Calculator accuracy
Methodology and assumptions
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
FormulaAffordable loan amount = present value of payment budget; vehicle price = (loan amount + down payment + trade-in - fees) / (1 + sales tax rate)
Inputs usedMonthly budget, Insurance and maintenance, Down payment, Trade-in, APR and term
LimitationsResults are estimates for quick planning and should be checked before important financial, legal, tax, health, or business decisions.
Last reviewedMay 25, 2026
Cite this pageToolkit Shelf. Car Affordability Calculator. Retrieved May 25, 2026, from https://toolkitshelf.com/tools/car-affordability-calculator