The idea has real appeal: mortgage rates are often lower than auto loan rates, and simplifying your finances sounds great on paper. But there's a catch — you're turning short-term debt into long-term debt secured by your home.
Whether this move makes sense depends on your equity, your current rate, how long you'd stretch the payments, and honestly, your own financial discipline. Let's break it down.
Key Takeaways
- Cash-out refinance converts short-term auto debt into decades-long mortgage debt
- Lower rates help, but longer terms and closing costs can erase the savings
- Only consider it for high-rate auto loans or urgent cash-flow pressure
- Compare full amortization schedules and consult a mortgage advisor before deciding
What Does It Mean to Refinance Your Mortgage to Pay Off a Car?
A cash-out refinance replaces your current mortgage with a new, larger one. You take the difference in cash at closing and can use it to pay off your auto loan.
Here's a simple walkthrough:
- Home value: $400,000
- Current mortgage balance: $220,000
- New refinance amount: $260,000
- Cash received at closing: $40,000 (used to pay off the car loan)
That $40,000 is added to your mortgage principal, so you pay mortgage interest on it for the remaining term—often 15 to 30 years.
Equity Requirements Matter
Lenders won't let you cash out 100% of your home's value. Freddie Mac guidelines cap loan-to-value at 80% for a primary residence, so you generally must keep at least 20% equity after closing (Freddie Mac guide section 4203.1).
Two-to-four-unit properties and investment homes usually require even more equity retained, and limits can vary by property type.
If you only want a lower payment and no cash out, a rate-and-term refinance is usually the better path. Cash-out also isn't the same as other equity products:
- Rate-and-term refinance: Replaces your mortgage; no cash back
- HELOC or home equity loan: Second lien on top of your existing mortgage
- Cash-out refinance: Replaces the mortgage and pays you the difference in cash
ClearPoint Mortgage Advisors can help you compare cash-out refinance with HELOCs and home equity loans, including FHA and VA cash-out options when you qualify.
Pros and Cons of Rolling Your Car Loan Into Your Mortgage
The Case For It
- Lower rates in some environments. In Q1 2026, used-car auto loans averaged 11.43% (Experian) versus about 6.84% for 30-year refinance rates—a gap that can matter on paper.
- One payment, less mental load. Consolidating debt into your mortgage simplifies your monthly budget.
- Cash freed up elsewhere. Paying off the auto loan can drop a high-rate payment and ease short-term cash flow if the refinance math works.
The Case Against It
- Depreciating asset, home equity at risk. Your car loses value every year; your home generally does not. Tying car debt to the house rarely makes long-term sense.
- Closing costs add up. Refinance costs often run about 3–6% of the loan amount: on a $260,000 refinance, that's roughly $7,800 to $15,600 upfront.
- Far longer repayment term. Stretching a 3–5 year car loan across 15–30 years can cost more in total interest even when the rate is lower.
Here's the uncomfortable truth: a lower rate doesn't automatically mean lower total cost. Term length matters just as much.
The IRS qualifying-use test only allows mortgage interest deductions when funds buy, build, or improve the home. Cash-out proceeds used to pay off a car do not meet that test, per IRS Publication 936. Don't count on the deduction—confirm with a tax professional if your situation is more complex.
When Does This Move Actually Make Sense (and When Doesn't It)?
Context matters more than the headline rate difference. Here's when it can genuinely help:
- You just took out the car loan. Early payments go mostly to interest rather than principal, per the Consumer Financial Protection Bureau. A lower-rate refinance in this window can save real money.
- You plan to sell your home soon. If you're moving in a couple of years, you limit the long-term cost of stretching that debt out.
And here's when it usually backfires:
- Your car loan is nearly paid off. Most of your remaining payments are already going toward principal, so refinancing costs would likely exceed any interest savings.
- You keep taking on new debt afterward. Consolidating once, then racking up more balances, erodes your home equity and increases financial risk.
Before committing, run the actual numbers. Compare the full amortization schedule of your current auto loan against a projected refinance schedule, factoring in closing costs and the new term length.
ClearPoint Mortgage Advisors can walk through your specific loan details to help you determine whether the math works in your favor, not just whether the headline rate looks better.
Comparing Auto Loan Rates to Mortgage Rates
The rate gap between auto loans and mortgages shifts constantly with market conditions. As of Q1 2026, Experian reported these average auto loan rates by credit tier:
| Credit Tier | New-Car APR | Used-Car APR |
|---|---|---|
| Super prime (781+) | 4.55% | 6.30% |
| Prime (661-780) | 6.23% | 8.77% |
| Near prime (601-660) | 9.67% | 14.03% |
| Subprime (501-600) | 13.44% | 19.42% |
Compare that to mortgage rates by credit score, per Experian's mortgage rate data:
| FICO Score | 30-Year Mortgage Rate |
|---|---|
| 620 | 7.46% |
| 700 | 7.01% |
| 760 | 6.80% |
| 800+ | 6.73% |
Your credit score determines where you land on either range. Excellent credit can put a new-car APR below today's mortgage rates. Fair or subprime credit often means auto rates several points higher than a mortgage.
Rate is only half the math, though. Even when the mortgage rate is lower, spreading a car balance across 25 extra years can mean paying more total interest than keeping the original auto loan.
Alternatives to Consider Before Refinancing
A full mortgage refinance isn't your only option. Consider these first:
- Home equity loan or HELOC. Keeps your original mortgage and rate intact while you borrow against equity. HELOCs averaged 7.30% as of August 2026; ClearPoint offers both separately from cash-out refinance.
- Personal loan. Unsecured option that doesn't put your home at risk, with rates averaging 12.43% APR for a $5,000, 3-year loan (700 FICO).
- Keep the car loan as-is. If the balance is small or the rate gap is minor, refinance costs likely aren't worth it.
Each path has trade-offs. A home equity loan or HELOC avoids restarting your mortgage clock, while a personal loan skips the risk to your house entirely.
Frequently Asked Questions
Is it better to pay off a car loan or refinance?
It depends on your remaining loan term, the rate gap, and your priority—cash flow relief or lower total interest. Early-stage car loans with high rates favor refinancing more than nearly paid-off ones.
What is a cash-out refinance and how does it work?
It replaces your existing mortgage with a larger one, and you receive the difference in cash. That cash can then be used to pay off other debts, including a car loan.
How much equity do I need to refinance my mortgage?
Most lenders require you to retain at least 20% equity after a cash-out refinance on a primary residence, though this varies by property type and lender guidelines.
Does refinancing my mortgage to pay off debt hurt my credit score?
A hard inquiry can temporarily lower your score by a few points, but paying off high-utilization debt like a car loan can help your score recover and improve over time.
What are the risks of using home equity to pay off a car loan?
You're financing a depreciating asset with equity from your home, and you extend that debt over 15-30 years instead of 3-5. This often costs more in total interest.
Are there closing costs when refinancing a mortgage?
Yes. Closing costs typically run 2-6% of the loan amount and cover appraisal, origination, and recording fees. Factor these into your savings calculation before deciding.
