The Quick Read: ADU rent counts on a DSCR cash-out when the unit is legal, the appraiser backs its rent with comparable units, and your lease and payment records all show the same number. On most files the lender counts the lower of the signed lease or the appraiser’s market-rent opinion, subject to lender guidelines. A low first mortgage raises the stakes, because the cash-out replaces it and tests your rent against a much larger new payment.
- The appraisal sets the number. Your lease tests the appraiser’s rent figure. It does not override it.
- Legal status is the gate. Rent from an unpermitted unit is usually left out of the calculation, even when a tenant really pays it.
- Your paper trail must agree. The lease, the deposits, and any rent roll should all show the same amount.
- Coverage usually binds before equity does. Cash-out on an investment property tops out around 75% LTV, but rent against the new payment often limits the loan first.
- Clearing 1.00 is not positive cash flow. DSCR compares rent to the mortgage payment only.
Key Terms Defined
DSCR (debt service coverage ratio) is the monthly rent used for lender review divided by the monthly housing payment. A result of 1.00 means rent equals the payment.
PITIA is principal, interest, taxes, insurance, and association dues. It is the payment figure in the DSCR denominator.
Market rent is the rent an appraiser opines the unit would earn on the open market. It is not what you happen to be collecting.
In-place rent is the rent a tenant pays today under a lease or an informal agreement.
Rent schedule is the appraisal exhibit that compares the subject to nearby rentals. For a one-unit property it is commonly the Form 1007.
Rent roll is a simple table listing each unit, its tenant, and its monthly rent.
Legal ADU is an accessory dwelling unit that is permitted or otherwise lawful under local zoning. This is the property-level condition that decides whether its rent can be counted.
Seasoning is the waiting period after you take title before a cash-out refinance is allowed. About 6 months from recording is the common expectation.
DSCR Cash-Out Calculator
Run the cash-out numbers in your market
Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Oct 15, 2026
Prefilled with starting assumptions — enter your property’s value, balance, taxes, and insurance for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Oct 15, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Property value, balance, taxes, and insurance are editable estimates. Maximum loan-to-value varies by lender, program, property type, and seasoning. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
Why Does a Low First Mortgage Change the Math?
A DSCR cash-out replaces your existing first mortgage. The old cheap balance gets repriced along with the new cash, so your rent must cover the full new payment on the larger balance.
That is the part many owners miss. They look at their equity and assume the cash-out is limited only by the 75% LTV ceiling on a cash-out of an investment property. On most files, rent coverage on the new payment binds first.
Here is how the two tests work together:
| Gate | What it tests | What limits it |
|---|---|---|
| Equity gate | Loan vs. as-is value | 75% LTV on a cash-out |
| Coverage gate | Rent vs. new PITIA | rent used for lender review and DSCR floor |
| Cushion gate | Cash left after payoff | About 6 months of reserves |
The loan size is the smaller of what the equity gate and the coverage gate allow. ADU rent sits in the numerator of the coverage gate, so it can decide which gate binds.
If keeping your low first loan matters more than pulling cash through a DSCR refinance, you are looking at a different product. Lendmire’s piece HELOC vs Cash-Out Refinance for an ADU With a Low First Mortgage covers that comparison. The rest of this article assumes you are replacing the first loan.
How to Document ADU Rent for a DSCR Cash-Out, Step by Step
The steps below follow the order a file moves through underwriting. Each one builds on the one before it.
Step 1: The appraisal produces two outputs. One is the as-is value, which becomes the LTV denominator. The other is a market-rent opinion, which becomes the DSCR numerator. Your documents support the second output but do not replace it.
Step 2: The lender decides where the ADU rent sits. A house with a detached ADU can be treated as a one-unit property with an ADU. In that case the rent is documented on a one-unit rent schedule, with the ADU rent shown alongside the main-house rent. If the property is legally a duplex, triplex, or fourplex, the rent analysis sits inside an income-property appraisal instead. Appraisal form names can change as the industry updates its report templates, so the exhibit your appraiser uses may carry a different label.
Step 3: The lender picks the rent figure. Across the programs we place files with, the common convention on a cash-out is the lower of the signed lease or the appraiser’s market-rent opinion. No federal rule sets that figure. It is a program convention, and the details differ between lenders.
Step 4: Actual rent is separated from rent used for lender review. A basement unit rented for years, with clean deposits every month, can still be left out if it is not a legal unit. Collected rent proves the tenant exists. It does not prove the rent is countable.
Step 5: The lender runs the ratio. Monthly rent used for program review is divided by the full monthly payment on the new loan. DSCR loans are built for non-owner-occupied investment properties, and the file qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Credit, assets, and entity papers are still part of the file.
For a one-unit investment property, Fannie Mae’s Selling Guide calls for the Form 1007 rent schedule when rental income is used to qualify. That is where the form name comes from. DSCR programs borrow the exhibit, not the agency rules around it.
Does Your ADU Clear the Gates?
Four gates decide whether ADU rent counts at all. Fail the first one and the rest rarely matter.
