The Quick Read: On most files, a vacant unit is counted at the appraiser’s market-rent opinion rather than at zero, while leased units count at the lower of lease or market rent, and treatment varies by lender and program. One empty unit does not automatically sink a fourplex file, but it does put more weight on the appraisal.
- The four unit rents are added together, then divided by one full payment (principal, interest, taxes, insurance, and association dues).
- A vacant unit has no lease, so the appraiser’s rent figure is the only number that can stand in for it.
- A few lenders want a signed lease, discount the vacant rent, or trim leverage instead.
- Condition matters. A unit that is rent-ready is treated very differently from a unit under renovation.
- Clearing the coverage test is not the same as positive cash flow.
Why a Fourplex Handles One Empty Unit Better Than Most Properties
A fourplex with one empty unit still has three paying units, so 75% of the rent is in place. A single-family rental with a vacancy has none. A duplex loses half its income. That structural cushion is why lenders in the network treat one vacancy in four as a manageable file rather than a red flag.
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As of Oct 15, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Rent, nightly rate, occupancy, taxes, and insurance are editable estimates. Short-term rental figures are estimates only and vary significantly by season, property type, management approach, and local short-term-rental rules — confirm local regulations before relying on them. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
Cushion is not the same as immunity. Every DSCR file asks one question: does the property’s rent cover its payment? DSCR stands for debt service coverage ratio, and it is the rent divided by the full monthly payment. A fourplex that clears the test with four units counted can land well under it with only three.
Size matters here too. A four-unit building on one parcel generally sits in the residential 1–4 unit category, so the simple rent-over-payment test applies. At five units, the review typically shifts to commercial-style underwriting based on net operating income. Lendmire’s guide to DSCR loans on duplexes, triplexes, and fourplexes walks through that dividing line. Four units is the largest building that gets the simpler test.
Key Terms Defined
DSCR (debt service coverage ratio): the property’s rent used for lender review divided by its full monthly payment. Select programs start at 1.00, where rent equals the payment.
PITIA: principal, interest, taxes, insurance, and association dues, the full payment the rent is compared against.
Market rent: what the appraiser concludes a unit would rent for today, based on comparable rentals.
Lower-of rule: for a leased unit, the lender counts whichever is smaller, the lease rent or the market rent.
Rent-ready: a unit that could be leased as it stands, with no repairs or renovation holding it back.
Seasoning: the waiting period a lender wants after you buy a property before it will refinance or cash out. Around 6 months is the common expectation in the network.
How the Rent Gets Counted, Unit by Unit
Underwriting runs in a fixed order. Each unit is evaluated on its own, and only then are the results added up. Here is the sequence.
1. The property is classified. Four units on one parcel means a residential 1–4 unit review.
2. The appraiser values the building and its rents. Appraisals of two- to four-unit properties use Form 1025, the Small Residential Income Property Appraisal Report. The single-family rent schedule, Form 1007, covers one-unit homes, so a fourplex does not use it. These are agency form names only. DSCR loans are not agency products, but the appraisal industry uses the same forms.
3. The appraiser gives a market-rent opinion for each unit, including the empty one.
4. The lender picks a counted rent per unit. Leased units use the lower of lease or market. The vacant unit uses market rent alone. There is no lower-of test for it, because there is no lease to compare.
5. The four counted rents are added.
6. The total is divided by one PITIA, the payment on the whole building.
7. The lender decides what the result means. It checks whether the number clears the program’s coverage floor, whether reserves should step up, and whether leverage should shift.
Step 7 trips people up. The appraiser produces a rent opinion. The appraiser does not decide how your income is treated. The lender does.
The table below shows what is counted in each tenant situation.
| Unit status | Rent evidence | What is typically counted |
|---|---|---|
| Leased, at market | Lease and rent schedule | The lease (equal to market) |
| Leased, below market | Lease and rent schedule | The lease |
| Leased, above market | Lease and rent schedule | Market rent |
| Vacant, rent-ready | Appraiser’s market rent | Market rent |
| Month-to-month | Appraiser’s market rent | Often market rent |
| Related-party tenant | Appraiser’s market rent | Market rent, closer review |
A lease above market adds nothing in a lower-of program. A big lease does not boost your ratio. A below-market lease holds that unit’s rent down.
The Appraisal Behind the Empty Unit
The vacant unit’s number has no lease behind it, so it rests entirely on the appraiser’s comparable-rental grid. The Form 1025 instructions direct the appraiser to reconcile the indicated monthly market rents into an opinion of market rent for each unit. That per-unit opinion is what your file leans on.
A defensible figure usually has three supports: recent comparable rentals of similar size and condition, clear photos and notes showing the unit is in rentable shape, and a rent that sits sensibly beside the other three units. A figure far above the leased units invites questions. A figure the appraiser cannot support may be trimmed.
