You have a low rate on your current house and you do not want to give it up. So the plan is obvious: rent it out, use the rent to help you qualify, and buy the next one. Plenty of people will tell you that is how it works.
As of September 2 2026, on a conventional loan, it works differently than most people think. The rule changed, it did not get much attention, and getting it wrong is one of the most likely ways to blow up your plan at underwriting.
So here is what actually happens now, by loan type, and what to do if the answer comes back no.
Fannie Mae updated its Selling Guide on September 2 2026 and gave the house you are moving out of its own section, B3-3.8-05. Two things in it undo the standard advice.
First, a lease no longer counts. Fannie Mae does not permit a lease agreement for any departing residence. Signing a tenant this month to support a loan next month does nothing for you.
Second, the lender uses market rent instead. That number comes from an appraisal that includes market rents, a comparable rent schedule (Form 1007), or a market analysis tool like Zillow, Redfin or the MLS using at least three comparable rentals. In other words, you do not need a tenant at all. You need a believable rent number.
Lenders could start using the new rules right away and must use them for applications dated November 1 2026 or later.
The lender takes 75 percent of the market rent, then subtracts the full payment on the house you are leaving: principal, interest, taxes, insurance and HOA.
If the result is positive, it cancels out that payment and the old house drops out of your debt ratio. It does not add to your income, though. If the result is negative, the shortfall goes into your debts.
Here is a made-up example to show the math. The house would rent for $3,000 a month and the payment is $2,100. Seventy-five percent of $3,000 is $2,250, which covers the $2,100, so the old house stops counting against you. If the payment were $2,600 instead, the $350 gap goes into your ratio.
If you have less than 12 months of documented property management experience, the lender has to verify six months of the old house’s payment in reserves, on top of any other reserves the loan requires. On a $2,600 payment that is $15,600 you need to still have after closing.
Landlord history gets proven by looking backward: a recent tax return showing the property on Schedule E for a full year of fair rental days, a business return with Form 8825, or a lease dated at least twelve months before your application on a property that has not hit a return yet. If you have that history, the extra six months goes away.
If your current loan is FHA and you want to use the rent from the house you are leaving, HUD’s requirement is specific. You must be relocating to an area more than one hundred miles from your current principal residence, and the lender has to obtain an appraisal showing both the market rent and that you hold at least twenty-five percent equity in the property.
Both conditions, not either one. Moving across town does not qualify no matter how much equity you have, and having a job transfer three states away does not help if you are at ninety percent loan to value.
This one surprises people because it is the opposite of what they expect. FHA is the flexible program on down payment and credit, and the strict one here.
On a conventional loan, the rent can help, often more than people expect, because you no longer need a tenant lined up. What it will not do is add income on top of the payment. And if you have never been a landlord, you need the cash to cover six months of that payment.
On FHA, for most local moves, the answer is still no.
So two questions decide this. Does 75 percent of a realistic rent cover the payment? And do you have the reserves? If both answers are yes, the conventional route may work fine. If either one is no, here is what I look at next.
Sometimes 75 percent of the rent will not cover the payment, or the reserves are not there, or your tax returns make the debt ratio fail no matter what the rent does. That is where a different kind of loan comes in.
A DSCR loan does not measure you at all. It qualifies the property on the rent the property itself collects. Your personal income does not enter the file, your debt ratio does not enter the file, and your landlord history does not enter the file, because the loan is underwritten against the house.
Which opens a route that sidesteps the whole problem:
There is a real cost to all of this. DSCR and non-QM programs price higher than the conventional loan you are trying to keep. That trade is worth running properly rather than assuming, and it is exactly the conversation worth having before you list anything or sign anything.
On a conventional loan, often yes. Since September 2 2026 Fannie Mae has the lender use market rent from an appraisal, a rent schedule or a market analysis, not a lease. The lender takes 75 percent of that rent and uses it to offset the payment on the house you are leaving. If you have less than 12 months of landlord history, you also need six months of that payment in reserves. On FHA you must be relocating more than one hundred miles away and hold at least twenty-five percent equity.
Not on a conventional departing residence, not since September 2 2026. Fannie Mae does not permit a lease agreement for any departing residence. The lender uses market rent instead, so you do not need a tenant lined up to get credit for the rent.
On a conventional departing residence, 75 percent of the market rent, minus the full payment on that house. If the result is positive, it offsets the payment so the old house drops out of your debt ratio, but it does not add to your income. If it is negative, the shortfall counts as debt.
HUD requires that you be relocating to an area more than one hundred miles from your current principal residence, and that the lender obtain an appraisal evidencing market rent and at least twenty-five percent equity in the property. Both conditions have to be met. A local move does not qualify regardless of equity.
Often yes, but not by forcing the conventional file. The usual fix is to move the departing house onto a DSCR loan so it qualifies on its own rent and stops consuming room in your ratio, then qualify for the new purchase on a program that measures your income accurately. For a self-employed borrower that is typically a bank statement or 1099 program.
Sometimes, and it is a real calculation rather than a rule. You are weighing what the low rate saves you against what keeping it costs you in lost buying power on the next house. Run both numbers before deciding. I will tell you when the answer is to leave the loan alone, because frequently it is.
Rules cited here come from the Fannie Mae Selling Guide B3-3.1-08 and B3-3.8-05, updated September 2 2026, and HUD Mortgagee Letter 2023-17. Guidelines change without notice and individual lenders apply overlays on top of them.
Want to know if the rent will carry it?
Send me two things: what you owe on it and what it would rent for. I will tell you whether the rent covers the payment, how much of it a lender will actually let you count toward the next house, and what you would need in reserves.
No application. No documents. Nothing that touches your credit.
Text me: 704-890-7168Or call the same number
Scott Hastings, NMLS #926762. Mortgages by Scott, a division of Arbor Financial Group. 121 N Main St Ste 202, Mooresville NC 28115. Equal Housing Opportunity. Occupancy terms are set by your loan documents and loan program guidelines, which change without notice. General information, not a commitment to lend or an offer of credit. Message and data rates may apply.
Scott Hastings is a Licensed Mortgage Loan Originator and founder of Mortgages by Scott, bringing more than 20 years of experience helping clients achieve their homeownership goals. A native Charlottean and graduate of Charlotte Christian School and East Carolina University, Scott specializes in mortgage solutions for self-employed entrepreneurs, real estate investors, luxury homebuyers, and families seeking a more personalized lending experience.
Based in Mount Ulla, North Carolina, Scott is known for his hands-on approach, straightforward guidance, and commitment to making the mortgage process simple and stress-free. When he’s not helping clients secure financing, he enjoys CrossFit, traveling with his wife Stacey to dressage competitions, and spending time with family and friends on their farm. His mission is simple: provide the right mortgage strategy with exceptional service, without the red tape.
