Piggyback loans give home buyers another way to purchase a property with less than 20% down while potentially avoiding private mortgage insurance, or PMI.
Instead of putting all your available cash into one large down payment, this strategy splits the financing between a first mortgage and a smaller second loan. Buyers may use it to keep the primary mortgage within conforming loan limits, preserve more cash after closing, or create a financing setup that better fits their budget.
Still, two loans mean two sets of terms, payments, and costs to compare. This guide explains how a piggyback loan works, the most common structures, typical costs and requirements, and how it compares with PMI so you can decide if it makes sense for your home purchase.
Quick Navigation:
- What is a Piggyback Loan?
- How the Two-Loan Setup Works
- Common Piggyback Structures
- Piggyback HELOC vs Fixed Second
- Piggyback Loan vs PMI
- Piggyback Loan Requirements
- How to Apply for a Piggyback Setup
- FAQs
What is a Piggyback Loan?
A piggyback loan is a financing arrangement where a borrower takes out two separate loans to purchase a single property. Instead of one large mortgage covering the entire purchase (minus the down payment), the debt is split.
The primary loan usually covers 80% of the home’s value, a second loan covers a smaller portion (often 10%), and the buyer provides the remaining 10% as a down payment.
It is rooted in the idea of one loan “riding” on the back of another. It is specifically a purchase-money setup. While you might hear of people getting second mortgages later in life to renovate, a true piggyback mortgage is initiated at the same time as the first mortgage to facilitate the initial home purchase.
A combination mortgage (or “combo loan”) is simply another term for this setup. We use combination mortgages to provide flexibility. It is important to clarify that this is not a refinance product; it is a strategic way to structure a new home purchase from day one. By splitting the debt, we can often bypass the restrictive requirements of a single, high-LTV (loan-to-value) loan.
How the Two-Loan Setup Works
Understanding the mechanics of a piggyback mortgage loan is essential for budgeting. The process involves a coordinated effort between the lender(s) and the buyer to ensure both notes are funded simultaneously at closing.
- Pre-approval for the first mortgage: We first determine your eligibility for the primary loan, which typically covers 80% of the home’s price.
- Approval for the second loan: Simultaneously, we apply for a piggyback second mortgage. This second lender will review your credit and income to ensure you can handle the additional debt.
- Funding the purchase: Your down payment, combined with the funds from both loans, equals the total purchase price.
- Closing and payments: At the closing table, you will sign two separate promissory notes. Moving forward, you will have two different monthly payments—often to two different loan servicers.
When we look at your monthly budgeting, the debt-to-income (DTI) ratio becomes more critical. Because a piggyback loan requires two payments, we must ensure your total monthly obligations don’t exceed lender limits. This structure requires a disciplined approach to household finances, as you are managing two separate debt schedules.
Common Piggyback Structures
The most common way we structure these is the “80/10/10” model, but variations exist depending on your down payment capabilities and the home’s price.
80/10/10 Setup
In an 80/10/10 piggyback loan, the breakdown looks like this:
- 80%: First mortgage (avoids PMI because it’s at the 80% threshold).
- 10%: Piggyback second mortgage.
- 10%: Cash down payment from the buyer.
When dealing with combination mortgages, we look at Combined Loan-to-Value (CLTV). This is the total of both loans divided by the home’s value. In the 80/10/10 example, your CLTV is 90%. Other structures, like 80/15/5, allow for an even smaller down payment but result in a larger second loan.
Piggyback HELOC vs. Fixed Second
There are two primary ways to handle the second part of a piggyback mortgage loan. Each has different implications for your long-term costs.
- A Home Equity Line of Credit (HELOC) is a popular choice for the second loan. It is often a variable-rate product, meaning the interest rate and monthly payment can change over time. Understanding how a HELOC works can help you evaluate its draw period, repayment structure, fees, and variable-rate risk.
- A fixed-rate piggyback second mortgage provides more stability. The rate is locked in at closing, and your payment stays the same for the life of the loan (usually 15 to 20 years).
Which One Fits Better?
- Choose a HELOC if: You plan to pay the second loan off quickly or want the flexibility to draw funds again later.
- Choose a Fixed Second if: You want predictable monthly payments and want to avoid the risk of rising interest rates.
Pro Tip:
- If you choose a HELOC as your piggyback loan, try to make extra payments toward the principal early on. Since the interest rate on a line of credit can change, paying it down quickly reduces your risk and helps you build true equity in the home much faster than paying monthly insurance fees.
Rates and Closing Costs
It is important to realize that piggyback loan rates for the second mortgage are almost always higher than the rates for the first mortgage. This is because the second lender takes on more risk; if a foreclosure occurs, the first mortgage holder is paid in full before the second lender receives a dime.
