Cash-on-Cash Return for STR Investors: What It Is and How to Use It

Cash-on-cash return measures annual pre-tax cash flow against total cash invested. Learn the formula, a full calculation example, what good looks like in 2025, and how arbitrage changes the math.

Cash-on-Cash Return: The Investor Metric That Accounts for Financing

Cash-on-cash return (CoC) measures how much pre-tax cash income an investment property produces relative to the actual cash you put in to acquire and set it up. Unlike cap rate, which evaluates a property independent of financing, CoC reflects what your dollars are actually doing once debt service enters the picture.

The formula:

CoC Return = Annual Pre-Tax Net Cash Flow / Total Cash Invested

Both components require precision. Annual pre-tax net cash flow is what remains after operating expenses and mortgage payments. Total cash invested includes everything you wrote a check for to get the property producing revenue.

What Goes Into Total Cash Invested

Investors frequently undercount total cash invested by forgetting costs that come before the first booking. For an STR acquisition, total cash invested typically includes:

• Down payment: typically 20-25% for investment properties
• Closing costs: lender fees, title, transfer taxes, attorney fees
• Furnishing and interior setup costs
• Initial supplies and consumables stocking
• Any pre-opening repairs or upgrades required
• Permit or licensing fees paid upfront
• Photography and listing setup costs

Skipping the furnishing and setup line is the most common error. A property requiring $15,000 to furnish changes the CoC calculation meaningfully compared to one that was already turnkey.

Full CoC Calculation Example: Purchase Scenario

A $320,000 purchase with NOI of $15,600 per year.

Total cash invested:

• Down payment at 20%: $64,000
• Closing costs: $4,800
• Furnishing and setup: $15,000
• Total Cash Invested: $83,800

Annual debt service on the $256,000 loan at 7% over 30 years: approximately $20,400 per year.

Annual Net Cash Flow = NOI - Annual Debt Service = $15,600 - $20,400 = -$4,800

Cash-on-cash return: -$4,800 / $83,800 = -5.7%. This property has negative cash flow at a 7% mortgage rate with NOI of $15,600. The investor is building equity through principal paydown and potentially benefiting from appreciation, but the property demands cash from the operator each month rather than producing it. This is a common reality in markets where purchase prices are high relative to rental income potential.

When the Math Changes: Higher NOI Scenarios

If the same property produces $22,000 NOI (a more optimized operator with lower vacancy, better pricing, and tighter expense management):

Net Cash Flow = $22,000 - $20,400 = $1,600

CoC Return = $1,600 / $83,800 = 1.9%. Still low, but positive. Increase NOI further to $28,000 and net cash flow becomes $7,600, pushing CoC to 9.1%, which is where STR investment starts to look compelling against alternatives.

The sensitivity of CoC to small changes in NOI is exactly why operating efficiency matters so much in the current rate environment. A 10% improvement in operating income at this property means the difference between a negative-cash-flow asset and one yielding 5-6% on invested capital.

CoC is the metric that tells you whether your actual dollars deployed are working hard enough to justify the risk and effort of running an STR.

What Counts as a Good Cash-on-Cash Return for STR in 2025

• Below 5%: marginal. Cash flow is thin and does not leave room for unexpected expenses.
• 6-12%: healthy range. Achievable in mid-tier vacation markets, emerging destinations, or well-optimized urban properties.
• Above 12%: strong. Usually indicates a below-market purchase price or exceptional market performance.
• Above 15%: exceptional. Rare in standard purchase scenarios at 2024-2025 interest rates, but common in arbitrage and lease structures.

How Leverage Affects Cash-on-Cash Return

More debt means a smaller down payment, which reduces the denominator (total cash invested) and can push CoC higher, assuming the property cash flows at all. Less debt means a larger down payment, lower monthly debt payments, and often positive cash flow, but CoC may appear lower because so much capital is sitting in the property.

Example: the same $320,000 property purchased with 30% down ($96,000 down payment, $224,000 loan) has lower debt service (approximately $17,900/year at 7%) but more cash in the deal. With $22,000 NOI: net cash flow = $4,100, total invested = $115,800, CoC = 3.5%. The higher down payment improves cash flow but lowers CoC because more capital is deployed.

Arbitrage and Lease Deals: Where CoC Gets Interesting

Rental arbitrage, where an operator leases a property long-term and sublists it on Airbnb and VRBO, changes the CoC math dramatically because there is no down payment. Total cash invested in a lease deal typically consists of:

• Security deposit: typically one to two months rent
• First and last months rent if required
• Furnishing and setup costs
• Any landlord-required permits or insurance

On a property leased for $2,200/month, total upfront capital might be $4,400 deposit, $2,200 first month, $18,000 furnishing, $2,000 setup, totaling approximately $26,600.

If that property generates $5,800 gross STR revenue per month and operating costs (cleaning, supplies, maintenance, insurance, pricing tools) total $1,100, the net cash flow before rent is $4,700. After $2,200 monthly rent, net cash flow is $2,500/month or $30,000/year.

CoC = $30,000 / $26,600 = 112.8%

This is why arbitrage attracts operators who want high returns on deployed capital. The risks are different: lease liability, landlord restrictions, market shifts that can trap you in an underperforming lease. But the cash-on-cash math is dramatically more favorable than a leveraged purchase.

Using MagicBnB to Model CoC Before You Commit

The MagicBnB Deal Analyzer calculates CoC automatically for both purchase and lease/arbitrage scenarios. You input the purchase price, down payment, estimated mortgage terms, furnishing budget, and projected revenue range. The tool runs conservative and optimistic projections and shows CoC, NOI, and net cash flow side by side. Milo, the AI analyst, generates a written narrative explaining what the numbers mean and where the risk sits, so you can walk into any acquisition conversation with a clear financial picture.

Frequently Asked Questions

What is a good cash-on-cash return for a short-term rental?

For STR investments in 2025, a CoC return of 6-12% is a healthy target range. Below 5% is marginal given the operational demands of STR management. Above 15% is exceptional and typically achieved through arbitrage or unusually favorable purchase prices rather than standard financed acquisitions in most major markets.

How is cash-on-cash return different from cap rate?

Cap rate measures NOI as a percentage of property value and ignores financing. Cash-on-cash return measures annual net cash flow (after mortgage payments) as a percentage of total cash invested. Cap rate compares properties; CoC compares what your actual deployed capital earns.

Does cash-on-cash return include mortgage paydown?

No. CoC measures only pre-tax cash flow divided by cash invested. It does not count principal paydown, appreciation, or depreciation tax benefits. Those are real components of total return but are excluded from CoC to keep the metric focused on actual cash produced.

About MagicBnB

MagicBnB (magicbnb.io) is a portfolio intelligence platform for short-term rental operators. The Deal Analyzer calculates cash-on-cash return for both purchase and arbitrage scenarios with conservative and optimistic revenue modeling. For active portfolios, the P&L Statement tracks actual net cash flow per property month over month, and Milo AI can answer any question about your returns in plain English. Visit magicbnb.io.