How To Qualify A Short-term Rental When The Lease Is Below Market — The Quick Read: When a tenant’s lease sits below the appraiser’s market-rent opinion, most rental-income underwriting caps qualifying income at the lower figure — not the higher one. Investors who want to use short-term rental income instead don’t fix the lease problem; they switch to an entirely separate underwriting track, one that runs on operating history or an appraisal-based short-term rent analysis instead of the lease at all. Here’s how each path actually works, and where investors get it wrong.
The Setup: Why a Below-Market Lease Becomes a Problem
Picture an investor under contract on a duplex. The current tenant has been there four years, paying a rent that was fair when signed but hasn’t moved since. The appraiser’s rent schedule comes back well above it. The investor assumes the higher number should count. It doesn’t.
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Rental-income underwriting on occupied property compares two numbers: the actual signed lease and the appraiser’s market-rent conclusion. Appraisers produce this on Form 1007 for single-family rentals or Form 1025 for 2-4 unit buildings. Most programs qualify off whichever number is lower. This is a deliberate, conservative rule. It stops an inflated or temporary lease from overstating what a property can sustainably produce. It also means a legacy rent, a below-market renewal, or a friend-and-family lease gets no benefit from a higher appraised number sitting right next to it on the file.
This is where the short-term rental question enters. If the long-term lease caps income too low to clear a lender’s coverage threshold, converting the property to nightly rentals looks like an obvious fix. Sometimes it is. But it isn’t a patch on the existing lease number — it’s a different qualification path entirely, with its own documentation, its own haircut, and its own eligibility rules.
Key Terms Defined
DSCR (debt service coverage ratio): the monthly rental income divided by the full monthly housing payment — principal, interest, taxes, insurance, and HOA dues, often called PITIA. A ratio of 1.00 means rent covers the payment exactly.
Below-market lease: a signed rental agreement priced under what the appraiser’s comparable-rent analysis says the unit could command today.
Form 1007 / Form 1025: the appraisal rent schedules used to estimate a property’s market rent — 1007 for single-family, 1025 for 2-4 unit buildings.
No-ratio qualification: a select-program path where the loan is reviewed without a published minimum coverage number, generally requiring a longer clean housing history and reduced leverage.
Business-purpose loan: financing made to an investor for a rental property, not a home the borrower lives in — reviewed under different rules than a standard owner-occupied mortgage.
How Lenders Actually Compare Lease vs. Market Rent
The rule is simple and symmetric: qualifying income is the lower of the signed lease or the appraiser’s market-rent opinion. It runs the same direction whether the lease sits above market or below it — the file never gets the benefit of the higher number.
On an occupied single-family rental, the appraiser fills out Form 1007, pulling comparable monthly leases nearby and adjusting for condition, size, and amenities to land on an “Indicated Monthly Market Rent,” as Blueprint’s breakdown of the form explains. For 2-4 unit buildings, the same function is handled by Form 1025’s operating income statement. The underwriter then places the lease and the appraisal side by side and uses the smaller figure to run the coverage math — rent divided by PITIA.
Say a duplex’s signed lease sits meaningfully under what the appraiser’s 1007 comps support. The file gets underwritten on the lease number, full stop. The higher appraised figure exists on paper but never touches the DSCR calculation. If that lease-based ratio clears a lender’s coverage floor, the loan moves forward on standard rental terms. If it doesn’t, the investor has two real options: get the tenant to a market-rate renewal before closing, or pursue the property as a short-term rental instead — a different income path altogether, covered next.
One nuance worth knowing: a vacant property skips this comparison entirely. With no lease in place, the appraiser’s market-rent opinion becomes the only number on the table, for better or worse.
Why STR Income Doesn’t Just “Fix” the Lease
Converting a below-market rental into a short-term listing does not raise the lease-based number — it replaces it with a separate qualification track, subject to its own program eligibility.
The reason comes down to how appraisal rules treat nightly income. Fannie Mae’s own appraiser guidance states clearly that it’s incorrect for an appraiser to take a nightly short-term rate and multiply it by 30 to create a monthly rent figure. That math ignores furnishings, cleaning and management costs, and the vacancy that comes with turnover-heavy bookings. Form 1007 is built around monthly lease comparables, not nightly rates. McKissock’s appraisal-education coverage confirms the form simply isn’t designed to translate short-term revenue into a rent figure used for lender review.
That’s why most programs that want to capture short-term upside skip the 1007 lease comparison. Instead, they use a dedicated short-term income method. In our network, this generally means one of two things: twelve months of documented operating history on a refinance, or the appraisal’s short-term-rent analysis on a purchase. Lenders count this income at roughly 80% of the gross amount. That discount exists because nightly income runs hotter and more seasonal than a signed twelve-month lease. This path is typically reserved for investors with prior landlord experience, and it isn’t compatible with no-ratio qualification.
So the sequence matters. An investor doesn’t take the below-market lease, add a short-term projection on top, and hope the higher number wins. The lease disappears from the equation, the short-term income methodology takes over completely, and the file is underwritten against that new number on its own terms.
The Mechanics, Step by Step
1. Identify the income source. Occupied long-term rental with an in-place lease, or a short-term operation with its own income history or appraisal analysis? These are two different files, not two inputs to the same one.
2. For the long-term path, the underwriter pulls the signed lease and the appraiser’s 1007 or 1025 conclusion, and uses the lower of the two.
3. For the short-term path, the file substitutes twelve months of platform or bank-statement history (on a refinance) or the appraiser’s dedicated short-term rent analysis (on a purchase), generally counted at a discount to gross rather than the full headline figure.
