeper underwater, undoing the down payment before you even drive off.
Full transcript
Put twenty percent down on a car to cover year one's drop. Finance a thirty-thousand car with a thousand down. A year later it's worth twenty-four — you owe twenty-seven five. You're upside down — worth less than you owe, stuck. Put six thousand down, owe twenty-two five — below its value. Now you can sell. Run your own numbers before you sign — down payment first.