First-Car Calculator
Enter your earning profile and driving needs. See what you can actually afford.
The 10% rule for car affordability
Most financial guidance says car payments should not exceed 10–15% of take-home pay. We use 10% for teens because teen income is more variable (hours fluctuate with school schedules), and car costs compound in ways that are easy to underestimate. Insurance, gas, and maintenance can equal or exceed the loan payment itself. Starting with a conservative payment budget leaves room for the costs you cannot avoid.
Total cost of ownership — why sticker price is not the real price
The sticker price of a car is often less than half the total cost of owning it over 4–5 years. Insurance for a teen driver runs $150–$300/month. Gas at 80 miles per week costs $30–$50/month. Maintenance on a used car averages $100/month (oil changes, tires, brakes, repairs). Registration, parking, and incidentals add more. A $6,000 car can easily cost $15,000–$20,000 over 4 years once you add everything up.
Insurance realities for teens
Teen drivers are the most expensive demographic to insure. Statistically, 16–19 year-olds have the highest accident rate of any age group. Insurers price accordingly. Being added to a parent’s policy is roughly half the cost of a standalone policy. The good-student discount (typically 3.0+ GPA) saves about 10%. Every at-fault accident or moving violation increases premiums for 3–5 years.
Insurance costs decrease each year as you age and accumulate a clean driving record. By 25, rates drop substantially. The first few years are the most expensive, which is why insurance dominates the TCO for teen car ownership.
Loan terms: 48 vs 60 vs 72 months
Shorter loans cost less total. An $8,000 car at 10% APR costs about $1,760 in interest over 48 months but $2,760 over 72 months — nearly $1,000 more for the same car. Longer terms also mean you are “upside-down” (owing more than the car is worth) for a longer period, which is a problem if you need to sell.
We show 48, 60, and 72-month options so you can see the tradeoff. The recommendation for a first car: 48 months maximum. If you need 60 or 72 months to make the payment work, the car is too expensive for your current income.
Used vs new for a first car
Used wins on almost every metric. A new car loses 20–30% of its value in the first two years. A 3–5 year old car with 30,000–60,000 miles has already absorbed that depreciation. Insurance is lower on used cars (lower replacement cost). And first cars absorb parking lot dings, curb rash, and learning-to-drive incidents that are much cheaper to accept on an $8,000 car than a $30,000 one.
The sweet spot for a reliable first car is $8,000–$15,000. At that price you can find a well-maintained Honda Civic, Toyota Corolla, or Mazda3 with years of reliable service ahead. Below $5,000, maintenance costs increase and reliability becomes a gamble. Above $15,000, you are paying for features and status that do not help you learn to drive or manage money.
When the answer is “no car”
If total monthly car costs exceed 25% of your take-home pay even with the cheapest viable option, a car is not financially reasonable right now. That is not a failure — it is information. Alternatives: share a parent’s car, use public transit, bike, carpool, or focus on increasing hours/wage before revisiting. A car you cannot afford creates stress and debt that makes everything else harder.
Saving up for a cash purchase
The most financially sound first car is one you buy with cash. No loan means no interest, no risk of being upside-down, and lower insurance (you can carry liability-only instead of full coverage). Saving $200/month for 2 years produces $4,800 plus any interest — enough for a functional, reliable used car. Use our compound interest visualizer to see what consistent saving produces.
Frequently asked questions
Can I buy a car without my parents’ help?
Legally, a minor (under 18) cannot sign a binding contract in most states, which includes auto loans and insurance policies. At 18 you can, but lenders require credit history you likely don’t have yet. Practically, most teen car purchases involve a parent co-signing the loan and holding the insurance policy. A cash purchase avoids the loan issue but not the insurance one.
Should I lease or buy?
Buy. Leases require good credit (which teens don’t have), penalize high mileage, and leave you with no asset at the end. For a first car, buying a reliable used car — preferably with cash — is almost always the better financial decision. You own something, you can sell it later, and you avoid monthly lease payments that never build equity.
What’s wrong with a 72-month loan?
Three things. First, you pay significantly more total interest ($8,000 car at 10% APR: $1,760 interest over 48 months vs $2,760 over 72 months). Second, longer loans mean you’re likely upside-down (owing more than the car is worth) for years. Third, a 6-year commitment is a long time when your life is changing rapidly. If you need 72 months to afford the payment, the car is too expensive.
How much should insurance actually cost for a teen?
Added to a parent’s policy: $150–$300/month depending on state, age, and driving record. On your own policy: $300–$600/month or more. The good-student discount (typically 3.0+ GPA) saves about 10%. Insurance is often the largest ongoing car cost for teens — sometimes exceeding the loan payment.
Is it cheaper to stay on my parents’ insurance?
Almost always yes, substantially. Teen drivers on a parent’s policy pay roughly half what they’d pay for their own policy. The parent’s premium increases, but the per-driver cost is much lower because of the parent’s driving history and multi-car discounts. Stay on the parent policy as long as possible.
What if I get in an accident?
Your insurance premium will increase significantly — often 30–50% for 3–5 years. An at-fault accident as a teen driver is one of the most expensive financial events you can experience at this age. It costs thousands in increased premiums over the surcharge period. This is a genuine reason to drive carefully, not just a safety lecture.
Should I get a new or used car?
Used. A new car loses 20–30% of its value in the first two years. A 3–5 year old car with 30,000–60,000 miles has already absorbed that depreciation hit. Insurance is lower on used cars. And when you inevitably get a door ding in a parking lot, it hurts less on an $8,000 car than a $30,000 one. The $8,000–$15,000 range is the sweet spot for a reliable first car.