Short-Term vs Long-Term Rental ROI: The Calculation Most Landlords Get Wrong

Why the Standard Comparison Breaks Down

Most investors place a short-term rental (STR) nightly rate next to a long-term rental (LTR) monthly figure and pick the larger number. That comparison is structurally flawed. It mixes gross revenue with gross revenue while ignoring the cost structures that make those two numbers incomparable.

A $2,400/month long-term lease generates $28,800 in gross annual income. A $200/night STR at 65% occupancy generates $47,450. The STR looks like a 64.8% premium. But once you subtract the STR's platform fees, cleaning costs, furnishing depreciation, utilities, and higher insurance, that premium frequently collapses below $6,000. Sometimes it disappears entirely.

The correct framework compares net operating income (NOI) against total capital deployed. Everything else is noise.

The Core Metrics You Need

Before running any comparison, define these four figures for each strategy:

Gross Scheduled Income (GSI): The theoretical maximum revenue if the property were occupied 100% of the time at your target rate.

Effective Gross Income (EGI): GSI minus vacancy losses and collection losses. This is the number that actually lands in your account.

Net Operating Income (NOI): EGI minus all operating expenses, excluding debt service. This measures the property's earning power independent of financing.

Cash-on-Cash Return (CoC): Annual pre-tax cash flow divided by total cash invested. This is the metric that tells you what your actual capital is earning.

Run both strategies through all four filters. Only then can you compare them honestly.

Worked Example 1: The $380,000 Single-Family Home

Consider a 3-bedroom property purchased for $380,000. The buyer puts 25% down ($95,000) and finances $285,000 at 7.1% over 30 years. Monthly principal and interest: $1,912. Annual debt service: $22,944.

Long-Term Rental Scenario

Market rent for the property: $2,600/month. Vacancy rate in the submarket: 6.5%.

• GSI: $31,200
• Vacancy loss (6.5%): $2,028
• EGI: $29,172
• Operating expenses (property management at 8%, insurance, taxes, maintenance, reserves): $9,840
• NOI: $19,332
• Annual debt service: $22,944
• Annual cash flow: $19,332 minus $22,944 = negative $3,612

Cash-on-cash return: negative 3.8% on $95,000 invested.

That is a negative cash flow property under long-term rental, but it may still build equity and appreciate. The investor needs to know whether they are holding for cash flow or total return.

Short-Term Rental Scenario

Same property, furnished and listed on Airbnb and Vrbo. Nightly rate: $195. Submarket occupancy rate: 61%.

• GSI: $71,175 (365 nights at $195)
• Vacancy-adjusted revenue: $71,175 multiplied by 0.61 = $43,417
• Platform fees (combined Airbnb/Vrbo at 3% host fee): $1,302
• Cleaning fees collected from guests offset cleaning costs, assumed net neutral
• Operating expenses: property management (20% of revenue for STR), utilities ($3,600/year), furnishing depreciation ($2,400/year), insurance premium increase ($900/year), supplies and maintenance ($2,100/year): total $17,683
• EGI after platform fees: $42,115
• NOI: $42,115 minus $17,683 = $24,432
• Annual debt service: $22,944
• Annual cash flow: $1,488

Cash-on-cash return: 1.57% on $95,000 invested.

The STR generates positive cash flow where the LTR does not. But 1.57% is not a compelling return on $95,000 of capital. A 6-month Treasury bill pays more with zero management burden.

This example does not make STR the winner. It illustrates that the correct question is: does either strategy meet your minimum required return given the risk and effort involved?

Worked Example 2: The $620,000 Vacation Market Condo

Now consider a property in a high-demand vacation corridor. Purchase price: $620,000. Down payment: 25% ($155,000). Loan: $465,000 at 7.1%. Monthly payment: $3,122. Annual debt service: $37,464.

HOA fees apply: $6,000/year. Some HOAs prohibit STR entirely. Confirm before purchase.

Long-Term Rental Scenario

Local market rent: $3,100/month. Vacancy: 7.2%.

