Calculate your car loan monthly payment with down payment and balloon options — then compare two loan offers side by side to find the true cheapest deal.
Balloon payment: a lump sum due at the end of the loan — it lowers monthly payments but must be paid (or refinanced) at the end.
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Loan amount = car price − down payment − trade-in. The monthly payment uses the standard amortization formula. A balloon payment is subtracted from the financed amount but added back as a final lump sum.
Payment = P × r(1+r)^n ÷ ((1+r)^n − 1), where P is the loan after down payment, r the monthly rate, n months. The calculator above does it instantly.
20% is the classic guideline — smaller loan, less interest, no negative equity. Aim for at least 10%.
It lowers monthly payments but costs much more in total interest. Compare both offers above to see the true cost.
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The interest is genuinely zero, but 0% deals usually replace cash rebates — so you may pay a higher sticker price than a cash buyer would. Compare the 0% offer's price against the discounted price you'd get with a normal loan to find the true cost before celebrating.
Private sales typically fetch 10–20% more than trade-in offers, but trading in is instant and reduces the taxable purchase price in many places. If the price gap is small and convenience matters, trade-in wins; if you need every dollar, sell privately.
Yes — every extra dollar of principal skips all future interest that dollar would have accrued. Even $50 extra per month on a five-year loan can shave off several months and save hundreds in interest, as long as your loan has no prepayment penalty.
Car loans amortize: every monthly payment first covers that month's interest charge, and only the remainder reduces your principal. That's why early payments feel interest-heavy and later ones are mostly principal — the interest is always computed on the remaining balance, which shrinks over time.
The payment formula: payment = P × r(1+r)n ÷ ((1+r)n − 1), where P = amount borrowed (price minus down payment and trade-in), r = annual rate ÷ 12, and n = number of months. Total interest = payment × n − P.
Worked example: borrow $20,000 at 6% APR for 60 months. Monthly rate r = 0.06 ÷ 12 = 0.005; (1.005)60 ≈ 1.3489. Payment = 20000 × 0.005 × 1.3489 ÷ (1.3489 − 1) = 20000 × 0.019333 ≈ $386.66/month. Total paid = 386.66 × 60 ≈ $23,200, so the loan costs about $3,200 in interest — money a bigger down payment or shorter term would have saved.
Practical tips: compare loans by APR and total interest, never by monthly payment alone — dealers stretch terms to make expensive loans look cheap. A 20% down payment avoids owing more than the car's value. Limitation: the math covers principal and interest only; insurance, registration, dealer fees, and taxes are extra costs the calculator doesn't include.
Inside the amortization schedule: on that $20,000 / 6% / 60-month loan, the first $386.66 payment splits into $100.00 interest (20000 × 0.005) and only $286.66 principal — you're paying 26% interest in month one. By month 30 the split is roughly $58 interest / $329 principal; the final payment is nearly all principal. This front-loading is why selling or refinancing early saves less than people expect — you've already paid the heaviest interest. Watch for precomputed-interest loans (rare now, still legal in some US states under the "Rule of 78s"), where early payoff doesn't refund interest fairly — always confirm your loan uses simple-interest amortization with no prepayment penalty. And remember the payment math assumes monthly compounding from day one; dealers who quote "biweekly payments" are really just collecting 26 half-payments (13 full payments/year), which shortens the loan — a legitimate trick you can replicate yourself with one extra payment annually.