The Quick Read: It depends on the property’s value and the first mortgage balance, because on a second lien the first mortgage balance plus the full new line can reach up to 70% combined loan-to-value at a 720 credit score or better, on lines up to $500,000, subject to underwriting. The first mortgage’s balance sets that limit, not its pricing. The rent must also cover a stress payment on the whole line, which is a second test the equity math does not capture. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
- The cap is combined loan-to-value (CLTV): first balance plus the full line, divided by value.
- Lines run from $50,000 to $500,000 on a second lien.
- The first mortgage’s documents must allow a junior lien.
How the Limit Gets Set
The limit comes from one subtraction. Take 70% of the property’s value, then subtract what you still owe on the first mortgage. What remains is the most the new line can be.
A DSCR HELOC is a revolving line of credit on a rental you keep. It is written as a standalone second lien behind the first mortgage you keep. It is reviewed on the rental’s income: no traditional personal-income documentation, W-2s or personal income calculation, subject to lender guidelines. Lendmire arranges this product through a wholesale lender in its network. It is offered in 15 of Lendmire’s 16 licensed states, every licensed state except Tennessee.
CLTV counts the full line limit, not just the amount drawn. Ask for a $200,000 line and the full $200,000 sits in the formula on day one.
The table below shows how first-mortgage balance, as a share of value, shrinks the room. These are illustrative percentages of value, and the lender’s own calculation governs.
| First balance (% of value) | Room under 70% CLTV (% of value) | Read |
|---|---|---|
| 30% | 40% | Wide room |
| 40% | 30% | Solid room |
| 50% | 20% | Moderate room |
| 60% | 10% | Thin; check the $50,000 minimum |
| 65% | 5% | Usually too small to fit a line |
| 70% or more | None | No second lien fits |
The $50,000 minimum line matters at the bottom of the table. Room of 5% or 10% of value only works if the property is worth enough that the room reaches $50,000. On a modest rental, a 60% first balance often leaves no usable line.
Value drives everything. A lower valuation shrinks the line, and a declining-market flag on the property lowers the ceiling by 5 points. Philadelphia lines carry a ceiling 10 points lower.
A sub-4% first mortgage helps in one way only. Its payment is small, so the property’s cash flow stays strong. That matters for the second test.
Does the Rent Test Shrink the Line Further?
Yes, it can. The program’s minimum coverage ratio is 1.10x, subject to underwriting. Gross monthly rent is divided by a qualifying payment. That payment is a fully amortizing payment on the entire credit limit at a stress rate set above the start rate. The stress payment covers principal and interest only, not taxes or insurance.
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 can have at most one vacant unit.
Because the stress payment covers the full limit, a bigger line can fail coverage even if the equity is there. Equity may allow $400,000 while rent supports a smaller line. In that case rent sets the size.
A first-lien payment is typically counted in the lender’s own DSCR formula alongside the new line’s payment, but each lender sets how the two are combined, so the program guidelines control. A low-cost first mortgage tends to help the overall cash-flow picture, but the lender’s calculation decides the ratio.
Key Terms Defined
CLTV: Combined loan-to-value, meaning every loan secured by the property added together and divided by its value.
Second lien: A loan recorded behind the first mortgage, so the first lender is paid first if the property is sold or foreclosed.
DSCR: Debt service coverage ratio, meaning the property’s gross monthly rent divided by the qualifying payment.
Stress payment: A payment calculated on the full credit limit at a rate above the start rate, used only to test whether rent covers the line.
Draw period: The stretch when you can borrow from the line and pay interest only on what you have drawn. This program’s draw period is 5 years.
Keep the First Mortgage or Refinance It?
Keep the first when the new money fits under the CLTV ceiling and the first mortgage’s terms are far better than a new loan’s. Replace it when the cash need is large or the balance already sits near the cap.
The comparison is a blended-cost question. Multiply each balance by its own rate and add the results. Divide by the total debt. That gives the blended cost of keeping the first and adding the line. Compare it with the cost of a new cash-out loan on the whole balance. When the first balance is large and cheap, the blended number usually stays lower, because the higher cost applies only to the smaller new piece. Both sides of that comparison come with the lender’s disclosures.
| Situation | Usually fits |
|---|---|
| First balance under 50% of value, modest cash need | Keep the first, add the line |
| First balance near 65% of value | Cash-out refinance of the whole loan |
| Score of 700 to 719 with a first mortgage | No second-lien cell; consider other structures |
| Large cash need above the line cap | Cash-out refinance |
| One-time capital need | A fixed-rate closed-end second may suit better |
This is a real trade-off. A refinance replaces the existing first mortgage on the entire balance, while the line leaves it in place but adds a second payment that can vary.
Lock-in is why these questions are common. Per HousingWire’s coverage of ICE data, about two-thirds of first-quarter second liens went to borrowers who locked in their first mortgages in the low-rate years.
What Else Goes Into the File?
The valuation depends on line size. Lines to $400,000 use an automated valuation (confidence score of 85 or better) with a property inspection report, or a full interior appraisal. Larger lines take a full interior appraisal on Form 1004, 1073 or 1025. Appraisal waivers are not accepted. Rent comes from the Form 1007 market rent schedule.
Title is a full title policy on second liens above $400,000. Smaller second liens use an owner-and-encumbrance report.
Seasoning is one rule with two measurements. 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).
