Refinancing a second mortgage: What you need to know

Owning a home can be an exciting milestone, and your house is more than just a place to live — it’s also an investment. As your home appreciates in value, you can access that growth through home equity — the amount your house is worth compared to the amount you still owe on your mortgage — and use it for renovations or debt consolidation.

If you’ve taken out a second mortgage, you’ve already put that equity to work. That’s why it might make sense for you to refinance your second mortgage, which could save you money in the long run. Want to learn about the benefits and risks of refinancing a second mortgage? Read on to find out if it’s the right move for you!

Can you refinance a second mortgage?

To be succinct, yes — you can refinance a second mortgage. Homeowners often do this to secure a lower interest rate, access funds for home renovations, or to consolidate their first and second mortgages.

What is a second mortgage?

Before we go further, let’s define exactly what a second mortgage is: it’s a mortgage other than your primary loan, which results in two monthly payments. This essentially puts a second lien on your home, which means failing to pay it can result in foreclosure. Mortgage subordination ensures the holder of your second mortgage will agree to remain in a lower position to the holder of your primary loan — even if the first loan is refinanced. 

There are also a few different types of second mortgages you can look at, including home equity loans, home equity lines of credit (HELOCs), and piggyback mortgages.

Types of second mortgages

Here are the three main types of second mortgages and the benefits of using them.

A home equity loan is a second mortgage that allows you to borrow money against your home’s equity. Because home equity loans use your home as collateral, these loans often come with a lower interest rate than other consumer loans. If this sounds like an option you’d like to pursue, get in touch with a Home Loan Expert to discuss a Home Equity Loan from Rocket Mortgage.

A home equity line of credit essentially functions like a credit card, which means there is a borrowing limit and you can draw from the HELOC up to that ceiling. These loans also use your home as collateral, which means they often have lower interest rates than credit cards.

A piggyback mortgage is a loan you take out in order to avoid private mortgage insurance (PMI), which is a fee that you must pay if your down payment is below 20% of the home’s value. The piggyback loan comes into play after you make a down payment of around 10% and use a second mortgage, often in the form of a home equity loan or home equity line of credit (HELOC), to pay the rest of the 20% obligation.

Note that Rocket Mortgage does not offer HELOC loans or piggyback mortgages, but we’ll help you understand them so you know all your options.

How refinancing a second mortgage works

You have two options if you want to refinance your home’s second mortgage:

Refinancing two mortgage loans into one

When you’ve taken out a second mortgage, you can refinance both your primary mortgage and this second mortgage with a new loan. This approach streamlines your payments and can help you save money over time by reducing interest costs.

Refinancing your second mortgage only

If you don’t want to refinance your primary mortgage, you can refinance your second mortgage on its own, either by taking out a new home equity loan or a new HELOC.

Pros and cons of refinancing a second mortgage

While there are some benefits to refinancing your second mortgage, it comes with some drawbacks, as well:

Pros

• Gives you access to better loan terms: Refinancing your second mortgage can help you secure a lower interest rate if the national rate dips, helping you save money in the long run.
• Lowers your monthly payment: By reducing your monthly bill, you can free up money for other priorities.
• Simplifies your finances: Combining your loans streamlines your payments and can lower your overall interest costs.

Cons

• Requires closing costs: Closing fees can add up, so be sure to weigh these initial costs against long-term savings.
• Brings a risk of foreclosure: Because you’re using your home as collateral, failing to make payments can lead to foreclosure.
• Can have a higher interest rate: Fluctuating market conditions mean you could end up with a higher interest rate than your primary mortgage.

When to consider refinancing a second mortgage

Refinancing your second mortgage can be a smart move if …

• You qualify for a lower interest rate: Signing up for a reduced rate can help you save over the life of your loan.
• You want to adjust your loan term: Extending or shortening your term can lower monthly payments or enable you to pay off your loan faster.
• You want to change the terms of your loan: Switching from a variable interest rate (which changes over time) to a fixed interest rate (which stays the same for the life of the loan) can provide more financial stability.
• You want to consolidate your loans: Combining your primary and second mortgages into one payment can help you enjoy a clearer financial picture.

