Used Car Loan Calculator

Estimate monthly payments on a used car loan. Free used car loan calculator.

A used car loan calculator estimates the monthly payment and total interest on financing for a pre-owned vehicle. Used-car loans work like new-car loans (fixed rate, fixed term, simple-interest amortization) but typically carry higher rates and shorter maximum terms, because the collateral is older and depreciating. This calculator applies the standard amortization formula to the amount you are financing (price minus down payment or trade-in) so the payment matches what a lender would quote.

Use it to budget a used-car purchase before you shop, or to compare dealer financing against a credit union pre-approval. Because used-car rates are higher and terms shorter, run scenarios at 48 and 60 months to see the payment-versus-interest trade-off, and test a larger down payment to see how much interest it cuts. The numbers run locally in your browser.

price

loan

Result

304.15

Breakdown

Loan Amount
15,000
Total Interest
3,249

About Used Car Loan Calculator

What is used car loan calculator?

A used car loan calculator estimates the monthly payment and total interest on financing for a pre-owned vehicle. Used-car loans work like new-car loans (fixed rate, fixed term, simple-interest amortization) but typically carry higher rates and shorter maximum terms, because the collateral is older and depreciating. This calculator applies the standard amortization formula to the amount you are financing (price minus down payment or trade-in) so the payment matches what a lender would quote. Use it to budget a used-car purchase before you shop, or to compare dealer financing against a credit union pre-approval. Because used-car rates are higher and terms shorter, run scenarios at 48 and 60 months to see the payment-versus-interest trade-off, and test a larger down payment to see how much interest it cuts. The numbers run locally in your browser.

How to use this calculator

  1. Enter your vehicle price.
  2. Enter your down payment.
  3. Enter your trade-in value.
  4. Enter your interest rate.
  5. Enter your loan term.
  6. Click the "Calculate" button.
  7. View your result instantly — the main result is displayed prominently at the top with a detailed breakdown below it.

When to use this calculator

  • Budgeting a used-car payment before shopping a dealer or private sale
  • Comparing dealer financing against a credit union pre-approval
  • Testing 48 versus 60-month terms on payment and total interest
  • Seeing how a higher used-car APR affects total cost
  • Checking how a larger down payment reduces interest paid

How the calculation works

Used-car loans amortize with the standard installment formula: M = P x [r(1+r)^n] / [(1+r)^n - 1], where P is the amount financed (price minus down payment), r is the monthly rate (APR / 12), and n is the term in months. Total interest = (M x n) - P. For example, a $20,000 used car at 8% APR over 60 months with $0 down: r = 0.006667, n = 60, M = 20,000 x [0.006667 x (1.006667)^60] / [(1.006667)^60 - 1] ~= $406 per month. Total paid ~= $24,360, total interest ~= $4,360. A $4,000 down payment drops the payment to about $324 and total interest to roughly $3,490.

Frequently Asked Questions

What is a good interest rate for a car loan?▼
Rates vary by credit score and whether the car is new or used. As of recent years, excellent credit often qualifies for under 6% APR.
Should I put money down on a car?▼
A down payment of at least 20% on a new car reduces monthly payments, total interest, and helps avoid being upside-down on the loan.

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