The Quick Read: The income figure underwriting counts is lower than the one you offered on, while taxes, insurance, and HOA dues stay the same, so the maximum loan falls by a larger percentage than the income did. A 10% income miss can take roughly 14% off the loan in a typical fixed-cost setup, and the lower of the coverage limit and the leverage limit sets the final amount.
- The loan is sized from the rent the lender counts, not from the number on your offer-day spreadsheet.
- Fixed costs make the loan shrink faster than the income does.
- Two limits apply at once: coverage (rent versus payment) and leverage (loan versus value). The lower one binds.
- Most programs in the network start at 1.00 coverage, and short-term-rental purchases top out at 75% LTV, subject to lender guidelines.
- Your best protection is a cash cushion and a financing contingency written before the offer.
What Is the Number That Dropped?
The AirDNA figure is a modeled estimate, not a booking record. AirDNA’s help center says its Rentalizer tool estimates revenue, average daily rate, and occupancy from similar nearby active listings, using a weighted average. It also factors in seasonality, demand, and revenue growth.
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 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.
Two details matter to a borrower. The projected revenue includes the cleaning fee, but it leaves out the host fee, other fees, and taxes. So the headline is gross host revenue, not what you keep.
The same page describes a Comp Set Strength score. It runs higher when comparable listings earn similar amounts. AirDNA gives a spread of $50,000 versus $200,000 among comps as an example of a mix that scores low.
That tells you what a “drop” usually is. The model re-ran on a different set of comparable listings, a different date, or a different season window. Your property did not suddenly earn less.
How Does Underwriting Turn That Number Into a Loan?
Underwriting picks an income basis, applies the program’s coverage test, then sizes the loan. A DSCR loan qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. The coverage ratio is qualifying monthly income divided by PITIA. PITIA is principal, interest, taxes, insurance, and association dues.
Here is the sequence on a short-term-rental file.
1. You write the offer. You model the deal on an AirDNA figure or an agent’s pro forma.
2. Underwriting picks the income basis. Depending on the program, that can be documented platform history, a market-based projection for the property, or the appraiser’s long-term rent schedule as a fallback. Many programs we place files with also expect about 12 months of hosting history on short-term-rental files.
3. The report is pulled for the file. That happens during underwriting or appraisal, not on offer day. The comp set may have moved since you ran your numbers.
4. Qualifying income is set. Programs often count less than the full headline figure. How much less depends on the program, so ask before you write the offer.
5. The ratio is recomputed. A lower numerator over the same payment gives a lower ratio.
6. The loan is resized. The lender finds the largest loan the income can carry at the program’s coverage level, then caps it by leverage.
Step 6 is where the real damage happens. Work it backward. Take the qualifying income and divide it by the coverage the program requires. That gives the most monthly payment the property can carry. Subtract taxes, insurance, and dues. What remains is the principal-and-interest payment the loan may carry. That payment sets the loan balance.
Why Does the Loan Shrink More Than the Income?
Taxes, insurance, and HOA dues do not fall when income falls. Only the principal-and-interest slice has to absorb the whole hit. That slice is the part that determines loan size.
Run the numbers on an index. These are modeled assumptions, not market data. Set qualifying income at 100. Assume the program wants 1.00 coverage, so the full monthly payment can be 100. Assume taxes, insurance, and dues take 30 of that. The principal-and-interest slice is 70, and the loan is sized to it. Hold the term and pricing constant so only income changes.
| Income miss | Income counted | P&I slice left | Loan shrinks by |
|---|---|---|---|
| 5% | 95 | 65 | about 7% |
| 10% | 90 | 60 | about 14% |
| 20% | 80 | 50 | about 29% |
| 30% | 70 | 40 | about 43% |
A 10% miss takes about 14% off the loan. A 20% miss takes about 29%. The loan falls roughly 1.4 to 1.5 times as fast as the income in this setup.
The multiplier depends on how much of your payment is fixed. A property with heavy taxes and dues, such as a condo with large association dues, sees a bigger multiplier. A property with light fixed costs sees a smaller one.
A program that wants more than 1.00 coverage makes it worse. Stronger ratios open better pricing and leverage, so a drop can also push you into a weaker pricing tier, not just a smaller loan.
Lendmire’s complete DSCR loans guide walks through the ratio itself if you want the basics first. If you want the sizing side only, Lendmire’s piece How a DSCR Lender Sizes an Offer After the AirDNA Projection Drops covers it in detail.
Two Ceilings: Which One Binds?
