"Should You Take a Second Loan Instead of Paying Mortgage Insurance When You Buy?"

Two offers are on your kitchen table for the same home, and the down payment is the same on both. The first is one mortgage with a monthly line for mortgage insurance. The second is two loans, a smaller first mortgage and a second loan behind it, and no mortgage insurance anywhere. A friend who bought last year told you to never pay mortgage insurance.

A first mortgage plus a purchase-money second can replace mortgage insurance when the first loan stays at or under 80 percent of the price, and it tends to fit clients who expect to pay the second off early. One loan with mortgage insurance tends to fit clients who plan to stay, because conventional mortgage insurance can be canceled, while the second loan stays until it is paid.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, NMLS #483943, through C2 Financial Corporation, licensed in fifteen states. This article is about conventional loans, the kind Fannie Mae and Freddie Mac buy, and how the two structures line up against your own plans.

A purchase-money second, often called a piggyback loan, is a second mortgage you take out at the same closing as your first, and the money goes toward buying the home. It is a different loan from the equity line an owner opens years later, which I cover in second mortgages and HELOCs explained.

How does a piggyback second loan replace mortgage insurance?

The trigger for mortgage insurance is the size of your first mortgage against the price. Freddie Mac's mortgage insurance section says mortgage insurance "is required for each conventional Mortgage Freddie Mac purchases that has a loan-to-value (LTV) ratio of more than 80%." On a purchase, Fannie Mae's loan-to-value section divides the loan amount by the lower of the sales price or the appraised value.

The second loan goes into a different ratio, the combined loan-to-value, or CLTV, which adds both loans together. Fannie Mae's CLTV section counts the first mortgage plus the unpaid balance of any second loan with a fixed amount and payment, as opposed to a line of credit. Fannie Mae's Eligibility Matrix sets one ceiling for the LTV and the CLTV together. So the second lets you keep the first mortgage at or under 80 percent while the total you borrow stays the same.

The agencies allow it, with conditions. Fannie Mae's subordinate financing section requires the second to have its own promissory note and a recorded mortgage behind the first. The lender has to disclose it to Fannie Mae, the appraiser and the mortgage insurer. Freddie Mac's secondary financing section covers a second that closes the same day as the first. It wants regular monthly payments that cover at least the interest. The second also has to run at least five years unless it fully pays itself off.

The rules on the second loan, from the guide I work from

The second loan's rules come from the lender making it. I work from a wholesale lender's second-mortgage guide, version 3.0, dated May 12, 2026. These are its rules for a purchase, section by section, as of that version.

• Purchases are eligible. Section 3.1 defines a purchase money transaction as one where the loan proceeds "finance the acquisition of the subject property," with no cash back beyond overpaid fees and certain prorated credits. A non-arm's length purchase, one where the buyer and seller have a relationship with each other, is not allowed.
• It stays in second position. Section 10.2 sets the term at 15 or 30 years and says the loan must be in second position.
• It has a minimum size. Section 10.16 sets a minimum loan amount of $150,000 and says the second has to be at least 15 percent of the first mortgage.
• Both loans count toward the combined total. Section 10.6 calculates CLTV from the first mortgage plus any other loan behind it, and Exhibit A caps that total by your credit score, the loan amount and whether you will live in the home. Its ceiling for a home you will live in is lower than the highest single-loan figures on Fannie Mae's matrix, so the two-loan route usually asks for a larger down payment.
• No mortgage insurance on the second. Section 10.14 says it is not required.
• Reserves cover both payments. Section 6.2 asks for six or nine months of your full housing payment in savings after closing, depending on the loan amount. That payment includes the second loan's payment. My article on what counts as mortgage reserves explains which accounts can fill that requirement.
• Both payments count when you qualify. Chapter 10 of the guide has the lender confirm you can afford the payment on "any simultaneous loan," so the second's payment is part of your debt-to-income ratio.
• It works if this is your first home. Section 2.3.1 allows it on a home you will live in, with a rent or mortgage payment history.
• No co-applicant from another address. Section 2.4 lists non-occupying co-applicants as ineligible, so a parent who co-signs from another address cannot be on this second.

Because of that minimum, the two-loan structure on this guide fits higher purchase prices, where a second of $150,000 or more is a natural piece of the financing.

One loan with mortgage insurance or two loans: how the structures compare

Both columns of this table assume the same purchase and the same down payment. The differences are about structure, and none of them depends on today's rates.

	One loan with mortgage insurance	First mortgage plus a purchase-money second
Loans and monthly payments	One loan, one payment, with mortgage insurance inside it	Two loans, two payments, no mortgage insurance
Size of the first mortgage	More than 80 percent of the price	At or under 80 percent of the price
Rules it follows	Fannie Mae or Freddie Mac, plus the mortgage insurer	The agency rules on the first, and the second lender's own guide on the second
Closing costs	One set of loan fees	Two sets, because each loan has its own fees on the Closing Disclosure
Reserves and qualifying	One payment counted	Both payments counted
How it ends	Mortgage insurance can be canceled under the guide and federal law; the loan continues	The second stays until you pay it off, sell the home or refinance it
Later refinance of the first	Ordinary refinance	The second is paid off in the refinance, or its lender signs to stay in second position

Can mortgage insurance come off a conventional loan?

Yes. Freddie Mac's mortgage insurance section says the coverage must "remain in force until canceled in accordance with the requirements of Sections 8203.2 through 8203.4(c) or pursuant to applicable law." The same section requires that you get the disclosures the Homeowners Protection Act of 1998 calls for when the loan is made, describing your right to cancel it.

The exact point where it comes off, and how to reach it sooner, is in when mortgage insurance goes away. Once it is gone, the loan itself carries on unchanged.

How do you pay off a piggyback second loan?

