What is a Home Equity Line of Credit?
If you’re a homeowner, you could be sitting on a financial tool called a Home Equity Line of Credit without even knowing it.
A Home Equity Line of Credit (HELOC) lets you take advantage of the equity you've built in your home to fund major expenses. But like most things, a HELOC is only as effective as the plan behind it.
What Is a HELOC?
A HELOC is a revolving line of credit secured by your home.
Think of it like a credit card that is backed by your home's equity and at a lower interest rate.
Your equity = What your home is worth – what you still owe on your mortgage
For example, if your home is worth $3M and you owe $1M, you have $2M in equity. A lender might allow you to borrow against a portion of that (normally up to 80–85% of your home's value, minus what you owe). In our example, that would be roughly $1.4M.
HELOCs have two phases:
The draw period (5–10 years): You borrow from the line of credit as needed and only pay interest on what you've drawn.
The repayment period (10–20 years): The line closes, and you repay both principal and interest on the outstanding balance.
Interest rates on HELOCs are typically variable, meaning they move with a benchmark rate like the prime rate. This makes them more flexible than a traditional home equity loan (which is a lump sum at a fixed rate) but also means your payments will likely fluctuate over time.
Why Would Someone Open a HELOC?
HELOCs are commonly used by homeowners who have built equity in their property through appreciation, years of mortgage payments, or both.
They tend to be a good fit for:
Homeowners with significant equity who need access to capital (ex. for a large medical expense) but don't want to sell their home or take on a high-interest loan.
High-income earners looking to manage large, irregular expenses (ex. a backyard renovation) without disrupting their investment portfolios.
Business owners who want flexible access to capital for business needs.
Families in high cost-of-living areas, like the Bay Area, who need to fund large expenses like home renovations or education.
Those near or in retirement who want a liquidity cushion without triggering taxable investment sales.
To benefit from a HELOC, you should have a clear reason for the funds and a well-defined plan on how you will use it.
There are several reasons a homeowner might establish a HELOC, even if they don't plan to use it immediately.
Home Improvements and Renovations: One of the most common uses of HELOCs. Investing back into your home can help increase its value, and a HELOC lets you fund renovations over time rather than using savings or taking on high-interest debt.
Debt Consolidation and Cash Flow Management: If you're carrying high-interest debt, you can use a HELOC to consolidate it at a lower interest rate. This can reduce monthly cash outflows which you can then put towards savings. However, if you do this you’re securing that debt against your home, which can be risky if you don’t plan properly.
Access to Liquidity Without Selling Investments: Selling stock to fund a large expense (ex. your child’s college, funding a business) can trigger capital gains taxes, but a HELOC lets you access cash without selling. This way, you can keep your investments in place and (hopefully) let them grow.
Safety Net: Some homeowners open a HELOC and never draw from it. They keep it as an emergency reserve since HELOCs typically have low or no annual fees and no cost until you borrow.
What Does a HELOC Mean for Your Taxes?
The tax treatment of a HELOC depends on how you use the funds.
A HELOC doesn't create taxable income when you draw from it since borrowing money is not a taxable event.
However, the interest you pay may or may not reduce your tax bill depending on how you use the money and whether you itemize deductions.
For high-income earners who already itemize, a HELOC used for qualifying purposes can provide a deduction.
For those who take the standard deduction, the tax benefit may be limited or nonexistent.
Interest Deductibility: The "Use of Proceeds" Rule
Under the Tax Cuts and Jobs Act of 2017, HELOC interest is only deductible if the funds are used to buy, build, or substantially improve the home that secures the loan. This is known as the "qualified residence interest" rule.
If your HELOC is used for:
Home renovations: The interest is likely deductible as qualified residence interest, subject to the overall mortgage interest deduction limits ($750k of acquisition debt for mortgages originated after December 15, 2017).
Debt consolidation or personal expenses: The interest is generally not deductible.
Investment purposes: The interest may be deductible as investment interest expense, but this is subject to its own limitations.
Business purposes: If you own a business the interest may be deductible as a business expense, but the rules are outside the scope of this article.
How Does a HELOC Fit into Your Financial Plan?
