The Quick Read: A DSCR loan on a duplex is sized by the lowest of three limits: the leverage cap, the loan the rent can carry, and the program’s dollar band. Rent decides the loan only when it is the tightest limit. On a strong-rent duplex, leverage usually sets the number instead.
- Leverage is usually 75%–80% LTV on a purchase, subject to lender guidelines.
- Both units’ rent is added together and tested against one building payment.
- Weak rent shrinks the loan, even when you have equity.
- Clearing 1.00 coverage is not the same as positive cash flow.
- Taxes and insurance shrink loan capacity as much as rent does.
Most investors ask the wrong question first. They ask what the lender will lend, when the better question is which of three limits will bind. This guide walks through each step, and the edge cases where the rule bends.
DSCR Calculator
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Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Oct 29, 2026
Prefilled with starting assumptions — enter your own rent or nightly figures, taxes, insurance, and HOA for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Oct 29, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Rent, nightly rate, occupancy, taxes, and insurance are editable estimates. Short-term rental figures are estimates only and vary significantly by season, property type, management approach, and local short-term-rental rules — confirm local regulations before relying on them. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
What Does “Based on Rent” Actually Mean?
Rent sizes a duplex DSCR loan by setting the largest monthly payment the property can carry. The lender divides the rent used for lender review by the coverage target. What remains after taxes and insurance is the room left for principal and interest, and that room caps the loan.
A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Your personal paycheck is not the main test. The property is.
DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage.
Key Terms Defined
- DSCR (debt service coverage ratio): Monthly rent divided by the full monthly housing payment on the property.
- PITIA: Principal, interest, taxes, insurance, and any HOA dues. It is the payment the rent has to cover.
- LTV (loan-to-value): The loan balance as a percentage of the property’s value.
- Rent used for lender review: The rent figure the lender actually uses, which may differ from what you collect.
- Form 1025: The appraisal report for two- to four-unit properties, which includes a rent analysis for each unit.
- Seasoning: The waiting period a lender wants between buying a property and refinancing it.
Is It Gross Rent or Net Operating Income?
On a duplex, the ratio uses gross rent used for lender review divided by PITIA. It does not use net operating income. BiggerPockets is a common place to see this confusion, because commercial multifamily lenders do work from net operating income divided by debt service.
Small-balance duplex DSCR files use the simpler version. You do not subtract vacancy, management, or repairs from the rent first. That keeps the test clean, and it also keeps it incomplete, which matters later in this guide.
How Does the Lender Size the Loan?
Three Limits, Lowest Wins
The loan is the smallest of three numbers. Most investors only think about the first.
1. Leverage cap. On a purchase, most files land at 75%–80% LTV, which means 20%–25% down. Select high-leverage programs reach 85% LTV with roughly a 700+ score. The cap applies to the lower of the price or the appraised value.
2. Rent-supported amount. The rent, the coverage target, and the taxes and insurance produce a maximum payment, which implies a maximum loan.
3. Program dollar band. Standard programs run up to $3,000,000. Above $2,500,000 the network generally holds to 30-year fixed structures. A duplex rarely hits this ceiling, but the band exists.
Here is how the limits trade places.
| Duplex situation | Limit that usually binds | What it means |
|---|---|---|
| Strong rent, modest taxes | Leverage (LTV) | Rent has room to spare |
| Strong rent, heavy taxes and insurance | Rent coverage | Carrying costs eat the cushion |
| Weak or below-market rent | Rent coverage | Loan shrinks or down payment grows |
| Very large balance | Program band | Rare on a duplex |
Run the numbers on a duplex where rent comfortably clears the target. The lender stops at the LTV cap, and the extra rent does nothing for loan size. It may still help your pricing.
Which Rent Counts on a Duplex?
Across the network, most programs use the lower of the in-place lease rent or the appraiser’s market rent, added up across both units. The exact treatment varies by lender.
The appraiser reports market rent for each unit. Fannie Mae’s Selling Guide describes Form 1025 as the form for traditional appraisals of two- to four-unit properties, and it names Form 1007 as the one-unit counterpart. Those are agency form names. DSCR loans are not agency products, but the same forms are widely used to document rent. The appraisal form list shows both titles.
One appraiser’s blog explains that Form 1025 captures rent unit by unit and rolls the figures into an operating income statement. That gives the lender a per-unit rent opinion to compare against your leases.
What this means in practice:
- Above-market lease: It does not raise the rent used for program review. The lower figure governs.
- Below-market lease: It can hold the rent used for eligibility review down until the leases reset.
- Vacant unit: Treatment depends on the program. Some lenders count market rent, others want a lease. Ask before you write an offer.
- One building, one test: A duplex is a single rental. Both units’ rent sits over one payment. Rent from your other properties is not pooled in.
Step by Step: From Monthly Rent to Maximum Loan
Here is the method, using ratios instead of dollars.
1. Add the rent used for the lender’s review for both units.
2. Divide by the coverage target. At a 1.00 target, the maximum payment equals the rent. At a higher target, such as 1.20, the maximum payment is the rent divided by 1.20, so it is smaller.
3. Subtract taxes, insurance, and any HOA dues. What remains is the room for principal and interest.
4. Convert that room into a loan balance. The calculator does this conversion for you as an illustrative estimate.
5. Compare it with the LTV-based amount. The lower one governs.
Say you are eyeing a duplex at a modest price, and rent covers the payment at about 1.2x with a 25% down payment. Leverage probably sets the loan, because rent has cushion. Now picture an identical duplex in a high-tax county. Same rent, but coverage falls toward 1.0x. Here rent may bind, and the loan could come in under the LTV cap. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Coverage of 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Stronger ratios generally open better pricing and leverage.