• GSI: $37,200
• Vacancy loss: $2,678
• EGI: $34,522
• Operating expenses (management 8%, taxes, insurance, HOA, maintenance): $16,200
• NOI: $18,322
• Annual cash flow: $18,322 minus $37,464 = negative $19,142

Cash-on-cash return: negative 12.3%. This property does not pencil as a long-term rental at current rates and price.

Short-Term Rental Scenario

Nightly rate: $285. Vacation market occupancy: 72%.

• GSI: $104,025
• Vacancy-adjusted revenue: $74,898
• Platform fees (3%): $2,247
• Operating expenses (STR management 22%, utilities $5,400, furnishing depreciation $3,600, insurance add-on $1,400, supplies $2,800, HOA $6,000): $36,597
• EGI after platform fees: $72,651
• NOI: $72,651 minus $36,597 = $36,054
• Annual cash flow: $36,054 minus $37,464 = negative $1,410

Cash-on-cash return: negative 0.9%. Nearly breakeven, with equity accumulation and potential appreciation on a $620,000 asset.

At this price point and in this market type, STR is the only strategy that makes the property remotely viable as an income asset. But it requires active management, seasonal pricing discipline, and consistent 70%+ occupancy to stay out of negative cash flow.

The Expense Categories Investors Consistently Undercount

Short-term rental expense estimates tend to run 15% to 22% low because investors miss or minimize four specific cost centers.

Furnishing replacement cycles. A fully furnished STR requires full refurnishment every four to six years on average. On a $18,000 initial furnishing cost, that is $3,000 to $4,500 in annualized depreciation. Most spreadsheets show zero.

Occupancy-linked cleaning costs. At 65% occupancy on a weekly-turnover property, you absorb roughly 34 professional cleans per year at $120 to $180 each. That is $4,080 to $6,120 annually. Even when guests pay a cleaning fee, the fee rarely covers the full cost in higher-end markets.

Utility scaling. STR utility bills run 40% to 70% higher than owner-occupied equivalents. Guests do not conserve. Budget $3,200 to $5,500 annually for a standard 3-bedroom, depending on climate and guest behavior.

Platform algorithm risk. Airbnb and Vrbo adjust search ranking algorithms periodically. New supply in your submarket directly compresses your occupancy rate. A 10-percentage-point drop in occupancy on a $75,000 GSI property costs $7,500 in gross revenue before any expense offset.

How to Pick the Right Strategy for Your Property

The decision comes down to three variables: submarket demand depth, your effective tax rate, and your management bandwidth.

Submarket demand depth. Check AirDNA or Rabbu for your specific zip code. You need a submarket occupancy rate above 62% to make STR math work at typical expense ratios. Below that threshold, LTR almost always produces superior risk-adjusted returns.

Tax treatment. STR income taxed as active income at your marginal rate erodes returns significantly more than LTR income qualifying for passive activity rules. At a 32% marginal rate, a $24,000 STR net income yields $16,320 after federal tax. That same $24,000 from a LTR, offset with depreciation and passive losses, can reduce your effective tax rate on that income substantially.

Management bandwidth. Self-managing an STR consumes 8 to 12 hours per week for a moderately active listing. Hiring professional STR management costs 18% to 25% of gross revenue. That cost changes the NOI calculation materially, as shown in the examples above.

Build the Comparison Before You Buy

The comparison should happen during due diligence, not after closing. Pull three data points from the submarket: realized average daily rate (not listed rate), trailing 12-month occupancy rate, and the number of active competing listings. These three numbers set your revenue ceiling.

Then model both strategies against the same debt service using your actual financing terms. The property that produces a higher NOI relative to your total cash invested wins. Do not let gross revenue comparisons override that calculation.

Run Your Numbers with CalcMoney

Both worked examples above started with the financing terms. The mortgage payment determines the cash flow hurdle the property must clear. A difference of 0.5 percentage points on a $400,000 loan changes your annual debt service by $1,344. That single variable shifts the breakeven occupancy rate on an STR by roughly 4 percentage points.

Use the CalcMoney Mortgage Calculator to establish your exact debt service figure before modeling either rental strategy. Input your loan amount, rate, and term. Get the precise monthly payment. Then run both NOI scenarios against that anchor number.

The analysis is only as accurate as the financing inputs underneath it. Get those right first.

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