How to Use a HELOC to Buy a Second Home

You’ve built up equity in your primary residence, and now you’re considering using it to buy a second home. But is taking out a home equity line of credit (HELOC) to finance your purchase really a smart move?

We’ll explore how HELOCs work, potential advantages and disadvantages to consider, and the strategic approaches you could use to buy a vacation home or investment property.

What Is a HELOC and How Does It Work?

A home equity line of credit allows you to tap into your home’s equity through a revolving line of credit that you can access as many times as you choose throughout the loan’s draw period. During this phase, which typically lasts between five and ten years, you’re only responsible for making monthly interest payments on the funds you use.

Following the draw period, your HELOC enters the repayment period during which your line of credit closes, and you make amortized monthly payments to pay down your balance.

Unlike fixed-rate loans, HELOCs normally have a variable interest rate that can adjust monthly based on changes to the underlying index, most commonly the US prime rate — the baseline interest rate heavily influenced by the Federal Reserve’s federal funds rate.

How Much Can You Borrow?

The amount you can borrow with a HELOC is based on the value of your home and the loan-to-value limit set by the lender.

Most lenders have a maximum combined loan-to-value (CLTV) limit of 85%, meaning that your existing mortgage and home equity line of credit can total as much as 85% of your home’s appraised value.

FINDING YOUR HELOC ELIGIBILITY

Example: Let’s say you own a home worth $375,000 and your mortgage still sits at $262,500. That means you have 70% LTV (30% of the loan is paid off). If a bank offers up to 85% LTV, how would you figure out how much you can borrow? Take the percentage of your mortgage remaining and subtract it from the maximum LTV offered. 85% LTV (Lender max) – 70% LTV (your remaining LTV) = 15% Take the remaining percentage and multiply it by your existing home value. The amount you’re left with is how much you would be qualified to borrow. $375,000 (Home Value) x .15 (15% – LTV Difference) = $56,250 Answer: $56,250 total amount allowed to be borrowed.

In some cases, lenders may have different CLTV limits that vary depending on their risk tolerance.

Let’s use an example of a lender with a maximum CLTV of 90%. In this scenario, if your home is valued at $400,000 and you have an existing mortgage balance of $100,000, you could potentially qualify for a line of credit as large as $260,000.

How Using a HELOC to Purchase a Second Home Works

Depending on your equity and strategic preferences, you can use your HELOC to cover all or part of the cost of a second home. This could also include improvements made after the acquisition.

Down Payment Only

Borrowers with limited equity or who only want to use a portion of their equity can use the funds solely as a down payment on their second home and obtain a traditional mortgage for the remainder.

Qualifying for a conventional loan on a vacation home requires a minimum down payment of 10%. In contrast, an investment property requires a down payment of between 15% and 25%, depending on the number of units.

For Example: If you purchase a vacation property for $250,000, you could use $25,000 of your home’s equity as the down payment while obtaining a separate loan for the remaining $225,000 balance.

Down Payment and Improvements

Since your line of credit can be accessed multiple times during the initial draw period, a HELOC can be a great fit for covering a down payment and then making home improvements after you close.

Using the previous example, you could put down $25,000 using your HELOC, and then continue accessing your line of credit for improvements — such as replacing flooring, updating the kitchen, or adding a new roof — after you take ownership.

Larger Portion of Purchase Price

Another option is to use your HELOC to cover a larger portion of the purchase price of the second home, rather than just making the minimum down payment.

For Example: On a $250,000 second home, you could use $100,000 of your current property’s equity for the down payment, leaving only the remaining $150,000 to finance.

This strategy could help you qualify for a lower interest rate on your conventional mortgage, as lenders consider your initial equity when determining rates.

Bridge Strategy

If you have enough equity in your current property, you could use your HELOC to cover the entire cost of a second home. This would prevent you from needing to take out an additional mortgage and give you more leverage when negotiating with sellers.

Then, once you’ve acquired the new property, you can do a cash-out refinance and use the proceeds to pay down your HELOC and minimize the risk of changes to the adjustable interest rate.

Keep in mind that most lenders will only let you do a cash-out refinance for up to 75% of a single-unit vacation home or investment property’s value, meaning you likely won’t be able to fully satisfy your HELOC balance right away with this approach.

The Application and Approval Process

Here’s what to expect when applying for a HELOC, from start to finish.

1. Assess Your Home Equity

Most lenders will let you tap into as much as 85% of your home’s value. Before you apply, assess your home equity by comparing your property’s estimated worth to what you currently owe for a rough idea of how much you may be able to borrow.

