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Car Loan Calculator

Monthly payments, total cost, max budget and lease vs buy comparison

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Loan amount$0
Total paid$0
Total interest$0
Down + trade-in$0
Loan Amount
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Monthly
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Total Interest
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Total Cost
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Total Monthly Cost
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All ownership costs
Loan payment$0
Insurance$0
Fuel$0
Maintenance$0
5-year total cost$0
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Max Vehicle Price
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At your payment budget
Max loan amount$0
Down + trade-in$0
Lease Terms
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Buy Terms
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🔑 Lease
Monthly payment$0
Total paid$0
Asset owned at end$0
Net cost$0
🏦 Buy
Monthly payment$0
Total paid$0
Asset owned at end$0
Net cost$0

How to Calculate Car Loan Payments

Buying a car is the second-largest purchase most people make. Understanding your actual monthly payment — factoring in the vehicle price, down payment, trade-in value, interest rate, and loan term — prevents dealership surprises and helps you negotiate from a position of knowledge.

This calculator goes beyond just the payment: it shows total interest cost, total ownership cost including insurance and fuel, the maximum vehicle you can afford given a monthly budget, and a clear financial comparison between leasing and buying the same vehicle.

Car Loan Formula

Loan Amount = Vehicle Price − Down Payment − Trade-In Value
Monthly Payment = Loan × [r(1+r)^n] / [(1+r)^n − 1]
Example: $32,000 car, $5,000 down, $3,000 trade-in → $24,000 loan at 6.5% APR / 60 months = $469/month

The 20/4/10 Rule

Put 20% down, finance for no more than 4 years, and keep all car costs under 10% of gross monthly income. This rule protects you from being underwater on your loan and keeps your budget healthy.

When to Use This Calculator

Use this calculator at every stage of the car-buying process — not just when you're about to sign. Here are the key decision points where it provides the most value:

  • Before visiting a dealership: Know your maximum vehicle price before you walk in. Dealers use payment confusion to upsell — knowing your numbers makes you immune.
  • Evaluating loan pre-approvals: Compare your bank's rate vs. dealer financing. On a $25,000 loan, 1% lower APR saves over $600 in total interest on a 60-month term.
  • Lease vs. buy decision: If you drive under 12,000 miles/year and value new-car reliability, leasing can cost less over a 3-year window. The Lease vs. Buy tab shows the net cost difference with your exact numbers.
  • Refinancing existing auto loan: If your credit score improved since you bought your car, use the calculator to see how much refinancing at a lower rate would save.

Step-by-Step Payment Calculation

Vehicle: $32,000 | Down payment: $5,000 | Trade-in: $3,000 | APR: 6.5% | Term: 60 months

Step 1 — Loan amount: $32,000 − $5,000 − $3,000 = $24,000
Step 2 — Monthly rate: 6.5% ÷ 12 = 0.5417% (0.005417)
Step 3 — Payment = $24,000 × [0.005417 × (1.005417)^60] / [(1.005417)^60 − 1] = $469/month
Step 4 — Total paid: $469 × 60 = $28,140 | Total interest: $28,140 − $24,000 = $4,140

Extending to 72 months drops payments to ~$401/month but increases total interest to ~$4,872 — an extra $732 for lower payments.

Frequently Asked Questions

How do I calculate monthly car loan payments? ▼
First find the loan amount: Vehicle Price − Down Payment − Trade-In Value. Then apply the amortization formula: M = Loan × [r(1+r)^n] / [(1+r)^n − 1], where r = monthly rate (APR ÷ 12), n = months. On a $24,000 loan at 6.5% for 60 months → $469/month.
Is it better to lease or buy a car? ▼
Leasing has lower monthly payments and lets you upgrade every 2–3 years, but you own nothing at the end. Buying costs more monthly but builds equity. Long-term, buying is cheaper if you keep the car past the loan payoff. Lease if you value low payments, new cars every few years, and drive under 12,000 miles/year. Buy if you want to own the asset outright.
What is a good interest rate for a car loan? ▼
With excellent credit (720+): new car APR can be 4–6%, used car 6–8%. Good credit (660–719): 6–9% new, 9–12% used. Fair credit (below 660): rates of 12–20%+ are common. Credit unions typically offer the lowest rates. Always get pre-approved before visiting a dealership — it gives you negotiating power.
How does trade-in value affect my car loan? ▼
Trade-in value reduces your loan amount dollar-for-dollar. A $5,000 trade-in on a $30,000 car means you only finance $25,000 (minus down payment). This reduces monthly payments and total interest. Get quotes from CarMax, KBB Instant Cash Offer, and Carvana before negotiating with the dealership — they often compete, driving up your offer.
What loan term should I choose for a car? ▼
36 months: highest payments, least interest. 48 months: balanced. 60 months: most common, reasonable. Avoid 72–84 months — cars depreciate faster than you pay down the loan, leaving you "underwater" (owing more than it's worth). If you need 84 months to afford a car, the car is too expensive for your budget.
How much car can I afford on my salary? ▼
The 20/4/10 rule: 20% down, 4-year max loan, all car expenses (payment + insurance + gas) under 10% of gross monthly income. On $6,000/month: max $600 for all car costs. A more liberal approach: car payment under 15% of take-home pay. Either way, the vehicle price shouldn't exceed half your annual salary.
What happens if I miss a car loan payment? ▼
Missing a payment triggers a series of consequences: (1) Late fee — typically $25–$50 or 5% of the payment. (2) Credit score damage — reported to bureaus after 30 days, can drop score 60–110 points. (3) Default risk — most lenders consider a loan in default after 60–90 days. (4) Repossession — lenders can repossess your vehicle without notice in most states once in default. Contact your lender immediately if you anticipate trouble; many offer hardship deferment programs.
Is buying a car outright better than financing? ▼
Paying cash eliminates interest entirely and reduces total cost. However, financing can make sense when: (1) Loan interest rate is low (under 3–4%) and your money earns more invested elsewhere. (2) You want to preserve liquidity for emergencies. (3) Building credit history. On a $30,000 car at 6% for 60 months, you pay $2,995 in interest — financing costs you real money. If you can comfortably pay cash and the rate is above 5%, paying cash is usually smarter.
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