The Quick Read: A DSCR HELOC can work on a two-to-four unit rental with one unit vacant, because the line is qualified on the building’s rent rather than your income, and this program allows at most one vacant unit with a lease in place on the others. The catch is coverage. The empty unit’s rent may drop out of the test, and the ratio still has to reach 1.10x on a stress payment over the whole line, subject to underwriting.
- One vacant unit is allowed. Two or more vacant units make the building ineligible.
- Allowed does not mean qualified. The coverage ratio is a separate test, and a duplex feels one empty unit far more than a fourplex does.
- Rent counts at the lesser of the appraiser’s market rent and the lease, with one exception for above-market leases backed by receipts.
- The coverage test runs on the entire credit limit, not just the part you draw.
- Leasing the empty unit before you apply is the most direct fix.
What a DSCR HELOC Is on a Small Rental
A DSCR HELOC is a revolving line of credit secured by a non-owner-occupied rental you keep. It is written as a standalone second lien behind the first mortgage you keep, or as a standalone first lien on a rental with no mortgage. The rent qualifies the line, and your personal income does not.
DSCR stands for debt service coverage ratio. It is the property’s gross monthly rent divided by the qualifying payment. A ratio of 1.10x means the rent covers that payment with 10% to spare. Through select programs in Lendmire’s wholesale network, that 1.10x is the minimum, and the lender’s own calculation governs.
Qualifying on the rental’s income means no traditional personal-income documentation, W-2s, or personal income calculation, subject to lender guidelines. The rent, the lease, the credit report, and the valuation are all documented. The LLC can stay on title, subject to program terms. Members sign as guarantors, and the borrowers on the line need not be the borrowers on the first mortgage.
Lendmire is the broker here. It arranges the line through a wholesale lender in its network, and that lender reviews and approves the file. The program is offered in 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee. For the broader picture of how rent-based lending works, Lendmire’s complete DSCR loans guide covers the basics.
The label itself is loose. DSCR HELOC is a market name, not one standard product, so details differ from lender to lender. Everything below describes the programs placed through Lendmire’s network, and the figures are ceilings and floors, never offers.
How Underwriting Treats the Building, Step by Step
Underwriting treats a partly vacant building as a rent-roll problem. The lender screens the property, counts rent unit by unit, tests coverage on the full line, and then checks leverage. Vacancy matters at two of those steps, and the two tests are separate.
Step 1: The eligibility screen. The property must be a non-owner-occupied rental. Rural-designated property, mixed-use property, and anything listed for sale in the prior two months fall outside the program. On a two-to-four unit building, at most one unit may be vacant.
Step 2: The valuation. Lines up to $400,000 use either an automated valuation (confidence score of 85 or better) with a property inspection report, or a full interior appraisal. Lines above $400,000 take a full interior appraisal. On a multi-unit building that appraisal is on the small income property form, and it carries a rent schedule for each unit. Appraisal waivers are not accepted.
Step 3: Rent counted, unit by unit. Rent is the lesser of the appraisal’s market rent and the lease, unless three months of receipts support a lease above market. The lender reads this from a rent roll that lists every unit, tenant, rent, and lease end date. If your building sits under rent control, that can limit the appraiser’s market-rent conclusion, which in turn limits coverage.
Step 4: The vacant unit. A vacant unit has no lease. The program requires a lease in place on the other units. The empty unit’s rent is therefore only the appraiser’s opinion of market rent, and how it enters the test depends on the lender’s coverage calculation. Some lenders count it at market rent. Others drop it out entirely. Confirm the treatment with your broker before you apply, because it can move the ratio a long way.
Step 5: The coverage test on the whole line. The qualifying payment is a fully amortizing payment on the entire credit limit at a stressed rate. It covers principal and interest only. Taxes and insurance are not part of it. A larger line therefore raises the bar, even if you plan to draw only part of it.
Step 6: The leverage test. Combined loan-to-value (CLTV) is your first mortgage balance plus the new line, divided by the property’s value. The ceiling in the next section applies whatever the rent says.
What One Empty Unit Costs on a Duplex, Triplex, and Fourplex
One vacant unit removes a share of rent equal to one divided by the number of units. That share is biggest on a duplex, so a duplex with an empty unit is nearly always a coverage problem. A fourplex absorbs the same vacancy far better.
Take a modeled building that covers about 1.3x with every unit counted at equal rents. This is an assumption for illustration, not a market figure, and it assumes the vacant unit’s rent drops out of the test completely:
| Building | Rent left in test | Modeled ratio |
|---|---|---|
| Duplex, 1 vacant | One half | About 0.65x |
| Triplex, 1 vacant | Two thirds | About 0.87x |
| Fourplex, 1 vacant | Three quarters | About 0.98x |
Even the fourplex lands just under 1.10x. That is an illustration built on equal unit rents, not a general figure.
Now change one assumption. If the lender counts the empty unit at the appraiser’s market rent, the same duplex tests near its full 1.3x. The building did not change. Only the lender’s treatment of the vacant unit did, which is why the question is worth asking early.