How to refinance a second mortgage

If you’re considering refinancing your second mortgage, here are steps you need to take:

1. Assess your financial situation

You should have a clear-eyed idea of your financial status before you apply to refinance your second mortgage. Lending institutions have strict regulations for these loans, so you should have a strong command — and documentation — of the following:

• Income: Your annual earnings
• Credit score: A three-digit number that reflects your level of financial reliability
• Debt-to-income ratio (DTI): The percentage showing how much of your income goes toward debt
• Loan-to-value ratio (LTV): A figure that indicates the portion of your home’s value you can borrow

2. Apply for your new loan

Once you’ve chosen the right lender, you’ll need to provide details about your home and financial situation, such as income, credit score, and home value, along with any supporting documents. Most lenders offer online applications, and the lender will review your information and guide you toward approval after you’ve applied.

3. Complete the underwriting process

After you submit your application, your lender will begin the underwriting process. During this process, the lender verifies the details from your application, including your income, credit score, and more. Your home will likely need a new appraisal, which means a real estate professional will assess it to determine its true market value.                                                                                                                             

 4. Close on your new loan

Closing on your new loan is when you finalize the application — you’ll review and sign your loan documents, pay the closing fees, and confirm your terms. Once the ink is dry, you can start enjoying the benefits of your new mortgage.

How to refinance a second mortgage

If you’re considering refinancing your second mortgage, here are steps you need to take:

1. Assess your financial situation

You should have a clear-eyed idea of your financial status before you apply to refinance your second mortgage. Lending institutions have strict regulations for these loans, so you should have a strong command — and documentation — of the following:

Income: Your annual earnings

• Credit score: A three-digit number that reflects your level of financial reliability
• Debt-to-income ratio (DTI): The percentage showing how much of your income goes toward debt
• Loan-to-value ratio (LTV): A figure that indicates the portion of your home’s value you can borrow

2. Apply for your new loan

Once you’ve chosen the right lender, you’ll need to provide details about your home and financial situation, such as income, credit score, and home value, along with any supporting documents. Most lenders offer online applications, and the lender will review your information and guide you toward approval after you’ve applied.

3. Complete the underwriting process

After you submit your application, your lender will begin the underwriting process. During this process, the lender verifies the details from your application, including your income, credit score, and more. Your home will likely need a new appraisal, which means a real estate professional will assess it to determine its true market value.                                                                                                                  

4. Close on your new loan

Closing on your new loan is when you finalize the application — you’ll review and sign your loan documents, pay the closing fees, and confirm your terms. Once the ink is dry, you can start enjoying the benefits of your new mortgage.

The bottom line: Refinancing a second mortgage may be right for you

Refinancing your second mortgage can bring valuable benefits, including lower interest rates, simplified payments, and potential long-term savings. But it isn’t for everyone, so take your time to review your finances and goals to decide if refinancing your second mortgage is the right choice. 

If you’ve done your homework and you believe refinancing is the right move for you, apply for a Home Equity Loan from Rocket Mortgage today!

Rocket Mortgage is a trademark of Rocket Mortgage, LLC or its affiliates.

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

Home Equity Loan product requires full documentation of income and assets, credit score and max loan-to-value (LTV), combined loan-to-value (CLTV), and home equity combined loan-to-value (HCLTV) ratios. Requirements were updated 11/19/25 and are tiered as follows: 680 minimum FICO with a max LTV/CLTV/HCLTV of 80%, 700 minimum FICO with a max LTV/CLTV/HCLTV of 85%, and 740 minimum FICO with a max LTV/CLTV/HCLTV of 90%. Your debt-to-income ratio (DTI) must be 50% or below. Valid for loan amounts between $45,000.00 and $500,000.00 (minimum loan amount for properties located in Michigan is $10,000.00). Product is a second standalone lien and may not be used for piggyback transactions. Product not available on Ameriprise products. Guidelines may vary for self-employed individuals. Some mortgages may be considered “higher priced” based on the APOR spread test. Higher‑priced loans in the State of New York are subject to additional regulatory requirements. Additional restrictions apply. This is not a commitment to lend.