There is no single return on a rental property. There are four, and each answers a different question: gross yield asks how hard the price works, net operating income and cap rate ask how the property performs before financing, cash-on-cash asks what your invested cash earns in a given year, and total return asks what the whole investment did including equity.
Below is one illustrative example, with round numbers I made up for the purpose, carried through all four. The numbers are not a market figure for any neighborhood. Replace every one with your own and the method holds.
The example we will carry through
Everything that follows uses these invented figures. Say a house is bought for $300,000 with 30 percent down, so $90,000, plus $10,000 in closing costs and make-ready work. Cash invested is $100,000. The loan is $210,000, and for the example assume the monthly principal and interest payment is $1,200, or $14,400 a year. The real payment depends on your rate and term, which I am not predicting.
Say it rents for $2,400 a month, or $28,800 a year. Annual operating costs, again illustrative:
- Property tax: $5,500
- Landlord insurance: $1,800
- Management: $2,400
- Maintenance allowance: $1,800
- Vacancy allowance: $2,400, one month
Total operating expenses: $13,900. Every one of those is a placeholder. Your tax bill is on the appraisal district notice, your insurance quote is from your agent, and a management quote is in writing before you sign.
Gross yield: the quickest, least useful number
Gross yield is annual rent divided by purchase price. In the example, $28,800 divided by $300,000 is 9.6 percent. It takes thirty seconds and it ignores every cost, which is why it is only good for a first sort: comparing two houses at a glance before looking harder at either.
Its one real use is the rent-to-price relationship. A high-priced house in a good school district with a modest rent will show a low gross yield, and that tells you immediately that the investment case leans on appreciation rather than cash flow, which is the pattern across much of Keller, Southlake and Colleyville. A lower-priced house with a strong rent shows the opposite. The way to think about that trade-off is in cash flow versus appreciation. Never buy on gross yield alone.
Net operating income and cap rate
Net operating income, or NOI, is rent minus every operating expense, before the mortgage. In the example, $28,800 minus $13,900 is $14,900. This is the property's earning power regardless of how it is financed, which makes it the number to compare across properties and the number a buyer will look at when you sell.
Cap rate is NOI divided by price: $14,900 divided by $300,000 is about 5 percent. It lets you compare a house to another house, or to a different kind of investment, without the financing muddying the picture. A higher cap rate means more income per dollar of price. It also often means more risk, older property or a less desirable location, so a cap rate is a question to ask, not an answer.
Two mistakes owners make here. They leave out the vacancy allowance because the house is currently rented, and they leave out the maintenance allowance because nothing has broken yet. Both will happen. NOI without vacancy and maintenance is a fantasy number. What vacancy really costs is in what vacancy really costs.
Cash flow and cash-on-cash return
Now subtract the mortgage. NOI of $14,900 minus annual principal and interest of $14,400 leaves $500 of cash flow for the year, which is about $40 a month. That is thin, and it is a realistic shape for a financed single-family rental in a good suburb, where price is high relative to rent.
Cash-on-cash return is cash flow divided by cash invested: $500 divided by $100,000 is 0.5 percent. This is the return on the money you actually put in, measured only by what reached your bank account. On its own it looks poor. Change one input and it moves sharply: a larger down payment lowers the mortgage and raises cash flow, a vacancy wipes the year out, a rent increase at renewal of $100 a month adds $1,200 to the numerator. Cash-on-cash is the number most sensitive to how well the property is run, which is why operations matter so much on a property like this.
If cash flow is negative, cash-on-cash is negative, and the question becomes whether the other components of return justify feeding the property. Sometimes they do. Often they do not.
Total return: adding the equity you cannot see
Cash flow is not the whole return on a financed property. Two more things happened during the year. The tenant's rent paid down loan principal, say $3,500 in year one as an illustration. And the property's value may have changed; for the example, assume it rose 3 percent, or $9,000, while noting that any given year could be flat or negative.
Total return for the year: $500 cash flow, plus $3,500 loan paydown, plus $9,000 value change, equals $13,000. Divided by $100,000 invested, that is 13 percent. The property that looked like a half-percent earner on cash-on-cash shows a very different picture on total return, and the gap is why owners with thin cash flow keep holding.
Two cautions. The equity pieces are unrealized: you only collect them at sale or refinance, after selling costs and after any tax on the gain and on depreciation, which a CPA should walk you through. And the value change is the one input you cannot control or predict, so a plan that needs it every year is a plan that will have a bad year. Loan paydown, by contrast, is steady as long as the tenant pays.
Run the example three more times
The point of a worked example is to change it. Three versions worth running on your own property:
- A two-month vacancy. Rent drops by $4,800 and a turnover make-ready adds, say, $2,000. Cash flow goes from $500 to roughly negative $6,300. One bad turnover erases years of thin cash flow, which is the whole argument for retaining good tenants.
