The Quick Read: It depends on your building’s value, what you still owe, and your credit score. On a second lien, the line plus your first mortgage can reach up to 70% of value (combined loan-to-value, or CLTV) at a 720 score or better, with lines from $50,000 up to $500,000, subject to underwriting. The rent must also cover a stress payment on the whole line.
- Second lien: up to 70% CLTV at 720 or better, lines to $500,000.
- First lien (no mortgage on the rental): up to 75% loan-to-value (LTV) at 740 or better, 70% from 700 to 739, and 65% on lines above $500,000.
- Rent test: minimum 1.10x coverage on the entire credit limit, not just what you draw.
- Unit count: a duplex, triplex and fourplex are all eligible, with at most 1 vacant unit.
- Footprint: offered in 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee.
All figures are ceilings, not offers. They come through select programs in Lendmire’s wholesale network and depend on lender guidelines.
What Is the Formula for Your Maximum Line?
Your maximum line is the building’s value times the allowed combined leverage, minus every lien already on it. Then the program’s dollar limits and the rent test trim the result. That is the same sizing method consumer guidance describes: a percentage of appraised value, minus what you owe (CFPB HELOC booklet).
Here is the shape of it on a second lien:
1. Take the appraised value. 2. Multiply by 70%. 3. Subtract your first mortgage balance. 4. Compare the result to the $500,000 ceiling and the $50,000 floor. 5. Run the rent test on the full line.
The lowest answer wins. Equity sets the first limit. Rent coverage sets the second. The program’s line floor sets the third.
Notice that the number of units does not appear in the formula. A fourplex does not get a higher or lower percentage than a duplex. Units matter indirectly, through rent, appraisal and vacancy, which we cover below.
How Does a Second Lien Differ From a First Lien?
A second lien sits behind a first mortgage you keep. A first lien is only possible when the rental has no mortgage. The two use different leverage tiers, so know which one you are in before you do any math.
| Factor | Second lien | First lien |
|---|---|---|
| Situation | You keep your first mortgage | Rental has no mortgage |
| Leverage measure | CLTV (first mortgage plus line) | LTV |
| Top tier | 70% at 720+ | 75% at 740+ |
| Middle tier | None below 720 | 70% at 700 to 739 |
| Larger lines | Not offered above $500,000 | 65% at 720+ above $500,000 |
| Line range | $50,000 to $500,000 | $50,000 to $1,000,000 |
| Credit floor | 720 | 700 |
The first-lien ceiling of 75% applies only to lines up to $500,000. Anything above that drops to 65%, with lines running to $1,000,000.
Why Does the Existing Mortgage Eat the Room?
On a second lien, every dollar of first mortgage uses up the same 70% allowance your new line draws on. A larger balance leaves a smaller line, and a balance near the cap leaves nothing.
Run the numbers on a building worth $800,000. Seventy percent of that is $560,000 of total allowed debt. If your first mortgage is about 40% of value, roughly 30 points of value remain for the line. If the first mortgage is already near 70%, the room is gone.
Now picture three owners of a duplex, triplex and fourplex, each worth the same and each with the same first mortgage. Equity room is identical for all three. The unit count changes only what happens in the other tests. That is the point of working through equity first.
How Does the Rent Test Limit the Line?
The rent test requires gross monthly rent to cover a stress payment at least 1.10 times over. That payment is a fully amortizing payment on the entire credit limit, at the start rate plus 2 percentage points. It includes principal and interest only. Taxes and insurance are not part of it.
Two details of the rent test are worth keeping in mind.
The test uses the full line. You may draw only part of it, but the stress payment still assumes the whole limit. A larger line raises the payment the rent must cover.
The rent figure is conservative. 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, and a two-to-four-unit property may have at most 1 vacant unit.
On a second lien, confirm on the file how the lender treats the first-mortgage payment in its coverage calculation. The lender’s own calculation governs, and any example here is illustrative.
So when does rent, not equity, cap your line? When the building has plenty of equity but modest rents. A fourplex with four leased units generally spreads income across more tenants than a duplex does. A duplex with one vacant unit, though, loses half its rent, and a duplex is allowed that one vacancy under the program. Check that your rent roll supports the whole line you want.
What Limits Does a Duplex, Triplex and Fourplex Face?
Unit count changes the risk profile, not the leverage tier. The ceilings above apply to all three. What differs is how each building tests on rent and how it appraises.
| Factor | Duplex | Triplex | Fourplex |
|---|---|---|---|
| Leverage tier | Same | Same | Same |
| Max vacant units | 1 | 1 | 1 |
| Share of rent lost per vacancy | About half | About a third | About a quarter |
| Full appraisal form | 1025 | 1025 | 1025 |
Notice the vacancy row. The program allows one vacant unit in any of the three, but the vacancy hurts the rent test far more in a duplex. Five or more units is commercial property and outside this program.
What Does the File Need?
The file is built around the rental, not your personal income. 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 or personal income calculation. The rent, the lease, your credit report and the valuation are all documented.
Typical requirements:
- Credit: 720 minimum on a second lien, 700 on a first lien, using the lender’s own credit report.