1. Legal status. The unit should be permitted, or lawful under local zoning. Keep permit records and the final inspection sign-off where you can find them.
2. Habitability. The appraiser should be able to confirm the unit is functional, with its own kitchen, bath, and sleeping area.
3. Comparable evidence. The appraiser needs rent comps to support the number. A thin ADU market makes this the hardest gate, because there may be few rented ADUs nearby to compare against.
4. Program fit. Some programs treat a legal non-conforming or grandfathered unit differently from a fully permitted one. Ask early.
Comparable evidence deserves a closer look. A DSCR appraisal with thin rent comparables tends to land on a more conservative rent, while one backed by several well-matched comparables gives the appraiser a firmer basis for the number.
The ADU Rent Document Package
Build the package before you apply. Lenders in our network differ on exact requirements, so treat this as the common core, not a universal checklist.
1. The executed lease for the ADU. Include every page, signed by both sides. A separate lease for the ADU beats one lease covering the whole property.
2. Proof of rent received. Bank deposits that match the lease amount are the cleanest evidence. Some programs want a few months of history.
3. Security deposit record. Show where the deposit sits and how much it is.
4. Permit and legal-status evidence. Permits, final inspection, or a zoning letter.
5. A simple rent roll. One line per unit with tenant, rent, and lease end date.
6. Insurance showing the ADU. The policy should reflect the actual structure.
Then reconcile. The lease, the deposits, and the rent roll should show the same monthly figure. When they disagree, the file stalls while the underwriter asks which number is real.
Fix this before you apply: cash rent and informal payment-app transfers weaken a file because they are hard to trace to the lease. Move the tenant to a payment method that lands in a bank account, and let a few months of deposits build before you apply. A tenant who is a relative or business associate should have a written lease at a market amount, because underwriters look harder at tenancies that are not at arm’s length.
Which Rent Counts in Each Lease Situation?
This table is a typical pattern, not a promise. The appraiser’s market-rent opinion sits behind every row.
| ADU situation | Rent likely counted | What to document |
|---|---|---|
| Fixed-term lease, at market | Lease or market rent | Lease, deposits, rent roll |
| Month-to-month | Usually market rent | Lease history, recent deposits |
| Expired lease, tenant stays | Often market rent | Renewal at market amount |
| No written lease | Market rent, if legal | Written lease before applying |
| Above-market lease | Appraisal rent caps it | Expect the lower figure |
| Below-market lease | Lease may drag ratio | Renew at market if tenant agrees |
| New or vacant unit | Market rent, if legal | Habitability, comp support |
| Tenant at non-arm’s length | Market rent, scrutinized | Written lease, bank trail |
The pattern is the same throughout. Underwriting trusts the appraiser’s market figure first and uses your documents to confirm it.
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.
Worked Example: The ADU Swing
Consider a house with a legal detached ADU and a cash-out request near the 75% ceiling on an investment property. These inputs are modeled assumptions, not market data.
- Lease-based coverage. Count both units at their lease amounts. Modeled coverage is 1.25x.
- Appraiser rent about 10% below the lease. Coverage falls to roughly 1.13x.
- Same file starting near 1.10x. A 10% rent cut lands it just under 1.00x.
- ADU rent excluded entirely. Assume the ADU supplies about a quarter of total rent. Coverage on the 1.25x file drops to roughly 0.94x.
The last line is why legal status matters so much. The same property, with the same tenant and the same payment history, moves from comfortable to below 1.00 when the ADU rent drops out of the numerator.
A small rent shortfall also shrinks the loan by more than its percentage. Taxes and insurance do not shrink when rent does, so the coverage-limited loan amount falls faster than the rent figure.
Run the numbers to payoff too. Your payoff, closing costs, and required reserves all come out before any cash reaches you. Reserves are commonly around 6 months of PITIA, and loans above $1,500,000 typically step up to about 9 months. Equity available depends on rent used for eligibility review, PITIA, reserves, and the 75% LTV ceiling, so it is not a guaranteed cash figure.
Coverage near or below 1.00 is not automatically a dead end. 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Qualification stays subject to lender guidelines, credit approval, and property review.
Where the General Rule Breaks
Five edge cases change the outcome. Know which one you are in before you order the appraisal.
Unpermitted or illegal ADU. On most files we place, the appraisal flags an unpermitted unit and leaves its rent and value out of the calculation. The loan is then sized as a single-family home on single-rent comps. Rates are not quoted here. One possible fix is to permit the unit after the fact, then apply once the legal status is on record.
Legal non-conforming or grandfathered. Some DSCR programs accept legal, legal non-conforming, and no-zoning units as allowed. Programs vary here, so ask before assuming either way.
Short-term-rental ADU. The standard rent schedule was built for long-term rent, so a strong Airbnb-style unit can look weaker on appraisal rent than it performs. Short-term-rental cash-outs run to 70% LTV, while standard rentals run to 75%. Expect a 640 or better credit score and about 12 months of hosting history, with a 1.00 coverage floor on refinances. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
ADU under construction or planned. An unfinished ADU is not credited. Sizing uses the as-is appraisal, so a DSCR cash-out will not pay you for the unit’s future rent.
