Rental Property ROI: How to Calculate Returns

How we build this guide: This page explains standard real-estate return formulas (gross yield, NOI, cap rate, cash-on-cash return) and provides a calculator for applying them to your own numbers. It is general educational information, not personalized financial, tax, or legal advice, and this site does not receive compensation tied to any figure presented here.

Figures and formulas verified: September 2026. All dollar amounts in the worked example and scenario table are hypothetical and illustrative — run your own property's actual numbers through the calculator below rather than treating any example figure as a benchmark.

Return on investment, in the simplest sense, measures how much a property earns relative to how much money is tied up in it. But "ROI" gets used loosely in real estate, and two landlords can both say "my ROI is 8%" while measuring completely different things.

The result depends heavily on what's included in the calculation:

• Cash flow — is the year's actual cash income counted, or only a snapshot month?

• Financing — is the return measured against the full purchase price, or just the cash actually invested (down payment, closing costs, repairs)?

• Appreciation — is unrealized market value growth included, or only cash that's actually been collected?

• Principal paydown — is the equity built through mortgage payments counted as part of the return?

• Acquisition and selling costs — are closing costs, initial repairs, and eventual selling costs factored in, or ignored?

• Taxes — is the figure pre-tax or does it account for depreciation and other tax effects?

None of these choices is "wrong" — they're just answering different questions. That's why this guide covers several metrics side by side instead of promoting one universal formula. Once you know what each one measures, you can pick the right one for the decision in front of you, whether that's comparing two properties, checking a deal before you buy, or reviewing how a property you already own is performing.

ROI and cash flow are related but not the same thing, and it's worth being precise about the difference before going further.

Cash flow is a dollar figure: the actual money left in your account each month after every real cost — vacancy, operating expenses, debt service, and reserves — has been subtracted. ROI, by contrast, is usually expressed as a percentage: it puts that cash flow (or another return figure) in context by comparing it to how much money is invested in the property.

In other words, cash flow tells you the size of the return in dollars; ROI tells you how efficient that return is relative to your investment. A $500/month cash-flow property with $20,000 invested is producing a very different return than a $500/month property with $150,000 invested, even though the cash flow figure is identical. For the full step-by-step formula behind that monthly cash number — including vacancy, NOI, debt service, and reserves — see how to calculate rental property cash flow. This guide picks up from there and focuses on what that cash flow (and a few other figures) means once you turn it into a return percentage.

Six figures come up most often when landlords talk about rental returns. Each one is legitimate; each one measures something slightly different.

Formula: Gross Rental Yield = (Annual Rental Income ÷ Property Value) × 100

The simplest return figure and the easiest to calculate — and also the least complete, since it ignores expenses, vacancy, and financing entirely. It's useful as a fast first-pass filter when comparing several properties, but not as a final decision-making number.

Formula: Net Rental Yield = (Annual Rental Income − Annual Operating Expenses) ÷ Property Value × 100

A step more realistic than gross yield because it subtracts operating costs, but it still ignores financing. This is essentially the same idea as cap rate, expressed against purchase price or current value rather than a fixed convention.

Formula: NOI = Effective Rental Income − Operating Expenses

A dollar figure, not a percentage — but it's the foundation that cap rate and several other metrics are built on. NOI deliberately excludes financing, which is what makes it useful for comparing properties bought with different loans or with cash. For the full breakdown of what belongs in effective income and operating expenses, see rental property expenses.

Formula: Cap Rate = (NOI ÷ Purchase Price or Current Market Value) × 100

Cap rate measures how a property performs on its own, independent of how it's financed. Two investors buying the identical property — one with cash, one with a large mortgage — will calculate the same cap rate, because financing never enters the formula. That makes cap rate useful for comparing properties, but not for answering "what will I personally earn on the cash I put in," which is where cash-on-cash return comes in.

Formula: Cash-on-Cash Return = (Annual Cash Flow ÷ Total Cash Invested) × 100 Unlike cap rate, cash-on-cash return accounts for financing — it measures the return on the actual cash you put in (down payment, closing costs, initial repairs), not the full purchase price.