Value and rent come out of separate analyses. A strong appraised value does not rescue a weak rent opinion on the empty unit. The reverse is also true. Strong rent does not raise the value. A low rent opinion can shrink what the lender will allow even when the building appraises well, since the file must clear both the equity test and the coverage test.
A Worked Example: One Empty Unit, Three Ways
Run the numbers on a fourplex where all four units have the same market rent. These are modeled assumptions, not market data. Say the building covers its full payment at 1.25x when all four units are counted. Here is how the ratio moves across the common treatments.
| Treatment of the vacant unit | Counted units | Resulting coverage |
|---|---|---|
| Market rent credited | 4 of 4 at market | About 1.25x |
| Zero credit | 3 of 4 | About 0.94x |
| Signed lease at 90% of market | 3 at market, 1 at 90% | About 1.22x |
| Signed lease above market | 4 at market (lower-of) | About 1.25x |
The first row is the typical result. The second row is your stress test. Run it before you make an offer. It shows what happens if a lender gives the empty unit no credit at all.
At 0.94x, a lender-by-lender conversation starts. Coverage of 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Both paths are subject to credit approval, property review, and the lender’s guidelines. Expect lower leverage on that path.
The third row shows why leasing first is not a free win. A signed lease slightly below market gives the file real paper, but it caps that unit’s rent. If the market opinion is higher, you gave up some ratio to get the lease.
Where Lenders Differ
Across the wholesale network, vacant-unit treatment falls into a few camps. Knowing which camp you are dealing with is half the battle.
| Approach | What the lender does | Question to ask |
|---|---|---|
| Appraiser rent | Counts market rent for the empty unit | Is vacant rent counted in full? |
| Signed lease | Wants a lease before crediting the unit | Will a lease be required to count it? |
| Discounted rent | Counts the unit at a reduced percentage | Is any haircut applied to vacant rent? |
| Leverage trim | Counts the rent but lowers the allowed LTV | Does a vacancy change my maximum leverage? |
Agency-style underwriting is known for applying a flat discount to rental income for vacancy. DSCR loans are non-agency, so that factor does not automatically carry over. That does not mean every lender skips a haircut. Some apply one, and some do not. Ask directly, and get the answer before you write the offer.
Lenders who want a lease are not being difficult. They want evidence that someone will actually pay the rent. Lenders who accept the appraiser’s number are betting the comps are right. Neither camp is wrong.
Purchase, Refinance, and Cash-Out Are Different Conversations
The same empty unit can be treated differently depending on the transaction.
| Transaction | Typical posture toward a vacant unit |
|---|---|
| Purchase | Most accepting; vacant but rent-ready is common |
| Rate-and-term refinance | Stricter; vacancies are scrutinized more |
| Cash-out refinance | Strictest; leasing first often helps |
A purchase is the friendliest setting. The seller had a unit empty, or just turned it over, and the lender expects that. Typical purchase leverage on an investment property runs 75%–80% LTV (loan-to-value, the loan as a share of appraised value), with select high-leverage programs reaching 85% for stronger credit. Subject to lender guidelines, none of that changes because one unit is empty.
Refinances are tighter. On a cash-out of a standard rental, leverage tops out around 75% LTV across most of the network, with about 6 months of seasoning as the common expectation. A vacant unit at that stage invites a request for a lease, a leverage trim, or both. Lendmire’s piece VA Cash-Out Requirements for a Fourplex With One Unit Vacant covers that angle for a different loan type. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Credit and reserves apply regardless. A 620 score is the floor in parts of the network, most programs want around 660, and 700+ unlocks the strongest leverage tiers. Reserves commonly run around 6 months of PITIA, stepping up to about 9 months on loans above $1,500,000. Those are typical ranges, and every file is underwritten individually. A bigger down payment helps the ratio, but it never erases a credit floor, a reserve rule, or a property eligibility limit. The strongest files clear both tests: enough equity and enough rental coverage.
DSCR vs. conventional financing
There are two common ways to finance an investment property, and they qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
Rent-Ready Condition and What Lenders Ask For
Condition decides more than rent does. When a unit needs work, the lender leans on condition, not rent. The borrower usually waits, finishes the work first, or uses short-term bridge financing.
A rent-ready unit is clean, functional, and listable today. A unit with a gutted kitchen is not. The appraiser can still give a market-rent opinion, but the lender may refuse to credit it until the work is complete.
For an occupied unit, the file needs a lease and a current rent roll. For the vacant unit, expect a request for an explanation of why it is empty and some evidence it is being marketed, such as a listing. A seller who lists a unit at an unrealistic number and leaves it empty for months makes a lender nervous. Brokers see this often: the number on a listing and the number the appraiser supports rarely match.