Above-market and below-market leases. An above-market lease does not carry the ratio, because the appraisal figure often caps the usable income. A below-market inherited lease can pull coverage down, and renewing at market rent can fix it if the tenant agrees and the new amount is documented.
Property type matters too. Manufactured homes, log homes, and barndominiums are not offered in the network’s DSCR programs, so an ADU built as one of those is not a candidate.
What Agency ADU Rules Do and Do Not Mean for You
Search results mix agency ADU rules into DSCR discussions, and that creates confusion. Agency programs for owner-occupied loans apply lease haircuts and caps on how much ADU rent can count toward a borrower’s qualifying income. HUD‘s Mortgagee Letter 2023-17 sets out its own ADU treatment for FHA loans.
None of that governs a DSCR cash-out. DSCR files are business-purpose investor loans, reviewed on the property’s rent and the program’s guidelines. When you see a haircut or an income cap in an agency document, treat it as contrast, not as a rule for your file.
What the Decision Looks Like in Practice
Start with the gates, then the paper trail, then the size of the ask. That order saves the most time.
If the ADU is legal and the documents agree, the appraisal is mostly a confirmation step. If the ADU is not legal, decide whether to permit it first or run the file on the main-house rent alone.
If coverage comes in lower than expected, work down this ladder:
1. Take less cash. A smaller loan lowers the payment, which lifts coverage.
2. Renew a below-market lease at market rent. This works only if the tenant agrees and the new amount is documented.
3. Challenge the rent with better comps. Send them through the lender. A private rent study does not replace the appraiser’s opinion.
4. Wait and season the file. More months of deposits and a legalized unit can change the result.
A larger down payment or more equity lowers the payment and can lift coverage, but it never erases leverage caps, credit floors, reserve rules, or property eligibility. Credit matters here: a 620 floor exists in parts of the network, most programs want around 660, and 700 or better opens the strongest leverage tiers. Standard programs run up to $3,000,000, and above $2,500,000 the network generally holds to 30-year fixed structures.
If the numbers still do not work, weigh the trade. For broader program background, see the complete DSCR loans guide.
One reminder: DSCR above 1.00 is not positive cash flow. Repairs, vacancy, management, utilities, and capex sit outside the calculation. Budget for them separately.
File-Stalling Mistakes to Avoid
- Assuming the lease sets the income. The appraiser’s figure usually caps it.
- Applying with an unpermitted unit and counting its rent. Resolve legal status first.
- Mixing rent into personal accounts. Deposits that cannot be tied to the lease invite questions.
- Letting the lease and the rent roll disagree. One number, everywhere.
- Expecting credit for an unfinished ADU. Only the as-is property counts.
- Treating equity as the only limit. Coverage on the new payment often binds first.
Frequently Asked Questions
Can unpermitted ADU rent count toward a DSCR cash-out?
Usually not. On most files we place, the appraisal flags the unit and leaves its rent and value out, so the loan is sized on the main dwelling alone. Permitting the unit first is the common fix. Treatment varies by program, and qualification stays subject to lender guidelines.
Does a new ADU with no tenant history count?
It can, if the unit is legal and the appraiser supports its market rent with comparable rentals. With no tenant, the appraiser’s market-rent opinion carries the figure. The unit must be finished and habitable, because an ADU still under construction is not credited.
Will the lender use my lease or the appraiser’s rent?
On a cash-out, the common convention is the lower of the signed lease or the appraiser’s market-rent opinion. A lease above market does not raise the usable figure. A lease below market can lower it, so renewing at market rent is worth considering when the tenant agrees.
Can I keep my low first mortgage and still pull cash?
Not through a DSCR cash-out. That loan replaces the first mortgage, so the old balance is repriced with the new money.
Do agency ADU rules apply to my DSCR loan?
No. Agency ADU rules, with their lease haircuts and income caps, apply to owner-occupied agency loans. A DSCR cash-out is a business-purpose loan reviewed on property rent under each program’s own guidelines.
Next Steps
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 is a mortgage broker that arranges these loans through select lenders in its wholesale network, covering 41 markets including Washington, D.C. Call 828-256-2183 to talk through your ADU file before you order an appraisal.
For the mechanics of pulling equity out of a rental property, see Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
As a non-QM mortgage broker (NMLS# 2371349), Lendmire facilitates DSCR investor loans across 41 markets, including Washington, D.C. DSCR eligibility is generally reviewed around property-level rental income instead of personal income documentation, subject to lender guidelines, serving LLC-structured portfolios and self-employed borrowers who don’t fit conventional boxes. A two-time Scotsman Guide Top Mortgage Workplace (2025, 2026).
Get Started
Ready to find the right loan for you?
In about 30 seconds you can review financing options available for your investment property. No commitment required.
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
2. HUD
This article is part of Lendmire’s investment property cash-out refinance program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Document ADU Income for a First Airbnb DSCR Loan · How to Compare Selling a Rental With a DSCR Cash-Out Refinance · Can a First-Time Airbnb Host Use ADU Income on 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.