Can You Borrow All Your Equity With a Primary Home HELOC?

The Quick Read: No, a primary-home HELOC almost never releases 100% of your equity, because lenders cap combined loan-to-value (CLTV) across every lien on the home and leave a cushion untouched. On this network, the primary-residence ceiling tops out at 90% CLTV, and only at a 720-or-better credit profile on a line of $500,000 or less.

• Usable line equals home value times the lender’s CLTV ceiling, minus existing liens.
• Credit, DTI, line-size caps and valuation can cut the number further.
• The approved limit is not a promise. A drop in value can freeze or reduce future draws.
• Investors using the cash for a rental still face a second underwriting on the DSCR loan.

Equity is the starting point. It is not the credit line.

What Does “All Your Equity” Actually Mean?

Equity is the home’s value minus what you owe against it. The federal consumer-finance regulator HELOC brochure says you can typically borrow up to a specified percentage of that equity, not the whole figure. The lender counts every lien on the home, including the first mortgage and any existing second, and the new line sits on top.

Key Terms Defined

• Equity: the home’s current value minus the total mortgage balances owed against it.
• CLTV (combined loan-to-value): all liens on the home, including the new line, divided by the home’s value.
• Draw period: the stretch when you can borrow from the line and pay interest only.
• Repayment period: the later stretch when the balance amortizes and the line stops revolving.
• DSCR: a rental loan ratio that compares a property’s rent to its monthly housing obligation.

Can You Borrow 100% of It?

No, and Here Is Why

No federal rule sets one national CLTV cap for HELOCs. The ceiling is lender and investor policy, and the market keeps a cushion. Market surveys report that most lenders allow roughly 85% combined LTV, with some at 80% and some reaching 90% for strong borrowers, per CBS News. Yahoo Finance makes the same point: because of CLTV limits, you usually can’t borrow 100% of your home’s value through a HELOC.

Those are market-wide figures. Across the wholesale network Lendmire works with, the primary-residence tiers are specific, and they step down as credit weakens.

The 90% tier exists only at 720 or better. Without that score, the ceiling is lower. Subject to lender guidelines and full file review.

How the Number Gets Built

The calculation runs in a fixed order.

1. Value is set. On this network, lines at or below $500,000 ordinarily run an automated valuation instead of a traditional appraisal. A higher CLTV may call for a secondary valuation, and you can request a full appraisal in any case.

2. The CLTV ceiling is applied. Home value times the ceiling, minus existing liens, gives the maximum line. If existing debt already exceeds the ceiling, capacity is zero.

3. Credit and DTI trim it. The maximum DTI is 50%, and 45% for profiles from 600 to 679. The line is qualified on the interest-only payment calculated on the maximum draw. The federal consumer-finance regulator booklet notes lenders also weigh income, debts and credit history.

4. Dollar caps can bind first. On a high-value home with a small mortgage, the program’s maximum line size decides the outcome before the equity does. The top line is $750,000, and anything above $500,000 is primary-residence only. It requires a 700 credit profile or better (720 on the longer-runway structure), a 75% CLTV cap and a full appraisal.

Picture a home worth $1,000,000 with a small first mortgage. Equity is large. The line still stops at $750,000 at 75% CLTV, and a 90% tier would stop at $500,000. The cap, not the equity, sets the limit.

Now picture the opposite: a borrower whose first mortgage already sits near the ceiling. The math returns nothing. Plenty of owners have equity on paper and no line to show for it.

The Primary-Home Tradeoff at 720

A 720 borrower faces a choice, not one answer. Take up to 90% CLTV on a line of $500,000 or less. Or take a larger line up to $750,000, but at a reduced 75% CLTV, with a full appraisal. Higher leverage or higher dollars. Not both.

Structure matters too. These are standalone lines in first or second lien position. One draw structure is a 3-year interest-only draw followed by a 17-year amortizing repayment. The other is a 5-year draw followed by a 25-year repayment. At least 75% of the line is drawn at closing, and pricing floats through both periods.

