How to Calculate Rental Yield: Gross Yield, Net Yield, Cap Rate, and Cash-on-Cash

What Rental Yield Measures — and Why One Number Is Not Enough

A rental property generates income in two ways: through periodic rent payments and through appreciation in value over time. Rental yield measures only the income side — the return a property produces from rent, expressed as a percentage of what was paid to acquire it.

That sounds simple, but investors use four distinct yield and return metrics, each answering a different question:

• Gross rental yield — what fraction of total acquisition cost does the annual rent represent, before any expenses?
• Net rental yield — what fraction remains after deducting operating expenses (but not the mortgage)?
• Cap rate (capitalization rate) — what would the unlevered income return be relative to the purchase price? This is the property-level metric used by appraisers and lenders.
• Cash-on-cash return — what return does the investor earn on the actual cash they wired at closing, after accounting for the mortgage payment?

Each metric has a specific use. Gross yield is a quick rough screen. Cap rate is the apples-to-apples comparison number across properties. Cash-on-cash answers the question that matters most to a leveraged investor: “What am I earning on my out-of-pocket dollars?”

The Key Distinction: NOI vs. Cash Flow

The single most common error in rental yield calculations is confusing Net Operating Income (NOI) with pre-tax cash flow. They are not the same thing, and using the wrong one in a formula produces a meaningless number.

NOI is an unlevered metric. It equals effective gross income minus all operating expenses — but explicitly excludes any debt service (mortgage principal and interest). Two investors who own the same property — one all-cash, one leveraged at 75% LTV — have identical NOIs, because the property’s operating performance is independent of how it is financed.

NOI = Effective Gross Income − Operating Expenses
    = (Gross Annual Rent − Vacancy Loss) − (Management + Maintenance + Property Tax + Insurance)

Operating expenses do NOT include mortgage payments.

Pre-tax cash flow is a levered metric. It starts with NOI and subtracts the annual debt service:

Annual Pre-Tax Cash Flow = NOI − Annual Debt Service

This is the amount the property generates for its owner after the bank is paid. It can be negative — a property with strong NOI may still produce negative cash flow if the mortgage payment is large relative to income.

NOI feeds the cap rate and net yield calculations. Pre-tax cash flow feeds the cash-on-cash return.

The Four Metrics Defined

Gross Rental Yield

Gross yield is the simplest metric — annual rent divided by total acquisition cost, expressed as a percentage. It ignores all expenses and financing, so it overstates the true return, but it is useful as a preliminary filter.

Gross Yield = (Monthly Rent × 12) / Total Acquisition Cost × 100

Total acquisition cost is purchase price plus all closing costs plus any immediate renovation or rehab costs. Using only the purchase price understates the true cost basis.

Net Rental Yield

Net yield replaces gross rent with NOI in the numerator, still using total acquisition cost as the denominator. It reflects what the property earns after operating expenses, but before financing.

Net Yield = NOI / Total Acquisition Cost × 100

Net yield is a better measure of a property’s income efficiency than gross yield, but it still does not capture the cost of debt.

Cap Rate (Capitalization Rate)

Cap rate differs from net yield in two ways: it uses only the purchase price (not total acquisition cost) as the denominator, and it is expressed as an unlevered, property-level metric. Appraisers, lenders, and commercial real estate professionals use cap rate to compare properties because it strips out buyer-specific financing and acquisition costs.

Cap Rate = NOI / Purchase Price × 100

A low cap rate indicates a higher-valued property relative to its income (common in tight urban markets). A higher cap rate suggests more income per dollar of purchase price (common in secondary and tertiary markets). The “right” cap rate depends entirely on local market conditions and the investor’s risk tolerance.

Cash-on-Cash Return

Cash-on-cash return is the metric most relevant to a leveraged investor — it measures the annual pre-tax cash flow as a fraction of the total equity invested at closing.

Cash-on-Cash Return = Annual Pre-Tax Cash Flow / Total Cash Invested × 100

Total cash invested equals the down payment plus any closing costs and rehab costs paid in cash (that is, total acquisition cost minus the loan amount). This is what the investor actually wired to close the deal.

Cash-on-cash can be negative — a common and expected outcome when a property’s NOI is insufficient to cover the debt service at current interest rates. Negative cash-on-cash is not automatically a reason to reject a property; it may be acceptable if appreciation potential is strong, if the property can be repositioned to increase rent, or if the investor is building long-term equity.

The 1% Rule: A Rough Screening Heuristic

The 1% rule is a shorthand widely used in the US residential real estate market: a property is considered a reasonable rental candidate if the monthly rent is at least 1% of the purchase price (not total acquisition cost).

1% Rule: Monthly Rent ≥ 0.01 × Purchase Price

A $250,000 property would need to rent for at least $2,500 per month to pass the 1% screen.

The rule exists as a pre-diligence filter, not a precision tool. It does not account for operating expenses, local vacancy rates, property taxes, or financing. A property that passes the 1% rule may still produce negative cash flow; a property that fails it may still be a sound investment depending on appreciation dynamics in the local market.

The rule uses purchase price only — never total acquisition cost — because it was designed as a quick listing-price screen before a buyer performs full diligence.

