HELOC vs. second mortgage: How to compare your options

Your home is often your most valuable asset. As you pay down your mortgage and your home gains value, you build home equity. That equity is real wealth, but it stays tied up in your home until you choose to tap into it.

When weighing whether to take out a home equity line of credit (HELOC) or a second mortgage, keep in mind that while both let you convert equity into cash without changing your first mortgage, they handle funds differently. Second mortgages are popular today, with second-lien mortgages climbing 11.8% year over year in the first half of 2026, according to Inside Mortgage Finance.

Rocket Mortgage does not offer HELOCs currently, but we are here to help you weigh your options so you can choose what works best for your family budget.

Key takeaways:

• Both home equity loans and HELOCs let you borrow against your home equity without changing your primary mortgage.
• A home equity loan gives you a lump sum with fixed payments, while a HELOC acts as a revolving line of credit with variable rates.
• HELOCs provide flexible borrowing, but changing interest rates and shifting to full repayment can cause monthly payments to spike.

HELOC vs. second mortgage: Key differences at a glance

Many people say “second mortgage” when they mean a fixed home equity loan. In reality, “second mortgage” is an umbrella term. Both HELOCs and home equity loans sit behind your first mortgage as secondary liens.

Here is how interest rates and costs, repayment terms, and payment structure compare for HELOCs and home equity loans:

How second mortgages, home equity loans, and HELOCs work

Home equity is calculated by subtracting your remaining mortgage balance from your property value. A secondary lien means your original mortgage lender gets paid first if your home is sold, while the second lender gets paid second. Because second lenders take on higher risk, their rates are often slightly higher.

What is a second mortgage?

A second mortgage is an extra loan secured by your property in addition to your original mortgage. Unlike refinancing your loan to replace your existing mortgage with a new one, a second mortgage leaves your first mortgage alone. You simply add a second monthly payment. The 2 primary types of second mortgages are fixed home equity loans and revolving HELOCs.

What is a home equity loan?

A home equity loan is commonly called a traditional second mortgage. Your lender gives you your full loan balance upfront in a single lump sum. Most home equity loans feature fixed rates and set terms, such as 10 – 30 years. Your monthly payment stays identical each month, making budgeting simple.

What is a home equity line of credit (HELOC)?

Is a HELOC a second mortgage? Yes. However, a HELOC works more like a credit card. Your lender approves a credit line, and you draw cash from it as needed.

A HELOC has 2 main phases:

• Draw period: For up to 10 years, you borrow funds as needed and make monthly interest-only payments.
• Repayment period: For 10 – 20 years, you cannot borrow more funds and must pay both principal and interest.

Lenders often set your HELOC borrowing limit at up to 85% of your home’s appraised value. If your home is appraised at $307,000, an 85% limit allows total borrowing of up to $260,950, including your first mortgage. HELOC rates are usually variable, so your monthly payments can increase if market rates rise.

HELOC and home equity loan pros and cons

Evaluating the costs and benefits of a second mortgage versus a home equity loan helps you pick what best fits your needs and monthly budget.

HELOC pros and cons

HELOCs provide flexibility, but they require spending discipline. For more detail, see the pros and cons of a HELOC.

Pros:

• Borrow as needed: Draw cash as expenses arise and only pay interest on what you use.
• Reusable line: Paying down your balance during the draw period frees up credit to borrow again.
• Lower upfront costs: Closing costs typically range from 3% to 6% of your credit line.

Cons:

• Overspending risk: An open credit line makes it easier to spend more than you initially planned.
• Variable rates: Rising interest rates will raise your monthly payment.
• Payment shock: Bills jump when full principal repayment begins.
• Draw freezes: Lenders can freeze your line if home values drop.
• Foreclosure risk: Your home serves as collateral, so missing payments puts your house at risk.

Home equity loan pros and cons

A home equity loan offers stability, but you’ll have less flexibility after closing.

Pros:

• Lump-sum payout: Receive all cash upfront to cover large expenses immediately.
• Predictable payments: A fixed rate keeps your monthly payment the same regardless of the market.
• Clear timeline: You know your exact payoff date from day one.

