The Quick Read: Usually the vacant unit does not shrink your line on its own, because the maximum is the lower of two limits: a combined loan-to-value ceiling set by lien position and credit score, and a rent-coverage test that runs on the whole credit limit, where the empty unit counts only if it is rent-ready and the appraiser supports its market rent. The vacancy matters only when it pushes coverage below the minimum. All figures below come through select programs in Lendmire’s wholesale network and are subject to underwriting.
- On a non-owner-occupied two-to-four-unit rental, at most one unit may be vacant. Two or more vacant units are not eligible, and neither is a unit the owner lives in.
- On a second lien behind your first mortgage, the ceiling is 70% CLTV at a 720 score or better, on lines of $50,000 to $500,000.
- On a first lien for a rental with no mortgage, the ceiling is 75% LTV at 740 or better, and 70% LTV from 700 to 739, on lines up to $500,000.
- Rent must cover a stress payment on the entire credit limit at a minimum of 1.10x.
- A vacant unit that needs real work is treated as having no supportable rent. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
What Sets How Much You Can Borrow on a DSCR HELOC?
Two ceilings set your line, and the lower one wins. The first is equity: how much combined debt the property can carry as a percentage of value. The second is rent: how big a line the rent can support at a 1.10x minimum.
A DSCR HELOC is a revolving line of credit secured by a rental you keep. It is written as a standalone second lien behind your first mortgage, or as a standalone first lien on a rental with no mortgage. The loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Tax returns, W-2s, pay stubs and a debt-to-income ratio are not part of the qualification, and the LLC can stay on title, depending on program guidelines.
The empty unit touches only the second ceiling. It lowers the rent side of the test if it counts for little or nothing, and it leaves the equity side alone. For the full picture of how these loans work, see Lendmire’s complete DSCR loans guide.
How Do You Size the Equity Ceiling?
Take the property’s value, multiply by the combined loan-to-value cap, and subtract what you owe on the first mortgage. What remains is the most the equity allows. The line itself is open-end credit you can borrow against repeatedly, and the federal consumer-finance regulator describes equity as value minus what you owe. Its older HELOC booklet explains the same idea: the limit is typically a percentage of the home’s value, less the existing mortgage.
The caps depend on your lien position and credit score, subject to underwriting:
- Second lien: up to 70% CLTV at 720 or better, on lines from $50,000 to $500,000. Below 720 there is no second-lien tier.
- First lien on a rental with no mortgage: up to 75% LTV at 740 or better and 70% LTV from 700 to 739, on lines up to $500,000. Lines above $500,000 and up to $1,000,000 are capped at 65% LTV at 720 or better. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
Combined means the first mortgage balance plus the new line, divided by value. A declining-market flag lowers the ceiling by 5 points. The table below shows how quickly the room disappears on a second lien:
| First mortgage as % of value | Room under 70% CLTV | Room if flagged (65%) |
|---|---|---|
| 40% | 30% of value | 25% of value |
| 50% | 20% of value | 15% of value |
| 60% | 10% of value | 5% of value |
Run your own numbers against that. Lines start at $50,000, so thin room can fall below the minimum line size before rent even enters the picture.
How Does the Rent Test Treat the Empty Unit?
The rent test runs on the entire credit limit, not on what you draw. Gross monthly rent is divided by a stress payment: a fully amortizing payment on the whole limit at the start rate plus 2 percentage points. That payment covers principal and interest only. Taxes and insurance are not part of it. The minimum is 1.10x.
Because the full limit drives the stress payment, a bigger line lowers coverage. The vacant unit’s rent matters most when you size the line near the maximum.
Here is how each unit’s rent is counted. Rent is the lesser of the appraisal’s market rent and the lease, unless three months of receipts support a lease above market. For a 2–4 unit property, the appraiser reports market rent on a per-unit schedule. That is the Form 1025, a form non-QM programs borrow from the agency world.
A lease is required on the occupied units. The vacant unit has no lease, so the appraiser’s market rent is what can stand in. In Lendmire’s worked example, a four-unit with one empty unit counted at market rent lands near 1.30x and clears the 1.10x minimum. Whether the first-mortgage payment joins the qualifying payment on a second lien is something to confirm on the file, because the lender’s own coverage calculation governs.
Three conditions decide whether the empty unit helps:
1. It must be rent-ready. A unit that needs real work is treated as having no supportable rent. The usual routes are finishing the repairs first or using a bridge loan.
2. The appraiser must support the market rent. Your pro forma does not count. The appraisal schedule and the leases do.
3. The unit count must match. Rent is generally not credited for an unpermitted unit or a unit-count mismatch.
Do not assume every lender treats vacancy this way. Some apply haircuts to vacant-unit rent, and others allow no vacancy at all. This article describes the network’s treatment only.
Duplex, Triplex or Fourplex: What One Vacancy Costs
A duplex has the thinnest margin, and a fourplex has the thickest. One empty unit is half the rent in a duplex, a third in a triplex and a quarter in a fourplex.
The table shows the worst case, where the empty unit earns nothing. Say all units rent equally and the fully leased building starts at 1.30x. This is illustrative arithmetic, not a sourced market figure, and the lender’s calculation governs.
| Property | Rent from the vacant unit | Coverage if it earns nothing | Against 1.10x |
|---|---|---|---|
| Duplex | 50% | about 0.65x | Short |
| Triplex | 33% | about 0.87x | Short |
| Fourplex | 25% | about 0.98x | Short |
If the unit counts at supported market rent, coverage stays at the fully leased level in this simplified picture. That is why Lendmire’s worked example clears. The gap between the two columns is the cost of an unsupported vacancy.