Value and rent each set their own ceiling on the loan. The lender uses the lower one. That is why a rent miss and a value miss behave differently.
| Item | Coverage ceiling | Leverage ceiling |
|---|---|---|
| Set by | Rent used for lender review vs. payment | Appraised value or price |
| Moves when | AirDNA or rent figure drops | Appraisal comes in low |
| Typical purchase limit | Program coverage floor | 75%–80% LTV on a purchase |
| Short-term rental | 1.00 floor on purchases | Up to 75% LTV on a purchase |
LTV is loan-to-value: the loan amount divided by the property’s value. On most investment-property purchases, programs in the network land at 75%–80% LTV, subject to lender guidelines. Short-term-rental purchases top out at 75%.
Say the appraisal supports the price and your leverage ceiling is intact. A rent drop can still push the coverage ceiling below the leverage ceiling. Then coverage binds, the loan shrinks, and you bring more cash.
A rent-only miss lowers the coverage ceiling. A value-only miss lowers the leverage ceiling. Both can happen together, and the loan follows whichever is lower.
A larger down payment lowers the payment and can lift coverage. It never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.
Why Does the Number Drop After the Offer?
Most drops come from the process, not the property. These are the usual causes.
- A different report date. The report that supports your loan is run at underwriting or appraisal time. Your offer-day report may be weeks old by then.
- A refreshed comp set. Listings come and go. When high earners drop out of the comp set, the weighted average falls.
- A different season window. A report pulled in peak season reads higher than one pulled in a slow stretch.
- Thin comps. BNBCalc’s review of AirDNA says property-level Rentalizer estimates can run 15–30% off in thin markets. It suggests discounting the estimate by 15–25% where active listings are scarce.
- A different income basis. The lender may count a lower or more conservative figure than the one you modeled. Many programs lean on the lower supported figure when two sources disagree.
- A fee mix-up. The headline includes cleaning fees. If you treated the whole figure as net rent, you started too high.
Direction of error is disputed. VaultSTR says independent tests and operator reports put Rentalizer 15–30% off actual results, with misses skewing high. It suggests underwriting year one at 60–75% of the estimate. A host in a BiggerPockets thread reported the opposite: projected occupancy of 67% against 76% actual, with revenue about 20% low. That is one anecdote, so treat it as a reminder that accuracy varies by property and market.
The practical lesson is simple. Do not assume a high or a low miss. Assume the lender’s number can differ from yours and plan for it.
Whose Number Counts?
Three numbers can show up on one file: yours, the lender’s pulled report, and the appraiser’s analysis. The lender reconciles them. Many programs use the more conservative supported figure.
The appraiser’s long-term rent schedule is the fallback. That schedule typically comes from Form 1007 for single-family homes and Form 1025 for two-to-four-unit properties. Class Valuation notes that Form 1007 is a long-term rent form and should not support short-term-rental income. It says short-term-rental income needs a separate narrative addendum.
So when a file falls back to the long-term rent schedule, the ratio can land well below what a short-term-rental basis would show. A converted long-term rental, or a property with no hosting history, makes the projection carry more weight. A drop hurts most there.
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.
What Moves After the Offer, and What Can You Still Do?
| Stage | What can change | What you can still do |
|---|---|---|
| Before offer | Nothing is locked | Model a haircut income figure |
| In contract | Comp set refreshes | Use your financing contingency |
| Appraisal | Value and rent schedule | Request a review with better comps |
| Underwriting | Income basis, tier | Add cash, change structure |
| After closing | Nothing resizes | Plan any future refinance |
A drop after closing generally does not resize an already-funded loan. The loan was sized at origination. A later refinance would measure income again, so the drop would matter then.
Your Options, in Order
Work down this list. Start with the fixes that cost you the least cash.
| Lever | Effect on ratio | Cash impact | Tradeoff |
|---|---|---|---|
| Correct the comp set | Raises income counted | None | Only works if comps are wrong |
| Add down payment | Lowers payment, lifts ratio | More cash up front | Ties up capital |
| Renegotiate price | Helps only if payment falls | Less cash overall | Seller may refuse |
| Change structure | Can lower the payment | Varies | Terms differ by program |
| Switch income basis | May raise or lower | None | Depends on history |
| Walk away | None | Protects deposit | Only inside the contingency |
A few notes on that table.
Correct the comp set first. If the lender’s report includes outliers or mismatched listings, ask for a re-run with corrected comparables. A cleaner comp set can move the number without costing you anything.
Add cash second. More down payment shrinks the loan, which lowers the payment and lifts coverage. Remember that reserves are separate. Programs in the network commonly want about 6 months of PITIA in reserves, and about 9 months above $1,500,000, though this varies by lender, leverage, loan size, and transaction type.