Other file mechanics worth knowing: the credit report can be no more than 90 days old at closing, a bankruptcy needs 4 years of seasoning, and manufactured homes, co-ops, condotels and log homes are not eligible. Title must sit with the individual or a revocable living trust. A home already deeded to an LLC needs a vesting change first.

Availability is also narrower than the DSCR footprint. This product is offered in 16 full-service states.

What Happens After Closing?

The limit is not a guarantee. Existing balances stay. Future draws are what get cut.

That matters most for anyone who plans to draw the full amount later. A line approved at the ceiling has the thinnest cushion when values slip. Leaving room is a decision, not a failure to maximize.

One more warning from the brochure: renting your home to others may be prohibited under the terms of your line. House-hackers should read that clause before drawing.

The Investor Decision: HELOC Cash Into a Rental Purchase

Using primary-home equity for a down payment is common. It is two separate underwritings, and a clean file clears both.

The HELOC underwrites the borrower: credit, equity, liens and DTI. The DSCR loan underwrites the rental: rent against the property’s PITIA. DSCR files qualify primarily on property-level rental income covering the payment, subject to lender guidelines. The HELOC payment normally sits outside the ratio but inside your real cash flow.

Clearing 1.00 does not mean positive cash flow either. Repairs, vacancy, management, utilities and capex sit outside the calculation. An interest-only, variable HELOC payment stacked on top makes that gap real.

On the DSCR side, here is how most files behave across the network:

• Purchase leverage mostly lands at 75% to 80% LTV, with select high-leverage programs reaching 85% at roughly a 700+ score.
• Borrowed funds are often accepted for down payment and closing costs with documentation, and commonly excluded from reserves. An undrawn line counts for nothing.
• Treatment varies. Some DSCR lenders accept documented draws, some cap the borrowed share, some want unborrowed funds. Ask before you draw.
• Expect to supply the HELOC closing documents, a draw confirmation, statements showing the cash landing, and a credit report showing the new liability. The line has to exist and be funded before contract.

An investor on a BiggerPockets thread says HELOC money is almost always permissible as a down payment source, while another commenter in the same thread notes the buyer is effectively leveraging the new purchase at 100% and must include both payments in the numbers. Both points hold up in practice.

For a deeper look at the borrower-side tradeoffs, Lendmire’s piece Does a Rental HELOC Let You Borrow Against All Your Equity? covers the investment-property line, which carries a 70% CLTV ceiling. For the full picture of how rental loans qualify, see the complete DSCR loans guide.

Should You Take the Maximum?

The sound test is purpose and payoff. If you can name what the money earns and how the balance gets repaid, a large draw can work. If not, borrow less.

Common Myths

“Free equity means I can pull it all.” No. Lenders hold back a cushion.

“Equity is my line.” Equity is the base. The usable amount is value times the ceiling minus liens, then trimmed by credit, DTI and dollar caps.

“The limit is a promise.” A significant decline in value can freeze or cut it.

“An undrawn line is cash in the bank.” For DSCR reserve purposes it generally counts for nothing.

“HELOC payments hurt my DSCR ratio.” Normally not, since the ratio is rent over the subject property’s PITIA. The payment still hits real cash flow.

Questions to Ask Before You Apply

• What is the CLTV ceiling for my credit tier and occupancy?
• Does the full limit count against me, drawn or not?
• Is the line size capped below what my equity suggests?
• Is the limit the same through the whole draw period?
• What happens to my line if value drops?
• Will my DSCR lender accept these funds for down payment?

Tax treatment varies; consult a qualified professional.

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’s piece Should a Business Owner Tap Primary Home Equity With a HELOC? covers the same decision from the self-employed side.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB HELOC brochure

2. CBS News

3. Yahoo Finance

4. CFPB HELOC booklet

5. BiggerPockets thread on HELOC as a down payment