If rental income may help you qualify for a mortgage, Fannie Mae has changed the rules your lender may use to review it. Fannie Mae announced the Selling Guide update on September 2, 2026, then revised the announcement on September 23. The update covers rent connected to the home you are buying, a home you are leaving, short-term rentals and other rental property.
Lenders may adopt the changes before December 1, 2026, but must use them for covered applications dated on or after that day. The update does not make rent count automatically or guarantee a mortgage approval. It gives lenders a more detailed framework for deciding which rental income can enter an application and which documents support it.
What did Fannie Mae change about rental income?
Fannie Mae reorganized its rental-income guidance into separate sections for common situations. Its Selling Guide announcement says the previous material had become difficult for lenders to navigate and apply consistently. Much of the update clarifies or relocates existing guidance, while several parts add policy.
The new policy addresses short-term rental income, strengthens lease standards and creates a framework for a departing residence. A departing residence is the home you are moving out of while buying another home. The update also standardizes how a lender handles rent from an investment property acquired shortly before the new purchase.
Those categories matter because the evidence is different in each case. A signed lease for another unit in the home you are buying does not tell the same story as tax records from an established rental property. A home you plan to rent after moving may not yet have the history that an existing rental has. The revised guide tells lenders to distinguish those situations instead of treating every rent claim alike.
What does it mean to use rent to qualify?
A lender compares your qualifying income with the debts and housing obligations it must count. Rental income can sometimes help that calculation, while a rental loss can add to the obligations. The rent someone agrees to pay is not necessarily the amount the lender can use.
The lender first has to establish that the property and rental arrangement fit the applicable rules. It then reviews acceptable evidence, such as tax records, a lease, an appraisal-related rent estimate or proof that a lease has taken effect. Which documents apply depends on the property, the transaction and your rental history.
The lender may also account for expenses or periods when rent is not collected. That is why a listing, verbal estimate or unsigned lease is not enough by itself. The goal is to reach a supportable qualifying figure rather than assume that gross rent will flow directly into your mortgage application.
Which homebuyers could notice the update?
You may encounter the revised rules if you plan to buy a property with more than one unit and rent the unit you will not occupy. They can also matter when the home has an accessory dwelling unit and you expect that space to produce rent.
The departing-residence framework is relevant when you intend to keep your present home as a rental after you move. Fannie Mae says this framework relies on market-supported rent, reserve requirements and limits on how rent can offset the old home's housing obligation. A lease remains useful evidence in many mortgage files, but the new framework does not treat a lease alone as the whole answer.
Buyers who own other rental property may see the reorganized documentation and calculation rules. People relying on short-term rental activity can face separate requirements based on the property type, their management experience and the history shown in the records. The guide also addresses investment property acquired within a short window before the home being financed.
Not every conventional mortgage follows Fannie Mae's Selling Guide. A lender may use Freddie Mac rules or a government-backed loan program instead. Even when Fannie Mae rules apply, the lender still reviews the complete application and any additional requirements it has adopted.
Why are leases getting more scrutiny?
Fannie Mae added standards for lease length, when the lease begins and how the lender confirms that its terms have taken effect. The update also addresses leases involving family members or another person connected to the transaction. These arrangements can require added support because they may not reflect the same market negotiation as a lease between unrelated parties.
A lender may compare the lease amount with market rent shown by an appraisal-related report. If the lease is not supported by market rent, the guide sets documentation rules for resolving that difference. This is meant to keep an unusually optimistic lease from carrying more weight than the local rental market supports.
For you, the practical lesson is to avoid building a purchase plan around a lease that the lender has not reviewed. Ask what evidence will be needed before you sign a contract, promise a move-in date to a tenant or assume rent will offset another housing payment.
How should you prepare before applying?
1. Describe every property and rental plan
Tell the lender whether you will occupy the property, rent another unit, use an accessory dwelling unit, convert your present home to a rental or rely on income from other property. A clear picture helps the lender choose the right section of the guide.
2. Gather records that show what actually happened
Collect signed leases, proof of rent received, tax documents, property expense records and mortgage statements that relate to the rental. Do not create a lease merely to fill a documentation gap. Ask which records the lender needs for your specific situation.
3. Ask when the lender is adopting the update
Before December 1, lenders can move to the revised policy on different schedules. Ask which version will govern your application and whether a change in the application date could change the review. If your file is already underway, ask whether the lender expects to recalculate rental income.
4. Connect the rent review with assistance
Down payment assistance has its own income, occupancy, property and first-mortgage requirements. Tell the participating lender about the rental plan and the assistance option at the same time. The North Carolina programs page can help you prepare, while the lender determines how the first mortgage and assistance rules fit your file.
What should you ask your lender?
Bring questions that reveal the rule, evidence and timing behind the lender's calculation:
- Is this mortgage expected to follow Fannie Mae's rental-income rules?
- Which rental category applies to my property and plan?
- What documents will establish the rent and show that a lease is in effect?
- Will the lender compare my lease with market rent?
- How will property expenses or a rental loss enter the application?
- Does my experience managing rental property affect the review?
- Which reserves, occupancy rules or assistance requirements also apply?
- If the lender adopts the revised guide while my application is pending, will anything need to be updated?
Ask for the answers before you depend on rent to set your home-search budget. A preapproval can also change when the property, lease or other facts change, so keep your lender informed as the transaction develops.
The bottom line
Fannie Mae's September 2026 update gives lenders more specific paths for reviewing rental income, especially for short-term rentals, departing residences, leases and recently acquired investment property. The required implementation date is December 1, 2026, although a lender may use the revised policy sooner.
The change is a documentation and underwriting framework, not a promise that projected rent will help you qualify. Explain your rental plan early, provide records that match the real arrangement and ask which rules the lender will apply. If down payment assistance is part of the purchase, start with the North Carolina program map and have a participating lender review the mortgage and assistance together. New to assistance? Read what down payment assistance is and how it works in North Carolina.