There are three ways a purchase-money second ends, and the choice of when is yours.

1. You pay it down or pay it off. Section 10.11 of the second-loan guide says prepayment penalties are "Not Applicable," so extra payments or a lump sum can go straight at the second.
2. You sell the home. Both loans are paid from the sale.
3. You refinance. Fannie Mae's subordinate financing section has a table for this. A refinance that pays off the first mortgage and a purchase-money second, with no cash out, is underwritten as a limited cash-out refinance. If you would rather keep the second and refinance only the first, the same section requires a resubordination agreement, where the second lender agrees in writing to stay behind the new first. My guide to purchase, refinance and cash-out loans explains how those refinance types differ.

Unlike mortgage insurance, the second has no point where it simply drops off. It is paid down over its 15- or 30-year term, and it ends when the balance reaches zero.

Comparing the two structures on your own purchase, step by step

1. You start by holding the cash to close the same on both. The same down payment goes into each version. Then you add each version's closing costs, and remember the two-loan version carries fees on both loans.
2. We then compare the total monthly payment on each one. On the one-loan version, that is the payment with mortgage insurance. On the two-loan version, it is the first mortgage payment plus the second loan payment.
3. You write down your plan for paying off the second. If money is coming within a few years, from the sale of the home you are leaving, a bonus or an inheritance, the second may not last long. If you have no plan to pay it early, it will be with you for its full term.
4. We look at how each one ends. On one side, the mortgage insurance can come off once your balance comes down. On the other, the second ends when you pay it, sell or refinance.

Mistakes that make the comparison come out wrong

• Comparing first mortgage payments alone. The second loan's payment belongs in the same column.
• Counting the mortgage insurance for thirty years. On a conventional loan, it can be canceled, so a comparison that runs it for the full term overstates its cost.
• Leaving out the second set of closing costs. Freddie Mac's secondary financing section has the file show the fees and costs of the second at closing, and they belong in your comparison.

An illustration with invented numbers

Numbers below are made up to show the mechanism. They assume a client whose credit and loan amount fit inside both guides' limits, and they leave out closing costs, which differ between the two versions.

Purchase price                                   $900,000
Down payment, 15 percent                         $135,000

ONE LOAN
First mortgage                                   $765,000
Loan-to-value                                         85%
Mortgage insurance                               Required

TWO LOANS
First mortgage                                   $615,000
Purchase-money second                            $150,000
Total borrowed                                   $765,000
First mortgage loan-to-value                          69%
Combined loan-to-value                                85%
Mortgage insurance                           Not required

Fannie Mae's loan-to-value section rounds a ratio up to the next whole percent, so $615,000 against $900,000 reads as 69 percent. The first mortgage did not land at 80 percent here, and the minimum is the reason. An 80 percent first would be $720,000, which leaves a $45,000 second. That is below the guide's $150,000 minimum, so the second has to be $150,000 and the first comes down to make room. The second is about 24 percent of the first, which clears the 15 percent rule.

Suppose the client in this illustration expects $150,000 from the sale of the home they are leaving within a year or two. The two-loan version lets that money retire the second outright, with no prepayment penalty on this guide, leaving a first mortgage at 69 percent with no mortgage insurance. Without that money coming, the one-loan version may fit better, because its mortgage insurance has a way off as the balance comes down, and there is only one loan to carry.

Your next step

If you are weighing these two structures on a purchase, you are welcome to call me at (843) 765-0000. I quote the second loan directly, because the pricing tool on this site prices first mortgages only. On the call I can put both versions side by side at your cash to close. Once you are ready to make offers, getting pre-approved is where your documents get reviewed for whichever structure you choose. If your price is near the top of the conforming range, my article on conforming versus jumbo loans covers how a second can keep the first mortgage conforming.

Nothing here is a loan approval, a denial, a commitment to lend, or tax or legal advice. The second-loan terms above come from one lender's guide as of its May 12, 2026 version, and the program your loan is placed with is decided on your own file.

Common questions

Can a second mortgage help me avoid PMI when I buy a home?

Yes, on a conventional loan. Freddie Mac requires mortgage insurance when the first mortgage is more than 80 percent of the value. A purchase-money second closed at the same time lets the first stay at or under 80 percent, so the first needs no mortgage insurance. The second is its own loan with its own payment, and both loans count toward the combined loan-to-value limit.

Does a piggyback second loan count in my debt-to-income ratio?

Yes. On the second-loan guide I use, the lender has to confirm you can afford both payments, and it counts the second's payment again in the months of reserves you need after closing.

Can I pay off a purchase-money second loan early?

On that lender's guide, yes, and Section 10.11 lists prepayment penalties as not applicable. You can make extra payments, pay it off with a lump sum, or pay it off when you sell. A refinance that pays off the first and the purchase-money second with no cash out is a limited cash-out refinance under Fannie Mae's subordinate financing section.

Can mortgage insurance be removed from a conventional loan later?

Yes. Freddie Mac's guide keeps mortgage insurance in force only until it is canceled under its servicing rules or applicable law. It also requires that you receive the Homeowners Protection Act disclosures about your cancellation rights when the loan is made. A purchase-money second has no such cancellation. It ends when it is paid off.

Is there a minimum size for a purchase-money second?

It depends on the lender. The guide I work from, version 3.0 dated May 12, 2026, sets a minimum loan amount large enough that this structure fits higher purchase prices, and the second has to be at least 15 percent of the first mortgage.

What happens to my second loan if I refinance my first mortgage?

You either pay the second off in the refinance or keep it. If you keep it, Fannie Mae requires a resubordination agreement, where the second lender agrees in writing to stay behind the new first mortgage. Paying off a purchase-money second along with the first, with no cash out, is underwritten as a limited cash-out refinance.