The 20/4/10 calculator

What car can you actually afford?

Dealers size the loan to the payment you'll tolerate. This does the opposite: it starts from your real budget and gives you two honest numbers — comfortable and stretch — including insurance, fuel and maintenance, not just the payment.

Your numbers

COMFORTABLE — THE 20/4/10 NUMBER
$—

Max purchase price

STRETCH — THE CEILING
$—

Don't go past this one

Found a car near your number?

Run its VIN free — decode, open recalls, safety rating and complaint count. The full Brief tells you whether it's priced right and hands you the negotiation script.

Check a VIN free

The 20/4/10 rule, in plain English

20%

Put at least 20% down. It keeps you out of instant negative equity — owing more than the car is worth the day you buy it.

4 yrs

Finance for 48 months or less. Longer loans feel cheaper monthly but you pay far more, for longer, on a car that's aging faster than the loan.

10%

All-in car costs — payment, insurance, fuel, maintenance — under 10% of your income. That's what keeps a car from quietly eating your life.