Renegotiating price helps only when the payment falls. DSCR is rent over payment. A lower price with the same loan amount does nothing. A lower price that reduces the loan does.
Structure changes can help. Extended terms of 40 years and interest-only periods are available through select lenders in the network. ARM structures exist for investors who want them. Terms differ by program, so each is a conversation, not a default.
Lower-coverage paths exist, with trade-offs. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. A no-ratio path is available only through select lenders, generally for borrowers who already own a primary residence. Both come with stricter terms, so they are not a free pass.
Across our wholesale network, a drop that leaves coverage near the program floor usually gets solved with a bit more cash, not a new program. The files that struggle are the ones where the buyer had zero cushion and no contingency.
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.
When Should You Renegotiate or Walk?
Use this checklist once the lender’s number lands.
- Is the lender’s figure supported or an outlier? If the comps are wrong, push to correct them before anything else.
- Can you cover the gap in cash and keep your reserves? If not, the deal is too tight.
- Does the property still make sense at the lower income? If the deal only works on the high number, it was never a safe deal.
- Is your financing contingency still open? If so, you can exit. If it has expired, your deposit is at risk.
Clearing 1.00 is also not the same as positive cash flow. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital expenses sit outside the calculation. A file that clears coverage can still run thin in real life, so size your cushion to the property, not just the ratio.
Before You Write the Next Offer
Model the deal at a haircut income, such as the 60–75% range VaultSTR suggests for year one. Pull the comp set and Comp Set Strength, not just the headline revenue. Ask the broker which income basis the program uses before you write the offer. Keep a financing contingency and a cash cushion for a resize.
If a lower figure still works at those assumptions, a later drop is an annoyance, not a crisis. For a closer look at how this plays out once an offer is in, see Lendmire’s piece Can You Still Get a DSCR Loan if AirDNA Drops After Your Offer?.
Key Terms Defined
DSCR (debt service coverage ratio): the property’s qualifying monthly rent divided by its full monthly payment.
PITIA: principal, interest, taxes, insurance, and association dues, which together make up the full monthly payment.
LTV (loan-to-value): the loan amount divided by the property’s value, which sets the leverage ceiling.
Qualifying income: the rental figure the lender actually counts, which can be lower than a projection.
Comp set: the group of similar nearby listings a tool or appraiser uses to estimate income.
Comp Set Strength: AirDNA’s score for how consistent the comparable listings are with each other.
Reserves: liquid funds you keep after closing, commonly measured in months of PITIA.
Frequently Asked Questions
Does the loan shrink even if my appraisal supports the price?
Yes, it can. The appraisal sets only the leverage ceiling. If the lender counts less rental income, the coverage ceiling can fall below the leverage ceiling, and the lower one binds. You then bring more cash, even though the value held up.
Can I ask the lender to re-run the AirDNA report?
You can ask, and it makes sense when the comp set looks wrong, such as mismatched sizes, outliers, or a different market. Whether the lender agrees depends on the program and the file. A corrected comp set can raise the counted income without asking you to bring any extra cash.
Does a drop change a loan that has already funded?
Generally not. The loan was sized when it originated, so a later drop does not resize it. It would matter at a future refinance, when income is measured again.
What if the property has no hosting history?
Then the file leans on a market-based projection or the appraiser’s long-term rent schedule, depending on the program. That makes the AirDNA figure carry more weight, which is why a drop hurts most on converted or newly listed properties. Many programs we place files with also expect about 12 months of hosting history on short-term-rental files, so ask early.
Is AirDNA’s number net income?
No. It is gross host revenue and includes cleaning fees, per AirDNA’s own help page. It leaves out the host fee, other fees, and taxes. Treating it as net rent overstates what the property keeps.
Next Step
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 broker that arranges financing through select lenders in its wholesale network, across 41 markets including Washington, D.C. Tax treatment varies; consult a qualified professional.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage built around DSCR investor lending, with programs available in 41 markets, including Washington, D.C. DSCR lenders commonly evaluate rental-income coverage instead of personal income paperwork, a practical fit for LLC-owned and multi-property investors. Terms vary by lender, property, leverage, and program. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. AirDNA Help – Rentalizer Revenue Calculator
3. VaultSTR – AirDNA Rentalizer accuracy
4. BiggerPockets forum – AirDNA accuracy thread
5. Class Valuation – Form 1007 and short-term rentals
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much Purchase Cash a DSCR Loan Can Recoup on a Rental · How Much of a Portfolio DSCR Loan Passes to a Buyer of One Rental · How Much One DSCR Loan Lends Across Houses, Duplexes and Condos
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
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- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
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.