Yes, you can borrow against your current home's equity to fund a down payment on a new one, but lenders treat this source differently than savings or a gift

A home equity line of credit (HELOC) is a revolving loan secured by the equity you have built in your existing home. When you use it for a down payment, you are borrowing against that equity to fund the purchase of another property. The money moves from your HELOC account to your new mortgage lender, just like any other down payment source.

The catch is that mortgage lenders scrutinize HELOC-funded down payments more carefully than they scrutinize savings or gifts. They want to know whether you are taking on too much total debt, whether the HELOC draws will strain your ability to pay both mortgages, and whether you understand that you now owe money on two homes simultaneously. Some lenders will accept a HELOC down payment without hesitation. Others will decline the loan or require you to meet stricter conditions.

The timing also matters. You need the HELOC in place and funded before you make an offer on the new home, because your mortgage lender will want to see the money already sitting in your account when they review your process.

Key Takeaways

  • A HELOC down payment is allowed by most lenders, but they will ask detailed questions about your total debt and monthly payment obligations across both homes.
  • Your mortgage lender will verify that the HELOC funds are actually in your account before closing, so you cannot borrow the money after you make an offer.
  • Using a HELOC increases your debt-to-income ratio, which may lower the size of mortgage you can obtain or raise your interest rate.
  • You will owe monthly payments on both the HELOC and the new mortgage, even if you have not yet sold your current home.
  • Some lenders will not accept a HELOC down payment if you are also carrying a balance on the line, or if the HELOC was opened very recently.

How lenders view HELOC down payments versus other sources

When you provide a down payment from savings, a lender sees money you already own. When you provide a gift from a family member, the lender sees money that does not increase your debt load. When you use a HELOC, the lender sees a new debt obligation that reduces your borrowing capacity and increases your monthly expenses.

Most conventional mortgage lenders will accept a HELOC down payment, but they treat it as borrowed money, not as your own funds. This means the monthly payment on the HELOC counts toward your debt-to-income ratio—the percentage of your gross monthly income that goes to debt payments. If your ratio is already high, adding a HELOC payment may push you over the lender's threshold and disqualify you for the mortgage amount you need.

FHA loans, VA loans, and USDA loans have their own rules about HELOC down payments. FHA allows them but requires the HELOC to be open for at least two months before you explore for the mortgage. VA and USDA have stricter limits on how much total debt you can carry. Check with your lender about their specific policy before you open a HELOC.

What happens to your debt-to-income ratio when you borrow from a HELOC

Your debt-to-income ratio is calculated by dividing your total monthly debt payments by your gross monthly income. Most lenders cap this ratio at 43 to 50 percent, depending on the loan type and your credit profile. When you add a HELOC payment, that ratio climbs.

Here is a concrete example: suppose your gross monthly income is $5,000. Your current debt payments—car loan, student loans, credit cards—total $1,200 per month. Your ratio is 24 percent, well below the 43 percent threshold. Now you open a HELOC and borrow $50,000 for a down payment. If the HELOC payment is $250 per month, your total debt payments rise to $1,450, and your ratio becomes 29 percent. You still have room to add a mortgage payment.

But if your current debt is already $1,800 per month, adding the HELOC pushes you to $2,050, or 41 percent of income. A new mortgage payment of $1,500 would bring you to 70 percent—far above any lender's limit. In this scenario, the HELOC down payment actually prevents you from borrowing enough to buy the home you want.

Your lender will run this calculation during the pre-approval process. If you are considering a HELOC, ask your lender to run the numbers with and without it so you understand the impact before you commit.

The timing requirement: HELOC funds must be in your account before closing

Your mortgage lender will require a bank statement showing that your down payment funds are already in your account. This statement is called a "proof of funds" document, and lenders typically ask for it within a few days of your offer being accepted. If you do not yet have the HELOC money, you cannot show proof of funds, and your offer may be rejected or your closing delayed.

Open and fund your HELOC at least two to three weeks before you plan to make an offer on a new home. This gives you time to receive the funds in your account and gather the documentation your mortgage lender will request. Do not assume you can borrow the HELOC money after your offer is accepted—by that point, it is too late.

