Lenders do not cut you off after one rental, or after four. Fannie Mae’s rules run to ten financed properties. What tightens long before the tenth is the cash a lender has to see sitting in your accounts after closing, and it climbs with every rental you already own.
How many mortgages can you have at once?
The cap depends on what you are buying, not on how many mortgages you hold. Fannie Mae’s Selling Guide topic on multiple financed properties, updated in November 2025, puts the maximum for a second home or an investment property at “DU - 10”. DU is Desktop Underwriter, Fannie Mae’s automated underwriting system. For a home you live in there is no limit, apart from a HomeReady loan, where it is two.
The Selling Guide is the rulebook for loans Fannie Mae buys, so a lender that plans to sell your loan on underwrites to it. A lender can also stop sooner on its own. Ten is a ceiling, not a promise.
What counts as a financed property?
The count covers one- to four-unit residential properties where you are personally obligated on the mortgage, and it includes the house you are buying. The guide is specific about the edges:
- A duplex, triplex or fourplex counts as one property, not as two, three or four.
- Two mortgages on the same house count as one property.
- A property you own with someone else counts once, not once per borrower.
- A mortgage counts even when its payment is left out of your debt-to-income ratio.
Four kinds of real estate stay outside the count: commercial property, any building with more than four units, a timeshare and a vacant lot. So does a manufactured home on leased land when the lien sits on the home rather than the land.
One line in the guide does a lot of work. Property financed in a company’s name, where you are not personally obligated on the mortgage, is not counted. The guide’s own example gives a borrower four two-unit rentals held in an LLC they half own, and counts two financed properties rather than six. What a lender looks at is the personal obligation, not the deed. Whether that structure fits your situation is a question for an attorney.
Does the home you live in count?
If it carries a mortgage, yes. The guide counts your principal residence in the number of financed properties. A financed building lot does not count: in another of its examples, a borrower who owns a lot, a second home and two rentals and buys two more rentals ends at five financed properties, not six.
This is where the two rules part company. Your own home counts toward the ten, and its loan balance is still left out of the reserve percentage below.
What has to be in the bank before the next one closes?
Reserves are money that stays in your accounts after closing, measured in months of the new loan’s full payment: principal, interest, property taxes, insurance and any association dues. Under Fannie Mae’s minimum reserve requirements, DU asks for six months on an investment property, two months on a second home, and nothing at all on a one-unit home you live in.
A second layer lands on top, and that is the one that grows. You have to show a share of what you still owe across your other financed properties:
- 2% when you will have one to four financed properties
- 4% at five or six
- 6% at seven to ten, and through DU only
The share applies to the mortgage and HELOC balances on the others. It skips the house you are buying, the home you live in, anything sold or under contract to sell, and any balance paid off at closing.
Say each rental is the same $250,000 house, bought five years ago with 20% down on a 30-year loan at 7%, so $188,263 is still owed on each one. Your own home is paid off. The next purchase is another house just like them, with $3,000 a year of property tax and $1,400 of insurance, which puts its full monthly payment at $1,697. Six months of that is $10,184.
| You own 2 | You own 4 | You own 9 | |
|---|---|---|---|
| Six months of the new house’s $1,697 payment | $10,184 | $10,184 | $10,184 |
| 2%, 4% or 6% of what you owe on the others | $7,531 | $30,122 | $101,662 |
| Reserves before you close | $17,715 | $40,306 | $111,846 |
These are example figures, not a forecast for any market.
Own two and the new house is your third financed property, so the rate is 2% of $376,526. Own four and it is your fifth, which moves the rate to 4% of $753,053. Own nine and it is your tenth, the last one these rules allow, at 6% of $1,694,369.
Why is the fifth rental harder than the second?
The down payment hardly changes across those three columns. The reserve grows more than six times over, from $17,715 to $111,846, because it tracks the debt you already carry rather than the house in front of you. Cross from four to five and the rate doubles on a balance that has also grown.
Reserves are not spent, but they have to be liquid and yours. Fannie Mae counts checking and savings, stocks, bonds, mutual funds, certificates of deposit, money market funds, trust accounts, the vested share of a retirement account, and the cash value of a vested life insurance policy. It does not count unvested funds, stock in an unlisted corporation, non-vested options or restricted stock, a personal loan, rent-back credit, or cash you take out of the property you are refinancing.
One rule runs the other way. If you are buying two rentals at the same time, the same assets can satisfy both applications, because reserves are not added together across simultaneous second home and investment purchases.
What happens when you reach ten?
A lender that keeps the loan on its own books writes its own rules, and the common route past the agency limit is a loan underwritten on the property’s income instead of yours. What one of those asks for is set out in the DSCR loan post.
Before that, the cheaper lever is rent you already collect. Existing rentals can help you qualify for the next loan, after the lender applies its own haircut, which using rental income to qualify walks through.
How do you plan for the next one?
- Run the house in the rental calculator. Its cash invested line covers the down payment, closing costs and any work before the first tenant. The whole cash picture, reserves included, is in how much money a rental takes.
- Count your financed properties the way DU will, the house you are buying included. On a purchase, DU adds one for that house when it has to fall back on your credit report.
- Add six months of the new payment, then the share of what you owe elsewhere.
Then ask your lender what they will enter in the Number of Financed Properties field, because that one entry decides whether you are at 2%, 4% or 6%. If the next one is your second, how to buy a second rental property covers the timing.