Free Car Affordability Calculator

Working backward from a payment you can afford

Most car shopping starts with a price and discovers the payment afterward. This calculator runs the other direction: you set the monthly payment you're comfortable with, and it solves for the vehicle price that payment actually supports once tax and your down payment are accounted for.

Why the price is lower than payment × months

$450 across 60 months totals $27,000, but the calculator says you can afford about $24,527 including your $3,000 down. Two things absorb the difference: interest (roughly $4,001 over the loan) and sales tax (about $1,472), neither of which buys you any car.

This is the single most useful thing the calculation shows. The gap between what you pay and what you get widens with higher rates and longer terms.

How the loan term shifts your answer

Extending to 72 months raises the supported price to roughly $28,085 on the same $450 payment — about $3,500 more car. That's genuinely more buying power, but total interest rises from about $4,001 to $5,630.

There's also a depreciation problem. A longer term means slower equity building against a vehicle losing value fastest in its early years, so you spend more of the loan underwater — owing more than it's worth. If you're using a long term specifically to reach a higher price, that's the trade you're making.

What a payment you can technically afford leaves out

This calculator answers a financing question, not a budgeting one. The payment is only part of what a car costs each month:

• Insurance, which varies sharply by vehicle, driver, and location — and is often higher on newer or financed cars, since lenders require comprehensive and collision coverage.
• Fuel or charging, driven by your actual commute rather than the sticker's efficiency rating.
• Maintenance and repairs, which rise as the vehicle ages and warranty coverage ends.
• Registration and taxes, recurring annually in most states.

A commonly cited guideline is keeping all vehicle costs combined under about 15–20% of take-home pay. That's a rule of thumb rather than a rule, but it's a useful sanity check against a payment that looks affordable in isolation.

Getting a realistic rate into the calculation

The interest rate has a large effect on the answer, and advertised rates usually reflect the strongest credit profiles. Getting pre-approved through your own bank or credit union before shopping gives you a rate you'll actually receive, which makes this estimate meaningful rather than aspirational — and gives you a benchmark to hold dealer financing against.

Common mistakes

• Treating the maximum as the target. The number here is a ceiling, not a recommendation.
• Using an optimistic interest rate. A rate two points higher meaningfully lowers the price you can support.
• Ignoring the trade-in's tax effect. In most states a trade-in reduces the taxable amount, stretching your budget further than the same amount in cash.
• Forgetting fees. Documentation, title, and registration charges come on top of the price shown.

What this calculator doesn't include

It models price, tax, down payment, trade-in, rate, and term. It doesn't account for dealer fees, add-on products, rebates, or promotional financing, and it assumes a fixed rate with equal payments throughout. Sales tax treatment of trade-ins also varies by state — a few tax the full purchase price regardless.

Once you've settled on a price, the Auto Loan Calculator shows the full payoff schedule and total interest for that specific loan.