The Quick Read: It depends on three limits, and the smallest one sets your line: the equity room under the combined loan-to-value ceiling, the program’s $500,000 cap on a second lien, and whether the rent counted covers the stress payment on the whole line at 1.10x. A vacant unit touches only the third limit, and only when its rent is not counted.
- A 2-4 unit rental may have at most one vacant unit, and a lease is required on the rest.
- A vacancy usually does not shrink your equity room. It can shrink the line the rent supports.
- If the vacant unit’s rent does not count, a smaller line can restore coverage.
- A vacant single-family rental does not meet the lease requirement.
- Everything here is subject to underwriting and select program guidelines.
Three Tests, and the Lowest Result Wins
Your maximum line is the lowest result of three separate tests. A DSCR HELOC is a revolving credit line secured by a rental you keep. Lendmire, a mortgage broker, places these lines through a wholesale lender in its network. The lender runs each test independently.
Test 1, leverage. Multiply the property’s value by the combined loan-to-value ceiling, then subtract the first mortgage balance. What remains is your equity room.
Test 2, the dollar cap. A second-lien line runs from $50,000 up to $500,000. A first-lien line on a rental with no mortgage can run to $1,000,000.
Test 3, coverage. Gross monthly rent divided by the qualifying payment must reach at least 1.10x. That payment is a fully amortizing payment on the entire credit limit, tested at a stress level above the starting rate. It covers principal and interest, not taxes and insurance.
Vacancy lives only in Test 3.
How Much Equity Room Do You Get?
On a second lien, combined loan-to-value (CLTV) can reach 70% on an investment property at a 720 credit score or better, with lines up to $500,000, subject to underwriting. CLTV adds the first mortgage balance and the full new line, then divides by value. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
Run it in percentages. Say the first mortgage sits at 50% of value. At a 70% ceiling, the line can use roughly 20% of value, if the dollar cap and coverage allow it.
The full line commitment counts toward CLTV. Drawn balance alone does not.
A first-lien line works differently, because a first lien exists only on a rental with no mortgage. Leverage reaches 75% loan-to-value (LTV) at 740 or better and 70% from 700 to 739, on lines up to $500,000. Lines above $500,000, up to $1,000,000, are capped at 65% LTV at 720 or better. A second lien has only the room left after the first mortgage. A free-and-clear rental can be sized against its whole value, up to those caps.
Condition matters too. A declining-market flag lowers the ceiling by 5 points, and Philadelphia lines carry a ceiling 10 points lower.
Where the Vacant Unit Actually Bites
The lender counts rent 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. For a 2-4 unit building, the appraiser documents a rent opinion for each unit on a standard small residential income property appraisal form built for two- to four-unit properties. DSCR files borrow the form as a standard way to document market rent. They are not agency loans.
The open question is the empty door. Across the wholesale lenders Lendmire works with, treatment varies. Some count the vacant unit at the appraiser’s market rent. Others leave it out of the rent total. Confirm on your file which treatment applies, and how the lender handles the first-mortgage payment when you are taking a second lien. Show yourself both cases before you apply.
If the vacant unit counts at market rent, coverage looks the same as it would fully leased. You may lose nothing. If it counts as zero, you lose that unit’s share of the rent.
The Math: Duplex, Triplex, Fourplex
Unit count changes the damage far more than it changes leverage. The table below is illustrative arithmetic only. It assumes equal unit rents and a building that covers 1.30x when fully leased on a given line.
| Building | Fully leased | Vacant unit counts $0 | Line size that restores 1.10x |
|---|---|---|---|
| Duplex | 1.30x | about 0.65x | about 59% of original |
| Triplex | 1.30x | about 0.87x | about 79% of original |
| Fourplex | 1.30x | about 0.98x | about 89% of original |
A fourplex at 0.98x falls just under the 1.10x minimum. A duplex at 0.65x is nowhere close.
The last column works because the stress payment is calculated on the full limit. Cut the line and the payment drops with it. Run the numbers on a duplex with a vacancy that counts as zero. The line would need to shrink by roughly 41% for coverage to clear.
That resizing has a limit. At least 80% of the line is drawn at closing, and the closing draw is never less than $50,000. On the smallest lines, the whole line is drawn at closing. You cannot open a large line, draw little, and let the unused part carry the coverage test.
Where the Rule Breaks
Some situations fall outside the one-vacancy allowance.
- Single-family or one-unit rental, vacant. A lease in place is required, so a vacant house does not meet the test.
- Two vacant units in a fourplex. That exceeds the limit of one. Leasing up first is the fix.
- A vacant unit that needs work. A rent-ready unit can be leased today. A unit needing real repairs is a different problem. Investors often use short-term bridge financing to finish the work and lease the unit before they come back to a line.
