Car Affordability Calculator
A car costs far more than the monthly payment. This adds up insurance, fuel, and upkeep so you can see the real cost before you sign anything.
The true cost of a car
Dealers and ads focus on the monthly payment, but that's only one piece. Insurance, fuel or charging, registration, tires, and repairs all stack on top. This calculator adds them together and compares the total to your income, so the number you see is the number you'll actually live with.
The 15% guideline
A practical target is to keep all car costs at or under roughly 15% of your take-home pay, with the loan payment itself near 10%. Above that, a car starts crowding out savings and makes a single bad month — a repair, a slow paycheck — harder to absorb.
Example scenarios
Within budget: On $4,000 take-home, a $350 payment with $130 insurance, $150 fuel, and $70 upkeep totals $700 — about 18%. Trim a little and you're solidly comfortable.
A stretch: A $650 payment plus $200 insurance, $220 fuel, and $120 upkeep is nearly $1,200 a month — close to a third of that income, which leaves little for anything else.
Common car-buying mistakes
- Shopping by monthly payment instead of total cost.
- Stretching the loan term to make a pricey car “fit.”
- Underestimating insurance for a newer or sportier model.
- Forgetting fuel, tires, and routine maintenance.
Frequently asked questions
How much car can I really afford?
A widely used rule of thumb keeps your total car costs — payment, insurance, fuel, and upkeep — at or below about 15% of your take-home pay, with the loan payment alone near 10%. This calculator checks both.
Why include insurance, fuel, and maintenance?
Because the payment is only part of the story. Insurance, gas or charging, registration, and the occasional repair can add hundreds a month. Ignoring them is the most common way people overspend on a car.
Does a bigger down payment help?
Yes. A larger down payment lowers the amount you borrow, which shrinks the monthly payment and the total interest you pay over the loan.
What about used cars?
The same math applies — just use the real numbers for that car. Used cars often have a lower payment but can carry higher maintenance, so estimate repairs honestly.
Is this financial advice?
No. The results are educational estimates based only on the numbers you enter, and they are not financial, legal, or professional advice.
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Financial disclaimer
This calculator provides general educational estimates only. It is not investment, tax, legal, or professional financial advice, and it does not account for every part of your situation. For decisions that matter, consider speaking with a qualified professional. Read our full financial disclaimer.