Type $2,200 of rent into the rental calculator’s example house and the verdict is “This deal doesn’t work.” After the mortgage and every running cost, owning it would cost you $3 a month.
The case for buying it anyway rests on later years, when the rent has passed the costs and the house sells for more than you paid. You can put numbers on both before you buy.
What does negative cash flow mean on a rental?
Negative cash flow means the rent doesn’t cover what the house costs to own each month, the mortgage included, so you pay the difference from your own pocket. This line-by-line example builds the number for the same $250,000 house at $2,750 a month, where it keeps $420.
The example here is that house with the rent at $2,200. It’s bought with 20% down on a 30-year loan at 7%, plus 3% closing costs, and pays $3,000 a year of property taxes and $1,400 of insurance. It sets aside 5% of the rent for empty months and 10% for repairs and big repairs, and pays a property manager 8%. After the $1,331 mortgage payment, it comes up $3 short each month, $39 over the first year.
A loss that small looks harmless. The calculator’s reading says the deal “does not quite pay for itself, and there is no room for anything to go wrong.” Any empty month or repair beyond the set-asides comes straight from your savings.
How can a rental that loses money still pay off?
A rental that loses money each month can still come out ahead when you sell it. While you own it, the value can rise, the rent can climb, and every mortgage payment pays off part of the loan. The higher value and the smaller loan stay locked in the house until you sell or borrow against it.
Below, the house is held ten years and sold, with everything counted. The example assumes the rent and the costs both rise 2% a year, and that selling costs 7% of the price, for the agent’s commission and closing. The columns differ only in how fast the value grows.
| Value up 3% a year | Up 2.1% a year | Value flat | |
|---|---|---|---|
| Cash you put in: down payment and closing costs | −$57,500 | −$57,500 | −$57,500 |
| Cash flow over the ten years | +$14,735 | +$14,735 | +$14,735 |
| Sale price in year 10 | $335,979 | $307,750 | $250,000 |
| Selling costs (7%) | −$23,519 | −$21,543 | −$17,500 |
| Loan paid off at the sale | −$171,625 | −$171,625 | −$171,625 |
| Ahead after ten years | +$98,070 | +$71,817 | +$18,110 |
These are example figures, not a forecast for any market.
The first year’s $39 loss is inside the cash flow row. Rising rent turns the cash flow positive in year 2, and by year 10 the house clears $3,068 a year. Even with a flat value it comes out ahead: the mortgage payments take $28,375 off the loan, more than the $25,000 it cost to buy and sell, and the $14,735 of cash flow comes on top.
How does the 10-year return count the losses?
The 10-year return counts every monthly loss as more money you put in. It’s an internal rate of return, or IRR: one yearly rate for the whole time you own the house, counting when each dollar moves, so a dollar back in year one is worth more than one back in year ten. For this house it’s 10.8% a year at 3% growth, 8.8% at 2.1% and 2.9% with a flat value. How to calculate ROI on a rental works one through on the same house at full rent.
A saved property’s 10-year return is built from the same rows. Your $57,500 goes in on day one, and each year’s cash flow after the mortgage lands at the end of that year. In year 10 the sale adds the price, less the selling costs and the loan balance it pays off. It’s all before income tax, which the calculator doesn’t work out.
Appreciation vs. cash flow: which one is this house counting on?
At 3% growth, this house is counting mostly on appreciation, the rise in its value. Only $14,735 of the $98,070 reaches you as cash flow along the way. The rest waits for a buyer in year 10, at whatever price the market sets then. Take the growth away and the $98,070 shrinks to $18,110.
The growth rates in the table are the example’s, and the middle one matches the latest national figure. The Federal Housing Finance Agency’s release of August 25, 2026, the latest as of September 2026, puts U.S. house prices up 2.1% between the second quarter of 2025 and the second quarter of 2026 (FHFA). Prices fell in four states over that year, and rose in 76 of the 100 largest metro areas. A national figure says little about one street.
Rent growth matters too. In the consumer price index, the rent tenants pay for their homes rose 2.7% in the 12 months to August 2026 (Bureau of Labor Statistics). Hold this house’s rent flat while its taxes and insurance keep rising 2% a year, and the loss grows to $898 in year 10, adding up to $4,571 from your pocket over the decade. The 10-year return falls to 8.9% at 3% growth, 6.6% at 2.1%, and −0.2% with a flat value: $1,196 less than you put in.
What has to go right when the loss is bigger?
The bigger the monthly loss, the longer you pay it and the more the price has to rise to make up for it. Here’s the same house at three rents, with rent and costs rising 2% a year as before.
| $2,200 rent | $2,000 rent | $1,800 rent | |
|---|---|---|---|
| Cash flow each month in year 1 | −$3 | −$157 | −$311 |
| Years it loses money | 1 | 7 | All 10 |
| Paid from your pocket in those years | $39 | $7,096 | $25,736 |
| 10-year return, value up 3% a year | 10.8% | 8.5% | 6.2% |
| 10-year return, value up 2.1% a year | 8.8% | 6.2% | 3.7% |
| 10-year return, value flat | 2.9% | −0.3% | −3.6% |
At $1,800 of rent you pay $25,736 into the house over ten years, and its value has to rise about 0.9% a year just to hand back what you put in. At $2,000 the loss lasts seven years, and the value has to rise 0.1% a year. At $2,200 it could fall 0.8% a year and you’d still get your money back.
A house with negative cash flow also has no cushion for the months that go worse than planned, the room that how much a rental should cash flow measures. Its losses come out of your income or savings, on top of the reserves that this $250,000 example keeps in the bank.
How do you check a negative cash flow rental before you buy?
Before buying a rental property with negative cash flow, run it through four checks.
- Find the monthly loss. Run the house in the rental calculator with every cost in. The answer’s dollar figure is its cash flow each month.
- Open the 10-year view. Save the property and open the full analysis. On the Inputs tab, under Growth assumptions, set “Hold period” to 10. The Analysis tab then shows “Return over 10 years (IRR).”
- Take the growth away. Set “Appreciation / yr” to 0 and read the return again, then set “Rent growth / yr” to 0 as well. What’s left is what the house earns if prices and rents stand still.
- Price the wait. Add up the monthly losses for as long as you expect them to last, and set that total against your savings.