Bank-style analysis works differently from this rent-over-payment test. The OCC’s examination handbook defines the ratio as net operating income divided by total debt service, with vacancy and collection losses built into the income figure. Rent-based investor programs divide rent by the payment. Some programs also apply their own vacancy percentage, and others use gross market rent. Ask which approach your lender uses before you compare ratios.
Coverage or Leverage: Which Limit Binds?
Your first mortgage balance decides which test limits the line. If the first mortgage is already high against value, the CLTV ceiling stops you before coverage does. If the first mortgage is low, coverage becomes the limit.
Say your first mortgage sits at 60% of value. A second lien tops out at 70% CLTV, so only about 10 points of value remain for the line. Leverage binds, and a vacant unit is a secondary worry. Say your first mortgage sits at 30% of value. Now there are roughly 40 points of room, and the stress payment on a large line is what binds. That is where an empty unit does its damage.
Sizing the line down is a legitimate lever. Because the test runs on the full limit, a smaller line lowers the qualifying payment and can restore coverage on a building that fails at a larger size. Lines start at $50,000.
Structures and Draw Rules
Two structures exist, and the leverage tiers differ for each. All leverage figures below are for non-owner-occupied investment property, through select programs and subject to underwriting.
Second lien, behind a first mortgage you keep. Combined loan-to-value runs up to 70% at a 720 credit score or better, on lines up to $500,000. Below 720 there is no second-lien option. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
First lien, on a rental with no mortgage. Loan-to-value runs up to 75% at 740 or better and 70% at 700 to 739, on lines up to $500,000. Lines above $500,000 run to $1,000,000, and those carry a 65% ceiling at 720 or better. A declining-market flag can lower any ceiling by 5 points.
The draw rules are the same either way:
- The draw period is five years, interest-only on the drawn balance.
- A 25-year fully amortizing repayment period follows, for a 30-year maturity.
- The rate is variable.
- At least 80% of the line is drawn at closing, and the closing draw is never less than $50,000. On the smallest lines, that means the whole line is drawn at closing.
- Later draws must be at least $5,000 each.
A line of credit is revolving, open-end credit secured by the property. As the CFPB’s explanation of home equity lines puts it, you draw up to a limit during a draw period, and the line then moves to repayment. Plan around the repayment period, since payments rise once it begins.
What the File Needs
The file is lighter than a personal-income file and stricter on the property. Here is what the wholesale lender looks at:
- Credit: 720 minimum on a second lien and 700 on a first lien, using the lender’s own report. No 30-day mortgage late in the last 12 months. At least 48 months since a bankruptcy, foreclosure, short sale, or deed-in-lieu.
- 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 the owner must have held title for 6 months (settlement date to note date).
- Reserves and cash to close: None required.
- Exposure: At most 5 loans or $2,500,000 per borrower with the program.
- Borrowers: U.S. citizens, permanent residents, and non-permanent residents with a Social Security number. Foreign nationals and ITIN borrowers are not eligible.
- Property types outside the lane: Row homes, condotels, leaseholds, land trusts, commercial or agricultural property, and properties with a solar lien. Hazard insurance covers both liens.
The vacant unit is rarely the only thing a lender questions. Lease terms above the appraiser’s market rent, a rent roll that does not match the leases, and a line sized larger than the rent can support all draw attention.
Where the Rule Breaks
The one-vacant-unit rule holds in most cases, but several situations change the answer.
| Situation | How it reads |
|---|---|
| Two or more units vacant | Ineligible on this program |
| You live in one unit | Owner-occupied, so outside this product |
| Whole building vacant | No lease in place, so not eligible until leased |
| Unit between tenants | Allowed if it is the only vacancy, but weak |
| Unit offline for renovation | Possible, though a gut rehab is a poor fit |
| Lease above market rent | Counts only with three months of receipts |
You live in one unit. The property becomes owner-occupied, and a DSCR HELOC is never offered on an owner-occupied home. The usual path is to move out, rent every unit, and apply after the seasoning clocks have run.
The whole building is empty. A lease in place is required, so a vacant rental waits until it is leased. If you are buying, a DSCR purchase loan or a first-lien cash-out may fit better than a line.
A unit is offline for work. A DSCR HELOC is not construction money, and it does not fund draws for a rehab. One unit offline may be workable, but a unit between tenants with a new lease coming is a stronger story than a unit gutted to the studs.
You own other rentals. Each property runs as its own file. A duplex with one vacancy can sit alongside other rentals in your portfolio, within the cap of 5 loans or $2,500,000 per borrower.
A unit goes vacant after closing. The coverage test happens at application. What a later vacancy means for your line is a question for the loan documents, so read them before you sign.
Lease It First, or Apply Now?
Lease first whenever you can. A signed lease puts that unit’s rent into the test and removes the lease-in-place problem in one move. If the empty unit is the difference between 0.98x and the 1.10x minimum, a lease is worth more than any other fix.
