The Quick Read: It depends mostly on equity: on a duplex that carries a first mortgage, the line can reach a 70% combined loan-to-value at a 720 credit score or better, minus what you already owe, up to $500,000, and the rents of both units must then cover a stress payment on the whole line at 1.10x, subject to underwriting. Equity sets the ceiling. Rent decides whether the line passes at all. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
- On a non-owner-occupied duplex with a first mortgage, the second-lien ceiling is 70% combined loan-to-value (CLTV) at 720 or better, on lines up to $500,000.
- On a duplex with no mortgage, a first-lien line reaches 75% loan-to-value (LTV) at 740 or better, and 70% from 700 to 739, on lines up to $500,000.
- Lines start at $50,000, and at least 80% of the line is drawn at closing.
- Both units’ rents count together, and the test runs on the full credit limit, not just the drawn balance.
- The program is offered in Michigan, one of 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee.
Every figure here is a ceiling or floor under select wholesale programs, never an offer. Lendmire is a broker that arranges these lines. The wholesale lender reviews each file and makes the credit decision.
Key Terms Defined
You will see a handful of terms again and again. Here they are in plain words.
- DSCR (debt service coverage ratio): gross monthly rent divided by the payment the lender tests. This program asks for at least 1.10x.
- CLTV (combined loan-to-value): the first mortgage balance plus the new line, divided by the property’s value.
- Lien position: where a loan stands in line for repayment. A second lien sits behind your first mortgage. A first lien has no mortgage ahead of it.
- Draw period: the stretch when you can borrow from the line and pay interest only on what you drew.
- Repayment period: the stretch after the draw period, when you can no longer borrow and the balance pays down in full.
How Is the Maximum Line Sized?
The formula is short. Take the leverage ceiling, multiply it by the property’s value, then subtract the loan already recorded ahead of the line, which is the first mortgage if you keep one. What is left is the most the line can be, before the rent test and the line caps apply.
Across the wholesale network Lendmire places files with, the ceiling depends on lien position and credit score. Here is the program’s grid, subject to underwriting.
| Lien position | Credit score | Ceiling | Line size |
|---|---|---|---|
| Second lien (first mortgage kept) | 720 or better | 70% CLTV | Up to $500,000 |
| First lien (no mortgage) | 740 or better | 75% LTV | Up to $500,000 |
| First lien (no mortgage) | 700 to 739 | 70% LTV | Up to $500,000 |
| First lien (no mortgage) | 720 or better | 65% LTV | Over $500,000 to $1,000,000 |
Two details matter. Below 720, a duplex that keeps a first mortgage has no second-lien option. A first lien exists only on a rental with no mortgage, so a 700-to-719 borrower with a first mortgage is held back by the second-lien credit floor, not by the lien type. Also, the 65% ceiling applies to every first-lien line above $500,000.
Run the Percentages on a Duplex
Picture a duplex worth some value, call it V. Your first mortgage balance is 50% of V. At the 70% CLTV ceiling, the line can be up to about 20% of V.
Now take a duplex whose first mortgage is 65% of V. Only about 5% of V is left under the ceiling. That sliver may fall below the $50,000 minimum line, and then there is no line to write.
At 70% of V or more, there is no room at all. The ceiling is already used up.
Now take a duplex with no mortgage and a 740 score. The ceiling is 75% LTV, but the $500,000 cap on that tier may bind first on a high-value property. A larger line, up to $1,000,000, is possible only at 65% LTV and a 720 score. The cap and the ceiling each get a turn at being the limit. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
A third lien is never allowed, so on a second lien the line must be the only loan behind your first mortgage.
Does the Rent Test Cap the Line Too?
Yes, and this surprises many landlords. Equity gives you the ceiling, but the rent test runs on the entire credit limit. The qualifying payment is a fully amortizing payment on the full line at the start rate plus 2 percentage points, which is a deliberately stressful payment. Taxes and insurance are not part of it.
A bigger line means a bigger stress payment. So the rent has to clear 1.10x against a payment sized for the whole line. If equity says you can ask for a large line but the rent only supports a smaller one, the rent test becomes the binding limit. The lender’s own calculation governs the exact result.
How the Two Rents Combine
A duplex is an advantage here. The lender looks at gross monthly rent from both units and adds them together. One strong unit can offset a weaker one.
Rent is the lesser of the appraisal’s market rent and the lease, unless three months of receipts support a lease above market. A lease in place is required. A two-to-four-unit property may have at most 1 vacant unit, so a duplex with one empty side is reviewed carefully, subject to underwriting.
Here is a point you should confirm on your own file. On a second lien, ask how the lender treats the first-mortgage payment in the coverage calculation. The program does not give one fixed second-lien formula, so rely on what the lender tells you for your file.
If the ratio falls short, you have three practical levers. You can request a smaller line, raise the documented rent through a lease at market, or wait until the first mortgage balance shrinks and the numbers improve.
What Do You Actually Receive?
A line of credit is not a lump sum, but this one behaves almost like one on day one. 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 are at least $5,000 each.
The structure has three clocks.
- A 5-year draw period, interest-only on the drawn balance.
- A 25-year repayment period, fully amortizing.
- A 30-year maturity.
The rate is variable. Rate and pricing terms come with the lender’s HELOC disclosures, so read them before you sign.
The Consumer Financial Protection Bureau describes the same basic rhythm for home equity lines in general: you can generally spend up to your limit during the draw period, then you enter the repayment period. Plan for the change. When the interest-only years end, the payment on a balance you still carry gets larger.
Is There a Waiting Period?
Yes, and it has two parts. 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).
