Here's how you calculate real ROI and cash-on-cash return on an Airbnb: start with gross revenue (ADR × occupancy × 365), subtract every operating cost — platform fees, cleaning, management, maintenance, reserves, taxes, insurance — to get net operating income (NOI), subtract annual debt service to get pre-tax cash flow, then divide that cash flow by the total cash you put into the deal. That last number is your cash-on-cash return, and it's the one an honest airbnb roi calculator should hand you. Most don't.
Most of the free tools online stop at gross. They multiply an average nightly rate by an occupancy estimate, gross it up over a year, and print a big green number. Rabbu, one of the most-cited estimators, states plainly that its projections are gross revenue — before cleaning fees, platform fees, and management. That's not a return. That's a top-line figure that has nothing to do with what lands in your account.
I run these numbers on real deals every week, and the gap between gross and net is where most "good" Airbnb investments quietly turn into break-even landlording. Below, I'll walk the full chain — gross to NOI to cash-on-cash to cap rate — with one worked example where two properties post identical gross revenue and opposite returns. Furnishing and financing are the two lines that do the damage, and neither shows up on the calculator that got you excited.
Why gross revenue is a vanity metric
Gross revenue tells you how busy your property is, not whether it makes money. ADR × occupancy × 365 is the industry-standard way to project top-line short-term rental income, and it's useful for one thing: sizing the market. If comparable listings in your zip code run a $220 average daily rate at 62% occupancy, that's roughly $49,800 in gross — a real signal that demand exists.
It's also where the honest part ends. Airbnb charges the host a service fee of around 3% on most reservations. Cleaning runs per turnover and scales with how often you book. Property management for short-term rentals commonly lands between 10% and 25% of revenue — a wide band that alone can swing your return by double digits. Add utilities, internet, supplies, insurance, property taxes, permits, and software, and a property grossing $49,800 might net operating income of $28,000 before you've made a single mortgage payment.
When a tool page shows you gross and calls it ROI, it's skipping every one of those lines. That's not a calculation error — it's a category error. Gross is a market signal. Net is the investment. If you're comparing an airbnb calculator to underwrite a short-term rental, the first question to ask any tool is: does this number come out before or after operating costs? If it can't tell you, it's a vanity metric.
The three return metrics that actually matter
Cash-on-cash return, cap rate, and DSCR answer three different questions, and you need all three before you wire a deposit. They get used interchangeably in Airbnb Facebook groups, which is how people end up buying the wrong deal.
Cash-on-cash return is annual pre-tax cash flow divided by total cash invested. It answers: what return am I earning on the money I actually put in? If you invested $95,000 (down payment, closing costs, furnishing) and the property throws off $14,250 in cash after debt service, that's a 15% cash-on-cash return. This is the number that matters most to a leveraged buyer, because it reflects your real out-of-pocket outcome — financing included.
Cap rate is NOI divided by property value (or purchase price). It ignores your mortgage entirely, which makes it the clean way to compare two properties as assets, independent of how each one is financed. A property with $28,000 NOI on a $400,000 purchase price is a 7% cap rate. If you want the full breakdown of what counts as a good cap rate for short-term rentals, that's a separate teardown — but the formula is that simple, and the discipline is refusing to confuse it with cash-on-cash.
DSCR — debt-service coverage ratio — is NOI divided by annual debt service. It answers the lender's question: does the property's income cover the loan? Lenders on short-term rental loans commonly want a DSCR of at least 1.20, meaning NOI is 20% larger than the annual mortgage payment. At $28,000 NOI against $22,000 in annual debt service, DSCR is 1.27 — approvable. Drop NOI to $24,000 and DSCR falls to 1.09, and the same lender walks. If you're weighing how to finance a short-term rental, DSCR is the metric the underwriter is staring at, so you should be too.
The furnishing and setup line nobody budgets
Furnishing an Airbnb is a capital expense that lands before your first booking, and leaving it out of "total cash invested" inflates every return you calculate. This is the single most common omission I see in underwriting spreadsheets.
FF&E — furniture, fixtures, and equipment — is what turns a bought house into a rentable short-term rental. Beds, sofas, dining sets, a fully stocked kitchen, linens, towels, TVs, patio furniture, décor, smart locks, and the small-stuff avalanche (can openers, extra sheets, coffee makers, first-aid kits) that separates a 4.6 listing from a 4.9. For a mid-size two-to-three-bedroom unit, a realistic furnishing budget runs $15,000 to $30,000 depending on how you finish it — and that number belongs in your denominator, not in a footnote.
Here's why it wrecks the calculators: cash-on-cash return is cash flow ÷ total cash invested. If a tool assumes total cash invested is just your down payment plus closing costs, and you actually spent $22,000 furnishing the place, your real denominator is $22,000 bigger. That drags a "20% cash-on-cash" deal down to something closer to 15% or 16%. Same cash flow, more capital in, lower return. No calculator that skips FF&E can get this right, because it never asked what you spent to make the property bookable in the first place.
Worked example: two identical-revenue deals, opposite returns
Two properties can post the same gross revenue and hand you completely different returns once furnishing and financing hit the math. Here's an illustrative side-by-side. Numbers are illustrative for teaching the mechanics — run your own market's comps before you underwrite.