Apply now only when the numbers already work with the empty unit treated as zero. A good test is to run the building two ways: with the vacant unit at appraiser’s market rent, and with it at nothing. If the ratio clears 1.10x both ways, the lender’s treatment will not matter. If it only clears one way, you are relying on a choice that is not yours to make.
Whatever the order, the lease must be a real one. A lease above the appraiser’s market rent counts only with three months of rent receipts behind it, so a brand-new lease signed at a stretch price will not help.
Is a DSCR HELOC the Right Tool Here?
It is the right tool when you want to keep a first mortgage you like and pull equity out without opening your personal income file. It is the wrong tool when the building cannot meet a 1.10x test or when most of the equity is already spoken for by the first mortgage.
The alternatives have their own rules. A DSCR cash-out refinance replaces the first mortgage with a new loan, so it can make sense when the existing first mortgage is not worth keeping. An investment-property HELOC qualified on personal income uses that program’s income rules, and so does a bank statement HELOC, which is reviewed on documented deposits. Lendmire’s piece How to Qualify for a Bank Statement HELOC on a Multi-Unit Home With One Unit Vacant walks through that route. NerdWallet’s overview of HELOCs on investment property notes that these lines are not offered by all lenders, carry strict requirements, and come from a smaller lender pool than a primary-home HELOC. That is a reason to ask a broker who sees many lenders’ guidelines, not to give up.
Pre-Application Checklist
1. Count the vacant units. If it is more than one, stop and lease one first.
2. Build a rent roll listing every unit, tenant, rent, and lease end date.
3. Gather copies of every signed lease and, for any lease above market, three months of rent receipts.
4. Confirm you do not live in any unit and have not listed the property for sale in the last two months.
5. Check the seasoning clocks against your purchase and refinance dates.
6. Run your own coverage test with the vacant unit at market rent and at zero.
7. Estimate your combined leverage using your first mortgage balance and a realistic value.
8. Ask your broker how the lender treats the vacant unit and the first-mortgage payment before you apply.
Common Mistakes
Assuming allowed means approved. The vacancy rule and the coverage test are separate. A building can pass one and fail the other.
Using optimistic market rent. The appraiser, not you, sets market rent. If your lease runs above it, the figure that counts may be the lower one.
Testing coverage on the drawn balance. The lender tests the full credit limit. A line you plan to draw lightly still sizes the stress payment.
Forgetting leverage. Strong rent does nothing if the first mortgage already uses most of the 70% CLTV ceiling.
Applying with a lease gap. If the other units are not leased, the program’s lease-in-place requirement is not met, whatever the ratio says.
Key Terms Defined
DSCR: The property’s gross monthly rent divided by the qualifying payment. The program minimum is 1.10x.
Second lien: A loan recorded behind your first mortgage. It is paid after the first mortgage if the property is ever sold to satisfy debts.
CLTV: Combined loan-to-value. It is the first mortgage balance plus the new line, divided by the property’s value.
Stress payment: The payment the lender uses to test coverage, calculated on the full credit limit at a stressed rate. It is not the payment you actually make.
Draw period: The five years when you can borrow against the line and pay interest only on what you have drawn.
Rent roll: A list of every unit with its tenant, monthly rent, and lease end date.
Frequently Asked Questions
Does one vacant unit disqualify me from a DSCR HELOC?
No, not on this program. A two-to-four unit building may have at most one vacant unit, as long as the other units are leased. The coverage test is still separate, so the ratio must reach 1.10x, subject to underwriting.
Is the vacant unit counted as zero rent?
It depends on the lender’s coverage calculation. Some lenders count the empty unit at the appraiser’s market rent, and others drop it out of the test. The difference can move a duplex from passing to failing, so confirm the treatment with your broker before you apply.
What if two units are vacant?
The building is ineligible on this program. A lease in place is required, and two or more vacant units fall outside the limit. Leasing one unit first brings the building back within the rule, and the coverage test then runs on the leased rent.
Does a DSCR HELOC work on a duplex with one unit empty?
It is possible but hard. A vacancy removes half the rent from the test on a duplex, so coverage usually fails unless the lender counts the empty unit at market rent. A signed lease on the empty unit is the cleaner fix.
What if the ratio comes in below 1.10x?
You have three levers. Lease the empty unit, reduce the size of the line, or check whether the first-lien structure fits if the rental has no mortgage. Each changes the test, and the lender’s own calculation governs the result.
Next Step
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. You can reach the team at 828-256-2183.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps landlords and real estate investors open DSCR home equity lines of credit on their rentals — lines qualified on the property’s rent, never on the owner’s own home — through wholesale lenders in 15 of Lendmire’s 16 licensed states (every licensed state except Tennessee). Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. OCC Examination Handbook, Section 210 Appendix A
2. CFPB’s explanation of home equity lines
3. NerdWallet’s overview of HELOCs on investment property
This article is part of Lendmire’s DSCR HELOC program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does a DSCR HELOC Make Sense for Home Improvements Instead of a Renovation Loan? · Can You Get a DSCR HELOC After Taking Your Home Off the Market? · DSCR HELOC Requirements for Using Home Equity on College Tuition
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.