Here is a situation I run into often on the Eastside. Someone has owned their home for a few years, has real equity and a low locked-in rate, and does not want to sell it. They would rather keep it, rent it out, and buy the next place. On paper it is a smart move. In practice, it used to hit a wall at the lender.
The wall had a name most people never heard until they were stuck against it: the departing-residence catch-22.
The Old Catch-22
To qualify for the new mortgage, your lender looks at your debt-to-income ratio (DTI): all your monthly payments against your income. If you are keeping the old house, that old mortgage payment counts against you unless the rent it will earn can offset it.
The catch was when the rent could count. Under the old approach, if the property was not already showing rental income on your tax return, lenders generally wanted a signed lease to prove the rent was real. Fair enough. Except you cannot sign a real lease until a tenant moves in, a tenant cannot move in until you move out, you cannot move out until you close on the new house, and you cannot close until the rent counts. Which it does not, because you have no lease yet.
The chicken needed the egg, the egg needed the chicken, and the bank needed both notarized.
The people it hurt most were exactly the ones making a responsible move: keep the asset, rent it at market, buy the next home. They just could not carry two full mortgage payments on paper long enough to break the loop.
What Changed
Fannie Mae issued Announcement SEL-2026-08 on September 2, 2026, and rewrote the rulebook for this exact scenario. The relevant section of the Selling Guide is B3-3.8-05, Rental Income from Non-Subject Property: Departing Residence. It is mandatory for loan applications dated on or after November 1, 2026, and lenders can apply it now.
The core shift is simple, and it is the whole point of this post:
For a departing residence, a lease agreement is no longer required, and in fact is no longer even permitted. The rent is established by market rents instead.
Read that twice if you are in this spot. The thing that created the loop, needing a signed lease before you could qualify, is gone for this specific case.
How the Rent Gets Counted Now
Under B3-3.8-05, to use rent from the home you are leaving, your lender documents the market rent using one of these:
- a full appraisal that includes market rents, or
- a Single-Family Comparable Rent Schedule (the standard Form 1007), or
- market analysis tools such as Zillow, Redfin, or the MLS, using at least three comparable rentals from the same area.
No tenant, no signed lease, no chicken-and-egg. You also need to document your current housing payment, and for a multi-unit property there are extra tax-return steps for any already-rented units.
Then the qualifying math works like this:
- Take the monthly market rent and multiply it by 75%. (The 25% haircut is the standard vacancy and maintenance cushion; lenders never count 100% of rent.)
- Subtract the full monthly payment (principal, interest, taxes, insurance, and any HOA, together called PITIA) on the departing home.
That result is your adjusted net rental income.
- If it is positive, it can be used to cancel out the old home's payment so that mortgage stops dragging down your ability to qualify for the new one.
- If it is negative, the shortfall gets added to your debts.
The One Limit Worth Understanding
There is an important nuance, and I would rather you hear it from me now than from a lender later. For a departing residence, positive rental income can only be used to offset the old home's own payment. It does not become extra income that boosts how much house you can buy overall.
In plain terms: the new rule can make your old mortgage payment stop counting against you. It does not hand you a raise. If the market rent comfortably covers the old payment, that old mortgage effectively drops off your DTI, which is often exactly enough to get the new purchase approved. That, by itself, is a big deal for a lot of move-up buyers. Just do not expect it to also stretch your budget upward.
The Reserve Requirement
One more piece to plan for. If you have less than 12 months of experience managing a rental, which describes most first-time landlords, the lender must verify you have six months of the departing home's full payment set aside in reserves. That is on top of any reserves already required for other financed properties.
So the practical checklist before you count on this: have a sense of the market rent, and have roughly six months of that home's payment sitting in reserve. If both are true, converting-and-buying becomes far more workable than it was even a few months ago.
Why This Matters Here
On the Eastside, plenty of homeowners are sitting on a rate in the 3s and a home that would rent well. Selling to buy means giving up that rate for good. Keeping and renting lets you hold the asset and the rate, and this rule change quietly removes the biggest financing obstacle to doing exactly that. It is the difference between "I would love to keep it but I cannot make the numbers work for the next purchase" and "let's run the numbers, because they might work now."
The Honest Bottom Line
I am a real estate broker, not your lender, and the details of any single approval come down to your full financial picture and the loan officer running it. What I can tell you is that a genuine barrier just came down. If you have been assuming you have to sell your current home to buy the next one, that assumption is worth revisiting.
If you are weighing keeping your Eastside or Seattle home as a rental while you move up, reach out and let's map out whether the numbers work, and I am glad to connect you with a lender who is already up to speed on the new departing-residence rules. It is a conversation worth having before you list.
This post summarizes Fannie Mae Announcement SEL-2026-08 and Selling Guide section B3-3.8-05 as published September 2, 2026, effective for applications dated on or after November 1, 2026. It is general information, not lending, tax, or legal advice. Guidelines change and individual lenders apply overlays; confirm current requirements and your own eligibility with a licensed mortgage professional.
Opinions expressed are those of the author and do not necessarily reflect the views of eXp Realty.