That is why a fresh purchase rarely has usable equity. A duplex bought with a normal investor down payment leaves a first mortgage large enough to eat most or all of the 70% ceiling. For a buy, rehab and refinance plan, Lendmire’s piece How to Qualify for a DSCR HELOC for a Warren MI Landlord With a Duplex walks through the steps, and a DSCR cash-out refinance is the other route to weigh.
What Will the Appraisal Look Like?
Valuation depends on line size. Lines up to $400,000 use an automated valuation with a confidence score of 85 or better, paired with a property inspection report, or a full interior appraisal. Lines above $400,000 take a full interior appraisal. Appraisal waivers are not accepted.
For a two-to-four-unit property, the standard appraisal form is the Small Residential Income Property Appraisal Report, Form 1025, according to the Fannie Mae Selling Guide. DSCR lines follow their own program rules, not agency rules.
The value in the formula is the appraised or automated value, not the price you paid or the number you hope for. A lower value shrinks the line dollar for dollar.
Which Duplexes and Borrowers Are Out?
- Owner-occupied duplexes. The line is for non-owner-occupied investment property only. If you live in one unit, it does not work, and it is never offered on your own home or a second home.
- Property types. Rural-designated property, row homes, condotels, leaseholds, land trusts, mixed-use property, and commercial or agricultural property are not eligible. A property listed for sale in the prior 2 months and a property with a solar lien are also out.
- Borrowers. U.S. citizens, permanent residents, and non-permanent residents with a Social Security number are eligible. Foreign nationals and ITIN borrowers are not.
- Declining markets. A declining-market flag lowers the ceiling by 5 points, subject to underwriting.
Can an LLC Hold the Duplex?
Yes. Vesting in your LLC is allowed on an investment property, subject to program terms. The LLC’s members sign as guarantors. If the title holder is not a borrower, that holder signs a non-borrowing owner acknowledgment and the security instrument. The borrowers on the line also need not be the borrowers on the first mortgage.
What Does the Borrower Need to Show?
The line qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. There is no traditional personal-income documentation: no W-2s, pay stubs, or personal debt-to-income ratio. Credit, rent, the lease, and the valuation are all still documented.
On credit, the program asks for the following, subject to underwriting.
- 720 or better on a second lien, and 700 or better on a first lien, using the lender’s own credit 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.
- No reserves and no cash to close.
- No more than 5 loans or $2,500,000 per borrower with the program.
The exposure limit matters for portfolio landlords. If you already have several loans with the same program, the next line may not fit. For the full picture of how requirements stack up across DSCR products, see Lendmire’s complete DSCR loans guide.
Why a Request Might Shrink
Before you apply, run through these reasons the number often comes in lower than hoped.
1. The appraised value lands under your estimate. 2. The first mortgage balance is higher than you remembered. 3. The credit score falls just under the tier you were counting on. 4. The rent test on the full limit fails, so the line has to shrink. 5. The market is flagged as declining, and the ceiling drops 5 points. 6. The available room falls under the $50,000 minimum. 7. The lease is below market, and market rent has to be supported by three months of receipts to count above it.
Line of Credit or Cash-Out Refinance?
A line of credit leaves your existing first mortgage alone. That is the main draw if your first mortgage is one you are happy to keep. A cash-out refinance replaces the first lien, which can reach different leverage, but it also means giving up the first mortgage you have now.
Opening a home equity line puts your property at risk. Consumer guidance on home equity lines is written for owner-occupants, but the idea carries over. You are pledging a second claim on a rental, and the draw requirement means you carry that balance from day one. Stacking a line on a high first mortgage thins your cushion, and a dip in value could leave you owing more than the duplex is worth.
Frequently Asked Questions
Does the rent decide how much I can borrow?
Rent decides whether the line qualifies and whether a given line size passes, but equity sets the ceiling. The ceiling is the leverage cap times the value, minus existing liens. Because the rent test runs on the full credit limit, a larger line needs more rent. Either limit can end up as the binding one.
Can I use a DSCR HELOC on a duplex I live in?
No. The line is for non-owner-occupied rentals only, so a house-hacking duplex where you live in one unit is outside it. Once the property is fully rented to tenants and you have moved out, it can be reviewed as an investment property, subject to underwriting.
How soon after buying can I open the line?
Two six-month clocks apply: the line is not available on a rental bought or refinanced in the last 6 months (last note date to new note date), and title must have been held for 6 months (settlement date to note date). In practice, a recent purchase also tends to have little equity left under the ceiling.
What happens if my first mortgage is already at 65% of value?
Very little room remains. At a 70% CLTV ceiling, only about 5% of value is left, which may fall under the $50,000 minimum line. At 70% or above, there is no room. In that case a cash-out refinance may be the better route to your equity.
Is Michigan covered?
Yes. Michigan is among the states where the program is offered, which are 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee. The property’s state is the first gate, so confirm it before you spend time on the math.
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. Reach Lendmire at 828-256-2183 or request a quote through the mortgage quote page. Programs change and every file is underwritten individually, so nothing here is a commitment to lend.
For a duplex, the number that matters most is the first mortgage balance as a share of value, because it tells you how much room is left before any rent test begins.
For current guidelines and terms, see Lendmire’s DSCR HELOC programs page.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) arranging DSCR home equity lines of credit — standalone first or second liens on non-owner-occupied one-to-four-unit rentals, qualified on rent — through a wholesale lending network in 15 of its 16 licensed states (every licensed state except Tennessee). Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
Get Started
Ready to find the right loan for you?
See your offer in seconds. No credit pull, no obligation.
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. Consumer Financial Protection Bureau
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 for a Steubenville OH Landlord Adding Rentals · DSCR HELOC Requirements for Approval Before an Appraisal · Can You Get a DSCR HELOC While Your Credit Is Frozen?
Guides: DSCR HELOC in Warren, MI · DSCR HELOC in Michigan
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.