- A $4,000 air conditioner repair. The maintenance allowance was $1,800, so cash flow is now negative $1,700 for the year. This is what the reserve is for, and the reserve logic is in how much reserve to keep per rental.
- A $100 rent increase at renewal, with the tenant staying. Cash flow rises to $1,700, cash-on-cash more than triples, and nothing else changed.
Every version shows the same thing: on a suburban single-family rental, the return is decided by vacancy, tenant quality and maintenance far more than by the headline rent.
What belongs in operating expenses, and what does not
Operating expenses are the recurring costs of running the property: tax, insurance, HOA dues, management, routine maintenance, a vacancy allowance, utilities you pay during vacancy, and any leasing or renewal fees spread over the expected tenancy. They do not include the mortgage, which is financing, or capital items like a roof, which are tracked separately as capital expenses and are what the reserve exists to fund.
Be honest with the allowances. If the house has a fifteen-year-old roof and an original water heater, the maintenance allowance should be higher than for a newer home, and a separate capital reserve should be funded. The monthly owner statement is where the actual numbers live once the property is running; the lines are explained in how to read your owner statement. Management fees belong in the expense line as written in the agreement; ours are on the pricing and fees page.
Using the numbers before you buy
Run all four measures on any property before an offer, using real quotes: the actual tax from the appraisal district, an insurance quote, a management quote in writing, a maintenance allowance based on the age of the major systems, and a rent figure from a rental analysis rather than a listing site estimate. A rent that is $200 a month too optimistic turns a positive cash-on-cash into a negative one, and nothing else in the model will warn you.
Then decide which return you are buying. If the cap rate is modest and the cash-on-cash is thin but the location, condition and tenant demand are strong, you are buying a total return play and you need a reserve and a long horizon. If the cash flow is strong and the equity story is weaker, you are buying income. Both are valid. Buying one while expecting the other is where owners regret the purchase. We help owners evaluate specific properties through buying an investment property, and a free rental analysis gives you the rent line from someone who leases in the neighborhood.
Recalculate every year, from the statements
The example is a model. After year one, your numbers are real: twelve statements with actual rent, actual repairs, actual vacancy days. Rebuild the four measures from those once a year, update the value estimate with a broker's opinion rather than an online guess, and the return on the property stops being a hope and becomes a record.
A rental that is tracked this way tells you when to raise rent, when to replace a system rather than keep repairing it, when to refinance and when to sell. One that is not tracked just sends money in and out. Nothing in this guide is financial, legal or tax advice; a CPA should confirm how depreciation, gains and your own situation affect the after-tax picture.
The takeaway: Compute all four returns, keep the allowances honest, and rebuild the numbers from real statements each year, because a rental's return is decided by how it is run far more than by the rent it was listed at.
Questions owners ask
What is a good ROI on a rental property?
It depends on which measure and on what you are comparing it to. Cap rate compares properties before financing, cash-on-cash shows what your invested cash earned in a given year, and total return adds loan paydown and value change. A suburban single-family rental often shows a modest cap rate and thin cash-on-cash with most of the return in equity. Judge it against your own horizon, not a universal target.
What is the difference between cap rate and cash-on-cash return?
Cap rate is net operating income divided by the property price, before any mortgage, and it describes the property itself. Cash-on-cash is annual cash flow after the mortgage divided by the cash you invested, and it describes your deal. Two buyers of the same house with different down payments get the same cap rate and different cash-on-cash returns.
Should the mortgage be included when calculating rental return?
Not in net operating income or cap rate, which are meant to be financing-neutral. Yes in cash flow and cash-on-cash, which measure what you actually receive. Total return also credits the principal portion of each payment as loan paydown, since the tenant's rent is building your equity.
How do I account for vacancy and repairs in a rental ROI calculation?
Include an allowance for both in operating expenses even if the house is rented and nothing is broken. A common approach is to set aside roughly one month of rent for vacancy and a maintenance allowance based on the age of the major systems. Leaving them out produces a return that looks better than any real year will.
Does property management reduce rental ROI?
The fee is an operating expense, so it lowers net operating income on paper. Whether the real return goes down depends on what the fee prevents: vacancy days, bad tenants, missed renewals and overpriced repairs each cost more than a month of fees. Compare the fee to your own last two years of those costs.
How do I work out whether the rent will cover my mortgage, taxes, insurance, and management?
Start from a conservative annual rent based on leased comparables, not a listing-site estimate, and subtract the operating expenses: property tax at the non-homestead rate, a landlord insurance quote, HOA dues, a management quote in writing, a maintenance allowance based on the age of the major systems, and a vacancy allowance of about one month. That gives net operating income. Then subtract the annual mortgage principal and interest; what remains is your cash flow, and dividing it by the cash you invested gives cash-on-cash return. Run it again with a two-month vacancy and a large repair to see how thin the margin is. Perpetual's free rental analysis supplies the rent.
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