A piggyback loan splits a home purchase across two loans closed at the same time, most commonly to sidestep private mortgage insurance or to keep the primary loan under the conforming or jumbo threshold. The classic version is called 80-10-10: an 80 percent first mortgage, a 10 percent second loan, and a 10 percent cash down payment. The math can save money, but only if you actually compare it against the alternative. This is general information, not financial or legal advice.
What changed in 2026
- PMI costs and piggyback second-loan rates both move with the broader rate environment, so the comparison between the two options needs to be rerun with current numbers rather than assumed from past years.
- Piggyback structures remain a niche but persistent tool, especially among buyers trying to avoid crossing into jumbo territory on what is a jumbo loan.
- Some lenders have simplified simultaneous closing for both loans, though not all offer piggyback products — availability varies more than for standard mortgages.
How the 80-10-10 works in practice
On a $500,000 home: an $400,000 first mortgage covers 80 percent, a $50,000 second loan (often a home equity loan or line of credit) covers 10 percent, and a $50,000 cash down payment covers the remaining 10 percent. Because the first mortgage sits at exactly 80 percent loan-to-value, it avoids the PMI requirement that would normally kick in above that threshold on a conventional loan.
Why avoid PMI in the first place
Private mortgage insurance protects the lender, not the borrower, and it adds a recurring monthly cost until you reach sufficient equity — see loan-to-value ratio explained for exactly how that threshold is calculated. A piggyback loan trades that PMI cost for interest on a second loan instead, which is not automatically cheaper — it depends on the specific rates and terms offered.
Weighing the real cost
The second loan in a piggyback structure typically carries a higher interest rate than the first mortgage, since it sits in a riskier second-lien position. Run the total cost of PMI over your expected time in the home against the total interest cost of the second loan over the same period before assuming the piggyback route wins.
| Structure |
First loan |
Second loan |
PMI required |
Down payment |
| Standard with PMI |
90-97% LTV |
None |
Yes |
3-10% |
| 80-10-10 piggyback |
80% LTV |
10% (2nd lien) |
No |
10% |
| 80-15-5 piggyback |
80% LTV |
15% (2nd lien) |
No |
5% |
| 20% down, no piggyback |
80% LTV |
None |
No |
20% |
Who this fits
Piggyback loans tend to make sense for buyers with strong credit who have some cash but not a full 20 percent, and who want to avoid PMI specifically, or who are trying to stay under a jumbo threshold rather than qualify for jumbo underwriting. It is less useful for buyers who could just as easily save for a larger single down payment.
FAQ
Is a piggyback loan the same as a home equity loan?
The second loan in a piggyback structure is often structured like a home equity loan or line of credit, but it closes simultaneously with the purchase rather than afterward.
Does a piggyback loan avoid PMI entirely?
Yes, when the first mortgage stays at or below 80 percent loan-to-value, PMI is not required on that first loan under standard conventional rules.
Is the second loan's rate fixed or variable?
It depends on the lender and product — some piggyback second loans are fixed, others are variable-rate lines of credit. Confirm terms before closing.
Can a piggyback loan help avoid jumbo underwriting?
Yes, some buyers use a piggyback structure to keep the first mortgage under the conforming limit, avoiding jumbo qualification rules entirely.
Where to go next
See the threshold this structure often avoids in what is a jumbo loan, understand the equity math in loan-to-value ratio explained, and compare a rural zero-down alternative in what is a USDA loan.