New Car vs Used Car Loans: The True Cost Breakdown

The headline isn't APR — it's total ownership cost

A 4.99% loan on a $35,000 new car: total interest over 60 months ≈ $4,640. A 7.49% loan on a $22,000 3-year-old used car: total interest ≈ $4,420.

The interest difference is a wash. The vehicle price is the real lever — and depreciation is the silent third tax most buyers ignore.

The depreciation tax nobody mentions

A new car loses ~20% in year one and ~50% by year five in market value. On a $35k purchase that's a paper loss of $7,000 in 12 months — vastly more than any interest difference between new and used.

When new wins

• You drive 20,000+ miles/year (warranty matters)
• You plan to keep the car 8+ years (depreciation amortizes)
• A 0% APR promo beats your best outside-loan offer without sacrificing the rebate

When used wins (most cases)

• 2–3 year-old "lightly-used" hits the depreciation sweet spot
• Manufacturer CPO programs may qualify for new-car APRs
• You can pay cash for a $15k used car instead of financing a $35k new one

Run the math both ways

Use our auto loan calculator with both scenarios. Compare not just monthly payment, but 5-year total cost of ownership (purchase + interest + insurance + maintenance + depreciation).

For most buyers, a 2-year-old used car with 30k miles and a clean Carfax beats a new vehicle by $5,000–$8,000 over a 5-year hold.

Bottom line

The APR gap between new and used (1–2 points) is dwarfed by the depreciation gap. Used wins for most buyers. New wins for high-mileage drivers, long-term keepers, and anyone with a real 0% APR offer plus a cash rebate.