The Quick Read: Mortgage insurance adds a monthly cost to a 2-4 unit conventional loan whenever you borrow more than 80% of the home’s value. The cost depends on your down payment, your credit score, and how much coverage the loan requires. It ends on a different schedule than it does for a one-unit house. Nobody can give you an honest flat number without your file in hand.
Key Takeaways
- Mortgage insurance is required above 80% loan-to-value (LTV), the loan amount divided by the home’s value. Two- to four-unit principal residences can go up to 95% LTV.
- Published typical annual premiums run 0.58% to 1.86% of the loan balance. That is a range, not a quote. Your credit and down payment decide where you land.
- On a 2-4 unit loan, you generally pay any upfront mortgage insurance cost in cash. It cannot be rolled into the loan amount.
- Removal is stricter on 2-4 unit homes. The usual 80% request point and 78% automatic point are the floor, and a lower threshold can apply.
What Is Mortgage Insurance, and Who Does It Protect?
Mortgage insurance is a policy that pays the lender if you stop paying. You pay for it, but it protects the lender. That is the whole bargain: the lender accepts a smaller down payment, and you cover the insurer’s risk.
Conventional payment estimate
The starting figures are an example price at the first-time buyer’s minimum down payment. Replace them with yours.
Editable benchmark: 7.32% as of October 22, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a conventional loan quote.
Estimate seeded at the low end of Fannie Mae’s published range (0.58%–1.86% a year); the insurer prices the actual premium on the score and the leverage. Applies only above 80% loan-to-value.
Illustrative starting assumptions: a $350,000 price, the first-time buyer’s minimum down payment, a thirty-year term at the current Freddie Mac benchmark, mortgage insurance at the low end of Fannie Mae’s published range, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a conventional loan quote; your rate is set by the lender at lock. The mortgage insurance figure is an editable estimate seeded from Fannie Mae’s published typical range, not a premium quote; the insurer prices the actual premium, and the cancellation month assumes scheduled payments with no extra principal and no change in value. Taxes, insurance and dues are editable estimates; closing costs are not included. Conforming loan limits apply by county. Licensed in sixteen states for consumer mortgages.
The Consumer Financial Protection Bureau explains that private mortgage insurance, or PMI, usually applies when your down payment is under 20%. It can also apply to a refinance when you have under 20% equity.
Here is the part buyers miss. The insurance is priced on risk, not on the property type alone. Your LTV, credit score, loan term, and coverage level all feed into the premium. Higher LTV means the insurer carries more exposure, so the required coverage is higher. Higher coverage generally means a higher premium.
A duplex is still a house you live in. But the rules around it are tighter than for a one-unit home. Those rules show up in leverage caps, financing limits, and removal.
How Much Does It Actually Add?
The honest answer is a range, tied to your file. Published typical annual premiums run from 0.58% to 1.86% of the loan balance. The low end goes to borrowers with large down payments and strong credit. The high end goes to borrowers near 95% LTV with thinner credit. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
To read that as a monthly cost, take the annual percentage, apply it to your loan balance, and divide by twelve. The actual figure for your loan will appear only in a written quote from the insurer or lender. Anything before that quote is an educated guess.
Does the premium go up because you chose a fourplex over a duplex? No published agency table sets a separate multi-unit premium. In the files we arrange, unit count mostly changes the loan through eligibility and leverage limits. Insurers price from their own rate cards, so your quote is the only source for any unit-count effect on price.
Here is what moves the number, in rough order of impact:
| Factor | What it does to the cost |
|---|---|
| LTV band | Higher LTV means more coverage and more cost |
| Credit score | Stronger score usually lowers the premium |
| Coverage level | Standard coverage costs more than reduced coverage |
| Payment structure | Monthly, single-premium, or lender-paid |
| Loan term | Shorter terms typically price better |
How the Loan Is Underwritten, Step by Step
Underwriting a 2-4 unit purchase follows a set order. Each step shapes how much mortgage insurance you carry.
Step 1: Value and LTV. For a purchase, the lender uses the lower of the sales price or the appraised value. Per the Fannie Mae Selling Guide, a conventional first mortgage above 80% LTV needs mortgage insurance. A low appraisal can push your LTV up even if the price did not change. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Step 2: The appraisal. Two- to four-unit homes generally need a full appraisal. Appraisal waivers are not the norm for multi-unit properties. Plan for that cost and process.
Step 3: The automated finding. The lender runs your file through the agencies’ automated system. Across the wholesale programs we place files with, the automated finding governs most files. A 620 decision score is the starting floor. The total debt ratio ceiling is 50%.
Step 4: Coverage is set. The required coverage percentage comes from your LTV band and loan term. The mortgage insurance company, certificate, and coverage level come with the loan.