- A below-market lease. The lesser-of rule means a renewal at market rent can lift the rent you are credited with. The three-months-of-receipts exception covers the opposite case, a lease above market.
- An owner-occupied unit. This line is for non-owner-occupied rentals only. It is never written on your own home.
Some lenders also apply a vacancy haircut, which trims gross rent by a percentage. Ask whether the lender’s coverage calculation includes one.
What the Rest of the File Needs
The coverage test gets the attention, but the file has other requirements.
Credit comes first. A second lien needs a 720 score. A first lien needs 700. The lender pulls its own credit report. The mortgage history must show no 30-day late payment in the last 12 months. It must also show 48 months since any bankruptcy, foreclosure, short sale or deed-in-lieu. No reserves and no cash to close are required, subject to underwriting.
Value comes next. Lines up to $400,000 use an automated valuation with a property inspection report, or a full interior appraisal. Larger lines take a full interior appraisal. Appraisal waivers are not accepted.
Next is 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).
Exposure is capped at 5 loans or $2,500,000 per borrower with the program. Rural property, condotels, row homes, leaseholds and mixed-use buildings are outside it.
Documents are straightforward: the leases on the occupied units, a rent roll, the valuation, a credit report, and a condition summary for the vacant unit. The line qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. It does not use tax returns, W-2s or a personal income calculation. The LLC can stay on title, per lender program requirements. Members sign as guarantors.
In your first conversation, you can also read the program’s complete DSCR loans guide for the wider picture. For file-prep steps, Lendmire’s piece How to Qualify for an Investment Property HELOC With One Unit Vacant goes deeper on documents.
Should You Borrow the Maximum?
Not automatically. Passing 1.10x is not cash flow. Repairs, turnover, management, utilities and capital costs all sit outside the ratio. The rate is variable, so the payment can move after closing.
The coverage test happens at underwriting. After that, the payments are yours whether or not every unit stays leased. A line sized to the minimum can leave you little cushion if a second unit goes empty later.
Two levers help before you apply. Fill the vacancy and let the full rent roll carry the file. Or size the line down until the numbers work, and use a smaller draw than you wanted. On a fourplex, a modest line reduction can be enough.
It is a close call on a triplex. Waiting a month for a signed lease can beat resizing, though an investor with a firm need for the funds may prefer the smaller line.
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.
Key Terms Defined
DSCR (debt-service coverage ratio): the property’s rent divided by its qualifying payment, which shows whether the rent covers the debt.
CLTV (combined loan-to-value): all liens on the property, including the full new line, divided by its value.
Stress payment: the payment the lender uses to test coverage, calculated on the entire credit limit rather than the drawn balance.
Market rent: the appraiser’s opinion of what a unit would rent for today, documented unit by unit.
HELOC: an open-end credit line you can borrow against repeatedly during a draw period and then repay, as the Consumer Financial Protection Bureau explains. This program’s draw period is 5 years of interest-only payments on the drawn balance. A 25-year repayment period follows, with a 30-year maturity.
Frequently Asked Questions
Can I get a DSCR HELOC on a single-family rental that is vacant?
No. The program requires a lease in place, and a single-family rental has only one unit to lease. Lease the property first, then revisit the line. A two-to-four unit building has more flexibility, because it may have one vacant unit if the other units are leased.
What if two units in my fourplex are empty?
Two vacant units exceed the one-vacancy limit for a 2-4 unit property. Leasing one of them brings the building back inside the rule. Then the same coverage test applies, subject to underwriting.
Does a vacant unit reduce my equity room?
Usually not. Equity room comes from value, the CLTV ceiling and your first mortgage balance. Vacancy affects the coverage test, so it can reduce the line the rent supports without changing the leverage math.
Can I live in one of the units?
No. This line is only for non-owner-occupied rentals. A primary-residence HELOC is a different product with different rules.
Can I take a smaller line to pass the coverage test?
Yes, within the program’s limits. The stress payment is calculated on the whole credit limit, so a smaller line lowers it and raises coverage. Lines start at $50,000, and at least 80% is drawn at closing.
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. Qualification is subject to underwriting. This is not a commitment to lend.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving landlords and real estate investors in 16 licensed states. DSCR home equity lines of credit on non-owner-occupied one-to-four-unit rentals are arranged through wholesale lending channels in 15 of those states (every licensed state except Tennessee); Lendmire brokers the line and the lender underwrites each application on the property’s rent, credit and leverage. 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
This article is part of Lendmire’s DSCR HELOC program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much Can You Borrow on a DSCR HELOC as a Trucker With Equipment Costs? · DSCR HELOC Requirements for Sizing How Much Equity to Borrow · How Much Can You Borrow on a DSCR HELOC on That Property?
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.