Worked Example

Consider a single-family rental in the US Midwest:

Acquisition:

Rental income:

Operating expenses (annual):

NOI:

NOI = EGI − Operating Expenses = $22,560 − $8,856 = $13,704

Financing (25% down, 30-year, 7.0%):

(TCI = down payment + closing costs + rehab costs = $62,500 + $5,000 + $10,000 = $77,500)

Annual Pre-Tax Cash Flow:

APTCF = NOI − ADS = $13,704 − $14,969 = −$1,265

Output metrics:

Interpretation: The property clears a respectable cap rate of 5.48%, indicating that the property-level income performance is reasonable for the market. However, the 7.0% mortgage rate pushes annual debt service above NOI, producing negative cash-on-cash of −1.63%. The investor is writing a check each year to hold this property.

This is a common outcome in a high-rate environment: a property with sound fundamentals can underperform on cash flow because the cost of debt exceeds the cap rate. The breakeven between cap rate and financing cost is sometimes called the mortgage constant — when the cap rate exceeds the mortgage constant, the leverage is positive; when it falls below, as here, the leverage is negative.

The 1% rule fails because the $2,000 rent falls below the $2,500 threshold for a $250,000 purchase price. This is consistent with the cash flow picture.

How to Use the Rental Yield Calculator

The calculator is organized around the same flow: acquisition costs → income → operating expenses → financing.

Acquisition section: Enter the purchase price, closing costs (title, escrow, loan origination fees), and any immediate renovation costs. These three inputs together form the total acquisition cost — the denominator for gross and net yield.

Income section: Enter the monthly gross rent before vacancy and specify a vacancy rate. Industry benchmarks for single-family rentals in stable US markets typically run 5–8%. The property management fee is expressed as a percentage of collected rent (after vacancy), which is the industry standard — most managers charge 8–12% of what is actually collected, not what the property would earn at full occupancy.

Operating expenses: Enter annual maintenance, property taxes, and insurance. Do not include mortgage principal or interest here — those belong in the financing section and are excluded from NOI.

Financing section: Enter the loan amount, annual interest rate, and term in years. The calculator computes the monthly payment using the standard amortization formula and annualizes it to derive the annual debt service. For an all-cash purchase, enter 0 for the loan amount — the debt service will be zero, and cash-on-cash will converge to the cap rate (since the entire acquisition cost is equity).

Disambiguating Yield Terminology

The terminology around rental yield is inconsistent across markets and sources. A few clarifications:

“Rental yield” in UK residential practice typically refers to gross yield — annual rent divided by the purchase price (not total acquisition cost). If a number called “rental yield” appears in a UK property listing, it is almost certainly gross yield using the asking price as denominator. US practitioners are more likely to use cap rate or cash-on-cash as the primary analytical metric.

“Yield” vs. “return”: Yield typically refers to income return (the current income produced by an asset relative to its cost). Return is broader and may include appreciation. A property with a low yield but strong appreciation prospects may still offer a competitive total return; the calculator measures the income side only.

Cap rate vs. cash-on-cash: These two metrics are frequently confused. Cap rate is a property-level metric that ignores financing — it answers “what does this asset earn?” Cash-on-cash is an investor-level metric that incorporates financing — it answers “what do I earn on my equity?” For an all-cash buyer, they converge. For a leveraged buyer, they diverge — sometimes dramatically, as the worked example above illustrates.

Frequently Asked Questions

What is a good rental yield? There is no universal benchmark — it depends on the local market, property type, and the investor’s cost of capital. As a rough orientation, gross yields in US residential markets commonly run 6–12%, with higher yields in smaller or secondary markets and lower yields in gateway cities. Cap rates for single-family rentals often range 4–8%. What matters most is whether the cap rate exceeds the cost of financing (the mortgage constant), and whether the cash-on-cash return meets the investor’s required hurdle rate.

Why can cash-on-cash be negative? Negative cash-on-cash means the annual debt service exceeds the NOI — the mortgage payment is more than the property earns after operating expenses. This is common when interest rates are high relative to cap rates. An investor might accept negative cash flow if they believe property values will appreciate, if the rent can be increased, or if the negative carry is temporary (for example, during a lease-up period after renovation).

Should I include the full purchase price or just my down payment when calculating yield? Gross yield, net yield, and cap rate all use the full acquisition cost — because they measure the property’s performance independent of how it is financed. Cash-on-cash uses only the equity invested (down payment + closing costs + rehab), because it measures the return on the investor’s own cash.

What is the difference between cap rate and net yield? In this calculator, both use NOI in the numerator. The difference is the denominator: net yield uses total acquisition cost (purchase price + closing + rehab), while cap rate uses only the purchase price. The two will be equal if the investor has no closing costs or rehab costs. In practice, net yield will be slightly lower than cap rate because the denominator is larger. Cap rate is the market convention for property valuation; net yield is more conservative for an individual investor’s analysis because it captures the full cost basis.

Is the 1% rule reliable? The 1% rule is a rough pre-diligence screen, not a precision tool. A property that clears the 1% screen is more likely to produce positive cash flow at typical leverage ratios, but that depends entirely on local operating expense levels, property taxes, vacancy, and prevailing interest rates. A property that fails the rule can still be a sound investment if the total return case (appreciation + income) justifies the carry cost. Treat it as a first-pass filter rather than a verdict.