Step 5: Payment structure is chosen. Most borrowers pay monthly. Some pay a single premium upfront. Some take lender-paid coverage, covered below.
Step 6: Your housing payment gets counted. The monthly premium is part of the payment that goes into your debt ratio. That is how mortgage insurance can lower the loan size you qualify for. If you plan to count rent from the other units, the lender applies its rental income rules, subject to lender guidelines.
How Much Does Leverage Change the Picture?
Leverage is the biggest lever you control. Picture the same duplex bought three ways.
Scenario A: 5% down, which is 95% LTV. This is the top of the range for a two- to four-unit principal residence. The required coverage is at its highest, and so is the premium. Credit score matters most here. A borrower at the 620 floor and a borrower with strong credit can see very different results. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Scenario B: 10% down, which is 90% LTV. Coverage drops to a lower band. The premium falls with it, often by a meaningful margin.
Scenario C: 20% down, which is 80% LTV. No mortgage insurance applies. The payment is smaller, and nothing needs cancelling later. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
The cost of getting from Scenario A to Scenario C is cash up front. The cost of staying at 95% LTV is a monthly premium for years. That tradeoff is the real decision, and we will come back to it below. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
One more point. Down payment and reserves are separate. Some buyers stretch to 20% down and arrive at closing with nothing left. A thinner cushion on a multi-unit property, where a vacant unit hits your budget directly, can be a bigger risk than the premium.
Where the General Rule Breaks: Five Edge Cases
You cannot finance the premium on a 2-4 unit loan
Fannie Mae’s guidance on financed mortgage insurance does not accept 2-4 unit loans that include a financed borrower-purchased premium. The same applies to cash-out refinances and investment properties. In plain words, a single-premium policy has to be paid in cash at closing. Lender-paid coverage also cannot be financed into the loan.
This catches buyers off guard. On a one-unit loan, a borrower can sometimes fold an upfront premium into the balance. On a duplex, plan to bring that cash.
Three payment structures, side by side
| Structure | Financed into loan? | Cancellable? |
|---|---|---|
| Borrower-paid monthly | No, paid monthly with the payment | Yes, under set rules |
| Single premium, paid at closing | No on 2-4 units | Depends on the policy |
| Lender-paid | No | No, ends only on refinance |
Lender-paid coverage is not free. It usually shows up as a higher interest rate, and you cannot cancel it. It ends only when you refinance. Ask for the full terms side by side before choosing it.
Removal is stricter on a multi-unit home
For most borrowers, the Homeowners Protection Act sets the schedule. You may request cancellation when your balance reaches 80% of the home’s original value. The servicer must terminate it automatically at 78%. Both assume a good payment history, no subordinate liens, and no decline in value, per the Federal Reserve’s supervisory manual.
Here is the catch. For loans owned by Fannie Mae, the Servicing Guide sets a stricter, lower LTV criterion for a two- to four-unit principal residence. You also need a clean recent payment record. Your current value must be at least equal to the original value.
Whether that stricter rule applies depends on who owns your loan. Ask your servicer which investor holds it. Do not assume your duplex follows the one-unit schedule.
Cancellation is measured against original value. A rising market alone does not usually move the date under the standard route. Fannie Mae has a separate route based on current value, with its own LTV and valuation requirements. Ask your servicer for the specifics.
High-balance loans change the math
In expensive counties, a loan may exceed the standard limit and become “high-balance.” Per the Fannie Mae Eligibility Matrix, the leverage caps on high-balance 2-4 unit loans are lower. They tighten further at three and four units. A cap that low can leave little or no room above 80% LTV. That changes whether mortgage insurance applies at all. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
County loan limits change, so check the current figure for your county before you shop.
Programs for lower-income buyers carry their own tables
HomeReady and Home Possible have lower coverage requirements than the standard product at the same LTV. They carry an income limit of 80% of area median income. They also add program conditions on 2-4 unit purchases, such as occupancy rules and, in some cases, homebuyer education. Details vary by lender and guide version, so confirm them before you plan around them.
One line on occupancy. If you do not live in the building, the leverage rules change, and a 2-4 unit non-owner-occupied purchase caps at 75% LTV. At that level mortgage insurance generally does not come into play.
Does Rent From the Other Units Offset It?
Rent does not pay the premium directly. It helps you qualify. Lenders may count a portion of the rent from the units you do not occupy toward your income, per agency rental income rules and subject to lender guidelines.
That can make a real difference to your debt ratio. The monthly premium sits inside your housing payment. Rental income that counts toward qualifying can offset some of that load. But it does not reduce the premium itself.