Cons:

• Less flexibility: You can’t borrow more funds later without applying for a new loan.
• Immediate interest: You pay interest on the full loan balance from day one.
• Closing costs: Fees typically run 3% – 6% of your total loan amount.

When to choose a HELOC vs. a home equity loan

Your choice comes down to your project timeline, spending needs, and risk tolerance.

Choose a HELOC if

A HELOC works best for ongoing projects with uncertain costs, like multi-stage remodeling. Drawing funds as you go prevents borrowing too much upfront. Just make sure your budget can handle rising variable rates and the shift to full repayment.

Choose a home equity loan if

A home equity loan is ideal when you face a single, known expense, like a new roof or debt consolidation. A fixed lump sum gives you certainty with monthly payments that never change. Plus, leaving your original mortgage in place preserves your current low interest rate.

How to qualify and estimate your borrowing power

When you’re learning how to qualify for a HELOC or second mortgage, lenders look at several key factors:

• Home equity: Most lenders require you to retain 15% – 20% equity in your home.
• Credit score: Minimum scores vary by lender, but stronger credit can help you secure better rates.
• Debt-to-income (DTI) ratio: Lenders check that your monthly debt load isn’t excessive based on your income.
• Steady income: Documented pay shows you can afford 2 mortgage payments.

Online tools like a home equity calculator can help you estimate how much equity you could tap before applying.

Alternatives to a HELOC or home equity loan

If a second mortgage isn’t right for you, other borrowing options can help meet your goals.

Cash-out refinance

A cash-out refinance replaces your existing mortgage with a new, larger loan. You take the difference in cash and keep one monthly payment. This option works well if current market rates are lower than the rate you’re currently paying.¹

Personal loan

Personal loans don’t use your home as collateral. You receive a lump sum and repay it with fixed payments. Because the loan is unsecured, lenders charge higher interest rates, and you need good credit to qualify. However, you don’t have to worry about losing your home to foreclosure. Compare a personal loan vs. a home equity loan in more detail.

FAQ

Is a second mortgage a good idea?

A second mortgage can be a good idea if you have a steady income, plenty of equity, and a clear repayment plan. It’s often a smart way to pay for home improvements or wipe out high-interest debt. However, missing payments puts your home at risk, so only borrow what you can afford.

What is the monthly payment on a $70,000 home equity loan?

Your payment on a $70,000 home equity loan depends on your interest rate and loan term. A shorter loan term means higher monthly payments but less total interest. Online mortgage calculators can give you tailored estimates based on today’s rates.

Do second mortgages have closing costs?

Yes, second mortgages come with closing costs like appraisal, title, and loan processing fees. These fees generally range from 3% to 6% of your loan amount or credit limit.

Are HELOC and home equity loan interest payments tax deductible?

Interest on home equity loans and HELOCs might be tax deductible if you use the funds to buy, build, or significantly improve your home. Using the money for personal expenses or debt consolidation generally isn’t deductible. Tax rules are complex and do change, so consult a qualified tax professional about your situation.

The bottom line: Compare your home equity options before borrowing

Home equity loans and HELOCs both help you tap into your home equity. While home equity loans give you a predictable lump sum, a HELOC provides flexible draws over time. Review your budget, timeline, and comfort with risk to find the right loan for your needs.

Rocket Mortgage does not offer HELOCs currently. If a fixed lump sum fits your financial plans, apply for a Home Equity Loan with Rocket Mortgage today.² You can also start your application online.

¹ Refinancing may increase finance charges over the life of the loan.

² Home Equity Loan Product is a second standalone lien and may not be used for piggyback transactions. Valid for loan amounts between $45,000.00 and $500,000.00 (minimum loan amount for properties located in Michigan is $10,000.00). Not available on Ameriprise products. Additional restrictions, terms, and conditions apply. Must meet qualification requirements. This is not a commitment to lend.

This article is for informational purposes only and is not intended to provide, and should not be relied on for, medical, legal, financial, investment, or tax advice. You should consult with a qualified professional for advice specific to your situation. Consumers should independently verify that any services, products, or programs referenced meet their needs and comply with applicable requirements.

Rocket Mortgage is a trademark or service mark of Rocket Mortgage LLC or its affiliates.