Cash-on-Cash Return for STR Investors, Explained

Most investors treat cash-on-cash return as a single number a property either clears or doesn't. It isn't. Put less money down and the same property produces a higher cash-on-cash percentage — nothing about how it performs has to change. That's not a trick anyone is playing on you; it's just what the math does when you divide by a smaller number.

What cash-on-cash return actually measures

Annual pre-tax cash flow, divided by the cash you actually put in, times 100. Cash flow here means everything's already been paid — mortgage included. Cash invested means your deposit, closing costs, and furnishing, not the purchase price.

Put $150,000 in and clear $12,000 a year after every cost and every mortgage payment, and that's an 8% cash-on-cash return.

It's the only common return metric that touches your bank account the way you'd actually feel it: what did my money earn, this year, after everything.

Cash-on-cash vs. cap rate vs. total ROI

Three numbers get used almost interchangeably. They shouldn't be.

Cap rate ignores financing entirely

Net operating income divided by property price — before any mortgage payment. A property with $30,000 in net operating income on a $500,000 purchase has a 6% cap rate, whether you paid cash or financed 90% of it. That's exactly the point: cap rate can't be changed by how you finance the deal, which makes it good for comparing properties and useless for judging your specific one.

Cash-on-cash only exists once financing enters

It's the opposite of cap rate. Cash-on-cash measures the return on the money you personally committed, not the property's unfinanced performance — which is exactly why it moves when your financing does.

Total ROI adds in what hasn't happened yet

Total ROI goes a step further than both, adding equity built through principal paydown and any appreciation on top of cash flow. It's the most complete number and the least useful for a quick decision, because appreciation is a forecast, not a fact.

Use cap rate to compare properties. Use cash-on-cash to judge your actual deal. Use total ROI to understand the multi-year picture, and hold it loosely — half of it hasn't happened yet.

For these and the other metrics that decide whether a purchase makes sense, the investor's glossary covers all eight side by side.

The trap: same property, two different numbers

Here's where it gets misleading. Take one property, run it through two different buyers.

Buyer A puts 35% down: $175,000 into a $500,000 property, clears $14,000 a year after costs and financing. Cash-on-cash: 8%.

Buyer B puts 20% down on the identical property: $100,000 in, and because the smaller down payment means a bigger loan and a bigger interest bill, clears $9,000 a year after costs and the larger mortgage payment. Cash-on-cash: 9%.

Same property. Same rents, same expenses, same market. Different financing, different number — and the buyer who put less down sees a better percentage despite a smaller dollar return. Push the down payment lower still and the percentage keeps climbing, right up until the interest bill grows so large that cash flow turns negative and the percentage means nothing at all.

This is why comparing cash-on-cash across two people's deals on the same property tells you about their financing, not about which one made the smarter purchase. If someone quotes you a cash-on-cash return, the next question is always: at what down payment, and what rate?

What actually moves the number that matters

Two properties with identical cash-on-cash math don't necessarily cost the same to run. Short-term rentals carry an expense structure long-term rentals don't: cleaning between every guest, platform fees on every booking, furniture and linens that wear out faster than a long-term tenant's would, and utilities the host pays instead of the renter.

None of that shows up in the formula until it shows up in your actual expenses. A cash-on-cash projection built on a long-term-rental cost assumption will overstate what the property actually clears, every time. The formula doesn't know your expense structure. You have to feed it the right one.

The sequence that actually works

• Start with cap rate. Compare properties independent of how anyone plans to finance them.
• Model your own financing. Cash-on-cash only means something once it reflects your actual down payment, rate, and closing costs — not a generic assumption.
• Price in STR-specific costs. Cleaning, platform fees, and furnishing wear aren't optional line items; they're the difference between a real number and an optimistic one.
• Ask what down payment produced the number. Any cash-on-cash figure without financing terms attached is telling you less than it looks like.
• Treat total ROI as the long game, not the decision. It's the fullest picture and the least certain one.

Run your own numbers, not a generic one

A market report can tell you what a listing in a given area typically rents for. It can't tell you your cash-on-cash return, because that number needs your financing and your costs, not the market's. Pull real rate and occupancy data for your specific market from Market Analysis, then run it through the Revenue Calculator with your actual down payment and expenses — that's the only way to get a cash-on-cash figure that's actually yours, rather than one that describes someone else's financing.