Cash-on-Cash Return in REPE Interviews

Cash-on-cash is one of the first return metrics students meet in real estate, and one of the easiest to misuse. Interviews want the definition, the leverage link, and why IRR still matters. If you only quote a Year 1 cash-on-cash, you sound like a brochure, not an underwriter.

The short answer

"Cash-on-cash is annual levered cash flow before tax divided by equity invested. It answers how much cash yield the equity earns in a period, usually Year 1 or a stabilized year. It is not IRR. IRR includes the timing of all cash flows and the exit. I use cash-on-cash for income yield and IRR or equity multiple for full-cycle return."

Formula and definitions

Cash-on-Cash = BTCF / Equity Invested
BTCF ≈ NOI - Debt Service (+/- other recurring cash items)

Be precise about the numerator:

• NOI is operating, before debt
• BTCF (before-tax cash flow) is after debt service
• Some people loosely say "cash flow after debt" without naming BTCF. Say the words.

Denominator is equity check at closing (purchase equity plus any immediate reserves you treat as invested capital), not the whole purchase price.

Levered vs unlevered

Cash-on-cash is almost always a levered yield metric in REPE interviews. Unlevered yield cousins are cap rate (NOI / price) and sometimes cash yield on cost. Do not mix them.

Leverage raises cash-on-cash when debt is cheap relative to the asset yield and when amortization is modest. Leverage can also crush cash-on-cash when rates reset, IO periods end, or NOI dips.

Why interviewers ask

They are testing three things:

1. Can you define it without confusing it with cap rate?
2. Do you see how financing changes equity yield?
3. Do you know its limits versus IRR?

A property can show a handsome Year 1 cash-on-cash because of interest-only debt and then look ugly when amortization starts. Another can show a modest cash-on-cash and a strong IRR because of appreciation and refinance proceeds. Say that out loud.

Worked mini example

Purchase $10.0m. 60% LTV loan at interest that implies $360k annual debt service. NOI $650k. Equity $4.0m.

Now raise debt service to $480k after a rate reset. BTCF falls to $170k and cash-on-cash drops to 4.25% with the same NOI. That is the interview point: financing risk shows up in cash-on-cash before it shows up in a naive cap-rate slide.

Where it sits on a pro forma

In interviews, walk the stack:

1. Effective gross income
2. Operating expenses
3. NOI
4. Debt service
5. BTCF
6. Cash-on-cash on equity

If reserves, TI/LC, or recurring CapEx are material and cash, decide whether your "cash-on-cash" is before or after those uses. Consistency beats pretending every deal has zero CapEx.

Cash-on-cash vs IRR

Strong verbal: "Cash-on-cash tells me income return on equity this year. IRR tells me whether the whole plan cleared our hurdle including exit. I would not buy on cash-on-cash alone."

Common traps

1. Using NOI / equity and calling it cash-on-cash (that ignores debt service)
2. Using BTCF / purchase price (that mixes levered numerator with unlevered denominator)
3. Quoting Year 1 IO cash-on-cash as stabilized
4. Treating cash-on-cash as risk-free because it is "cash"
5. Ignoring preferential promotes or above-market fees that change LP cash yield

Follow-ups you should expect

30-second verbal

"Cash-on-cash is before-tax cash flow after debt service divided by equity invested. It is a period equity yield, not an IRR. I check whether the yield depends on temporary IO terms, and I still underwrite full-cycle IRR and exit assumptions."

Related

Interest Rates and Cap Rates, Yield on Cost vs Cap Rate, Value-Add Underwriting.

Practice on SheetRank

On multifamily and value-add cases, compute Year 1 and stabilized cash-on-cash beside IRR. If those two stories disagree, your interview answer is explaining why, not hiding one of them.