The 80/10/10 Piggyback Loan: How to Skip PMI Without 20% Down

"Can I avoid PMI without saving up a full 20% down payment?" is a question that surprises people when the answer is yes. The 80/10/10 piggyback loan is one of the ways to get there. It is not a loophole and it is not free, but for the right buyer it can genuinely beat paying mortgage insurance every month. Here is how it actually works.

The Structure Behind the Numbers

An 80/10/10 uses two loans and a down payment instead of one loan and a down payment.

First mortgage: 80% of the purchase price, a standard conventional loan

Second mortgage: 10% of the purchase price, usually structured as a HELOC

Your down payment: 10% of the purchase price

Add the first mortgage and your down payment together and you are effectively simulating a 20% down payment, even though you only brought 10% of your own cash. Since your first mortgage sits at 80% loan-to-value, it qualifies for financing with no PMI, the same as if you had put down the full 20% in one lump.

Why This Beats PMI for Some Buyers

Private mortgage insurance exists because your lender is taking on more risk when you put down less than 20%. The 80/10/10 structure sidesteps that entirely, because on paper your first mortgage never crosses the 80% LTV threshold that triggers PMI in the first place.

The real question is whether your second mortgage payment costs less than PMI would have. On a $400,000 home, buyers using this structure have saved over $300 a month compared to a single 90% loan carrying PMI, largely from eliminating the mortgage insurance premium and often getting a slightly better rate on the first mortgage itself.

What the Second Mortgage Actually Costs You

This is the part that gets glossed over. The second mortgage is not cheap money.

It carries a higher rate than your first mortgage, because the lender is in second position and takes on more risk if things go wrong. Many second mortgages in this structure are HELOCs with variable rates, meaning your payment on that portion can move after closing, not stay fixed like your first mortgage.

On a $40,000 second mortgage balance at 6%, you are looking at roughly $268 a month just for that piece, on top of your first mortgage payment. That number can climb if the underlying rate index rises.

Who Actually Qualifies

Credit score: Typically 680 to 700 or higher, meaningfully stricter than what some single-loan conventional programs allow

Debt-to-income ratio: Generally capped around 43%, counting both mortgage payments together, not just the first

Underwriting complexity: You are qualifying for two loans at once, often through two different processes, which takes more coordination than a single mortgage application

Where This Structure Also Gets Used

Beyond PMI avoidance, some buyers use an 80/10/10 to stay under conforming loan limits on a higher-priced purchase, avoiding jumbo loan pricing and the stricter jumbo underwriting standards that come with it.

The Real Trade-Off

You are choosing predictable-but-permanent PMI on one loan, versus a second loan with a higher, possibly variable rate that you have more control over, since you can typically pay it down or off faster than PMI cancels on its own. If you plan to attack that second mortgage aggressively, this structure can pay off. If your budget is already tight, carrying two payments with one of them variable adds real risk rather than removing it.

As a Mortgage Broker, Quazel can run the actual math on your purchase, comparing a straight loan with PMI against an 80/10/10 structure side by side, so you are deciding with real numbers instead of a rule of thumb.

Expect to close one week early.

Frequently Asked Questions

How does an 80/10/10 piggyback loan avoid PMI?

It splits your financing into an 80% first mortgage and a 10% second mortgage, combined with a 10% down payment. Because the first mortgage never exceeds 80% loan-to-value, it does not require PMI.

Is the second mortgage in an 80/10/10 more expensive?

Yes. Second mortgages carry higher interest rates than first mortgages, and many are structured as HELOCs with variable rates that can change your payment after closing.

What credit score do I need for an 80/10/10 loan?

Most lenders want at least 680 to 700, along with a combined debt-to-income ratio around 43% or lower when both mortgage payments are counted together.

Is an 80/10/10 loan always cheaper than paying PMI?

Not always. It depends on your specific rate on the second mortgage compared to what PMI would have cost you monthly. Running the actual numbers side by side is the only way to know which is cheaper for your situation.