Consider a simple picture. You buy a triplex at 95% LTV. The mortgage insurance premium is a fixed part of your payment. Rent from two units helps you qualify. Then one tenant leaves. The premium does not move, and your cash flow does. Build a vacancy cushion into your budget. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
On a manually underwritten file, the ratio limits are tighter, at 36% or 45%, depending on the reserve and score factors of the Eligibility Matrix. Automated findings are more flexible, up to the 50% ceiling.
How to Lower or End the Cost
Ways to reduce what mortgage insurance adds:
- Put down more. Each step toward 80% LTV drops you into a lower coverage band. At 80%, mortgage insurance does not apply.
- Raise your score before applying. Credit is the second-largest driver. A few months of paying down balances can change your pricing tier.
- Compare coverage options. Ask your broker to show monthly, single-premium, and lender-paid structures on the same loan.
- Plan for removal. Know your trigger point and your payment-record requirements from day one.
- Check the appraisal. If a low value pushes your LTV up, discuss options with your broker before you commit. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
Here is a break-even way to think about it. A larger down payment costs cash now. A lower premium saves money each month. Divide the extra cash by the monthly savings, and you get the months it takes to pay back. If you expect to move or refinance before then, the extra cash may not pay off. Your broker can run it on your actual quote.
How Does Conventional Compare With FHA Mortgage Insurance?
Both loans can finance a 2-4 unit home. They differ in how the insurance is structured and how long it stays. Conventional mortgage insurance can be cancelled when you build equity. FHA mortgage insurance follows its own schedule.
For a borrower with strong credit and a decent down payment, conventional often costs less over time. For a borrower with a lower score, FHA may be easier to qualify for. The right answer depends on your file. We see both work every week through our conventional loan programs and the government lanes.
If you later pull cash out of the building, the picture changes. Conventional cash-out on a 2-4 unit principal residence caps at 75% LTV, so mortgage insurance usually does not apply. Lendmire’s article How Mortgage Insurance Adds to a 2-4 Unit Cash-Out Refinance Payment walks through that.
Key Terms Defined
Loan-to-value (LTV): The loan amount divided by the home’s value. A 95% LTV means a 5% down payment. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
Private mortgage insurance (PMI): Insurance on a conventional loan that pays the lender if you default. You pay the premium.
Borrower-paid mortgage insurance: Coverage you pay, usually monthly, that can be cancelled once you meet the removal rules.
Lender-paid mortgage insurance: Coverage the lender buys, usually in exchange for a higher interest rate. You cannot cancel it.
High-balance loan: A conforming loan above the baseline county limit but within the higher limit for expensive areas. It has tighter leverage caps.
Original value: The lower of the price or appraised value when you bought. Standard cancellation rules measure against it.
Debt-to-income ratio (DTI): Your monthly debts, including the new housing payment, divided by your monthly income.
Frequently Asked Questions
Is mortgage insurance required on a duplex?
Yes, when you borrow more than 80% of the value. Two- to four-unit principal residences can go up to 95% LTV, so many buyers will carry it. At 80% LTV or below, it does not apply. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
Is the premium higher on a fourplex than on a duplex?
It can be, but no agency table sets a multi-unit surcharge. The insurer’s rate card sets the price, based on your LTV, credit, and coverage. Unit count also affects leverage caps and eligibility.
Can I cancel it earlier than a one-unit homeowner?
Generally not; cancellation on a 2-4 unit tends to come later, not sooner. Under the Homeowners Protection Act you may request cancellation at 80% of original value, and the servicer must terminate at 78%. On a Fannie Mae-owned 2-4 unit principal residence, a lower LTV threshold and payment-record tests can apply. Ask your servicer who owns your loan.
Can I roll the premium into the loan?
Not on a 2-4 unit. Fannie Mae does not accept financed borrower-purchased mortgage insurance on these loans, so any upfront premium is paid in cash. Lender-paid coverage also cannot be financed. Plan for that at closing.
Is mortgage insurance deductible?
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
Ready to Compare Your Options?
If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file. Every program figure here is subject to lender guidelines and full file review, and nothing here is a commitment to lend.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and home buyers in 16 states with FHA, VA, conventional and jumbo purchase and refinance loans arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Consumer Financial Protection Bureau
2. Fannie Mae Selling Guide B7-1-01, Provision of Mortgage Insurance
3. Fannie Mae Selling Guide B7-1-04, Financed Borrower-Purchased Mortgage Insurance
4. Federal Reserve’s supervisory manual
5. Fannie Mae Servicing Guide B-8.1-04, Termination of Conventional Mortgage Insurance
6. Fannie Mae Eligibility Matrix
This article is part of Lendmire’s conventional loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much More Down Lowers PMI on a Conventional Loan for a Condo · How Much a Conventional Refinance Finances to Drop Mortgage Insurance · How to Get PMI Off a 2-4 Unit Conventional Loan Early
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.