Cash Flow
During the draw period, a HELOC can improve cash flow by giving you a low-cost borrowing option. If you're paying interest-only on a $100k draw at 7%, that's roughly $583/month which is far less than most borrowing options for that amount. However, when the repayment period begins, your payment obligation will increase substantially.
Debt Management
Converting high-interest debt into a lower-rate HELOC saves money, but it’s not worth it if the debt-incurring spending continues. A good plan incorporates the HELOC payoff timeline to ensure it reduces debt rather than just moving it around.
Investment Management
The ability to borrow against home equity instead of selling positions is a big advantage. The decision between drawing on a HELOC or selling investments to fund a need should take into account your investment's expected return, the cost of borrowing, your tax situation, and your liquidity needs.
Estate Planning
Outstanding HELOC balances are a liability that reduce the equity in your estate. For families with multi-generational financial plans, understanding how a HELOC interacts with estate assets, beneficiary planning, and overall net worth is important.
HELOC Example
David and Lisa own a home in Danville, CA worth $2M with a remaining mortgage of $600k. They have $1.4M in equity and can borrow up to 80% of the home's value ($1.6M), minus the outstanding mortgage. So, they could establish a HELOC of up to $1M.
They decide to open a $300k HELOC. They use half to renovate their kitchen and primary bathroom (qualifying home improvement use), and keep the remaining $150k undrawn as a liquidity reserve. The interest on the $150k for renovations is deductible as qualified residence interest. They never end up using the other $150k but have comfort knowing it's there.
Over the next three years, their renovations increased the home's value. Their deductible interest reduced their tax bill. And, they avoided selling stock (which continued to grow) to fund the project.
What are the Pros and Cons of HELOCs?
Advantages:
Access to lower-cost capital compared to personal loans or credit cards.
Flexible draw structure (borrow only what you need, and only when you need it).
Potential tax deductibility if used for qualifying home improvements.
Keeps your investment portfolio as is and avoids triggering capital gains.
Can serve as a financial safety net at little or no cost when not drawn.
Disadvantages:
Variable interest rates mean payments can change over time.
Your home serves as collateral, so missed payments have serious consequences.
Tax benefits are limited and depend on how funds are used.
The shift from draw to repayment can cause a significant payment increase.
Administrative requirements of opening a HELOC (documentation, underwriting, closing costs).
Like most strategies, a HELOC works best when it's part of a plan that integrates your tax planning, investment strategy, cash flow needs, and long-term goals.
As always, we recommend working with a professional who understands both tax strategies and wealth management.
Author: Rob Cucchiaro, CFP®
Q&As in this blog:
What is a Home Equity Line of Credit?
What is a HELOC?
How to determine how much equity is in my home?
What is a HELOC draw period?
What is HELOC repayment period?
If I open a HELOC do I need to draw money from it?
What is the purpose of opening a HELOC?
What is the interest rate on a HELOC?
Who typically opens a HELOC?
Can I use a HELOC to fund home improvements?
Can I use a HELOC to fund home renovations?
Can I use a HELOC to consolidate debt?
How can I access cash without selling my investments?
How can I access cash to fund a business without selling my investments?
How can I access cash to pay for my child’s college without selling my investments?
Is HELOC interest deductible?
Is HELOC interest deductible if I used the money on home renovations?
Is HELOC interest deductible if I used the money to start a business?
Is HELOC interest deductible if I used the money to start a business?
If I paid interest on HELOC funds should I itemize or take the standard deduction on my tax return?
What are the pros and cons of HELOCs?
This material is purely intended to be general and educational in nature, and should not be construed as specifically-tailored investment, financial planning, tax, legal, or other professional advice. Information and data contained herein is as-of the date of publication, and may be subject to change in the future without notice. Any investment performance referenced is purely past performance, which is no guarantee of any future performance. Nothing contained herein should be construed as an offer to sell, a solicitation of an offer to buy, or a recommendation of any security or other financial product or investment strategy. All investment, tax, and financial planning strategies involve risk that you should be prepared to bear. You are highly encouraged to consult with professionals of your choosing before taking any action based on this material.