Piggyback Loan Rates
When we analyze piggyback mortgage rates, we look at the “blended rate.” This is the average interest rate of both loans combined. Even if the second loan has a high rate, the blended rate is often lower than the cost of a single loan plus monthly PMI.
Closing Costs with Two Loans
Because you are technically taking out two loans, you may see a few more line items on your closing disclosure. You should investigate who pays closing costs during your negotiations to see if the seller can help offset these additional fees.
What to Compare On Loan Estimates
- Compare the total monthly payment (First + Second) against a single loan + PMI.
- Review our mortgage rate lock guide to understand how to time your locks for both loans to avoid surprises at closing.
Piggyback Loan vs PMI
According to the Consumer Financial Protection Bureau (CFPB), Private Mortgage Insurance (PMI) is usually required on conventional loans when the down payment is less than 20%. The piggyback loan vs. PMI debate usually comes down to math and how long you plan to stay in the home.
PMI protects the lender, not you. When you look at conventional loans in California, PMI is a standard monthly fee added to your payment if your first mortgage exceeds 80% of the home’s value.
Cost Comparison That Matters
- PMI: Usually a flat monthly fee that eventually goes away once you reach 20% equity.
- Piggyback Loan: A second interest payment that builds actual equity in the home as you pay down the principal.
Quick Break-Even Checklist
- Calculate the total monthly PMI cost.
- Calculate the interest-only or principal-plus-interest cost of the second loan.
- Compare total “lost” money (PMI vs. second loan interest).
While a piggyback mortgage avoids the “dead money” of PMI, a piggyback loan (especially a HELOC) carries the risk of variable rates. Conversely, PMI is stable but provides no benefit to your loan balance. If you have the budget to pay down the second loan aggressively, the piggyback usually wins.
Pro Tip:
- Unlike private mortgage insurance, which is often just a “lost” cost, the interest you pay on a piggyback loan may be tax-deductible. You should always consult with a tax professional to see if the interest on your second mortgage provides a better financial benefit than standard insurance.
Using a Second Loan to Avoid Jumbo
A piggyback loan is also a sophisticated way to handle expensive real estate without entering “jumbo” territory.
The FHFA has set the 2025 conforming loan limit at $806,500 for most of the U.S. (higher in high-cost areas). When a loan exceeds this, it becomes a jumbo loan, which often requires higher credit scores and larger reserves. You can learn more about jumbo loans in California to see the specific requirements.
When Splitting Helps
- Keeps the first mortgage under the conforming limit to get a better interest rate.
- Avoids the stricter underwriting standards of a single large jumbo loan.
When It Does Not
- If jumbo rates are currently lower than conforming rates (rare but possible).
- If the combination mortgage blended rate is higher than a single jumbo offer.
When This Strategy Makes Sense
A piggyback loan isn’t for everyone. We usually recommend exploring this option for specific buyer profiles.
When a Piggyback Loan Makes Sense
- First-time home buyer loans in California where the buyer has a 10% down payment and excellent credit.
- Second-time home buyer financing when equity from a previous sale isn’t quite 20% yet.
- Buyers who want to keep more cash in the bank for home improvements or investments.
When To Avoid It
- If you have a low credit score, second loan rates will be prohibitively high.
- If you have a very tight monthly DTI.
- Investors should also be cautious, as investment property loans in California often have stricter rules regarding subordinate financing.
Piggyback Loan Requirements
Qualifying for two loans is naturally more difficult than qualifying for one. Lenders for a piggyback second mortgage are often more conservative.
Credit and Reserves
You generally need a credit score of 700 or higher to get favorable terms on a piggyback loan. Lenders also want to see that you have a “cushion” of cash left over after closing.
DTI with Two Payments
Both mortgage payments count toward your DTI, so taking steps to lower your debt-to-income ratio may strengthen your application. The second payment is often calculated at a “stress-test” rate if it is a variable HELOC.
Property and Guideline Notes
Not all properties qualify. Some condos or multi-unit homes may have restrictions on piggyback mortgage loan structures. We verify the property eligibility early in the process to avoid delays.
How the Home Appraisal Affects Your Piggyback Loan
The home appraisal can affect how a piggyback loan is structured because lenders use the property’s accepted value when calculating loan-to-value (LTV) and combined loan-to-value (CLTV) ratios. Buyers should also account for how much a home appraisal may cost when estimating the total cash needed for closing. These figures help determine how much the first and second lenders are willing to finance.
For example, suppose you agree to buy a home for $600,000 using an 80/10/10 structure. If the property appraises below the purchase price, the originally planned loan amounts may no longer fit the lenders’ LTV or CLTV limits.
