This is where a piggyback loan comes in. It's a strategy that uses two loans, closed at the same time, to buy one house. One covers most of the purchase price. The other fills the gap.
This guide breaks down how piggyback loans work, the common structures, real costs, and who actually qualifies. We'll also touch on where Golden Gate Lending Group fits into the picture for San Francisco buyers dealing with complex, high-value transactions.
Key Takeaways
- Piggyback financing closes a primary mortgage and a second loan (often a HELOC or home equity loan) together
- The common 80/10/10 structure finances 90% of the purchase and is used to avoid PMI
- Two loans mean two credit, DTI, and reserve reviews, so qualifying takes more work
- In high-cost markets like the Bay Area, piggybacks can keep the first mortgage under jumbo loan limits
What Is a Piggyback Loan and Can You Use Two Loans to Buy a House?
Yes, you can use two loans to buy a house. That's the premise of a piggyback loan, sometimes called a combination mortgage. According to Bankrate's 2025 breakdown, it's two loans obtained at the same time for one purchase, with the smaller loan covering part of the financing.
Here's how it works: your primary mortgage stays at 80% loan-to-value. A second loan, recorded as a junior lien, covers another slice. You bring the rest as a down payment.
Why buyers choose this route:
- Avoiding PMI, which kicks in below 20% down on a conventional loan
- Keeping the primary mortgage under conforming loan limits to skip jumbo underwriting
- Reducing the upfront cash needed compared to a full 20% down payment
Piggybacks were more common a decade or two ago, before low-down-payment programs went mainstream. They still help buyers limit cash outlay without carrying PMI on the first mortgage.
In the Bay Area, where median home prices routinely land above $1M, that structure still matters. The two loans close simultaneously, often with separate lenders, rates, and terms, so you're managing two relationships from day one.
How Piggyback Loans Are Structured
The classic setup is 80/10/10: 80% first mortgage, 10% second loan, 10% down. On a $1.2M San Francisco-area home, that breaks down to:
- $960,000 first mortgage
- $120,000 second loan
- $120,000 down payment
That combination finances 90% of the purchase.
Common Variations
Not every buyer fits neatly into 80/10/10. Two other structures show up regularly:
- 80/15/5: 80% first, 15% second, 5% down. Finances 95% of the purchase (Bankrate) and fits buyers short on cash but strong on income.
- 75/15/10: 75% first, 15% second, 10% down. Often used on condos, where a lower first-lien LTV can unlock better pricing.
The second loan is usually one of two products:
- HELOC: Variable rate, flexible draws, more rate risk
- Fixed home equity loan: Steady payment, less room to adjust later
Why Loan Limits Matter Here
The FHFA set the 2025 conforming loan limit baseline at $806,500, with a high-cost ceiling of $1,209,750. That ceiling applies to Marin, San Francisco, San Mateo, and Santa Clara counties for one-unit properties.
An 80% first mortgage on a $1.5M home lands at $1.2M, just under the cap. Structure the loan right, and you avoid jumbo underwriting entirely, even on a seven-figure purchase.
Piggyback Loan vs. PMI: Weighing the Costs
PMI isn't cheap, but it's not permanent either. Freddie Mac gives a benchmark range of $30 to $70 per month per $100,000 borrowed (roughly 0.36% to 0.84% annually). On a $960,000 loan, that's somewhere between $288 and $672 per month.
A second loan replaces that PMI payment with interest on the piggyback balance instead. Here's the catch:
- PMI cancels once you hit 20% equity, or automatically at 78% of original value
- The second loan doesn't cancel: you keep paying it until it's paid off, refinanced, or the home sells
That's the break-even question worth running before you commit:
- If your second loan's rate runs well above PMI's effective cost and you build equity quickly, PMI may cost less long-term
- If you're staying put for decades or plan to pay down the second loan aggressively, piggyback financing can win
Run the math on your specific numbers (rate, term, and expected time in the home) before assuming either option is the obvious choice.
Qualifying for a Piggyback Loan: Is It Hard to Get Two Mortgages?
Yes, it's harder than qualifying for one loan. You have to show two different underwriters that you can handle both payments at the same time. Credit score expectations:
- Primary loan: Fannie Mae's manual underwriting minimum is 620 for fixed-rate loans, 640 for ARMs
- Second loan: Bankrate notes piggyback lenders often want closer to 700, though some accept 680 Debt-to-income (DTI): Lenders typically target 36% combined across both loans. Some programs go higher when you have strong compensating factors, such as cash reserves or a lower LTV. Reserves: With two liens in play, lenders often want proof you can cover several months of combined payments if income drops. Two loans also mean two servicers, two due dates, and two sets of paperwork. It's manageable, but it isn't simple.
Who Should Consider a Piggyback Loan (and Who Shouldn't)
Good Fits
- 10%+ down payment buyers who want to skip PMI without draining reserves
- Luxury or investment buyers keeping the first mortgage under jumbo limits on high-value homes
- Condo buyers using a 75/15/10 structure to lower first-lien LTV
Not the Best Fit
- Buyers who already qualify for simpler single-loan options like FHA or VA
- Buyers unwilling to juggle two payments, two lenders, and resubordination when they refinance later
Fit also depends on cash flow. Bankrate’s 28/36 guideline keeps housing near 28% of gross income and total debt near 36%. In the Bay Area, where C.A.R. reported a median price near $1.4 million in May 2025, that math tightens quickly—so run your own DTI numbers instead of relying on a generic salary-to-price rule.
Where Golden Gate Lending Group fits in: A piggyback fixes financing structure. It does not fix timing. If you need to buy before your current home sells, a second lien still won’t let you write a clean non-contingent offer.
That’s the gap an owner-occupied bridge loan fills. Golden Gate Lending Group’s founder, Sofia Nadjibi, has 25+ years structuring $1M–$15M financing for Bay Area homeowners in this exact transition, often with equity-based approvals inside 24 hours rather than heavy income documentation. When a high-value purchase and a pending sale overlap, that speed can matter more than the piggyback structure itself.
Frequently Asked Questions
Can you use two loans to buy a house?
Yes. This is called a piggyback loan: a primary mortgage paired with a second loan, closed at the same time. Buyers commonly use it to avoid PMI or stay under jumbo loan thresholds.
Is it hard to qualify for two mortgages?
It's more challenging than qualifying for one loan since each has separate credit, DTI, and reserve requirements. Buyers with strong credit, stable income, and reserves generally manage it without issue.
Can I afford a $300k house on a $50k salary?
Using the 28/36 rule as a guideline, $50k in income supports roughly $1,167/month in housing costs. Whether that covers a $300k home depends on rate, taxes, insurance, and other debt, and it varies significantly by market.
What credit score do you need for a piggyback loan?
The primary loan typically requires a minimum of 620, while the second loan often needs closer to 680-700, depending on the lender.
Can a piggyback loan help me avoid a jumbo loan?
Yes. By splitting financing, the primary mortgage can stay under the conforming loan limit ($1,209,750 in high-cost Bay Area counties for 2025) while the second loan covers the remainder.
What happens if I sell or refinance a home with a piggyback loan?
At sale, the first mortgage is paid off before the second lien. Refinancing while keeping the second loan usually requires the second lender's approval through a resubordination agreement, which can take several weeks.