Formula (illustrative): Total ROI = (Annual Cash Flow + Principal Paydown + Appreciation) ÷ Total Cash Invested × 100 The broadest figure, since it adds equity growth from paying down the loan and, optionally, market appreciation on top of cash flow. It's also the most speculative, since appreciation isn't guaranteed.

Whichever metric you're ultimately after, the underlying inputs are the same. Work through them in this order:

1. Purchase price — the amount paid for the property.

2. Closing/acquisition costs — loan origination fees, title, inspection, attorney fees, and similar one-time costs of buying.

3. Initial repairs or improvements — any work done before the property is rent-ready, separate from ongoing maintenance.

4. Rental income — gross scheduled rent, plus any other income (pet rent, parking, laundry).

5. Vacancy/collection loss — the realistic percentage of income you won't actually collect.

6. Operating expenses — taxes, insurance, maintenance, management, and the smaller recurring costs covered in rental property expenses.

7. NOI — effective income minus operating expenses.

8. Financing/debt service — the annual mortgage payment, if the property is financed.

9. Annual cash flow — NOI minus debt service (and any reserve you set aside).

10. Initial cash invested — down payment, closing costs, and initial repairs combined.

11. Appreciation/equity, where relevant — market value change and principal paid down over the holding period.

12. Total return — cash flow plus, optionally, principal paydown and appreciation, measured against cash invested.

Once you have those twelve inputs, every metric above is a matter of plugging numbers into the formulas — which is exactly what the calculator further down this page does automatically.

These three get confused most often, so it's worth stating the distinction plainly. Gross yield ignores expenses entirely. Cap rate accounts for operating expenses but ignores financing. Cash-on-cash return accounts for both operating expenses and financing, but measures against the cash invested rather than the full purchase price.

A practical consequence: a highly leveraged property (small down payment, large mortgage) can show a strong cash-on-cash return even with a modest cap rate, because the return is being measured against a small cash base. The reverse is also true — a property bought with cash has no debt service to subtract, so its cap rate and cash-on-cash return end up identical. Neither situation makes one property automatically "better"; leverage changes the answer to one metric but not the other.

Operating expenses feed directly into NOI, cap rate, and every return metric downstream of it, so getting this list right matters — but this page won't re-list every category in full, since it's already covered in depth on rental property expenses. In short: property taxes, insurance, maintenance, management fees, and similar recurring costs count as operating expenses. Mortgage principal and interest do not — debt service is tracked as its own separate line in every formula above, which is exactly why cap rate (before debt service) and cash-on-cash return (after debt service) can tell such different stories about the same property.

Leverage — using borrowed money to buy the property — is one of the biggest reasons two landlords can look at the same property and calculate very different returns.

A larger down payment means less debt service, which generally improves cash flow and cash-on-cash return in dollar terms, but it also means more cash tied up, which can lower the cash-on-cash percentage even as the dollar amount of cash flow goes up. A smaller down payment does the opposite: more debt service reduces cash flow, but the smaller cash base can produce a higher cash-on-cash percentage — assuming the property still cash-flows positively after the larger mortgage payment.

Cap rate sidesteps this entirely, since it's calculated before debt service, which is exactly why comparing cap rate across properties with different financing structures is more apples-to-apples than comparing cash-on-cash return the same way. Neither metric is more "correct" — they answer different questions, and a landlord evaluating financing options benefits from checking both.

Vacancy reduces effective income before any return metric is calculated, so its effect compounds through every formula downstream. Consider a property with $2,000/month scheduled rent: at 5% vacancy, effective income drops to roughly $1,900/month; at 10% vacancy, it drops to about $1,800/month. That $1,200 annual swing flows straight through NOI, cap rate, and cash-on-cash return. Using a realistic, market-informed vacancy figure rather than an optimistic one keeps every return calculation that follows from being overstated.