Some lenders will also ask for a statement showing the HELOC balance and available credit. If you have already drawn down the line significantly, or if the available credit is much lower than the amount you borrowed, the lender may ask questions about how you plan to manage both debts.

Carrying two mortgages while you sell your current home

If you use a HELOC down payment and have not yet sold your current home, you will owe payments on both the HELOC and the new mortgage simultaneously. This is called "carrying two mortgages," and it strains your cash flow during the months between purchase and sale.

Your lender factors this into the debt-to-income calculation. They assume you will owe both payments until your current home sells, even if you plan to use the sale proceeds to pay off the HELOC. This is why some lenders require a higher down payment or a lower purchase price if you are buying before you sell.

A bridge loan is an alternative if you need the down payment money before your current home sells. A bridge loan is a short-term loan that covers the down payment and closing costs, and you repay it from the sale proceeds of your current home. Bridge loans are more expensive than HELOCs—interest rates are typically 1 to 2 percent higher—but they do not count toward your debt-to-income ratio in the same way, because they are assumed to be repaid quickly.

When lenders will reject or restrict a HELOC down payment

Some lenders will not accept a HELOC down payment if you are carrying a balance on the line. They view an active balance as a sign that you are already stretched financially. If you have borrowed $30,000 from a $50,000 HELOC and are making monthly payments, some lenders will ask you to pay down the balance before they will approve your mortgage.

Lenders also scrutinize HELOCs that were opened very recently—typically within the last 60 to 90 days. A brand-new HELOC can signal that you are scrambling to find down payment money, which raises red flags. If you know you will need a HELOC down payment, open it several months in advance so it has a history by the time you explore for the mortgage.

If your current home is underwater—meaning you owe more on the mortgage than the home is worth—you cannot open a HELOC at all, because there is no equity to borrow against. In this case, a bridge loan or a larger down payment from savings are your only options.

Questions to ask your lender before using a HELOC

Before you open a HELOC or commit to using one for a down payment, contact your mortgage lender and ask these specific questions: Will they accept a HELOC down payment? Will the HELOC payment count toward your debt-to-income ratio? Do they have a minimum age requirement for the HELOC (how long it must have been open)? Will they require the HELOC balance to be zero, or can you carry a balance? Do they want to see the HELOC funds in your account before you make an offer, or is proof of funds acceptable?

Different lenders have different policies, and some will be more flexible than others. Getting these answers in writing before you open a HELOC saves you from discovering disqualifying conditions after you have already borrowed the money.

Frequently Asked Questions

Can I use a HELOC down payment if I am still paying off my current mortgage?

Yes. The HELOC is a separate loan from your current mortgage, and you can borrow against your home's equity even while you are still paying the mortgage. Your lender will factor both the current mortgage payment and the HELOC payment into your debt-to-income ratio for the new mortgage.

What if I cannot get a HELOC because my home does not have enough equity?

You need at least 15 to 20 percent equity in your home to open a HELOC, depending on the lender. If your home does not have that much equity, a bridge loan, a larger down payment from savings, or a gift from a family member are alternatives. Some first-time buyer programs also allow down payments as low as 3 percent without a HELOC.

Will using a HELOC for a down payment hurt my credit score?

Opening a HELOC will cause a small, temporary dip in your credit score because the lender will run a hard inquiry and open a new account. The impact is usually 5 to 10 points and recovers within a few months. Carrying a high balance on the HELOC will hurt your score more significantly, because it increases your credit utilization ratio.

Can I use a HELOC down payment if I am self-employed?

Yes, but self-employed borrowers face stricter scrutiny overall. Your lender will want to see two years of tax returns and may require a higher down payment or a lower debt-to-income ratio. A HELOC down payment does not change this, but it does add another debt obligation that the lender will examine closely.

What happens to my HELOC if I sell my current home?

The HELOC remains open and available to borrow from, even after you sell your home. However, if you sell and pay off the mortgage on your current home, the equity that secured the HELOC disappears, and the lender may freeze or close the line. Check your HELOC agreement to understand the lender's policy on this scenario.