The Quick Read: On a DSCR loan, the rent that counts is the rent a lender can document and the property can legally earn, so long-term rent usually carries more weight on an ADU, while short-term income counts only when the use is legal and the evidence is strong. DSCR stands for debt service coverage ratio, and it compares the property’s rent to its full monthly payment. A higher gross number from nightly bookings does not automatically win.
- Long-term rent is proven by a lease or an appraiser’s market-rent opinion, and it is the easier file to document.
- Short-term income needs its own evidence, typically a hosting history or a market-income analysis, and it gets more scrutiny.
- An unpermitted or non-rentable ADU may be left out of the income entirely, so legality comes before strategy.
- Clearing 1.00 coverage measures rent against the payment only. It does not mean the property cash flows.
The Honest Answer: Who Each Option Is Really For
Long-term rent is for the investor who wants the simplest file and the most predictable number. It fits a new purchase with no operating history, an ADU in a market where nightly rentals are restricted or unproven, and an owner who does not want to run a hospitality business.
DSCR Calculator
Run the 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 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 15, 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.
Short-term rent is for the investor who has an operating ADU with a real booking record, or a property in a market with deep visitor demand and clear local permission. That investor accepts more documentation and a bigger discount on the income in exchange for a potentially stronger ratio.
Neither option wins on every file. The strongest approach is to run both numbers, then lead with the one the lender can verify.
Side-by-Side
The long-term column reflects what most programs in the wholesale network expect. The short-term column reflects the network’s short-term-rental guidelines. Details vary by lender and file.
| Factor | Long-Term Rent | Short-Term Rent |
|---|---|---|
| Review basis | Property rent vs. full payment | Property rent vs. full payment |
| Income evidence | Lease or market-rent appraisal | Hosting history or market-income report |
| History expected | Lease in place, or none | About 12 months of hosting history |
| Income treatment | Counted at documented rent | Typically discounted for variability |
| Legal gate | Permit and rentable-unit status | Same, plus local short-term rules |
| Property types | Eligible 1–4 unit; manufactured, log, barndominium not offered | Same property limits |
| Entity vesting | Individual or LLC, per program | Individual or LLC, per program |
| Reserves | Commonly about 6 months of PITIA | Commonly about 6 months of PITIA |
| Main weak point | Rent below market or lease gaps | Thin history, seasonality, local limits |
PITIA means principal, interest, taxes, insurance, and association dues, the full monthly housing obligation. Reserves are liquid funds the borrower holds after closing, and they vary by lender, leverage, and loan size. LLC vesting is available subject to lender program eligibility. Credit expectations also differ. Most long-term programs want around 660, with a 620 floor in parts of the network. Short-term files generally expect 640 or better.
What a Lender Actually Counts on an ADU
A lender counts one figure: the income that survives its review, divided by the full payment. Everything else is about how that income gets proven.
On a long-term file, the proof is a signed lease or the appraiser’s rent schedule. Form 1007 is the rent schedule for one-unit properties. Form 1025 covers two to four units and reports operating income. The appraiser also decides how to treat the ADU. Separate utility meters, a separate address, and a legal right to rent the unit all push toward counting it as its own rentable space.
On a short-term file, the proof is different. The lender looks at either an analysis of short-term market rent or the subject property’s own platform history. It then discounts that income, because bookings swing with season, pricing, and demand. That discount is often called a haircut, meaning the reduction applied to gross short-term revenue before the ratio is run. The size of the haircut depends on the lender. Operating history is generally cleaner proof than a projection, which is why a refinance of a running short-term rental reads more strongly than a purchase of a new one.
Legality sits ahead of all of it. A lender will not count rent from a space the property cannot legally rent. If the ADU lacks a permit or was built outside local rules, it can be excluded from both value and income. In that case the comparison between short and long is moot, because neither income counts.
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. Many local ADU ordinances also set minimum rental terms, which municipal research from MRSC tracks across jurisdictions. A lender may offer a short-term track on paper, but a local limit can make it unusable for your specific ADU.
When Long-Term Rent Is the Better Fit
Long-term rent is the better fit on most new purchases. A buyer has no booking history to show, and a projection is a weaker file than a market-rent opinion from the appraiser.
It also fits when the ADU is a modest, utilitarian unit in an area where nightly demand is unproven. It fits when local rules limit short stays. And it fits when the investor wants steady income without managing turnover, cleaning, and platform pricing.
Here are the situations where it tends to work best:
- You are buying and the ADU has no hosting record.
- The ADU’s permit or rentable status needs clean documentation, and a lease is the simplest proof.
- The long-term rent already covers the full payment with a margin. A file that clears 1.00 on a lease rarely needs a more aggressive income story.
- You expect to refinance later and want a stable basis to point to.
Long-term rent has its own failure mode. If the lease is below market, or the unit is vacant at the time of review, the number can come in lower than the investor expects. The appraiser’s market-rent figure then becomes the working number. It is built from comparable rentals. In practice, an ADU is often compared to similar small detached rentals with similar size, finishes, and bed and bath count.
For a closer look at the projection side, Lendmire’s piece Short-Term Projection vs Long-Term Market Rent on a DSCR Loan covers it in detail.
When Short-Term Rent Is the Better Fit
Short-term rent is the better fit when the ADU already operates as a short-term rental and the history proves it. A refinance of that property can use the actual record, which is the strongest evidence this track offers.
It also fits when long-term rent would leave the file below the coverage the investor needs. In that case, a documented short-term record may lift the ratio enough to change the leverage options. Across the network, short-term purchases reach up to 75% LTV on an investment-property purchase. Short-term refinances sit around 70%, and cash-out on short-term-rental collateral tops out at 70%. Standard long-term rentals reach 75% to 80% LTV on a purchase and 75% on a cash-out. So the short-term path can carry a lower leverage ceiling, which is a real tradeoff. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
Coverage floors work this way. Short-term purchases start at 1.00 coverage, and short-term refinances also start at 1.00. Credit expectations tend to be about 640 or higher, with roughly 12 months of hosting history.
