Calculator
Biweekly Car Payment Calculator
A biweekly plan pays half your monthly car payment every two weeks. Enter the amount financed, rate, and term to see the biweekly payment, the extra paid each year, the shorter payoff, and the interest saved.
The lowest rates are only available to the most qualified applicants.
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Enter your numbers and press Calculate. Nothing you type leaves your browser.
How this calculator works
A biweekly plan pays half the monthly amount every two weeks. Because a year has 26 two-week periods, that is 13 full payments a year instead of 12.
monthly payment = P × i ÷ (1 − (1 + i)^-n), biweekly payment = monthly payment ÷ 2, and the extra per year equals one monthly payment
- P — the amount financed
- i — the monthly rate, the annual rate divided by 1,200
- n — the number of monthly payments
The extra payment shortens the schedule and cuts the interest, which the tool estimates with the same monthly balance method. Check that your lender applies extra amounts to principal and does not charge a prepayment penalty. Enter the rate you were offered.
What changes your result
Only a few inputs move the number materially. In rough order of impact:
| Input | Effect on the payment | Effect on total cost |
|---|---|---|
| Amount financed | Directly proportional | Directly proportional |
| Interest rate / APR | Directly proportional | Directly proportional |
| Term (months) | Lower payment when longer | Higher total interest when longer |
| Down payment | Lowers the payment | Lowers total interest |
| Trade-in equity | Lowers the amount financed | Lowers total interest |
| Sales tax and fees | Raises the amount financed | Raises total cost |
Enter the rate you were actually offered. This site is not a lender and does not publish rates — a quoted rate is only meaningful next to the term and the amount financed.