Cash-on-cash return explained
Cap rate tells you what a property earns. Cash-on-cash tells you what your money earns, which is a different question and usually a less flattering answer.
Cash-on-cash return = annual pre-tax cash flow ÷ total cash invested
The formula is simple and both inputs are routinely miscalculated in the same optimistic direction.
What counts as cash invested#
| Include | Exclude |
|---|---|
| Down payment | The loan amount |
| Closing costs — title, origination, recording | Future capital expenditure |
| Loan points and fees | Your own labour, usually |
| Inspection and appraisal | Anything financed |
| Make-ready and initial repairs | |
| Funded reserves | |
| Initial marketing and leasing fee |
The most common error is counting only the down payment. On a $300,000 purchase with 25% down, the cash invested is not $75,000. It is $75,000 plus $8,000 of closing costs plus $5,000 of make-ready plus a leasing fee — call it $89,500 — and using the smaller number inflates the return by nearly 20%.
Anything financed is excluded. A renovation rolled into the loan is not cash you invested.
What counts as cash flow#
Annual cash flow = net operating income − annual debt service
NOI is gross collected rent minus all operating expenses: property tax, insurance, management, maintenance, vacancy allowance, utilities you pay, licensing, HOA.
Debt service is principal and interest. Both, not interest only — the payment leaves your account whether it reduces the balance or pays the lender.
And the line most calculations omit: a capital expenditure reserve. A roof at year twenty and a furnace at year fifteen are certainties. Setting aside $100 to $200 per unit per month is realistic on older stock, and it frequently turns a modest positive return into a negative one.
That omission is why published cash-on-cash figures run higher than what owners actually experience. Nothing is being misrepresented; the reserve is simply not in the formula as usually presented.
A worked example#
A duplex at $300,000. Gross rent $2,800 a month.
Cash invested:
| Line | Amount |
|---|---|
| Down payment, 25% | $75,000 |
| Closing costs | $6,500 |
| Loan points and fees | $2,200 |
| Make-ready | $5,000 |
| Leasing fee, first tenancy | $1,400 |
| Total invested | $90,100 |
Annual operations:
| Line | Amount |
|---|---|
| Gross scheduled rent | $33,600 |
| Vacancy allowance, 6% | −$2,016 |
| Property tax, non-homestead | −$4,800 |
| Insurance, landlord policy | −$1,600 |
| Management, 9% of collected | −$2,842 |
| Maintenance | −$3,400 |
| Utilities, common areas | −$900 |
| Net operating income | $18,042 |
| Debt service on $225,000 | −$16,400 |
| Cash flow before reserves | $1,642 |
| Capital reserve, $125/unit/month | −$3,000 |
| Cash flow after reserves | −$1,358 |
Cash-on-cash before reserves: 1.8%. After reserves: negative 1.5%.
Neither figure is wrong. The first is what most listings and most calculators would show. The second is what the owner will experience once the roof needs replacing.
And the cap rate on the same property is 6.0% — $18,042 on $300,000 — which looks perfectly respectable. That gap between a healthy cap rate and a negative cash-on-cash is the defining feature of buying at current borrowing costs.
Run your own numbers in the cash-on-cash calculator — it counts all the cash you invest, includes a capital reserve, and shows the same property at six different down payments.
Positive and negative leverage#
The relationship that explains why the same property behaves differently for different buyers.
When the loan rate is below the cap rate, borrowing amplifies the return. Each borrowed dollar earns more in the property than it costs in interest.
When the loan rate is above the cap rate, borrowing reduces it. Each borrowed dollar costs more than it earns. This is negative leverage, and it is the ordinary condition in most markets at present.
Worked on the property above, cap rate 6.0%:
| Down payment | Loan | Cash invested | Cash flow | Cash-on-cash |
|---|---|---|---|---|
| 20% | $240,000 | $75,100 | $543 | 0.7% |
| 25% | $225,000 | $90,100 | $1,642 | 1.8% |
| 40% | $180,000 | $135,100 | $4,842 | 3.6% |
| 100% | $0 | $315,100 | $18,042 | 5.7% |
More equity produces a higher return here, which is the signature of negative leverage and the opposite of what most investors expect.
Where the loan rate sits below the cap rate the table inverts — less down produces a higher cash-on-cash return, and that is the environment most investing education was written in.
The practical consequence: the standard advice to minimise the down payment and maximise leverage is conditional advice, not a rule, and the condition frequently does not hold now.
What the number leaves out#
Cash-on-cash is narrow deliberately, and four things sit outside it.
