Auto Loan Vs Home Equity Loan Calculator This calculator will help you to decide whether you should finance your car using an auto loan or using a home equity loan. Auto Loan Vs. Home Equity Loan Calculator Purchase price of car ($): Down payment amount ($): Loan term (# of months): Auto loan interest rate (%): Home equity loan interest rate (%): Home equity loan upfront costs ($ total of fees, points, ect): Your combined state and federal tax rate (%): Your savings interest rate (%): Results Auto Loan Home Equity Loan Monthly payment: Total interest cost: Tax savings: