Car Loan vs Personal Loan: Which Is Cheaper?

The short answer

Auto loans almost always win on rate (typically 1–4 percentage points lower) because the car serves as collateral. Personal loans win for unusual situations: buying a very old vehicle, private-party sales, or when bad credit blocks auto financing. Once you've picked which option applies, use the auto loan calculator or the loan calculator to model your exact payment and total interest.

Side-by-side comparison

• Rates (good credit): Auto 5–8%, Personal 8–12%
• Rates (fair credit): Auto 9–14%, Personal 14–22%
• Term: Auto 36–84 months, Personal 24–60 months
• Collateral: Auto = the car itself; Personal = unsecured
• Approval speed: Auto = at the dealer; Personal = 1–3 days online
• Down payment: Auto often requires 10–20%; Personal none

When auto loans win

• Buying from a dealer (new or used)
• Vehicle is under 8–10 years old
• You have decent credit (660+)
• You want the longest possible term to minimize monthly payment
• You qualify for manufacturer 0% APR promotions

When personal loans make sense

• Private-party purchase (auto loans for these are limited and often higher-rate)
• Buying a 10+ year old vehicle (most lenders cap auto loans by age)
• Bad credit auto loans are predatory in your area (~20%+ APR)
• You're buying a project car, motorcycle, RV, or kit car
• You don't want a lien on the vehicle

Real cost example: $20,000 car

Option A — Auto loan, 6% APR, 60 months

Monthly payment: $387. Total interest: $3,200.

Option B — Personal loan, 11% APR, 60 months

Monthly payment: $435. Total interest: $6,100. Costs $2,900 more.

Option C — Auto loan, 9% APR (subprime), 72 months

Monthly payment: $361. Total interest: $5,990. Lower payment, but the car may depreciate faster than you pay it down.

What about 0% dealer financing?

Manufacturer 0% APR offers are real but usually require excellent credit (740+) and rule out cash rebates. Always run the math: a $2,000 cash rebate often beats 0% over the life of the loan.

Tips before signing

1. Get pre-approved with your bank/credit union before visiting the dealer
2. Negotiate the car price separately from financing
3. Compare APR, not monthly payment (long terms hide expensive loans)
4. Avoid loans longer than 60 months unless absolutely necessary
5. Make a 10–20% down payment to avoid being underwater
6. Skip dealer add-ons (extended warranty, GAP, paint protection) unless researched

Use the calculator