Auto Loan vs Home Equity Calculator

A home equity loan can offer a lower interest rate than a traditional auto loan, which may reduce your monthly payment and total interest paid. However, using your home as collateral means you risk foreclosure if you can't make payments. It's best to compare both options carefully, factoring in rate differences, loan terms, and the risk to your home.

Auto loans are secured by the vehicle itself rather than your home, so your house is never at risk. They also typically close faster and involve less paperwork than home equity loans. For buyers who value keeping their home equity intact, an auto loan is generally the safer financing route.

Generally, no. The Tax Cuts and Jobs Act of 2017 limited the home equity interest deduction to loans used to buy, build, or substantially improve the home securing the loan. Using a home equity loan to purchase a vehicle typically does not qualify for a tax deduction. Always consult a qualified tax advisor for guidance specific to your situation.

Shorter loan terms (24–48 months) mean higher monthly payments but significantly less total interest paid. Longer terms (60–84 months) lower your monthly payment but increase the total cost of the loan. Most financial experts recommend the shortest term whose payments you can comfortably afford.

Both loans use the standard amortization formula: M = P × [r(1+r)^n] / [(1+r)^n − 1], where P is the loan principal (vehicle price minus down payment), r is the monthly interest rate, and n is the number of monthly payments. The calculator applies this formula to both your auto loan and home equity loan inputs.

Your home serves as collateral, so missing payments could result in foreclosure — a far more serious consequence than a vehicle repossession. Cars also depreciate quickly, which means you could owe more on your home equity loan than the car is worth if you need to sell. This mismatch between asset value and loan balance is a significant financial risk.

Yes. A home equity loan adds to your total mortgage debt and reduces your available equity. This can affect your loan-to-value ratio if you want to refinance your primary mortgage. When selling your home, the home equity loan balance must be paid off at closing, which reduces your net proceeds.

Home equity loans generally carry lower interest rates than auto loans because they are secured by real estate, which lenders consider lower-risk collateral than a depreciating vehicle. However, the rate advantage can be offset by longer repayment terms and the potential loss of a tax deduction, so it's important to compare total costs rather than rates alone.