The short-term track is a poor fit in four situations:
- The ADU is brand new with no booking record.
- Local rules restrict or ban short stays, which makes the income unusable.
- The strategy depends on a permit that may not transfer to a new owner. Lendmire’s piece short-term vs long-term rent for a DSCR buyer whose permit won’t transfer walks through that case.
- Income is highly seasonal, so a strong summer hides a weak winter.
Gross revenue also tempts investors to overstate the case. A high booking total does not make the file stronger on its own. The lender looks at how durable the income is and what survives its adjustments.
Same ADU, Both Ways
Run the numbers this way. These are modeled assumptions, not market data. Picture an ADU with the same full payment under both tracks.
On the long-term track, the appraiser’s market rent covers the payment at roughly 1.10x. The lender sees a lease or rent schedule and a clean legal status. The ratio is modest but easy to verify.
On the short-term track, assume gross booking income looks much higher on paper, which would imply something near 1.50x before any adjustment. The lender then applies its discount for variability. Assume the counted income lands near 1.25x. That ratio is stronger than the long-term version, but it only holds if the booking history is real, the local rules allow the use, and the unit is permitted.
Now change one fact. The ADU is newly built with two months of bookings. The history is too thin to support the short-term figure, so the file reverts to the long-term number at 1.10x. The investor planned on 1.25x and gets 1.10x.
That is the pattern. The short-term case can win on paper, but it breaks at the evidence stage far more easily than the lease does. On a long-term file, the weak point is usually the rent estimate. On a short-term file, the weak point is usually the proof.
If the long-term ratio falls under 1.00, there are options. 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. A larger down payment can also lift the ratio by shrinking the payment. It does not erase leverage caps, credit floors, or reserve rules.
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.
House Plus ADU: Three Combinations
Many ADU files involve a main house and a rentable unit on one property. The mix matters.
Both long-term. This is the cleanest case. Leases or a rent schedule cover both units, and the ratio reflects combined rent against the one payment.
Both short-term. The lender needs evidence for the whole property, and the same legality and history questions apply to each unit.
Split. One unit is long-term and the other is short-term. The blended ratio is only as strong as its weakest evidence. The lender will want each stream documented under its own track.
Mid-term rentals, typically furnished stays of a month or more, sit between the two. If you plan one, confirm how the lender will classify it before you buy.
You can also change strategies after closing. A switch from long-term to short-term changes the operating profile of the property. It is wise to check the loan terms and local rules first, since the original file was underwritten on a specific income basis.
Where the Agency Rules Differ
DSCR loans are business-purpose investor loans, reviewed differently from a standard owner-occupied mortgage. Agency programs follow separate logic and should not be used to read a DSCR file.
For contrast only, Freddie Mac’s ADU fact sheet requires that an ADU comply with zoning and land-use rules. HUD’s Mortgagee Letter 2023-17 ties its optional ADU rent analysis to non-transient monthly rent. Both lean toward conventional, long-term tenancy. DSCR programs are where documented short-term income is an option. The caps and tests in agency guides are borrower-qualification rules for those programs. They are not DSCR rules.
The Verdict
Long-term rent counts more often, and more easily. It is the default for purchases, new ADUs, and any property where legality or history is uncertain.
Short-term rent can count more in ratio terms, but only for an ADU that is legally rentable on a short-term basis and has a record to prove it. When it works, it works on a refinance of a running rental. When it fails, it fails on thin history or a local limit.
So the sound move is to qualify the file on the number you can prove today, and treat any short-term upside as a bonus. The same logic applies to the DSCR ratio itself. Clearing 1.00 is a payment-coverage test. Repairs, vacancy, management, utilities, and capital costs sit outside it, so a file that passes is not the same as a property that cash flows. Standard programs reach loan sizes up to $3,000,000, with reserves commonly around 6 months of PITIA and about 9 months above $1,500,000. Eligibility depends on lender guidelines, credit, and property review.
For the full framework, see Lendmire’s complete DSCR loans guide.
Frequently Asked Questions
Does ADU income count toward a DSCR loan?
It can, when the ADU is permitted and can legally be rented. The lender counts rent from a space the property is allowed to rent. An unpermitted unit may be excluded from both income and value.
Can I use projected Airbnb income on a purchase?
Some programs review a short-term market-income analysis on a purchase, but the evidence is weaker than a real booking history. Many files lean on long-term market rent instead. Short-term purchases in the network reach up to 75% LTV, subject to lender guidelines.
What if my city restricts short-term rentals on ADUs?
Then the short-term track may be unusable, even if a lender offers it. The long-term track is then the valid basis for the file.
Does a higher short-term gross always give a better DSCR?
No. The lender discounts short-term income for variability and may reduce it further if history is thin. A strong gross figure can shrink considerably before it enters the ratio.
Can I switch from long-term to short-term after I buy?
You can change how you operate the property, but the loan was underwritten on a specific income basis. Check local rules and your loan terms before you switch. A later refinance can then use the new operating history.
Talk Through Your ADU Numbers
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 financing through select lenders in its wholesale network across 41 markets, including Washington, D.C. Programs are subject to lender guidelines and underwriting, and nothing here is a commitment to lend.
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
1. MRSC: Accessory Dwelling Units
3. HUD Mortgagee Letter 2023-17
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Inherited Tenant Lease vs Appraiser Rent on a DSCR Loan · Short Sale vs Lost Rental on a DSCR Loan Past Ten Properties · How to Structure Airbnbs and Long-Term Rentals Into One 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
Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.