Car Down Payment Guide
How much should you put down on a car? We cover the recommended amounts for every price range, how sales tax gets added to your loan, and whether a bigger down payment is always the right move.
How Much to Put Down on a Car
New car minimum
20%
covers first-year depreciation
Used car minimum
10%
less depreciation risk
On a $40,000 car
$8,000
20% = ideal starting point
How Much Should I Put Down on a $40,000 Car?
Comparing down payment scenarios on a $40,000 car at 6.5% interest, 60-month term, with 7% sales tax ($2,800).
The 20% advantage: Putting 20% down on a $40k car saves $9,392 in total cost vs $0 down, and protects you from being underwater if the car depreciates.
Why 20% Down Is the Standard Recommendation
New cars depreciate fast
A new car loses 15–25% of its value in the first year. A $40,000 car is worth roughly $30,000–$34,000 after 12 months. With no down payment, your loan balance after 12 months of payments at 6.5% is about $33,000 — you could be underwater.
With 20% down ($8,000), your loan balance after year 1 is ~$26,600 — well below the car's value. You have positive equity from day one.
Underwater
Barely positive
Healthy equity
Strong equity
Estimates for a $40k car after 12 months of 6.5%/60mo payments, assuming 20% first-year depreciation.
How Sales Tax Adds to Your Car Loan
In most states, sales tax is applied to the vehicle purchase price and is typically added to your loan amount — not paid upfront. This means you pay interest on top of the tax.
No sales tax (OR/MT/NH)
$35k car, 20% down, 6.5%/60mo
$548/mo
Average tax (7%)
$35k car, 20% down, 6.5%/60mo
$596/mo
High tax (10%)
$35k car, 20% down, 6.5%/60mo
$616/mo
Sales Tax on a $35,000 Car by State
| State(s) | Rate | Tax on $35k | Added to Monthly Payment |
|---|---|---|---|
| Oregon / Montana / NH / DE | 0% | $0 | $0 |
| Colorado / Alabama | 2.9% | $1,015 | +$20/mo |
| California / Virginia | 7.25% | $2,538 | +$50/mo |
| Texas / Florida | 6.25% | $2,188 | +$43/mo |
| Tennessee / Arkansas | 9.55% | $3,343 | +$65/mo |
| Kansas / Mississippi | 10% | $3,500 | +$68/mo |
Based on 20% down, 6.5% rate, 60-month term. Actual rates vary — check your state's DMV for current figures. Some states tax only the financed amount after trade-in.
Try Your Down Payment Scenario
Frequently Asked Questions
The standard recommendation is 20% for a new car and 10% for a used car. On a $35,000 car, that's $7,000. The 20% target covers the first-year depreciation (15–25%) so you don't go underwater on your loan. If 20% is not achievable, aim for at least enough to cover taxes, title, and fees — typically $2,000–$3,500.
For a $40,000 car, the recommended down payment is $8,000 (20%). This gives you a loan amount of roughly $34,800 after 7% sales tax ($2,800). At 6.5% for 60 months, that's $681/month. With $0 down, your loan jumps to $42,800 and your payment rises to $837/month — $157 more per month, plus you're immediately underwater.
It depends on your state's rate. In a state with 7% tax, buying a $35,000 car means $2,450 in sales tax added to your loan. At 6.5% over 60 months, this adds approximately $47/month to your payment and $830 in total interest. States like Oregon, Montana, New Hampshire, and Delaware have no sales tax — a meaningful saving on expensive vehicles.
Generally yes — a larger down payment reduces your monthly payment, total interest, and keeps you out of negative equity. However, there are cases where investing the cash elsewhere makes more sense:
Put more down if: you'd be underwater without it, your loan rate is above 7%, or you don't have a robust emergency fund after the down payment.
Keep cash if: your loan rate is below 5% (cheap debt), you have high-interest other debt to pay off, or the money would earn more in savings/investments.
In most states, sales tax on a vehicle can be rolled into your auto loan — paid monthly rather than upfront at the dealership. Some dealers and lenders require tax to be paid out-of-pocket at signing. Always ask the dealer and your lender before assuming. Rolling tax into the loan is more convenient but costs more total since you pay interest on the tax amount for the full loan term.