The Quick Read: Usually you can borrow the duplex’s value times the allowed combined loan-to-value (CLTV), minus every lien already on it, up to the program’s dollar cap, and across the wholesale network Lendmire works with that means 90% CLTV at 720+ credit if you live in one unit, but only 70% and $500,000 if you rent both. Occupancy sets the tier. Rent from the other unit does not set the loan size.
- Living in one unit makes the duplex a primary residence, so it uses the primary-residence tier.
- Renting both units moves it to the investment tier: 70% CLTV, a 700 minimum credit score, and a $500,000 line cap.
- Bank statements change how your income is proven. They never raise the equity ceiling.
- The rented unit mostly helps your debt ratio, as a discounted offset. A tenant in place does not qualify the line.
- Lines above $500,000 exist on primary residences only, at 75% CLTV or below, with a full appraisal.
Most of what follows is arithmetic you can do on a napkin. The rest is knowing which tier you are standing in.
How large a line the equity supports.
An equity line is sized by combined loan-to-value, occupancy, and credit — not by rental coverage. Switch the occupancy or the credit band and the ceiling moves with it.
Investment-property lines require a 700 minimum credit score; second-home lines start at a 640 minimum and primary-residence lines at 600, and the combined-LTV ceiling steps down as the credit band drops on primary-residence and second-home lines and holds on investment-property lines; the line cap steps down on primary-residence lines and holds at every tier on investment-property and second-home lines.
A debt-to-income ratio above 45% requires 680+ credit. Profiles under 640 are limited to single-family homes. At least 75% of the approved line is drawn at closing. Ceilings, floors, and caps update from Lendmire’s centralized guideline source.
Line estimate
Illustrative estimate only — not a quote, Loan Estimate, approval, or commitment to lend. The rate is an editable assumption; equity-line pricing is variable through both the draw and repayment periods and never converts to fixed. Occupancy and credit drive the ceiling together: an investment property tops out at 70% combined LTV (minimum credit 700, line cap $500,000); a second home tops out at 90% combined LTV (minimum credit 640, line cap $500,000), with the ceiling stepping down as the credit band drops (the cap holds at every tier); a primary residence tops out at 90% combined LTV (minimum credit 600), and its $750,000 maximum line is available only at 75% combined LTV or below with a 700-or-better credit profile (720 on the longer-runway program) and a full appraisal. Lines above $500,000 require a full appraisal. Credit, debt-to-income, property type, and full underwriting review all affect the final line.
Key Terms Defined
Combined loan-to-value (CLTV): all loans secured by the property, added together, divided by the property’s value.
Lien: a lender’s legal claim on the property. Your first mortgage is one. A new line adds another.
Bank statement income: income proven by 12 to 24 months of deposits in personal or business accounts instead of tax returns or pay stubs.
Owner-occupied: you live in the property as your home. A duplex where you live in one unit qualifies.
Debt-to-income ratio (DTI): your monthly debt payments divided by your monthly income.
Draw period: the stretch when you can borrow from the line and pay interest only, before repayment of principal begins.
How Does the Lender Classify a Duplex You Live In?
A duplex where you live in one unit is a primary residence. That classification matters more than anything else on the file, because it decides which leverage tier you get.
Across the programs we place files with, the tiers are tied to occupancy. An owner-occupied duplex gets the primary-residence table. A duplex with tenants in both units gets the investment table. Same building, same equity, very different ceilings.
Many borrowers assume every duplex is an investment property. It isn’t, as long as you actually live there. That is also why you should never describe your occupancy loosely on an application. If you plan to move out soon, say so and let the lender sort the tier out.
The tiers look like this:
| Occupancy | Max CLTV | Credit | Line cap |
|---|---|---|---|
| You live in one unit | Up to 90% (only at 720+) | 600 program floor | $750,000 |
| Both units rented | 70% | 700 minimum | $500,000 |
The 90% figure exists only at a 720 or better credit profile. Lower scores sit at lower ceilings, and your exact tier depends on the lender and the file. The investment tier is flat: 720 and 700 both reach 70%, so credit above 700 buys eligibility, not extra leverage.
The Formula: Four Steps
Take the property’s value. Multiply by the allowed CLTV. Subtract every lien already on the duplex. Then check the result against the dollar cap.
That is the whole calculation. Equity is the home’s value minus what you owe. The CLTV ceiling says how much of that equity the lender will let you borrow against, and the cap trims the result if it runs too high.
Here are three cases, with everything expressed as a share of the property’s value. These are modeled assumptions, not market data.
Case 1: first mortgage at 45% of value, you live in one unit, 720+ credit. The 90% ceiling minus 45% leaves room for a line of roughly 45% of value, before the dollar cap.
Case 2: same first mortgage, both units rented. The 70% ceiling minus 45% leaves roughly 25% of value. Same building, about half the line.
Case 3: first mortgage at 75% of value. On a primary residence at 720+, you have about 15% of value of room. On the investment tier, there is none, because you already sit above the 70% ceiling.