Credit history matters too. The file needs no 30-day mortgage late in the last 12 months. It needs 48 months since a bankruptcy, foreclosure, short sale or deed-in-lieu. No reserves and no cash to close are required. A borrower can have at most 5 loans or $2,500,000 with the program.
Some properties are outside this program. These include rural-designated property, condotels, row homes and leaseholds. Commercial, agricultural and mixed-use properties are also out, along with land trusts, age-restricted communities and a property listed for sale in the prior 2 months. Single-family, PUD, townhome, two-to-four-unit and condominium properties are eligible property types, subject to underwriting.
An LLC can stay on title, subject to program terms. The members sign as guarantors. A title holder who is not a borrower signs a non-borrowing owner acknowledgment and the security instrument.
Eligible borrowers are US citizens, permanent residents and non-permanent residents with a Social Security number. Foreign nationals and ITIN borrowers are not eligible.
The First Mortgage’s Own Documents
Check the first mortgage’s security instrument for a junior-lien clause before anything else. The first mortgage must allow a second lien behind it. This matters most when the first loan is itself a DSCR loan. Pull the note and the recorded instrument and read the due-on-sale and subordinate-financing language.
Lien position follows recording order. A line written behind a kept mortgage is always a second lien, and a second lien needs a 720 score; no second-lien tier exists below that. A first-lien line exists only on a rental with no mortgage. That path takes up to 75% LTV at a 740 score or better, or 70% LTV at 700 to 739, on lines up to $500,000. Lines above $500,000, up to $1,000,000, carry a 65% LTV ceiling at 720 or better. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
Where the Money Gets Risky
The rate on the line is variable. Per the CFPB’s explanation of home equity lines, payments can jump when the draw period ends and repayment begins. On this program the draw period is 5 years of interest-only payments on the drawn balance. Then a 25-year fully amortizing repayment period follows, with a 30-year maturity. Payment shock arrives at that handoff.
The FTC notes that you pay interest only on what you borrow, and that interest-only payments may be allowed during the draw period. This program draws at least 80% of the line at closing. The closing draw is never less than $50,000, so on the smallest lines the whole line is drawn at closing. Later draws are at least $5,000 each. Size the line to the real need, not to the ceiling.
Stress-test cash flow with a higher variable payment and a vacant unit. Plan the exit before closing, whether that is a sale, a refinance, or paydown from rents before repayment starts.
Skip this product in these cases:
- The first balance is already near 70% CLTV.
- The score is 700 to 719 and a first mortgage stays in place.
- The property is rural, a condotel, a row home or a leasehold.
- The rental was bought or refinanced in the last 6 months.
A BiggerPockets thread shows investors running into these hurdles when they try to pull a line of credit from a rental. A bank version looks at personal income and debt-to-income. The DSCR version looks at the property’s rent. Another BiggerPockets thread suggests asking for a line of credit secured by investment property, since some lenders balk at the word HELOC for a non-owner-occupied home.
A primary-home HELOC is a different, owner-occupied product. It puts your own home at risk. This line is never offered on an owner-occupied home. For a side-by-side of requirements, see Lendmire’s overview of investment property HELOC requirements behind a sub-4% first mortgage. The complete DSCR loans guide covers the wider program family.
Before You Apply
1. Confirm the first mortgage allows a junior lien. 2. Get the current first-mortgage statement and balance. 3. Estimate value and compute first balance as a percentage of value. 4. Confirm the rental has a lease in place and, on a two-to-four-unit, no more than one vacant unit. 5. Check the score: 720 or better for a second lien. 6. Gather entity documents if an LLC holds title, and hazard insurance covering both liens. 7. Confirm both six-month seasoning clocks have run. 8. Confirm the property type is eligible.
Frequently Asked Questions
Does the first mortgage’s rate change how much I can borrow?
No. Only the balance counts against combined loan-to-value. The first mortgage’s terms may help your cash flow and your overall cost, but they do not enlarge or shrink the line.
What if my score is 700 to 719 and I want to keep my first mortgage?
No second-lien tier exists below 720, so this program does not fit. A first-lien line is available at 700 or better only on a rental with no mortgage. Other structures, such as a cash-out refinance of the whole loan, are worth comparing.
How long must I own the rental before opening a 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). Both must be met, subject to underwriting.
Can I draw only a little and leave the rest of the line unused?
Not on this program. At least 80% of the line is drawn at closing, and later draws are at least $5,000. CLTV and the rent test both count the full limit.
Is a DSCR HELOC the same as a cash-out refinance?
No. A refinance replaces the first mortgage. The line sits behind it and leaves it untouched. Compare the two with the blended-cost method above.
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 lender guidelines and is not a commitment to lend.
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. HousingWire – ICE home equity lending and the lock-in effect
2. CFPB’s explanation of home equity lines
3. FTC – Home Equity Loans and Home Equity Lines of Credit
4. BiggerPockets – HELOC on investment property? Can it be done
5. BiggerPockets – Heloc for 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: Can You Get a DSCR HELOC for Borrowing Behind the First Mortgage You Already Have? · Can You Get a DSCR HELOC When the First Mortgage Is in Your Spouse’s Name? · How Much Can You Borrow on a DSCR HELOC on a Rental That Still Has a First Mortgage?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Important disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage brokerage. Lendmire is not a direct lender, depository institution, or financial advisor. All loan inquiries are subject to lender underwriting; this article does not constitute a commitment to lend. Rates, terms, and program guidelines are subject to change without notice and vary by borrower profile, property type, and state. Information in this article is general in nature and is not financial, legal, or tax advice. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.