- Mortgage history: no 30-day late in the last 12 months, and 48 months since a bankruptcy, foreclosure, short sale or deed-in-lieu.
- Reserves and cash to close: none required.
- Valuation: lines to $400,000 use an automated valuation (confidence score 85 or better) with a property inspection report, or a full interior appraisal. Larger lines need a full interior appraisal. Appraisal waivers are not accepted.
- Exposure: at most 5 loans or $2,500,000 per borrower with the program.
- Lease: required, with at most 1 vacant unit.
Seasoning has two clocks. 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).
Investment-property HELOCs from lenders often carry stricter documentation and reserve rules, and multiple appraisals can be required, per NerdWallet. This program is different: no reserves are required, subject to underwriting.
Can an LLC Hold Title?
Yes. Vesting in your LLC is allowed on an investment property. The members sign as guarantors, and a title holder who is not a borrower signs a non-borrowing owner acknowledgment and the security instrument. The borrowers on the line need not match the borrowers on the first mortgage. This is subject to program guidelines.
That is a real difference from many bank lines. If your buildings sit in an LLC, a rent-qualified line avoids a re-titling step.
How Do Draws and Repayment Change What You Can Use?
The line is not fully flexible at closing. 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.
Then the clock runs:
- Draw period: 5 years, interest-only on the drawn balance.
- Repayment period: 25 years, fully amortizing.
- Maturity: 30 years.
- Pricing: variable rate. The rate and the pricing terms come with the lender’s disclosures.
When Does Your Line Come Out Smaller Than Expected?
Usually one of four things binds. Work through them in order.
1. Equity. The first mortgage uses up the 70% CLTV allowance. Fix: wait, pay down the first mortgage, or look at a different structure.
2. Rent coverage. The stress payment on the full line pushes coverage below 1.10x. Fix: ask for a smaller line, or document higher rent.
3. Credit tier. A score under 720 removes the second-lien option entirely. A first-lien borrower under 740 falls to 70%.
4. Valuation. A declining-market flag lowers the ceiling 5 points, and Philadelphia lines carry a ceiling 10 points lower.
Also check the exclusions. Rural-designated property, row homes, condotels, mixed-use, leaseholds, land trusts, a property listed for sale in the prior 2 months and a property with a solar lien are all outside this lane.
Another reality check: the lender can reduce or freeze a line if the property’s value falls substantially (CFPB booklet). The limit is a ceiling that can move.
DSCR HELOC or Cash-Out Refinance?
It comes down to whether you want to keep your first mortgage. A line leaves the first mortgage untouched and borrows only against the equity. A DSCR cash-out refinance replaces the first mortgage with a new one. Those are different programs with their own rules.
Keep the line if your existing first mortgage is one you want to hold on to. Look at the refinance if you also want to change that loan. Lendmire’s complete DSCR loans guide walks through the broader choices, and the page on pulling cash out of a rental with a DSCR cash-out refinance covers that side in detail.
Key Terms Defined
DSCR (debt service coverage ratio): gross monthly rent divided by the qualifying payment. Here the minimum is 1.10x.
CLTV (combined loan-to-value): your first mortgage balance plus the new line, divided by the property’s value.
Stress payment: a fully amortizing payment on the whole credit limit at the start rate plus 2 percentage points, used only to test coverage.
Draw period: the stretch when you can borrow from the line and pay interest only on what you have drawn. Here it is 5 years.
Second lien: a loan that sits behind your first mortgage in repayment priority.
Seasoning: the waiting period after a purchase or refinance before you can use the line.
Frequently Asked Questions
Does unit count change how much I can borrow?
Not the leverage percentage. A duplex, triplex and fourplex share the same tiers: up to 70% CLTV on a second lien at 720 or better and up to 75% LTV on a first lien at 740 or better. Unit count affects rent coverage, vacancy exposure and the appraisal form. Subject to underwriting. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Can I borrow more than $500,000?
Only on a first lien, meaning a rental with no mortgage. Lines run to $1,000,000, but lines above $500,000 are capped at 65% LTV at a 720 score or better. Second-lien lines stop at $500,000. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
How long must I own the property first?
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). Both are subject to program guidelines.
Is the rent test run on what I draw or on the whole line?
On the whole line. The qualifying payment is a stress payment on the entire credit limit, so asking for a larger line raises the coverage you need, even if you plan to draw less later.
Can I hold the building in an LLC?
Yes, on an investment property, subject to lender program eligibility. The members sign as guarantors, and the borrowers on the line need not be the borrowers on the first mortgage.
Lendmire’s guide How to Qualify for an Investment Property HELOC on a Duplex, Triplex or Fourplex goes deeper on the documentation side.
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 mortgage broker, not a lender, and every file is underwritten individually. Tax treatment varies; consult a qualified professional.
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. CFPB – What you should know about HELOCs (booklet)
2. NerdWallet – HELOC on an 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: How Much Can You Borrow on a DSCR HELOC After a First Mortgage Modification? · How Much Can You Borrow on a DSCR HELOC on That Property? · How Much Can You Borrow on a DSCR HELOC for Investing in Mortgage Notes?
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.