Yes, you can use a HELOC for a down payment, but lenders have strict rules about it

A home equity line of credit can fund a down payment on a second property, a new construction home, or a rental investment. However, the mortgage lender you're borrowing from to buy the new home will likely require you to close the HELOC or pay it down to near zero before they'll approve your loan. They do this because they see an open credit line as additional debt that reduces your ability to repay the new mortgage.

The timing and structure matter enormously. If you draw from the HELOC right before applying for the mortgage, the new debt will show up on your credit report and lower your debt-to-income ratio — the number lenders use to decide how much they'll lend you. If you draw after closing on the new home, you've already passed the lender's scrutiny, but you're still paying interest on two separate debts.

Key Takeaways

  • Most mortgage lenders require you to close or nearly pay off a HELOC before approving a new mortgage, even if you're using it for the down payment.
  • Drawing from a HELOC before applying for a mortgage increases your debt-to-income ratio and may reduce the amount you can borrow or raise your interest rate.
  • Some lenders allow you to keep a small HELOC balance if it's seasoned (open for several months) and you have strong credit and income.
  • Using a HELOC for a down payment costs you interest on both the HELOC and the new mortgage, so compare this against other funding sources like savings or a personal loan.

How lenders view an open HELOC when you apply for a new mortgage

When you submit a mortgage application, the lender pulls your credit report and calculates your debt-to-income ratio — the percentage of your gross monthly income that goes toward debt payments. This includes the HELOC, even if you haven't drawn from it yet. A HELOC with a $50,000 limit might be counted as a $500 monthly obligation (using a standard 1% calculation), which can push your ratio above the lender's threshold.

The lender also sees an open HELOC as a risk because you could draw from it after closing, taking on more debt without their knowledge. To eliminate this risk, most lenders require one of three things: close the HELOC entirely, pay it down to zero and have it closed in writing, or reduce the credit limit to a very small amount (often $2,000 or less). Some lenders will allow a small balance to remain if the account is seasoned — meaning it's been open for at least six months — and you have strong credit and income.

Timing: when you draw from the HELOC matters

If you draw from your HELOC before you apply for the new mortgage, the lender sees the debt immediately. Your credit report updates within days, and your available credit drops. This increases your debt-to-income ratio and may disqualify you, lower your approval amount, or raise your interest rate. The lender may also ask for a written explanation of where the money came from and what you plan to do with it.

If you wait until after closing on the new home to draw from the HELOC, you avoid the debt-to-income problem. However, you still need to have the down payment money available before closing — most sellers and lenders require proof of funds. You can show a HELOC commitment letter (a document from your bank stating the line is available) even if you haven't drawn yet. After closing, you can draw the funds and use them to repay any temporary loan or to cover closing costs you paid out of pocket.

The cost of using a HELOC for a down payment

A HELOC typically carries a variable interest rate, often tied to the prime rate plus a margin set by your bank. Current rates vary widely by lender and creditworthiness, but many HELOCs are in the 8% to 10% range. You'll pay interest on whatever you draw, and the rate can increase over time. Meanwhile, your new mortgage carries its own interest rate, which is usually fixed and often lower than the HELOC rate.

Using a HELOC for a down payment means you're paying interest on both debts simultaneously. If you put down $50,000 from a HELOC at 9% and borrow $400,000 on a mortgage at 6.5%, you're carrying $450,000 in total debt and paying roughly $4,500 per year just on the HELOC interest. Compare this against other options: a personal loan (often 8% to 12%), a gift from family, or delaying the purchase to save more cash. The math often favors saving or borrowing from family if those options are available.

Alternatives to using a HELOC for a down payment

If you have equity in your current home but want to avoid the HELOC complications, consider a cash-out refinance instead. You refinance your existing mortgage for a larger amount, receive the difference in cash, and use that for your down payment. This simplifies the debt picture for the new lender because you're not adding a new credit line — you're just increasing your existing mortgage. However, refinancing costs money (closing costs typically run 2% to 5% of the loan amount), and you'll pay interest on the larger mortgage balance for the full term.

A home equity loan is another option. Unlike a HELOC, a home equity loan is a fixed-rate, fixed-term loan that you receive as a lump sum. Some lenders view this more favorably than an open HELOC because the payment and term are locked in. However, you still face the same debt-to-income problem at application time, and you'll need to close or pay down the loan before the new mortgage closes.

If neither of those works, a personal loan, a 401(k) loan (if your plan allows it), or a gift from family may be simpler. A personal loan shows up as debt, but it's often smaller and shorter-term than a HELOC, so it has less impact on your debt-to-income ratio. A gift from family requires a gift letter stating the money is a gift and not a loan, but it doesn't show up as debt at all.

What to tell your lender upfront

Before you draw from a HELOC or apply for a new mortgage, contact your mortgage lender and ask directly: "Will you allow me to keep a HELOC open during the application and closing process?" Get the answer in writing. Some lenders have flexibility, especially if the HELOC is small or seasoned. Others have a blanket policy of requiring closure. Knowing this before you act saves you from surprises later.

If you've already drawn from a HELOC before applying for a mortgage, disclose it to your lender immediately. Hiding debt is fraud and will result in loan denial and possible legal consequences. Lenders verify everything through credit reports, bank statements, and title searches. It's far better to be upfront and work with the lender to find a solution — such as paying down the HELOC before closing or adjusting your loan amount — than to be caught in a lie.

Frequently Asked Questions

Will a HELOC hurt my credit score when I apply for a new mortgage?

Opening a new HELOC will cause a small, temporary dip in your score due to the hard inquiry. An existing HELOC won't hurt your score just by being open, but it will increase your debt-to-income ratio, which affects how much the lender will approve you for. If you draw from the HELOC before applying, the new debt will lower your score and your approval amount.

Can I use a HELOC to buy an investment property?

Yes, many investors use HELOCs to fund down payments on rental properties. However, the same lender rules apply: the new mortgage lender will likely require you to close or pay down the HELOC before closing. Investment property loans often have stricter requirements than primary residence loans, so confirm with your lender before drawing.

What if I don't have enough equity in my home for a HELOC?

Most lenders require at least 15% to 20% equity to open a HELOC. If you don't have that, you can't borrow against your home. In that case, explore a personal loan, a gift from family, or delaying the purchase to save more cash for a down payment.

Can I use a HELOC for a down payment if I'm buying a new construction home?

Yes, but new construction loans have their own timing quirks. The builder may require proof of funds before construction starts, and the lender may require the HELOC to be closed before the construction loan converts to a permanent mortgage. Discuss the timeline with both the builder's lender and your HELOC bank before committing.