How Much Can You Borrow on a HELOC Instead of an Auto Loan to Buy a Car?

The Quick Read: Usually the limit is your home equity, not the car’s price: your line is set by the home’s value, the lender’s combined loan-to-value cap, and what you already owe against the home, so a car-sized draw is typically far smaller than the line you qualify for. The real questions are cost, risk, and what the draw does to your borrowing power for the next rental.

• The formula is home value × maximum combined loan-to-value, minus every loan already secured by the home.
• On the wholesale network Lendmire works with, the ceiling is 90% on a primary residence at 720+ credit and 70% on an investment property.
• Line size starts at $25,000 (with a lower floor in Michigan), so a small car purchase can leave you with far more line than you need.
• Unlike a generally fixed auto loan, the HELOC’s cost floats for the life of the line.
• Every dollar drawn sits against your home and counts as debt the next time you apply for investment financing.

How Is the Maximum HELOC Size Calculated?

The maximum line equals your home’s value times the lender’s maximum combined loan-to-value (CLTV), minus all existing liens. A lien is a lender’s legal claim on a property. Most car purchases are small next to that number, so the formula rarely blocks you. It does tell you how much borrowing power you would be spending.

Walk through it in percentages. Say your home is worth 100% of its appraised value and your mortgage balance is 50% of that value. If the lender’s cap is 85% CLTV, the most you could add is 35% of the home’s value. If the mortgage is already at 85% of value, you have nothing left to borrow.

Experian’s HELOC walkthrough uses this same multiply-then-subtract method. The network Lendmire works with sets its own tiers by occupancy and credit, covered next, so the caps in a general walkthrough will not always match the network’s caps.

Four other items can shrink the result:

• Credit score. The network’s floor is 600 on primary residences, and higher scores unlock higher CLTV tiers. Second homes start at 640 and investment properties at 700.
• Debt-to-income ratio (DTI). DTI compares your monthly debts to your income. The network’s maximum is 50%, with 45% for credit profiles from 600 to 679. A ratio above 45% requires a 680 minimum.
• Valuation. Lines at or below $500,000 ordinarily use an automated valuation instead of a traditional appraisal. A higher CLTV may require a second valuation.
• Dollar caps. Even with plenty of equity, the line stops at the program’s maximum.

What Are the Network Ceilings by Occupancy and Credit?

Primary residences reach 90% CLTV, but only at 720+ credit. Second homes also reach 90% at 720+. Investment properties stop at 70%. These are guideline ranges from select wholesale lenders, subject to full file review and not a commitment to lend.

Larger primary-residence lines exist. At 700+ credit, a primary-residence line can reach $750,000 at 75% CLTV, with a full appraisal required above $500,000. A second home or investment property can never carry a line above $500,000.

Two eligibility rules matter before you run any numbers. The property must be titled in your personal name or an inter vivos revocable living trust, which is a trust you can change during your lifetime. An LLC, corporation, or irrevocable trust cannot hold title. Manufactured homes, co-ops, condotels, and log homes are not eligible. Availability is also limited to 16 states, which is narrower than the DSCR footprint.

Does the Price of the Car Change How Much You Can Borrow?

No. The price only tells you how much you need. Equity and the CLTV cap set your ceiling. Sizing matters more than the maximum, because two network rules push you toward a line close to what you actually need.

First, the minimum line is $25,000. Second, at least 75% of the line is drawn at closing. You cannot open a large line, draw a small amount for the car, and keep the rest idle.

The line is also not a fixed-term car loan. The network offers two draw structures on primary residences and second homes:

• A 3-year interest-only draw followed by a 17-year repayment period.
• A 5-year interest-only draw followed by a 25-year repayment period.

Investment lines use the 5-year draw and 25-year repayment structure only. During the draw period you can pay interest only, so the balance does not fall unless you pay extra. Experian’s explainer on borrowing against a house for a car describes the same pattern: a draw period, then repayment, plus closing costs that most auto loans do not carry.

Any extra draws after closing have a $1,000 minimum, with a higher minimum in Texas.

HELOC vs. Auto Loan: How They Differ

A HELOC is secured by your home and its interest cost floats. An auto loan is secured by the car and is generally fixed. The Consumer Financial Protection Bureau’s HELOC booklet describes a HELOC as a loan you borrow, spend, and repay as you go, with your home as collateral. It warns that you can lose your home if you fall behind.

The Federal Trade Commission adds that you pay interest only on what you borrow, not the full line, and that the lender can take your home if you do not repay. Consumer Reports makes the same collateral point: with a conventional auto loan the vehicle is the collateral, and with a HELOC your home is in jeopardy.

One more myth: a HELOC is not automatically cheaper. Between closing costs and a long repayment runway, the total cost can run above a plain auto loan, depending on your credit and whether the car is new or used.

What Happens If the Car Loses Value or Gets Totaled?