Principal paydown. Every payment builds equity. Not cash, but real. On a $225,000 loan, first-year principal reduction is meaningful and it grows.
Appreciation. Uncertain, excluded, and historically the largest component of long-run returns in most markets.
Tax treatment. Depreciation shelters income, and the after-tax return frequently exceeds the pre-tax figure. This is a conversation with an accountant rather than a line in a formula.
Rent growth. The calculation is a snapshot of year one. A property at 1.8% in year one may be at 5% in year five if rents rise and the payment does not.
Total return combines all of it, and it is usually far higher than cash-on-cash suggests. But cash-on-cash answers the question that determines whether you can hold the property: does it feed you or do you feed it.
Cash-on-cash and cap rate together#
| Cap rate | Cash-on-cash | |
|---|---|---|
| Formula | NOI ÷ price | Cash flow ÷ cash invested |
| Includes financing | No | Yes |
| Same for every buyer | Yes | No |
| Answers | Is the price sensible | Does this work for me |
| Use it to | Compare assets and value them | Decide whether to buy |
Run both. A good cap rate with a negative cash-on-cash means the asset is sound and the financing does not work — which is a reason to change the financing or the price, not necessarily to walk away.
A poor cap rate with a good cash-on-cash usually means heavy leverage on an overpriced asset, and it is the more dangerous of the two, because it looks fine until the refinance.
How the number changes over a hold#
Cash-on-cash is a snapshot of year one, and year one is usually the worst year. Presenting it as though it were static is the most misleading thing about how it is normally used.
Three forces move it in your favour over time:
Rent rises and the payment does not. A fixed-rate mortgage means the largest expense is frozen while income tracks the market. On a property where rent grows 3% a year against a fixed payment, the cash flow compounds far faster than the rent does, because it is the residual after a fixed cost.
Principal paydown accelerates. Early payments are mostly interest and late payments are mostly principal. The equity build is slow at first and then not.
Your basis is fixed. Cash-on-cash divides by what you invested, which never changes. Every subsequent improvement in cash flow lands entirely in the numerator.
Worked on the earlier duplex, 3% rent growth, expenses growing 3%, fixed debt service of $16,400:
| Year | Gross rent | NOI | Cash flow | Cash-on-cash |
|---|---|---|---|---|
| 1 | $33,600 | $18,042 | $1,642 | 1.8% |
| 3 | $35,650 | $19,141 | $2,741 | 3.0% |
| 5 | $37,820 | $20,306 | $3,906 | 4.3% |
| 10 | $43,850 | $23,543 | $7,143 | 7.9% |
The year-one figure of 1.8% becomes 7.9% by year ten without rents doing anything unusual, purely because the largest expense is fixed and the denominator is frozen.
Which is the argument for judging a long hold on more than year one — and also the argument against buying something that loses money in year one on the assumption that time fixes everything, because the reserve line above is real and a property that cannot fund its own roof will not reach year ten intact.
Two forces work the other way. Property tax reassessment after purchase frequently raises the largest fixed operating cost, sometimes substantially, and insurance has been rising faster than general inflation in most markets. Both belong in a projection rather than an assumption of 3% across the board.
What good looks like, at different objectives#
There is no universal target, and the honest framing is what the money would otherwise do.
Against a risk-free alternative. If cash earns a meaningful yield with no work and no risk, a rental producing 2% cash-on-cash is not competing on cash flow. It is competing on principal paydown, appreciation and tax treatment, which is a legitimate case and a different one.
For an investor seeking income now — someone who needs the property to produce spendable money — high single digits or better, which currently means either a low-priced market, substantial equity, or a property with a specific value-add opportunity.
For an investor building long-term equity, a modest positive cash-on-cash that covers reserves is often sufficient, because the return is arriving as principal reduction and appreciation rather than as cash.
For a leveraged buyer in a negative-leverage environment, the honest test is whether the property survives its own worst year: a vacancy, a major repair and a rent that does not rise. A property at 1.8% cash-on-cash before reserves fails that test.
What none of these tolerate is a projection built on scheduled rent, no vacancy, no management and no reserve. That is the calculation that produces 8% on paper and a call to the lender in year three.
Making the number honest#
- Count all the cash, not just the down payment.
- Use collected rent with a vacancy allowance, not scheduled rent.
- Include management even if you self-manage.
- Use the non-homestead property tax rate.
- Get an actual insurance quote.
- Include a capital reserve, and know the age of the roof, furnace and water heater.
- Run it at several down payments to see which direction leverage is working.
- Then look at total return — principal, appreciation, tax — before deciding, because cash-on-cash alone understates a long hold.