Potentially—but a projected Airbnb revenue screenshot is not a mortgage approval. Fannie Mae's subject-property short-term-rental guidance addresses a one-unit investment-property purchase that is legally permitted for STR use. For a purchase, the lender can use a standard long-term-rent schedule or validated STR comparable data from an MLS or property manager, applies a 50% factor to monthly gross rent, then subtracts the property's full monthly principal, interest, taxes, insurance, and association dues (PITIA). A positive result may offset the property's PITIA only; a negative result counts in debt-to-income analysis. Ask the lender whether it is implementing the policy for your application and what evidence it will accept before you make an offer.
Check the rule's timing and property eligibility first
Fannie Mae's September 2026 announcement, reissued September 23, encourages lenders to implement the revised rental-income policy immediately and requires it for loans with application dates on or after December 1, 2026. A lender may adopt it earlier, but a buyer should not assume every loan officer or product is using it today. Get a written answer on the intended application date, lender overlays, and whether this is a Fannie Mae-eligible conventional investment-property loan rather than a DSCR or portfolio product.
Trying to buy an STR but unsure whether projected rental income will count toward financing? Book a BNB Accelerator acquisition call to align the property search with a lender-confirmed financing path before writing offers.
The Fannie Mae STR-income topic limits this treatment to a one-unit investment property legally permitted to operate as an STR, with applicable local registration and licensing. It excludes STR income from an accessory dwelling unit under this topic. This is not a route to treat a second home or primary residence as an investment property. Obtain the address-specific permit and HOA evidence; see the permit-transfer guide and HOA diligence guide.
Ask which rent-evidence path the lender will use
For a purchase, Fannie Mae permits either a Single-Family Comparable Rent Schedule (Form 1007) based on standard long-term rentals or validated STR rental data from an MLS or property management company. The STR path requires three comparable properties, rates, days rented in the last calendar year, and relevant factors affecting STR use; same-market comparables are preferred when possible. The lender must retain the documentation. An AirDNA estimate, seller spreadsheet, or attractive Airbnb listing does not by itself satisfy the specified validated-data path. Read what lenders do with AirDNA numbers separately from this rule.
| Buyer question | Evidence to request | Decision consequence |
|---|---|---|
| Is the address eligible? | Current local STR permission, license path, HOA and covenant review | No eligible use means no STR-income path for that address |
| Which monthly gross rent will the lender use? | Form 1007 long-term rent or three validated STR comps from MLS/manager | A higher seller projection may not affect qualification |
| How will the rent be treated? | Written lender calculation of gross rent, 50% factor and PITIA | Positive result offsets PITIA only for this purchase rule |
| What else must the buyer qualify for? | Income, liabilities, credit, cash to close, reserves and product terms | Property rent does not replace full loan approval |
Ask the lender to show the selected source and unit consistency. For daily STR comps, the guide describes averaging the rates and the days rented across the three properties to establish monthly market rent; do not mix annual booked nights with a monthly payment. A property manager's report should document actual comparable rental activity, not only asking rates. The lender decides whether the comparables and borrower file satisfy current policy.
Work the qualifying calculation without mistaking it for profit
Illustrative only: suppose validated market gross rent is $8,000 a month and the subject property's PITIA is $3,500. Under the purchase method, $8,000 × 50% = $4,000 net rental income for qualification; $4,000 − $3,500 = positive $500 adjusted net rental income. Fannie Mae says that positive amount may offset the PITIA only, rather than being added as $500 of free-standing income. If PITIA were $4,500 instead, the result would be negative $500 and would be included in the borrower's debt-to-income ratio. These numbers are not a lender preapproval or a property operating forecast.
The 50% factor is a qualifying convention that Fannie Mae says accounts for vacancy and maintenance; it is not a guarantee that your real costs equal 50% of gross. Separately model cleaning, management, utilities, insurance, property tax, repairs, replacements, platform fees, seasonality and launch ramp using the revenue framework and downside case. A deal can pass loan qualification yet fail your investment threshold—or the reverse.
Do not assume rental income from a second home can be used the same way. Fannie Mae's general rental-income guidance distinguishes property occupancy and borrower history; the lender must apply all relevant eligibility and documentation rules. The subject-property STR purchase topic is narrower than a general claim that 'Airbnb income counts.'
Make the financing answer part of the buy decision
Before an offer, send the lender the address, intended investment use, proposed ownership, local STR permission, purchase price, expected PITIA, and the source of comparable rent evidence. Ask for a written explanation of the rental-income method, any lender overlay, the application-date policy version, cash to close, required reserves and appraisal or property-condition conditions. Compare a conventional path with a DSCR quote if both are genuinely available; the conventional-versus-DSCR guide lays out the tradeoff. Obtain actual Loan Estimates and compare total payment and cash needed, not merely a headline rate.
Proceed when the lender confirms a viable product and evidence, the property has a legal STR path, and your independent downside model meets your own hurdle. Renegotiate if a lower lender-supported rent or higher PITIA reduces buying power and changes the price the deal can support. Extend diligence or reject the property if permission or lender acceptance cannot be established before the financing contingency expires. Book a call to source STR deals inside a lender-verified buy box. BNB Accelerator cannot approve a loan, guarantee a permit, or promise rental income or returns. This guide is educational, not lending, legal, tax or investment advice. Confirm current policy and your specific terms with a qualified lender and advisers.
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Frequently asked questions
Can I use projected Airbnb income to qualify for a Fannie Mae investment-property purchase?
Potentially, for an eligible one-unit investment property legally permitted for STR use, using the lender's approved rent evidence and calculation. Ask when the lender implements the September 2026 policy and whether any overlays apply.
Is an AirDNA estimate enough for the Fannie Mae STR-income method?
Not by itself under the specified purchase paths. The lender can use a long-term-rent Form 1007 or validated STR comparable data from an MLS or property manager that meets Fannie Mae's documentation criteria.
Does a positive STR rent calculation increase my qualifying income?
For this subject-property purchase rule, Fannie Mae says a positive adjusted net rental income may offset the property's PITIA only; a negative amount is included in debt-to-income analysis.
When must lenders use the revised rental-income policy?
Fannie Mae encourages immediate implementation and requires the changes for loan applications dated on or after December 1, 2026, according to its September 23, 2026 reissued announcement.