What this scenario helps you see
A larger deposit lowers principal and interest, but using every available dollar can make the first unexpected repair difficult. Decide what cash remains after the purchase before treating a larger down payment as automatically better.
Price, amount financed, and total loan payments are different figures. This example finances $20,000, not the whole $25,000 sticker price. Taxes, title, optional products, and negative trade equity increase principal when financed.
Compare a shorter term at the same deposit, then test extra payments on the original term. A voluntary extra payment may offer flexibility, but check whether your contract permits principal-only application without a charge.
Test a different rate
| Annual interest | Monthly payment | Total interest |
|---|---|---|
| 5% | $377.42 | $2,645.52 |
| 7% | $396.02 | $3,761.48 |
| 9% | $415.17 | $4,909.99 |
Method and limitations
The model uses fixed monthly amortization: M = P × r ÷ (1 − (1 + r)^−n), with principal P, monthly rate r, and n payments. At zero interest, payment is P ÷ n. Interest and payments are rounded monthly, and the last payment reconciles the balance. See the complete loan methodology for assumptions and sources.
Daily-interest contracts, prepaid finance charges, late payments, and lender rules can produce a different result. This page is an educational example, not a rate quote or approval. CFPB explains loan terminology and disclosures.
Questions about this example
Is the loan amount $25,000 in this example?
No. The car costs $25,000 and the example deposit is $5,000, so the initial amount financed is $20,000 before added costs.
How does another $1,000 down change the result?
It reduces the financed balance by $1,000 when other inputs stay fixed. Save the current result as scenario A, increase the deposit, and compare the payment and interest.
Should I finance taxes and fees?
Financing them increases borrowing cost. Compare both cash flow and remaining reserves, and use the financed-fee input only for charges actually added to the loan.