2. Review Your Credit and Income

Mortgage lenders typically require a credit score of 680 or higher and a debt-to-income (DTI) ratio of no more than 43% to qualify for a HELOC. If you don’t meet these requirements, take the time to put together an actionable plan for improving your credit or lowering your DTI before applying.

3. Shop Around for HELOC Lenders

Not all lenders are the same. In most cases, you can help ensure the best terms on your HELOC by shopping around and obtaining quotes from at least three different mortgage providers.

4. Apply For Your HELOC

Once you’ve decided which lender you want to work with, formally submit your HELOC application and gather any additional documents requested by your loan officer.

5. Wait for Underwriting

After submitting your paperwork, the next step is to wait while the lender’s underwriting team reviews your creditworthiness. In some cases, you may need to obtain a home appraisal, although many HELOC lenders now rely on automated valuation models instead.

6. Closing On Your HELOC

When the underwriting team has completed its due diligence, your loan officer will schedule a closing. This can be completed virtually or in person, depending on your lender. From start to finish, it typically takes between two and six weeks to close on a HELOC.

7. Access Your Line of Credit

Federal law gives homeowners a 3-day Right of Rescission to cancel their loan, so you’ll typically gain access to your line of credit on the fourth business day following closing.

Pros of Using a HELOC for Second Home Purchases

Some of the most significant advantages of using a HELOC to purchase a second home include:

• Flexibility: You can use your line of credit however you choose, including buying a second home — whether as a down payment or to cover the full purchase price.
• Only Pay Interest on the Funds You Use: With a HELOC, you only pay interest once you draw from your line of credit — unlike other equity products that require payments from day one.
• Interest-Only Payments During the Draw Period: You won’t be required to repay your principal balance until the HELOC enters the repayment period, meaning your monthly costs will be lower in the early years of the loan.
• Preserve Your Primary Mortgage Rate: As a second mortgage, your HELOC won’t affect your existing primary loan — allowing you to hold onto a below-market interest rate.
• Competitive Advantage as a Buyer: Depending on the amount of equity you use, a HELOC can give you a competitive edge by enabling a sizable down payment or even a cash-only offer.
• Maintain Liquidity: Using your existing equity to fund your home purchase allows you to retain your savings, retirement accounts, and other invested assets — preserving liquidity for when you need fast access to cash.

Cons and Risks: What You’re Really Taking On

There can be downsides to using a HELOC for your home purchase, and you should carefully weigh the risks before using your home equity as a funding source. Potential cons include:

• Your Primary Residence Becomes Collateral: Taking out a HELOC means using your primary residence as collateral. If you were to default, your lender could foreclose on your home.
• Variable Rates Can Increase Costs: Since HELOCs have variable interest rates, rising rates could lead to larger payments than you initially planned for.
• Payment Shock During Repayment Period: You make interest-only payments during the draw period, but are responsible for repaying the principal balance once the loan enters its repayment phase — which could mean substantially larger payments, especially if rates have increased.
• Stricter Lender Requirements: As a second mortgage, HELOCs typically come with stricter credit score and DTI requirements than first-position loans like a cash-out refinance.
• Reduced Equity Stake: Borrowing against your equity reduces your ownership stake in the home, which could make it harder to refinance or access funds down the road.
• Tax Deduction Limitations: Taking out a traditional mortgage to purchase a second home typically allows you to deduct the interest payments on your taxes. Using funds from a HELOC secured by your primary residence may not offer the same tax benefit.
• Need to Manage Multiple Mortgage Payments: In addition to your current mortgage, a HELOC adds a separate monthly payment. If you also take out a mortgage on the second home, you’ll be managing payments on three loans simultaneously.

Pros and Cons of a HELOC for an Investment Property

Pros	Cons
Flexible use of funds for down payment or full purchase	Primary residence serves as collateral
Only pay interest on the amount used	Variable rates can increase monthly costs
Interest-only payments during draw period lower early payments	Payment shock when repayment period begins
Keeps your existing low primary mortgage rate intact	Stricter lender qualification requirements
Can strengthen offers with larger down payment or cash purchase	Reduces available home equity
Preserves savings and other investments for liquidity	Limited tax deduction benefits compared to traditional second-home mortgages
	Requires managing multiple monthly loan payments

Managing Your HELOC Over Time

Responsibly using home equity to buy a second home involves properly managing your HELOC across the life of the loan. Some best practices include:

• While you’re only required to make interest payments during the draw period, putting a little extra toward your principal balance can reduce your overall interest costs and make payments far more manageable during the repayment phase.
• Many lenders will allow you to lock some or all of your balance into a fixed-rate sub-loan. If you anticipate interest costs rising, locking in your rate may save you money. Keep in mind, however, that converting to a fixed rate will typically require making principal payments on the locked-in balance.
• Consider refinancing your line of credit before entering the repayment period — especially if your payments will be amortized over a short window, such as 10 or 15 years. This might mean refinancing into a longer-term fixed-rate loan or a new HELOC.
• The best strategy for managing your HELOC over time is to have an exit strategy in place from the very beginning — whether that’s a timeline for selling the investment home, plans to refinance, or a set point at which you’ll satisfy the mortgage.

Real World Scenarios: How It Actually Works

Let’s take a look at a few potential scenarios when purchasing a $250,000 single-family second home as a long-term rental and compare how the monthly costs may differ based on the strategic approach you take.

For consistency, we’ll assume a HELOC rate of 8.25%.

Conservative Approach

With this strategy, you’d use your HELOC to make the minimum required 15% down payment and obtain a conventional mortgage for the remaining amount.

On a $250,000 property, this would equate to a HELOC balance of $37,500 and a conventional purchase mortgage of $212,500.

Since the HELOC only requires interest payments during the initial draw period, the monthly cost is $258. The traditional mortgage, amortized over 30 years at 7.25% interest, would have monthly payments of $1,450.

In total, you would pay $1,708 per month under the conservative approach.

Aggressive Approach

With this strategy, you would use your HELOC to tap into a larger portion of your primary residence’s equity to make a 40% down payment on your investment home, and fund the rest with a traditional loan. This would result in a HELOC balance of $100,000 and a conventional mortgage of $150,000.

Based on an 8.25% rate, your monthly interest-only HELOC payments would be $688. Since the lower LTV on your conventional loan would allow you to qualify for a 7% rate, those monthly payments would be $998.

In this example, you’d pay a total of $1,686 each month. Although this is slightly lower than the conservative approach, you’d be significantly increasing the liability to your primary residence.

Bridge Strategy

With a bridge strategy, you’d use your HELOC to pay the entire $250,000 purchase price and then do a conventional cash-out refinance using the delayed financing exception to pay down the HELOC balance.

This would result in HELOC payments of $1,718 before the refinance. Based on the 75% LTV cash-out refinance limit for single-family investment properties, refinancing would result in a traditional loan of $187,500 and a remaining HELOC balance of $62,000.

This would lead to long-term monthly HELOC payments of $430, and a primary loan payment of $1,311 at a cash-out refinance rate of 7.5%, for a monthly total of $1,741.

Comparing the Numbers

	Long-Term Monthly Costs	Risk to Primary Residence
Conservative Approach	$1,708	Lowest
Aggressive Approach	$1,686	Highest
Bridge Strategy	$1,741	Moderate

For most borrowers, using their HELOC to finance the minimum down payment will be the optimal choice in this scenario, as it results in comparable overall monthly payments with the lowest risk to their existing home.

However, some buyers may opt for the bridge strategy, as using their HELOC to finance the entire purchase price could allow them to negotiate a better deal on their second home than if they needed to rely on additional financing — potentially lowering the purchase price and reducing final monthly costs.

Alternatives to Consider

Is a home equity line of credit the right way to fund your second home purchase? Make sure to consider these alternative funding sources.

Cash-Out Refinance

A cash-out refinance allows you to access your equity by replacing your current mortgage with a new, larger loan. This may be a better option if refinancing would also let you lower the interest rate on your existing loan.

Home Equity Loan

A home equity loan is a type of second mortgage with a fixed interest rate and consistent, predictable monthly payments. Home equity loans can be a good fit if you anticipate interest rates rising or need more stability in your monthly expenses.

Delaying Your Purchase

In some cases, it may make the most sense to delay your second home purchase until you can establish more equity in your primary residence or save up additional funds to use as capital. This is particularly true if taking out a HELOC would push your CLTV to the lender’s limit or stretch your finances too thin.

Is Using a HELOC for a Second Home a Good Idea?

Using a HELOC to buy a second home can be an effective strategy to expand your real estate portfolio. However, it’s crucial to first consider the risks associated with tapping your built-up equity and using your primary residence as collateral.

Ready to find out how much equity you can access? See what you qualify for at Refi.com or start your application today.