If you have ever wondered “how much car can I afford?”, this free calculator answers it by starting from your monthly budget rather than a sticker price. Enter your income or a fixed budget, your running costs for insurance, fuel, and maintenance, plus your down payment, loan rate, and term. In seconds you will see the maximum car price you can comfortably reach, your monthly payment, total interest, and whether your plan passes the well-known 20/4/10 rule. No signup required.
The 20/4/10 rule caps total car costs at 10% of income. 15% is a common stretch — lower it to stay safe.
Insurance, fuel, and maintenance often take 25–40% of a car budget. Adjust to your situation.
Cash plus any trade-in value you can put toward the car up front.
Typical new-car rates run 6–8%; used-car rates are higher. Check your pre-approval.
Shorter terms cost less interest. The 20/4/10 rule caps this at 48 months.
You can afford a car around
$29,513.55
Financing $26,513.55 over 60 months, plus $3,000.00 down.
Max monthly loan payment
$525.00
Max loan amount
$26,513.55
All-in monthly cost
$750.00
payment + running costs
Total loan interest
$4,986.45
Safer 10%-of-income guideline price
$20,675.70
Keeping total car costs at or under 10% of your income.
At least 20% down
Your down payment is 10.16% of the car price
Term of 4 years or less
You picked 60 months
Total car costs under 10% of income
Your all-in cost is 15% of income
A car that fully follows 20/4/10 (10% budget, 48 months, 20% down) comes to about $18,270.09.
Set a car-buying budget in Auritrack and track your down-payment savings, running costs, and loan payments in one place — so the number you see here is the number you actually stick to.
Try Auritrack FreeChoose "From income" to base your budget on a share of your take-home pay, or "Set a budget" to enter a fixed monthly amount you can put toward a car. This is the all-in figure covering the loan payment plus running costs.
Enter insurance, fuel, and maintenance as either a percentage of your budget or a fixed monthly amount. These costs come out first, so the loan only uses what is genuinely left over.
Add the cash plus any trade-in value you can put toward the car up front. A larger down payment increases the total car price you can reach and helps you meet the 20% target in the 20/4/10 rule.
Enter your loan APR (typical new-car rates run 6-8%, used-car rates are higher) and pick a term of 36, 48, 60, or 72 months. Shorter terms cost less interest but raise the monthly payment.
Instantly see the maximum car price, loan amount, monthly payment, all-in cost, and total interest. Check the 20/4/10 rule panel to see whether your plan is on track or stretched, and compare against the safer 10%-of-income guideline price.
Most car shopping starts backwards. You fall for a specific model, find out the monthly payment, and then try to convince yourself it fits. A better approach is to start from what your budget can genuinely absorb and work toward a price from there. That is exactly what this calculator does. It takes your all-in monthly budget, subtracts the running costs of owning a car, and only then works out how large a loan the leftover payment can support. Add your down payment and you have a realistic ceiling on the price. A widely used shortcut is to keep the purchase price under roughly 35% of your gross annual income and total monthly car costs at or below 10% of your take-home pay. Someone earning $50,000 a year, for example, would look at cars priced around $17,500 or less. Those are guidelines, not laws, but they keep the car from quietly eating the budget you need for rent, savings, and everything else. If you already know the price of a car and want the payment instead, our auto loan calculator runs the math in the opposite direction.
The 20/4/10 rule is the most repeated piece of car-buying advice for a reason: it is easy to remember and it protects you from the three most common mistakes. Put at least 20% down, so you are not immediately underwater on a depreciating asset. Finance for 4 years (48 months) or less, so you are not paying interest long after the new-car feeling has worn off. And keep total monthly vehicle costs at or under 10% of your gross income, so the car leaves room for everything else. The calculator above checks each pillar against your actual numbers and flags whether you are on track or stretched. If you fail one, the fix is usually a bigger down payment, a shorter term, or simply a cheaper car. Stretching a loan to 72 or 84 months to hit a lower payment is tempting, but it almost always means paying more interest and staying upside-down on the loan for years.
The loan payment is only part of what a car costs each month. Insurance, fuel, and maintenance can easily add $300 to $600, and they scale with the car you choose. A faster, heavier, or more expensive vehicle usually costs more to insure and more to fill up, and once a warranty lapses, repairs land squarely on you. This is why the calculator subtracts running costs before it sizes your loan: a $600 monthly budget with $250 of running costs only supports the loan a $350 payment can carry, not $600. Buyers who skip this step routinely overshoot and feel the squeeze within a few months. Budget realistically for insurance quotes in your area, your expected mileage and fuel prices, and a maintenance cushion, then fold the total into your overall monthly budget plan so the car sits comfortably alongside your other commitments.
Depreciation is the single largest cost of owning a new car, and it is invisible on the monthly statement. A new vehicle typically loses about 20% of its value in the first year and roughly 60% over five years. That means a $35,000 car can be worth around $14,000 by year five, and most of that drop happens early. Buying a lightly used car two to three years old lets the first owner absorb the steepest part of that curve while you get a vehicle that is often mechanically almost new. Used cars also carry lower insurance costs and lower sticker prices, though they usually come with higher loan rates and a bit more maintenance risk. New cars cost more up front but include warranties, the latest safety features, and predictable early repair bills. Neither is universally right — run both as separate scenarios in the calculator and compare the true all-in monthly cost, not just the payment, before you decide.
Dealers are experts at steering the conversation toward the monthly payment because a small number feels affordable even when the total is not. The classic trap is the long loan: stretching to 72 or 84 months drops the payment but balloons the interest and keeps you owing more than the car is worth for years. Watch for negative equity being rolled from a previous loan into a new one, add-ons like extended warranties and paint protection padded into the financed amount, and a quoted APR that is higher than what your credit deserves. Get pre-approved by your own bank or credit union first so you have a rate to beat and can negotiate the car price separately from the financing. High monthly car costs also inflate your debt-to-income ratio, which can make it harder to qualify for a mortgage or other loans later. When in doubt, a shorter term on a cheaper car almost always beats a longer term on an expensive one.
Estimate your monthly car payment with trade-in, down payment, sales tax, and dealer fees, plus the total interest you will pay.
Calculate monthly loan payments, view amortization schedules, compare loan options, and model extra payment savings.
Describe your situation and let AI build a personalized monthly budget instantly. Or do it yourself with the 50/30/20 rule, custom ratios, or zero-based budgeting.
Calculate your DTI ratio instantly. See your front-end and back-end ratios and learn which debts to cut to qualify for a loan or mortgage.
Buy Within Your Means
Auritrack helps you set a car-buying budget, track your down-payment savings, and keep your loan payment, insurance, fuel, and upkeep in one place — so the number you plan for is the number you actually stick to. Free to start.
Disclaimer: This tool is provided for informational and educational purposes only. It does not constitute financial, tax, investment, or legal advice. Results are estimates based on the inputs you provide and may not reflect actual financial outcomes. Always consult a qualified financial professional before making financial decisions.
