Car Payment Calculator
See the full deal—not just the monthly payment. Compare prices, terms, rates, and trade-in scenarios.
Verify this calculatorVerified
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Monthly payment = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1], where P is the amount financed, r is the monthly interest rate, and n is the number of payments. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Verified
- Source review
- September 12, 2026
Car Payment calculator
The complete payment depends on the out-the-door price, net trade equity, cash down, APR, and term—not the vehicle price alone.
- Use the negotiated selling price.
- Separate trade value from payoff.
- Include taxable add-ons and official fees.
Optional readingLearn how this calculator works
How the car payment calculator works
Estimate your monthly car payment, amount financed, taxes, total interest, and the effect of your trade-in.
Monthly payment = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1], where P is the amount financed, r is the monthly interest rate, and n is the number of payments.
Read our calculation methodology and limitations.
Read the payment like a complete vehicle deal
A monthly payment is useful only when the selling price, trade, taxes, products, fees, and loan structure reconcile.
Compare the same structure
Keep the down payment and term equal when comparing quotes. Otherwise a lower payment may simply reflect more cash upfront or more months of interest.
Audit the amount financed
Match the financed balance to the buyer’s order: vehicle price, eligible trade credit, payoff, taxable products, government fees, dealer fees, rebates, and cash down.
Stress-test the term
Review both payment and total interest at a shorter term. If the shorter option is unaffordable, reconsider the vehicle price before stretching the loan.
Example
A $38,000 vehicle with $5,000 down, a $3,000 net trade-in, 6.5% APR, and a 60-month term produces a payment based on the financed balance after tax and fees.
What affects the result
- A larger down payment reduces both the financed balance and total interest.
- Longer terms lower the monthly payment but usually increase total interest.
- Negative trade equity is added to the new loan and can raise both payment and risk.
Helpful guides
Frequently asked questions
Does the estimate include sales tax?
Yes. Sumvoro applies the entered sales-tax rate to the taxable vehicle amount. Local rules on trade-in credits vary, so confirm with your state or dealer.
What is net trade equity?
It is your trade-in value minus the amount still owed. A negative result increases the new amount financed.
Is an 84-month car loan a good idea?
It can reduce the monthly payment, but it increases total interest and the risk of owing more than the vehicle is worth.