Depending on the loan programs involved, a low appraisal could mean:
- Bringing more cash to closing to cover the difference.
- Renegotiating the purchase price with the seller.
- Reducing or restructuring the first or second mortgage.
- Reviewing a different financing option if the required CLTV exceeds lender limits.
Both lenders care about the appraisal because the property’s value affects available equity and overall lending risk. The first lender will also review the terms of the piggyback second mortgage as subordinate financing during underwriting.
Reviewing appraisal and CLTV requirements early can help prevent financing surprises before closing.
Pro Tip:
- Because a piggyback loan involves two different lenders or loan products, your credit score is under extra scrutiny. It is a good idea to check your credit report for errors at least three months before applying to ensure you qualify for the lowest possible rates on both parts of the mortgage.
How to Apply for a Piggyback Setup
Applying for a piggyback loan requires a bit more coordination than a standard mortgage.
Step-By-Step Process
- Consult a Broker: We analyze if a piggyback or PMI is cheaper for your specific scenario.
- Submit Documentation: We gather the standard documents needed to buy a house.
- Dual Underwriting: Both the first and second loans go through approval at the same time. Receiving conditional mortgage approval does not mean the process is finished, since either lender may still request documents or impose conditions before closing.
- Closing: You sign both sets of loan docs on the same day.
Document Checklist
- Last two years of tax returns.
- Recent pay stubs and W-2s.
- Bank statements showing the down payment funds.
Questions To Ask A Lender
- “What is the blended interest rate of both loans?”
- “Is the second loan fixed or variable?”
- “What are the total closing costs for both loans combined?”
Piggyback Loan Closing Tips
Closing on a piggyback loan requires attention to detail. Don’t let the excitement of a new home cause you to overlook the mechanics of the combination mortgage.
Common Mistakes
- Ignoring the Second Rate: Focusing only on the low first mortgage rate while ignoring a high piggyback heloc rate.
- Cash to Close Surprises: Not accounting for the separate processing or recording fees for the second loan.
- No Exit Plan: Failing to have a plan to pay off the second loan if it has a variable rate.
Practical Tips
- Request side-by-side total cost estimates early.
- If using a HELOC, ask for a “worst-case scenario” payment calculation.
- Ensure your homeowners’ insurance policy lists both lenders as loss payees.
Pro Tip:
- Since a piggyback loan means you are essentially closing two loans at once, your total closing costs might be slightly higher. Ask your real estate agent to negotiate for seller concessions, which can help cover these additional fees and keep more money in your pocket at the closing table.
Next Steps
A piggyback loan can be a smart, strategic way to buy a home with less than 20% down while avoiding the long-term “sinkhole” of PMI. However, it adds a layer of complexity to your closing and requires a strong credit profile to be truly cost-effective. Whether you are using it as a piggyback mortgage strategy to stay under conforming limits or simply to preserve your cash, the numbers must make sense for your specific budget.
As mortgage professionals, we can help you navigate these choices. Learning how a mortgage broker can help will show you how we shop multiple lenders to find the best-blended rates for your situation.
If you are comparing PMI to a piggyback loan, ID Mortgage Broker can run side-by-side numbers and help you choose the cleanest option for your budget and timeline.
FAQs
What is a piggyback loan?
A piggyback loan is a strategy where a buyer takes out two mortgages at the same time to purchase a home. The first mortgage usually covers 80% of the price, and the second covers a smaller portion to help the buyer reach the 20% equity mark and avoid PMI.
What is a piggyback mortgage, and is it the same thing?
Yes, a piggyback mortgage is the same as a piggyback loan. It refers to the second mortgage that “piggybacks” on top of the first one to complete the financing for a home purchase.
Is a piggyback loan better than PMI?
It depends on your goals. A piggyback loan is often better if you want to build equity faster or if the interest on the second loan is tax-deductible (consult a tax pro). PMI is usually better if you want a simpler closing or have a lower credit score.
Are piggyback loan rates higher than regular mortgage rates?
Yes, piggyback loan rates for the second mortgage are typically higher than the first mortgage rates because the second lender is in a “subordinate” position, meaning they have a higher risk of not being paid if you default.
What is a piggyback HELOC, and what are the risks?
A piggyback HELOC is a line of credit used as the second loan. The main risks are:
- Variable interest rates that can rise.
- A “balloon” payment at the end of the term.
- Potential for the payment to increase significantly if market rates spike.
Can a piggyback loan help me avoid a jumbo loan?
Yes. By splitting the total amount into two loans, we can often keep the first mortgage under the conforming loan limit (currently $806,500 for most of the U.S. in 2025), which may offer more flexible terms than a single jumbo loan.