You can owe more than the car is worth, and the line does not care. A car loses value every year. A HELOC with a five-year draw and a 25-year repayment period can run far longer than the car lasts. Pay only the interest during the draw, and the balance on your line stays flat while the car declines.

If the car is totaled, insurance pays the car’s value. The line balance is yours either way. A shorter payoff schedule is the practical guardrail. Treat the draw like an auto loan: pick a payoff date inside the car’s useful life, then pay principal on that schedule even when the line lets you pay interest only.

Collateral is the heaviest difference. A defaulted auto loan costs you the car. A defaulted HELOC can cost you the home. The CFPB booklet also says a lender can freeze or reduce a line if your home value falls or your finances worsen, so the available balance is not guaranteed to stay available.

What Does a Car Draw Do to Your Investor Leverage?

It uses equity that your next property purchase may need. Every dollar drawn raises the total debt against that home, and the line is an extra lien that any future lender will count.

Four effects matter if you plan to keep buying rentals.

• Less room for a cash-out later. A drawn balance reduces the equity a cash-out refinance on that same home could reach. A second lien must also be paid off or subordinated before a new first-lien loan can close on top of it.
• Higher personal debt. HELOCs are underwritten on you personally. The lender qualifies your DTI on the interest-only payment calculated on the maximum draw, so the DTI it sees is built on a large number.
• Exposure limits. A borrower is limited to three lines, and a borrower with more than 15 financed properties is not eligible.
• Rental-use limits. The CFPB booklet says renting out your home may be prohibited under the line’s terms. If you own the home as a rental, the line becomes an investment-property line: 700+ credit, 70% CLTV at most, and $500,000 at most on this network.

When Does a DSCR Loan Beat Using Equity on a Car?

A DSCR loan is the better home for equity when the goal is another rental. DSCR stands for debt service coverage ratio: the property’s monthly rent divided by its monthly PITIA, which is principal, interest, taxes, insurance, and association dues. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. A HELOC is reviewed on you.

DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. Here is what select lenders across the network typically look for, as ranges and not promises:

• Purchase leverage. On a DSCR rental purchase, most files land at 75%–80% LTV (20%–25% down). Select programs reach 85% LTV at roughly a 700+ score.
• Cash-out. On a DSCR cash-out refinance of a standard rental, the ceiling is around 75% LTV across most of the network. About six months of seasoning is the common expectation. Seasoning is the waiting period between buying a property and refinancing it.
• Coverage. 1.00 is where many select programs start. A separate select-lender path goes below 1.00, with leverage and terms adjusted. Stronger ratios open better pricing and leverage.
• Credit. A 620 floor exists in parts of the network. Most programs want around 660, and 700+ unlocks the strongest leverage tiers.
• Loan size. Standard loans reach up to $3,000,000 on standard programs, with smaller balances available through select lenders.
• Reserves. These vary by lender, leverage, and loan size, commonly around six months of PITIA. Conservative files at modest leverage may see them waived.

A DSCR ratio above 1.00 is not the same as positive cash flow. The calculation covers rent versus PITIA only. Repairs, vacancy, management, utilities, and capital expenses sit outside it.

If you want the full picture, Lendmire’s complete DSCR loans guide walks through how the loans are structured.

Here is the practical decision. If you can qualify for a normal auto loan, that loan keeps your home out of the transaction and leaves your equity for a rental. If you cannot qualify, or the car purchase is small and short-lived, a HELOC sized tightly with a fast payoff plan is the usual argument. It is a closer call than it looks, because the interest-only draw makes the monthly cost look small while the balance barely moves.

Key Terms Defined

HELOC. A home equity line of credit is a revolving loan secured by your home that you borrow from, repay, and borrow from again as you go.

CLTV. Combined loan-to-value is all loans secured by the home added together, divided by the home’s value.

Lien. A lien is a lender’s legal claim against a property until the loan is repaid.

Draw period. The draw period is the stretch when you can borrow from the line and may pay interest only. Repayment follows, when principal comes due.

DSCR. Debt service coverage ratio compares a rental’s income to its monthly debt payment.

PITIA. PITIA is principal, interest, taxes, insurance, and association dues, the full monthly obligation on a property.

If You Want to See the Numbers

If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage, and your goals. Lendmire is a broker that arranges DSCR investor financing through select lenders in its wholesale network across 41 markets, including Washington, D.C. Its home equity lines are available in 16 states and run through a separate set of programs. The site’s calculator offers an illustrative estimate you can edit. Reach the team at 828-256-2183 or request a quote through the quote page.

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage that arranges home equity lines of credit through wholesale lending partners in its 16 full-service states. Lines on primary residences, second homes and investment properties are each reviewed individually by the lender under the program’s occupancy, credit and combined-loan-to-value guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Experian: How Much Can I Borrow With a HELOC

2. Experian: Can You Borrow Money Against Your House for a Car

3. CFPB HELOC booklet

4. FTC: Home Equity Loans and Home Equity Lines of Credit

5. consumerreports.org: Car Financing Alternatives