Passing the Test Is Not the Same as Cash Flowing
DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities, and capex all sit outside it. A fourplex can clear 1.00 and still lose money every month.
Here is the exposure. One empty unit in a fourplex is a loss of 25% of the rent. If a tenant leaves after closing, the lender’s math does not change, but your bank account does. The stress test above, with one unit at zero, is the honest picture of that risk. It is a better planning number than the headline ratio.
The stress test also sets reserves in perspective. Reserves exist so a vacancy or a repair does not become a missed payment. Treat the required months as a minimum, not a target.
Lease First, or Close With It Empty?
This is a genuine toss-up, and the answer depends on the unit and the lender.
Lease first when your lender wants a signed lease, when you are refinancing or cashing out, or when the market rent is close to what a tenant will actually pay. A real lease also helps the appraiser’s comp grid. The cost is a lease that may sit under market, which caps that unit’s counted rent.
Close with it vacant when you are purchasing, the unit is rent-ready, the lender credits market rent, and the ratio still clears without the lease. You keep flexibility to push rent to market.
Either way, decide before you apply. Lease it before you apply, or expect the lender to rely on the appraiser’s market-rent opinion. Switching strategies halfway through a file is how paperwork gets stale.
Where the Rule Breaks
The general rule has edges. These are the common ones.
- More than one vacancy. One empty unit is routine. Two or more turns the file into a lease-up conversation, with tighter leverage and more documentation, and some lenders step away.
- Low appraiser rent on the empty unit. With no lease to backstop it, the ratio rests on the comp grid alone. A thin comp set can drag the number down.
- Month-to-month tenants. With no term lease, the lender often falls back to market rent.
- Related-party tenants. A relative or business partner living in a unit draws market rent and closer review.
- Short-term rental use. Nightly rates multiplied by 30 are not market rent. A short-term rental follows its own program, with different leverage and a hosting history requirement, and short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income.
- Living in a unit. DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. If you plan to live in one unit, you are in a different product.
- Unit count. The building must be recognized as four legal units. An extra unit the appraiser does not count as a separate unit will not carry rent in the ratio.
- Five or more units. The review moves to net operating income.
- Ineligible property types. Manufactured homes, log homes, and barndominiums are not offered in these programs.
Pre-Offer Checklist
Ask the lender before you write an offer:
1. Is vacant rent counted at the appraiser’s market figure, or do you require a lease?
2. Is any haircut applied to rent on a vacant unit?
3. Does a vacancy change my maximum leverage or reserves?
4. How do you treat a unit that is rent-ready versus one that needs work?
5. What coverage floor does this program start at, and what is the path below it?
Have these ready: leases for every occupied unit, a current rent roll, a short written explanation of the vacancy, and listing evidence if the unit is being marketed.
Frequently Asked Questions
Does a vacant unit count as zero rent on a DSCR loan?
Often it does not. Many programs count the vacant unit at the appraiser’s market rent. Others require a lease, discount the vacant rent, or trim leverage. Treatment is program-dependent, so confirm it before you commit.
Can I qualify with one empty unit in a fourplex?
It is possible. A purchase with a rent-ready empty unit is the most common version. Eligibility review depends on the coverage ratio, credit, reserves, leverage, and property review. It is subject to lender guidelines, and no outcome is guaranteed.
Do I need a signed lease on the empty unit?
Some lenders require one, and many do not. Purchases are usually more flexible than refinances. A lease can help, but a below-market lease will cap that unit’s counted rent.
Does a fourplex handle vacancy better than a duplex?
Structurally, yes. One empty unit costs a fourplex 25% of its rent and a duplex 50%. That cushion improves the ratio, though it does not remove the risk.
Does clearing 1.00 mean the property cash flows?
No. The test compares rent to PITIA only, leaving out repairs, vacancy, management, utilities, and capex. Tax treatment varies; consult a qualified professional.
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage, and investor goals. As a broker, Lendmire arranges these loans through select lenders in its wholesale network across 41 markets, including Washington, D.C. For the full picture, read the complete DSCR loans guide.
Run the stress test before you fall for the fourplex, because the ratio you can live with is the one that still works with a unit empty.
About Lendmire
A DSCR-focused mortgage broker, Lendmire (NMLS# 2371349) places investor financing across 41 markets — 40 states plus Washington, D.C. — with DSCR eligibility generally reviewed by the lender on property cash flow instead of tax returns, subject to lender guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in 2025 and 2026.
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References
1. Fannie Mae Selling Guide B4-1.2-01
2. Fannie Mae Selling & Servicing Guide Forms
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Challenge a Low Appraisal on a DSCR Loan · How to Qualify for an Interest-Only DSCR Loan on 2-4 Unit Properties · Interest-Only DSCR Loan vs. 1099-Only Loan
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.