Routine maintenance is already baked into operating expenses and therefore into NOI, cap rate, and cash-on-cash return. Large, infrequent capital items — a roof, an HVAC system, a water heater — are different: they don't show up in a monthly operating budget, but they're a real, eventual cost that affects total return over a holding period. A property that shows a strong cash-on-cash return for three straight years and then absorbs a $10,000 roof replacement in year four didn't actually earn that return evenly. Reserving monthly for these items, as covered in the rental property maintenance checklist, keeps return figures from being flattered by costs that simply haven't come due yet.

The calculator below takes the twelve inputs from the step-by-step section above and returns every major metric at once — gross yield, cap rate, cash-on-cash return, and an optional total-return estimate — without you having to run each formula by hand. Enter your own numbers (or start from the pre-filled example) and click Calculate. Every result is only as accurate as the assumptions you enter, and nothing here should be read as a recommendation to buy or avoid any specific property.

The following walks through the calculator's default example step by step. Every figure is illustrative only, built from one hypothetical property — not a benchmark for what any real rental will produce.

A landlord buys a single-family rental for $220,000 with a 25% down payment ($55,000), $4,500 in closing costs, and $3,500 in initial repairs — a total of $63,000 in cash invested. The unit rents for $1,950/month plus $25/month in pet rent, with a 6% vacancy allowance. Annual operating expenses (taxes, insurance, maintenance, a 9% management fee, and other small recurring costs) total roughly $7,710. The property is financed at 7% over 30 years.

Notice how differently the three return figures read on the exact same property: a 10.6% gross yield looks strong before any costs are subtracted, a 6.6% cap rate reflects the property's operating performance on its own, and a 2.2% cash-on-cash return reflects how thin the margin is once the actual mortgage payment on a 25%-down loan is subtracted from a fairly modest NOI. None of the three figures is "the" ROI — together, they show why a landlord who checks only one number can walk away with a misleading impression of the same deal.

None of the following guarantees a specific outcome — every property's ceiling depends on its market, condition, and financing. These are simply the legitimate levers available to most landlords:

• Reduce avoidable expenses by reviewing recurring costs periodically — see rental property expenses for the full category list.

• Reduce vacancy through accurate, market-based pricing — see how to price a rental property.

• Improve tenant retention, since a renewing tenant avoids both a vacancy period and turnover costs.

• Review market rent at renewal rather than leaving rent unchanged indefinitely.

• Stay ahead of preventative maintenance — see the maintenance checklist.

• Evaluate management costs periodically — see how to manage a rental property.

• Review insurance coverage and pricing rather than auto-renewing the same policy — see rental property insurance.

• Keep clean, accurate records so every ROI calculation is based on real numbers — see rental property bookkeeping.

The table below applies three different sets of assumptions to the same $220,000 property from the worked example, holding purchase price and financing constant while varying rent, vacancy, and operating expenses.

Notice that a relatively modest shift in rent, vacancy, and expenses — nothing dramatic — moves cash-on-cash return from negative to over 6% on the identical property with identical financing. This is exactly why running a range of assumptions, rather than a single optimistic estimate, gives a far more honest picture than any one number in isolation.

This page is general educational information for landlords, not personalized financial, investment, tax, accounting, or legal advice. Market conditions, financing terms, operating costs, and tax treatment vary by property, location, and jurisdiction, and they change over time. Every dollar figure and percentage in this guide — including the calculator's default values — is a simplified, illustrative example, not a projection or guarantee of return for any real property. Confirm figures specific to your own situation with a qualified accountant, lender, or property professional, and confirm any tax treatment directly through IRS Publication 527 or a qualified tax preparer. Tax rules referenced here apply to U.S. property owners; landlords outside the United States should confirm equivalent rules in their own jurisdiction.

For the other pieces of the picture, see rental property cash flow, rental property expenses, rental property bookkeeping, rental property tax deductions, and how to price a rental property.

Editorial note: This analysis explains standard, publicly documented real-estate return formulas; it does not represent or recommend any specific investment, and this site does not receive compensation tied to any figure presented on this page.