Why Taxes and Insurance Change the Loan
Two duplexes with identical rent can support very different loans. The difference lives in the denominator. Taxes and insurance are fixed claims on the rent before any principal and interest is counted.
A high-tax, high-insurance building leaves less room for the loan itself. A low-carry building leaves more. Budget for these costs by county and ask for a real insurance quote before you commit to a price, because that single number can move the file more than a small rent change.
What Changes the Number
Several levers move the loan size.
- Down payment. A larger down payment lowers the payment and can lift the DSCR. It never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.
- Credit tier. A 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest leverage tiers.
- Interest-only structure. Qualifying on an interest-only payment lets the same rent support a larger loan. Interest-only periods and 40-year terms are available through select lenders in the network. ARM structures exist too.
- Loan size band. Larger balances can carry heavier reserve requirements.
- Reserves. Reserves vary by lender, leverage, loan size, and transaction type. About 6 months of PITIA is common, and loans above $1,500,000 typically step up to about 9 months.
One Side Vacant or Under-Rented
Rent loss hits the loan twice. Coverage drops, and the maximum supportable payment drops with it.
Picture a duplex where both units rent at market. It clears 1.2x. Now one side sits vacant at closing, and the lender will not count rent for it. Coverage can fall below 1.00 on half the rent. At that point you have three options: a larger down payment, a lower price, or a select-lender sub-1.00 path with adjusted leverage and terms.
The cleanest fix is to lease the vacant unit before you apply. A signed lease at market rent restores the full rent figure.
DSCR vs. conventional financing
There are two common ways to finance an investment property, and they qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
Purchase vs. Cash-Out Sizing
The leverage cap is tighter on a cash-out refinance, so the LTV limit binds sooner.
| Factor | Purchase | Cash-out refinance |
|---|---|---|
| Typical LTV ceiling | 75%–80% | About 75% |
| Value used | Lower of price or appraisal | Appraised value |
| Seasoning | Not applicable | About 6 months is common |
| Rent test | Same | Same |
A low appraisal on a purchase leaves the gap on you, because LTV applies to the lower of price or value. An appraisal above the price does not let you borrow more. Read about the other side of this in Lendmire’s piece How Much Rent a Duplex Needs to Cover Its DSCR Loan Payment.
Ratio Is Not Cash Flow
Clearing 1.00 does not mean the duplex makes money. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital expenses all sit outside the calculation.
A duplex can clear 1.1x and still lose money in a bad year. Run your own budget separately. The lender’s test answers one question: can the rent carry the payment. It does not answer whether the investment is good.
If the Rent Doesn’t Carry the Loan You Want
Work through these levers in order.
1. Put more down, which shrinks the loan and the payment.
2. Negotiate the price down.
3. Lease any vacant unit at market rent.
4. Ask about an interest-only structure through select lenders.
5. Raise rents at lease renewal and reapply.
6. Explore a select-lender path with coverage below 1.00, where leverage and terms adjust.
7. Look at a no-ratio structure, which is available only through select lenders, generally for borrowers who already own a primary residence.
Lendmire’s article How Much Down Payment, Rent and Reserves Move a Duplex DSCR goes deeper on the trade-offs. The complete DSCR loans guide covers the full program picture.
Duplex vs. Triplex vs. Fourplex
The method is identical for two- to four-unit properties. All unit rents sum over one payment, and Form 1025 covers all three. Five or more units are generally commercial-style loans and follow a different path.
Eligibility Edge Cases
- Owner-occupied duplex: DSCR is for investment property. If you live in a unit, you are outside the program.
- First-time investors: Many first-timers do qualify, subject to lender guidelines, credit approval, and property review.
- Property types: Manufactured homes, log homes, and barndominiums are not offered in the network.
- Reported ratios vs. the network: Market surveys report that many lenders prefer 1.25 or higher. On the network, 1.00 is where select programs start, and stronger ratios open better terms.
Frequently Asked Questions
Does a bigger down payment always raise my loan?
No. A bigger down payment lowers the loan you need and can lift the coverage ratio. It does not lift the leverage cap, and it does not waive credit or reserve rules.
Which appraisal form is used on a duplex?
Form 1025, the small residential income property report. It includes a rent opinion for each unit. Form 1007 is the one-unit version.
Is there a government loan cap on a DSCR duplex loan?
No. Conforming loan limits cover agency loans only. A DSCR loan is sized by leverage, rent coverage, and the program’s dollar band.
Does a DSCR dip after closing cause a default?
The ratio is tested when the loan is underwritten, not monitored monthly. Your loan terms still require on-time payments.
Can I get a loan if the rent falls below the payment?
It depends. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. Qualification is subject to lender guidelines, credit approval, and property review.
Tax treatment varies; consult a qualified professional.
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage, and investor goals. Lendmire arranges DSCR financing through select lenders in its wholesale network across 41 markets, including Washington, D.C.
About Lendmire
Lendmire — NMLS# 2371349 — is a DSCR and non-QM mortgage brokerage with investor loan programs in 41 markets, including Washington, D.C. DSCR eligibility is commonly reviewed by the lender around property-level rent rather than personal income documentation, subject to lender guidelines, and the brokerage helps arrange financing for LLC-owned portfolios beyond conventional financed-property limits. Recognized by Scotsman Guide as a Top Mortgage Workplace in 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. Fannie Mae Selling Guide B4-1.2-01
2. Fannie Mae: Selling Servicing Guide Forms
3. Appraiser blog on Form 1025
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does a DSCR Loan Need a 1007 Rent Schedule? · Can a W-2 Employee Get a DSCR Loan on a Rental? · Can You Open an LLC Before Closing a DSCR Loan?
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.