How is the monthly car payment calculated?
We use the standard amortization formula: PMT = r×PV / (1 − (1+r)−n), where PV is the amount financed, r is the monthly rate (APR÷12), and n is the number of months. If APR is 0, payments are simply PV÷n.
Do rebates reduce sales tax?
Often yes. This calculator lets you toggle whether sales tax is applied after trade‑in and rebates (typical in many U.S. states). Confirm with your local DMV rules.
What about negative equity on a trade‑in?
If you owe more than your trade‑in is worth, the difference is added to the amount financed. Enter both trade‑in value and amount owed.
Can I export or share the results?
Yes. Use Export CSV for the amortization, and the Share button to copy a link with your numbers embedded.