The wholesale lenders we work with are not outliers on the basic formula. What differs is the ceiling. Market surveys report that most lenders cap total borrowing near 85% of home value, per CBS News, and that is a market-wide figure, not a network one. On this network the ceilings are the occupancy-tiered ones above: 90% on a primary residence at 720+, and 70% on an investment property.
What Limits You First?
Four things can cap your line. Whichever one binds first sets the number, and on a duplex it is usually equity or the dollar cap.
| Limit | Primary residence | Investment |
|---|---|---|
| Equity (CLTV) | Up to 90% at 720+ | 70% |
| Dollar cap | $750,000 | $500,000 |
| DTI | 50% max | 50% max |
| Credit | 600 floor | 700 floor |
Equity is the usual limiter. If your first mortgage already eats most of your value, nothing else matters. The consumer-finance sizing logic in the CFPB’s HELOC booklet is the same: take a percentage of appraised value, then subtract what you owe.
The dollar cap matters on higher-value duplexes. Lines run from $25,000 to $750,000 on a primary residence, but anything above $500,000 requires a 700 or better credit profile (720 on the longer-runway structure, described below), a CLTV of 75% or lower, and a full appraisal. Investment lines stop at $500,000.
DTI is tested on the interest-only payment calculated at the maximum draw. That surprises people. You might draw half the line, but the lender qualifies you as if you drew all of it. The maximum is 50%. It is 45% for credit profiles from 600 to 679, and any ratio above 45% requires a 680 minimum.
Credit is a floor and a tier. Lenders in the network use a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing.
How Does the Rent Count? (And How Much?)
The rent from the other unit helps your debt ratio, but it does not raise your line. A HELOC lender tests you, meaning your credit, your DTI and your CLTV. It does not test the building’s rent coverage the way a DSCR lender would.
Lenders typically credit a discounted share of the rent, and the share is set by the lender. It is not the full lease amount. Some want leases or documented rental history before they count anything. A new tenant who signed last week usually helps less than a tenant with a track record.
So if you are hoping the rent from the second unit will unlock more borrowing, set that expectation down now. The rent can move you from borderline DTI to comfortable DTI. It cannot move you from 70% CLTV to 90%.
Bank statements work the same way. They are about proof of income, not size of line. Self-employed borrowers commonly give 12 to 24 months of personal or business statements. The lender strips out transfers, refunds, loan proceeds and one-time deposits, then averages what is left. Business accounts get an expense factor applied. Personal accounts are usually read closer to raw deposits.
Business bank accounts need a 680 minimum for the deposit analysis. On the investment tier that never binds, because the investment floor is already 700. Qualification runs on documented income under the applicable program, subject to lender guidelines. It is alternative documentation, not less documentation.
For the qualification side of this file, see Lendmire’s piece How to Qualify for a Bank Statement HELOC on a Duplex When You Rent the Other Unit.
What Happens If You Move Out or Rent Both Units?
You fall into the investment tier, and your ceiling drops to 70% CLTV and $500,000. Occupancy is the fork in the road.
The honest way to handle this is to pick the tier that matches your plans. A line opened as a primary residence assumes you live there. If you are about to move out and rent both units, the investment table is the one that applies to your situation. Misstating occupancy creates problems you do not want, and the extra leverage is not worth them.
An investment line also has structural limits:
- Title must be in your name or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title.
- Eligible property is 2 to 4 units, single-family, PUD, townhome or condo, including non-warrantable condos.
- Because an investment line caps at $500,000, it normally runs on an automated valuation instead of a traditional appraisal. You can still request a full appraisal.
How the Line Itself Is Built
A bank statement HELOC here is a standalone line in first or second lien position. If it sits in second position, your existing first mortgage stays untouched, along with its terms. That is the main appeal for anyone holding a low-payment first loan.
There are two draw structures on primary residences and second homes. One is a 3-year interest-only draw followed by a 17-year repayment. The longer-runway structure is a 5-year draw followed by a 25-year repayment. Investment lines use the longer-runway structure only. Pricing on both is variable and never converts to fixed.
At least 75% of the line is drawn at closing. So you are not holding a large unused credit line for emergencies. You are carrying a significant balance from day one, with a variable cost, and the payment steps up when repayment begins.
Some non-QM second liens are closed-end lump sums rather than revolving lines. Ask which one you are being offered.
Bank Statement HELOC, Investment Line, or DSCR Cash-Out?
The right tool depends on occupancy, title and how rent-driven the property is. Here is how the three compare.
| Factor | HELOC, you live there | HELOC, fully rented | DSCR cash-out |
|---|---|---|---|
| Reviewed on | Your credit, DTI | Your credit, DTI | Property rent vs payment |
| Max leverage | 90% CLTV at 720+ | 70% CLTV | About 75% LTV |
| Occupancy | Owner-occupied | Non-owner | Non-owner only |
| Title | You or revocable trust | You or revocable trust | LLC possible |
DSCR stands for debt service coverage ratio. It compares monthly rent to the full monthly payment on the property (principal, interest, taxes, insurance and any HOA dues), and the lender asks whether rent covers it. A cash-out refinance on a standard rental tops out around 75% LTV across most of the network, with about 6 months of seasoning as the common expectation. Short-term-rental collateral is more restrictive, with cash-out at 70%. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
DSCR loans are for non-owner-occupied properties, so if you live in one unit, that route is closed until you move out. Once the building is fully rented, or if it sits in an LLC (subject to lender program eligibility), a DSCR cash-out becomes the more natural fit. Many programs start at 1.00 coverage. A separate select-lender path goes below 1.00, with leverage and terms adjusted.