Both properties gross $60,000 a year (say, $274 ADR × 60% occupancy × 365, rounded). Both. Same top-line number a basic calculator would celebrate.
Property A — clean deal, modest furnishing
Gross revenue: $60,000
Platform fee (~3%): −$1,800
Cleaning (passed partially to guests, net cost): −$4,000
Management (12%): −$7,200
Utilities, internet, supplies, insurance, taxes: −$11,000
Reserves (5% for capex/vacancy): −$3,000
NOI: $33,000
Annual debt service (loan on $360K purchase): −$21,000
Pre-tax cash flow: $12,000
Total cash invested: $72,000 down + $10,000 closing + $18,000 furnishing = $100,000
Cash-on-cash: $12,000 ÷ $100,000 = 12.0%
Cap rate: $33,000 ÷ $360,000 = 9.2% | DSCR: $33,000 ÷ $21,000 = 1.57
Property B — same gross, heavier costs
Gross revenue: $60,000
Platform fee (~3%): −$1,800
Cleaning: −$5,500 (more turnovers, shorter stays)
Management (22%): −$13,200
Utilities, internet, supplies, insurance, taxes: −$13,500 (larger unit, higher tax bill)
Reserves (5%): −$3,000
NOI: $23,000
Annual debt service (loan on $470K purchase): −$27,400
Pre-tax cash flow: −$4,400
Total cash invested: $94,000 down + $13,000 closing + $29,000 furnishing = $136,000
Cash-on-cash: −$4,400 ÷ $136,000 = −3.2%
Cap rate: $23,000 ÷ $470,000 = 4.9% | DSCR: $23,000 ÷ $27,400 = 0.84
Same $60,000 gross. Property A returns 12% on your cash. Property B loses money every month and wouldn't clear a 1.20 DSCR — no lender funds it without a bigger down payment. The differences that flipped the outcome: a 10-point management spread, a bigger purchase price carrying more debt, and $11,000 more furnishing capital sitting in the denominator. A gross-only calculator shows these two deals as twins. The net teardown shows one is a business and the other is a slow bleed.
Your break-even occupancy
Before you buy, find the occupancy rate where cash flow hits zero — that's the number that tells you how much cushion the deal has. It reframes the whole question from "how good can this get?" to "how bad can it get before I'm feeding it?"
Break-even occupancy is the occupancy percentage at which gross revenue exactly covers all operating costs plus debt service. Take your total annual costs (operating + debt service), divide by your projected annual gross at 100% occupancy, and you get the occupancy floor. Using Property A's economics: total costs are roughly $48,000 (operating) plus $21,000 (debt) = $69,000; gross at full occupancy would be about $100,000 ($274 × 365). Break-even lands near 69% — meaning if the market softens and you slip below that, the property stops paying for itself.
Run this before you're emotionally attached to a listing. If break-even occupancy is 55%, you have room for a bad season. If it's 78% and the market's realistic occupancy is 62%, the deal only works in a fantasy. The calculators that quote gross never surface this number, because break-even depends entirely on the cost side they left out.
Frequently asked questions
What is a good ROI for an Airbnb?
For a leveraged short-term rental, many operators target a cash-on-cash return in the 10% to 15% range, though what qualifies as "good" depends on your market, risk tolerance, and how much appreciation you expect on top of cash flow. Anything at or below break-even means you're betting entirely on appreciation and self-managing your way to sweat equity. The key is to measure ROI on net pre-tax cash flow against total cash invested — including furnishing — not on gross revenue.
What is cash-on-cash return?
Cash-on-cash return is your annual pre-tax cash flow divided by the total cash you invested in the deal. Total cash invested means down payment plus closing costs plus furnishing and setup — every dollar out of your pocket, not just the down payment. It's the truest measure of what a leveraged Airbnb is actually earning you, because it accounts for both your financing and your real capital outlay.
How much should I budget to furnish an Airbnb?
A realistic FF&E budget for a two-to-three-bedroom short-term rental runs roughly $15,000 to $30,000, covering furniture, a fully stocked kitchen, linens, electronics, smart locks, and décor. Bigger or higher-end properties push past $30,000. Whatever the figure, put it in your "total cash invested" line — leaving furnishing out of the denominator is the fastest way to overstate your cash-on-cash return.
Want a real answer instead of a green gross number? Run the diagnostic and we'll underwrite your specific deal — gross to NOI to cash-on-cash — so you know what it actually returns before you wire a dollar.
Sources
Airbnb host service fee methodology (~3% on most reservations) — Airbnb Help Center
Rabbu revenue estimator methodology statement (figures are gross revenue, excluding cleaning, platform fees, and management) — Rabbu
Short-term rental property management fee range (10%–25% of revenue) — industry management benchmarks
Cash-on-cash return and cap rate definitions — standard real estate underwriting
DSCR lender threshold (commonly ≥1.20 for short-term rental loans) — DSCR loan underwriting guidelines
Written by the CashFlow Diary team — operators who underwrite and run short-term rentals.
