Car Affordability Calculator
Find out the maximum car price you can afford from your monthly budget, down payment, loan rate, and term.
Car Affordability Calculator
Monthly budget → maximum price
How It Works
The reverse amortization formula solves for loan principal from monthly payment, rate, and term. Adding the down payment gives the maximum affordable vehicle price.
How to Use This Calculator
- Enter the maximum monthly payment you’re comfortable with.
- Enter your available down payment.
- Enter the expected loan interest rate (check current rates from your bank or credit union).
- Enter the loan term in months (48, 60, or 72 are common).
- Click Calculate — your maximum affordable car price appears.
Worked Example
Reference Table
| Monthly Budget | Down Pmt | @ 5% 60mo | @ 7% 60mo | @ 5% 72mo |
|---|---|---|---|---|
| $300 | $2,000 | $17,573 | $17,227 | $20,285 |
| $400 | $3,000 | $24,097 | $23,636 | $27,880 |
| $500 | $3,000 | $28,621 | $28,045 | $33,100 |
| $600 | $5,000 | $36,145 | $35,454 | $40,720 |
| $800 | $5,000 | $46,193 | $45,272 | $52,960 |
Frequently Asked Questions
What percentage of income should I spend on a car payment?
A common guideline is the 20/4/10 rule: 20% down, loan term no longer than 4 years, and total car expenses (payment + insurance + fuel) no more than 10% of gross monthly income. Stricter budgeters target 8%.
Should I get pre-approved for a loan before visiting a dealership?
Yes — pre-approval from your bank or credit union gives you a baseline rate and purchase limit. Dealers may offer manufacturer financing incentives (sometimes 0% promotional APR) that beat bank rates, but pre-approval protects you from inflated dealer financing.
Does a longer loan term make a car more affordable?
It reduces the monthly payment, but you pay significantly more interest and risk being ‘underwater’ (owing more than the car is worth) for the first 2–3 years. Avoid 84-month (7-year) loans for vehicles that depreciate rapidly.
How does my credit score affect the loan rate?
Significantly. Excellent credit (750+) may qualify for 4–5% APR; average credit (650–700) typically sees 8–12%; poor credit may face 15–25%+. On a $25 000 loan over 60 months, the difference between 5% and 12% APR is approximately $4 600 in additional interest.