Clearing 1.00 does not mean positive cash flow. Repairs, vacancy, management and utilities sit outside the calculation. NerdWallet notes that not all lenders offer a HELOC on an investment property and that requirements are strict, and it names a DSCR second mortgage as a possible fit for a property that is primarily rented. The complete DSCR loans guide covers how that product works end to end.
Who Should Skip This Line
This product is a poor fit in several situations. It is better to learn that before you pay for an appraisal.
- Your duplex is deeded to an LLC. The line requires title in your name or a revocable trust. A vesting change or a DSCR cash-out is the alternative.
- Your first mortgage is already high. If it sits at or above the tier ceiling, there is no room to borrow.
- You own more than 15 financed properties. That borrower is not eligible.
- You already hold three lines. Borrowers are limited to three, with combined exposure caps ($2,000,000 on the higher-leverage program and $750,000 on the longer-runway program).
- The property type is excluded. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural zoning are not eligible.
- Your existing loan restricts renting. Read your current mortgage and any line you already hold.
Borrowers with derogatory credit face seasoning rules. A bankruptcy needs 4 years from discharge or dismissal. Foreclosure-family history depends on the program, and one declines it entirely.
A few states add their own caps. A Texas primary residence, for example, is a homestead and tops out at 80% CLTV. The product is also offered only in Lendmire’s 16 full-service states, which is narrower than the DSCR footprint. Ask for the list before you assume your state is covered.
Steps and Documents Checklist
1. Pick the occupancy tier. Live in one unit, or rent both.
2. Check title. Personal name or revocable living trust.
3. Pull your first mortgage balance. You need it for the CLTV subtraction.
4. Gather 12 to 24 months of statements. Personal or business, whichever holds your deposits.
5. Collect leases or rental history for the other unit.
6. List your debts. The first mortgage payment counts in DTI, and the new line’s maximum-draw payment will too.
7. Order valuation. Automated valuation is normal at or under $500,000. A full appraisal is required above that.
8. Review the structure. First or second lien, draw period, and whether the line is revolving.
A broker that places files with several wholesale lenders will match your scenario to the program that fits. The best program for your situation depends on property type, credit profile, leverage need and documentation. Lendmire arranges these loans. It does not lend, and every figure here is subject to lender guidelines and full file review.
Frequently Asked Questions
Can I use the other unit’s rent to qualify for a larger line?
Not directly. Rent from the other unit is typically credited at a discount and helps your debt ratio. It does not lift the CLTV ceiling or the dollar cap. A lease helps most when you can document it, but a tenant in place alone does not qualify the line.
Does a bank statement HELOC on a duplex use the investment tier if I live in one unit?
No. A duplex where you live in one unit is a primary residence, so it uses the owner-occupied tier. That reaches 90% CLTV at 720+ credit. If you move out and rent both units, the investment tier applies: 70% CLTV, 700 minimum credit and a $500,000 cap.
What is the maximum line amount?
Lines run from $25,000 to $750,000 on a primary residence. Anything above $500,000 requires a 700 or better credit profile (720 on the longer-runway structure), 75% CLTV or lower and a full appraisal. Investment lines stop at $500,000. Equity usually binds first.
Can an LLC own the duplex and still get this line?
No. Title must be held by you individually or by a revocable living trust. LLCs, corporations, partnerships and irrevocable, blind or land trusts cannot hold title. A property already in an LLC needs a vesting change, or a DSCR cash-out refinance, which can work with LLC-titled rentals subject to program terms.
How does DTI work on a line I have not fully drawn?
The lender reviews your file on the interest-only payment calculated at the maximum draw, not your actual balance. The limit is 50%. It is 45% for credit profiles from 600 to 679, and a ratio above 45% requires a 680 minimum.
If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage, and your goals. Reach the team at 828-256-2183 or request a quote.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and real estate investors in its 16 full-service states. Home equity lines of credit are arranged through wholesale lending channels; Lendmire brokers the line and the lender underwrites each application under its occupancy-based 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. CBS News – How much equity can you borrow with a HELOC
2. CFPB – What you should know about HELOCs booklet
3. NerdWallet – HELOC on investment property
This article is part of Lendmire’s bank statement HELOC program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can You Get a Bank Statement HELOC on a Fourplex With Five Financed Rentals? · Can You Get a Bank Statement HELOC Without Changing the Deed? · Can You Get a Bank Statement HELOC Without Their Spouse on the Loan?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.