Car Loan Calculator
Monthly car loan payment with interest and total cost breakdown.
Calculate fixed monthly car loan payment, total interest, and total paid over the term. Enter car price, down payment, annual rate, and term in months.
What this tool does
Calculates the fixed monthly payment, total interest paid, and total amount paid on a car loan. Enter the car price, down payment, annual interest rate, and loan term in months. The result shows your monthly obligation and the full cost breakdown over the loan life. The monthly payment is driven most strongly by the principal borrowed (car price minus down payment) and the interest rate. A typical scenario might involve comparing how a larger down payment or shorter loan term affects your monthly outlay. The calculation assumes a fixed interest rate that doesn't change and doesn't account for insurance, maintenance, taxes, or registration fees. Results are for illustration purposes and reflect standard loan amortisation mathematics.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
How a car loan payment is calculated
A car loan uses the same standard amortisation math as a mortgage or personal loan. The calculator takes the loan principal — the car price minus the down payment — and applies the monthly interest rate over the term to produce the fixed monthly payment. Each payment covers interest accrued on the outstanding balance plus a chunk of principal; the split shifts over time as the balance falls, but the headline payment amount stays constant for a fixed-rate loan.
How the three levers move the answer
The loan principal — car price minus down payment — has a directly proportional effect on the monthly payment. Doubling the principal doubles the payment at any given rate and term. The interest rate affects both the monthly figure and the total interest paid over the term; even small rate differences compound noticeably over a multi-year loan. Term length has a counterintuitive effect: a longer term lowers the monthly payment but increases total interest, because there are simply more months over which interest accrues.
How the down payment changes the calculation
The down payment reduces the loan principal one-for-one. A larger down payment lowers the monthly payment proportionally and reduces the total interest charged over the term, because both figures scale with the principal. The down payment field can be set to zero to model fully financed scenarios, or raised to compare different cash-versus-finance splits on the same vehicle.
How term length changes total cost
The same loan amount and rate run over different terms produces materially different total cost. A loan amortised over 36 months carries a higher monthly payment but a smaller total interest charge than the same loan over 60 or 84 months. Re-running the calculator at multiple term lengths makes the trade-off visible in concrete figures rather than abstract APR comparisons. Longer terms also mean the loan balance can fall more slowly than the car's depreciating value for parts of the term, which matters if the car might be sold or traded in before the loan is paid off.
What the calculator does not include
Insurance, fuel, maintenance, registration, depreciation, and any sales tax are all costs of owning a car, but none of them appear in the loan calculation. The figures here cover only the financing of the purchase price net of down payment. The down payment itself is part of the buyer's outlay but not part of the loan; combine it with the total paid figure to see the full cash cost of acquiring the vehicle.
How to read the result panel
The primary output is the fixed monthly payment. The secondary outputs break this into the loan principal, the total amount paid across the full term, and the portion of that total that is interest — letting the cost of borrowing be compared directly against the amount borrowed. Adjusting any input recomputes all figures instantly, useful for working through several offers or term lengths in sequence without resetting the form.
A $30,000 car with $3,000 down at 6.5% over 60 mo estimates a monthly payment of 528.29.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
The calculator computes monthly loan payment using the standard amortisation formula. Loan principal equals car price minus down payment. The monthly interest rate is derived by dividing the annual interest rate by 12 and by 100. Monthly payment is then calculated as principal multiplied by the monthly rate factor, adjusted for the loan term in months. Total amount paid equals monthly payment multiplied by the number of months. Total interest paid equals total amount paid minus the original principal. All intermediate calculations use full precision; values are rounded only when displayed. The model assumes a fixed interest rate throughout the loan term, regular monthly payments, and no fees, prepayment penalties, or other costs. It does not account for variable rates, payment holidays, or insurance costs.
Frequently Asked Questions
What interest rate should be entered?
How does the term length affect total interest?
What does a larger down payment do?
Does the calculator include sales tax, fees, or insurance?
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