Calculate how much car you can afford based on income, expenses, and total cost of ownership.
| Maximum Car Price | $50,531 |
| Down Payment + Trade-In | $3,000 |
| Loan Amount | $47,531 |
| Monthly Payment | $930 |
| Monthly Insurance | $150 |
| Monthly Fuel | $120 |
| Total Monthly Car Cost | $1,200 |
| Total Interest Paid | $8,269 |
| Total Cost of Ownership | $72,000 |
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Max Monthly Car Budget = Gross Monthly Income × 20%
Max Loan Payment = Max Budget − Insurance − Fuel
Max Loan = Payment × [1 − (1+r)^−n] / r
Max Car Price = Max Loan + Down Payment + Trade-In
Where r = monthly interest rate, n = loan term in months.
Using the 20% rule, your maximum monthly car payment should be ~$1,000/month (20% of $5,000 monthly income). This supports roughly a $50,000-55,000 car at 6% APR over 60 months. However, including insurance and fuel, total car costs should stay under $1,200/month.
The 20% rule says your total monthly car expenses (loan payment + insurance + fuel + maintenance) shouldn't exceed 20% of your gross monthly income. Some experts use 15% for a more conservative approach.
A larger down payment reduces your loan principal, resulting in lower monthly payments and less interest paid. Aim for at least 10-20% down. A $5,000 down payment on a $30,000 car at 6% for 60 months saves ~$600 in interest.
As of 2025, average auto loan rates are 5-8% for good credit (700+), 8-12% for fair credit (600-699), and higher for poor credit. Credit unions often offer lower rates than dealerships. Shop multiple lenders before accepting financing.
Shorter terms mean higher monthly payments but less total interest. A $35,000 car at 6% APR: 60 months = $677/mo ($5,620 interest) vs 72 months = $580/mo ($7,760 interest). Never let a lower payment justify a car you can't truly afford.
Beyond the loan payment, budget for: insurance ($100-300/month), fuel ($100-250/month), maintenance ($50-100/month), registration fees, and potential repairs. Total cost of ownership can be 2x the purchase price over 5 years.
Calculations are for educational purposes only. Consult a qualified financial advisor for personalized advice.