4. Run the ratio. rent used for lender review, whichever source produced it, gets divided by the full monthly payment to produce the coverage number. Most programs in our network want that ratio at 1.00 or better for full leverage; select programs will still review coverage between roughly 0.75 and 0.99 at reduced leverage, and a smaller group of lenders will review no-ratio files, generally requiring a longer clean housing history — subject to underwriting either way.
5. Confirm the property can legally operate short-term. Municipal permission has to be documented for that specific address — it’s never assumed for a city or a state, because short-term rental rules can vary by city, county, HOA, and property type. Investors should confirm local rules before relying on projected rental income.
That last step trips up more deals than the math does. Independent trade coverage on HOA restrictions and short-term rentals notes that a valid city permit does not override a homeowners association’s governing documents — courts in most states have upheld HOA short-term-rental bans when properly written into the CC&Rs. An investor can clear every underwriting hurdle and still own a property that legally can’t be listed nightly.
Where People Get This Wrong
“The lease is always the coverage figure.” No — it’s one half of a comparison, and the lower figure wins whether the lease sits above or below market.
“A city permit means I’m cleared to operate nightly.” A government permit and a HOA’s CC&Rs are separate approval layers. Satisfying one says nothing about the other.
“An AirDNA-style projection is a guaranteed income figure.” Treat any third-party market-data projection as a starting estimate, not a bankable number — projections for an individual address can vary meaningfully from what a property actually earns, which is one reason short-term income gets qualified at a discount to gross rather than the headline projection.
“I can informally negotiate a higher rent and use that instead.” Underwriting works from the documented, executed lease sitting in the file — not a verbal side agreement or an anticipated renewal.
Tradeoffs: Who This Fits and Who It Doesn’t
The below-market-lease-to-short-term pivot tends to work best for investors who already have a landlord track record. That’s because our network’s short-term income path generally wants prior experience owning income property. It also fits properties in areas where nightly rentals are clearly allowed, and where the HOA (if there is one) doesn’t restrict them.
It tends to fit poorly for a first-time landlord buying in a market where short-term legality is murky, or for anyone hoping to stack a short-term projection on top of an existing below-market lease rather than replacing it. It also doesn’t pair with no-ratio qualification — that path is reserved for standard long-term rental files in our network.
For larger holdings, the size ladder matters too. Our wholesale network runs a portfolio investor program from $150,000 up to $10,000,000, with the short-term-rental income methodology specifically capped at $2,000,000 and reserved for coverage at 1.00 or better. Leverage steps down as loan size grows — commonly up to 80% on purchases in the smallest tier, tightening at each larger tier and requiring case-by-case review above $4,000,000, always subject to underwriting. None of that changes the core lease-versus-market-rent mechanic described above; it’s simply the ceiling within which that mechanic operates.
Lendmire’s complete DSCR loans guide explains how property-level income qualification works more broadly. It covers how coverage ratios interact with leverage across property types. If you’re an investor weighing whether an override on a below-market lease makes sense for a higher-value short-term property, the luxury short-term rental DSCR override guide goes deeper into that scenario.
This is business-purpose financing for non-owner-occupied investment property. That means lenders review it differently from a standard owner-occupied mortgage right from the start. Qualification mainly depends on whether the property’s rental income covers the payment, subject to lender guidelines. It does not depend on the borrower’s traditional personal-income documents.
Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
This article is for general information only and isn’t legal or tax advice — investors should consult a qualified attorney or CPA about their specific situation before making a financing decision.
Frequently Asked Questions
My lease is above market, not below. Does that change anything? Not the mechanic — the lower-of-lease-or-appraisal rule runs the same direction either way. An above-market lease doesn’t get discounted down to the appraisal; the file simply qualifies at whichever figure is lower, which in that case would be the appraised market rent.
Can I use a projected short-term income number even without any operating history? In our network, the short-term income path on a purchase typically leans on the appraiser’s dedicated short-term rent analysis rather than a raw platform projection, and it’s generally reserved for investors with prior experience owning income property. A brand-new landlord with no track record may find this path harder to use.
If I convert to short-term rental, does the old lease still matter? Once the file is underwritten on the short-term income methodology, the prior lease figure isn’t part of that calculation — though the existing tenant’s lease terms still govern the property itself until it’s vacated or expires.
Does a lower appraisal ever help me? It can cut the other direction if the file is being underwritten on the appraisal because the unit is vacant — a low appraised market rent becomes the qualifying figure with no lease to offset it, which can compress coverage rather than help it.
What if the HOA doesn’t explicitly mention short-term rentals? Silence in the governing documents isn’t the same as permission. Investors should read the actual CC&Rs and confirm current HOA policy directly rather than assuming an omission means it’s allowed.
Are you weighing whether a below-market lease or a short-term conversion makes more sense for a specific property? Lendmire can help you compare DSCR loan options. We look at the property’s income, your credit profile, leverage, and your goals as an investor. Reach the team at 828-256-2183 to talk through the numbers.
Investors focused on short-term rentals can review DSCR loans for Airbnb and short-term rentals.
For current guidelines and terms, see Lendmire’s super jumbo DSCR loan programs page.
Self-employed borrowers can compare both super jumbo programs on Lendmire’s self-employed mortgages page.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage focused on DSCR investor financing, helping arrange programs through wholesale and investor-lending channels in 40 markets, including Washington, D.C. DSCR loans are evaluated by the lender on property cash flow rather than personal income, subject to lender guidelines, supporting LLC closings and accommodating investors with four or more financed properties. Scotsman Guide Top Mortgage Workplace in both 2025 and 2026.
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References
1. Blueprint — “What Is Form 1007?”
2. Fannie Mae Appraiser Update / STR & Form 1007 guidance
3. McKissock Learning — Form 1007 & STR Appraisals
4. AirROI — HOA Restrictions Glossary
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.
