Cap rate and cash-on-cash return are two of the most common percentages in rental property analysis. Both start from net operating income, both are quoted as a percentage, and they’re often mentioned in the same breath. But they measure different things, and mixing them up leads to confusing comparisons.
The two formulas side by side
Cash-on-cash return = (NOI − Annual debt service) ÷ Total cash invested
The differences come down to two choices:
| Cap rate | Cash-on-cash return | |
|---|---|---|
| Numerator | NOI | NOI minus debt service (cash flow) |
| Denominator | Property value or price | Cash actually invested |
| Includes financing? | No | Yes |
| Describes | The property | The investor’s cash position |
| Changes with loan terms? | No | Yes |
What cap rate tells you
Cap rate describes the property’s income relative to its price, as if purchased entirely with cash. It doesn’t change based on who buys the property or how they finance it. That makes it a good tool for comparing properties to one another, and for estimating value from NOI.
What cash-on-cash return tells you
Cash-on-cash return describes how much annual cash flow the investor receives for each dollar of their own cash. It depends on the down payment, the interest rate, the loan term and the closing costs. Two investors buying the same property with different loans will see different cash-on-cash returns.
One property, several results
A $360,000 property with $25,200 NOI
The cap rate is $25,200 ÷ $360,000 = 7.00%, regardless of financing. Cash-on-cash return depends on the loan. Each scenario includes $9,000 of closing costs in cash invested.
| Financing | Cash invested | Annual debt service | Annual cash flow | Cash-on-cash |
|---|---|---|---|---|
| All cash | $369,000 | $0 | $25,200 | 6.83% |
| 25% down at 5.5% | $99,000 | $18,396 | $6,804 | 6.87% |
| 25% down at 6.5% | $99,000 | $20,479 | $4,721 | 4.77% |
| 25% down at 7.5% | $99,000 | $22,655 | $2,545 | 2.57% |
Hypothetical numbers for illustration. 30-year amortization.
The cap rate stays at 7.00% in every row. Cash-on-cash return ranges from 2.57% to 6.87% depending only on the financing.
Why leverage moves cash-on-cash up or down
The table shows something that surprises people: borrowing doesn’t always raise cash-on-cash return. Whether it does depends on how the cost of the loan compares to the property’s yield.
- At 5.5%, the loan’s annual payments are a smaller share of the loan balance than the property’s yield on price. Each borrowed dollar earns more than it costs, so leverage raises cash-on-cash return above the all-cash result. This is often called positive leverage.
- At 7.5%, the relationship flips. The loan costs more per dollar than the property yields, so leverage lowers cash-on-cash return below the all-cash result — negative leverage.
Cap rate alone can’t show this effect, because it ignores financing. Cash-on-cash return alone can hide it, because it doesn’t show what the property produces before the loan. Looking at both together makes the role of financing visible.
When each one is more useful
Cap rate is often more useful for:
- Comparing properties at different prices in the same market
- Estimating value from NOI (value = NOI ÷ cap rate)
- Understanding market pricing, since cap rates are widely reported for property types and areas
Cash-on-cash return is often more useful for:
- Comparing financing options on the same property
- Measuring how efficiently invested cash is producing cash flow
- Comparing a rental’s cash yield to other uses of the same cash
What both leave out
Neither metric includes:
- Principal paydown, which builds equity without showing up as cash flow
- Appreciation
- Tax effects such as depreciation
- Changes over time — both are typically single-year snapshots
Broader measures like total ROI or internal rate of return bring these in, at the cost of needing more assumptions about the future.
Common mix-ups
Comparing one property’s cap rate to another’s cash-on-cash return. These answer different questions and aren’t directly comparable.
Calling cash flow ÷ price a cap rate. Once debt service is subtracted, it’s no longer NOI, and the result isn’t a cap rate.
Leaving closing costs out of cash invested. That inflates cash-on-cash return.
Assuming more leverage always means a better return. As the example shows, it depends on the rate.
Reading them together
A simple habit is to put the two numbers next to each other for every scenario:
- Start with cap rate to see what the property produces relative to its price.
- Compare it to the loan’s annual cost — the yearly payments as a percentage of the loan amount. If the loan costs less than the cap rate, leverage tends to lift cash-on-cash return; if it costs more, leverage tends to pull it down.
- Then look at cash-on-cash return for each financing option, alongside the dollar amount of cash flow.
This sequence separates two questions that are easy to blur: how does the property perform? and how does this particular financing change the result?
The takeaway
Cap rate measures the property: NOI relative to price, independent of financing. Cash-on-cash return measures the investor’s cash: annual cash flow relative to the cash put in, entirely dependent on financing. The same property has one cap rate but many possible cash-on-cash returns — and comparing the two shows whether a given loan is helping or hurting the cash yield.