Buying basics · 12 min read
Your first car purchase is one of the biggest financial decisions you will make early on. The average new car now costs over $50,000, so mistakes are expensive. This guide walks you through the entire process — from setting a budget to driving off the lot — so you buy with confidence instead of regret.
Updated October 2026 · By the CARC research team
The widely used 20/4/10 rule is a good starting point: put at least 20% down, finance for no more than 4 years, and keep total car expenses (payment, insurance, fuel, maintenance) under 10% of your gross income.
Do not shop by monthly payment alone. Dealers can stretch a loan to 84 months to make any price "affordable" — you will pay thousands more in interest and spend years owing more than the car is worth.
Your credit score determines your interest rate. Check it for free before visiting any dealer so you know what rate you deserve. If your score is below 670, consider a larger down payment or a less expensive car to offset the higher rate.
Get pre-approved for an auto loan from your bank or credit union first. Walking in with financing in hand turns you from a payment buyer into a cash buyer — and removes the dealer's biggest profit lever.
New cars lose roughly 20% of their value in the first year. A 2–3 year old car with low miles gives you modern safety tech at a steep discount — and someone else ate the depreciation.
That said, new cars come with full warranties, the latest driver-assistance features, and sometimes promotional 0% financing that can make the math closer than it looks. Run both scenarios.
Insurance, fuel, and maintenance vary wildly between models. A cheap sports car can cost more per year to insure than a midsize SUV that costs $10,000 more. Get insurance quotes before you fall in love with a car.
Use CARC's valuation and cost tools to see fair prices and ownership costs side by side before you visit a dealer.
Negotiate one number: the total out-the-door price including all fees and taxes. Ignore monthly-payment talk until the price is settled.
Get quotes from at least three dealers by email. Competition is your leverage — the dealer that wants your business most will show it in writing.
In the finance office, you will be offered extended warranties, paint protection, and gap insurance. Most are overpriced — you can almost always buy them cheaper elsewhere or skip them entirely.
Verify the interest rate, loan term, and total financed amount match what you agreed to. Mistakes (and worse) happen in paperwork.
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