The fourplex is the useful one to study. At about 0.98x it misses 1.10x, but only by a modest margin. Payment on the full limit moves roughly in step with the line size, so a line about 11% smaller would bring that building back to the minimum. A duplex or triplex would need a much larger cut, which is why those buildings are tougher with an unsupported vacancy.
Lease First, Borrow Less, or Use Something Else?
You have three paths, and the right one depends on the gap between your coverage and 1.10x.
Lease the unit before the appraisal. A signed lease at market rent gives the file a documented number, and the appraiser can support it. If the unit is nearly rent-ready, this often costs little, and it can widen the line. A month-to-month or expired lease on an occupied unit leans on market rent, so renewing at documented market rent helps there too.
Take a smaller line now. Size the line to your plan, not to the ceiling. Draws have rules: at least 80% of the line is drawn at closing, the closing draw is never less than $50,000, and later draws are at least $5,000 each. A big line you plan to leave idle does not fit the structure. A smaller line passes the test more easily.
Use a different product. A fully vacant property cannot qualify, because a lease in place is required. Two or more vacant units are out as well. A first-lien DSCR cash-out refinance is a separate product with its own rules and may fit better. If your paperwork shows income better than your rent roll does, Lendmire’s piece How to Qualify for a Bank Statement HELOC on a Multi-Unit Home With One Unit Vacant covers that route.
One honest toss-up: waiting a month to lease the unit gives a bigger line, while borrowing now gives you cash sooner. Your own coverage figure should settle it. If you clear 1.10x with room to spare, borrow now. If you sit near the minimum, the lease is worth the wait.
What Else Can Cap the Line?
Several file items can lower the line or end the application, all subject to underwriting.
- Credit. The minimum is 720 on a second lien and 700 on a first lien. The lender’s own credit report sets your tier. The mortgage history must show no 30-day late in the last 12 months, and 48 months must have passed since a bankruptcy, foreclosure, short sale or deed-in-lieu.
- Valuation. Lines up to $400,000 use an automated valuation with a property inspection report, or a full interior appraisal. Larger lines need a full interior appraisal. Appraisal waivers are not accepted.
- Seasoning. A rental bought or refinanced inside the last 6 months is not eligible (that clock runs from the last note date to the new note date), and you must have held title for 6 months (settlement date to note date).
- Exposure. The program allows at most 5 loans or $2,500,000 per borrower.
- Property. Rural-designated property, condotels, row homes, leaseholds and a property listed for sale in the prior 2 months are outside this lane. So is a property with a solar lien.
- Reserves. No reserves and no cash to close are required on the line.
The program is offered in 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee. 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.
Two risks sit beyond the vacancy. The rate is variable, and the draw period is 5 years of interest-only payments on the drawn balance, followed by a 25-year repayment period inside a 30-year maturity. The CFPB notes that HELOC payments depend on the balance and that the draw period ends. Consumer HELOC protections are written for a borrower’s own home. Do not assume they apply to a rental.
Key Terms Defined
DSCR (debt service coverage ratio): gross monthly rent divided by the qualifying payment, which shows whether the rent covers the debt.
CLTV (combined loan-to-value): the first mortgage balance plus the new line, divided by the property’s value.
Stress payment: the payment the lender uses to test coverage. It is calculated on the entire credit limit at a higher-than-start rate, and it is not the payment you will actually make.
Rent schedule: the appraiser’s unit-by-unit market rent report, filed on the Form 1025 for 2–4 unit properties.
Draw period: the first 5 years of the line, when you borrow against it and pay interest only on the drawn balance.
Frequently Asked Questions
Can the empty unit’s rent count toward the line?
Yes, when the unit is rent-ready and the appraiser supports its market rent. In Lendmire’s worked example, a four-unit with one unit empty counted at market rent lands near 1.30x. Occupied units use the lesser of market rent and the lease, unless three months of receipts support a lease above market.
Is a duplex with one vacant unit harder than a fourplex?
Yes. With one of two units empty, half the rent is unleased, so coverage is thinner. Triplexes and fourplexes spread the risk across more units. If the empty unit earns nothing in the test, a duplex falls short far more sharply than a fourplex.
What if two units are empty, or I live in one?
Both cases are outside this program. A 2–4 unit property may have at most one vacant unit, and the property must be non-owner-occupied. A first-lien DSCR cash-out refinance has its own rules and may fit a different situation, subject to lender guidelines.
Does coverage run on what I draw or on the whole line?
It runs on the whole credit limit. The stress payment is calculated on the entire limit, so a larger line lowers coverage even if you draw less. That is why sizing the line to a plan matters.
Can I put the property in an LLC?
Yes, depending on program guidelines. The LLC can hold title to the investment property, and the members sign as guarantors. A title holder who is not a borrower signs a non-borrowing owner acknowledgment and the security instrument.
Next Steps for Your Rental
If you are considering a home equity line on a rental property and want to see how the numbers work, Lendmire can help you compare DSCR HELOC options based on the property, the rent, the equity available, credit profile, combined leverage, and your goals. Lendmire is a broker, not a lender. Programs change, every file is underwritten individually, and nothing here is a commitment to lend.
About Lendmire
Lendmire, NMLS# 2371349, is a mortgage brokerage with consumer lending licenses in 16 states. It arranges DSCR home equity lines of credit on rental property through wholesale lending partners in 15 of its 16 licensed states (every licensed state except Tennessee); each line is written on a non-owner-occupied one-to-four-unit rental and reviewed individually by the lender under the program’s credit and leverage guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
This article is part of Lendmire’s DSCR HELOC program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: DSCR HELOC Requirements With Irregular Deposits · How Much Can You Borrow With a DSCR HELOC After Switching an Airbnb to a Long-Term Rental? · How a DSCR HELOC Works as a First-Time Landlord on Your Old Home
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.