Cash-on-cash return, explained

The formula

Cash-on-cash return = Annual pre-tax cash flow ÷ Total cash invested

Annual pre-tax cash flow is what’s left after collecting rent, paying all operating expenses, and making the mortgage payment. Total cash invested is everything you put in at purchase: down payment, closing costs, and any upfront repairs.

A worked example

Consider a $280,000 single-family rental:

Purchase terms:

• Down payment (25%): $70,000
• Closing costs: $4,200
• Minor repairs at acquisition: $3,800
• Total cash invested: $78,000

Annual income and expenses:

• Gross annual rent: $24,000 ($2,000/month)
• Operating expenses (40% of gross): −$9,600
• Net Operating Income: $14,400
• Annual mortgage payment (30-year, 7%, on $210,000): −$16,762
• Annual pre-tax cash flow: −$2,362

At these financing assumptions, this property generates negative cash flow — a CoC return of approximately −3%. The cap rate on the same property is 5.1% ($14,400 ÷ $280,000), which looks acceptable. The difference is the mortgage payment.

Now shift the scenario: the investor puts 40% down instead.

• Down payment (40%): $112,000
• Closing costs: $4,200
• Repairs: $3,800
• Total cash invested: $120,000
• Annual mortgage (on $168,000, 7%, 30-year): −$13,410
• Annual pre-tax cash flow: $990
• Cash-on-cash return: 0.8%

Better, but still thin. Same property, same cap rate, and the loan terms are the difference between bleeding cash and limping to break-even.

Cash-on-cash vs. cap rate: the key distinction

Metric	Accounts for financing?	Useful for
Cap rate	No	Comparing properties at the asset level
Cash-on-cash	Yes	Evaluating your actual return on invested capital

Cap rate is an asset-level metric: it tells you what the property yields independent of how anyone finances it. That makes it useful for comparing deals and estimating market value.

Cash-on-cash is an investor-level metric: it tells you what your specific capital deployment yields given your specific loan. Two investors buying the same property with different down payments, loan amounts, and interest rates will have identical cap rates and very different cash-on-cash returns.

What drives CoC up or down

Raises CoC:

• Higher rent relative to price (better market fundamentals)
• Larger down payment (lower debt service)
• Lower interest rate
• Efficient management (keeping expense ratio in check)
• Value-add: buying below market and forcing appreciation through renovation

Lowers CoC:

• High interest rates (current environment)
• Low down payment, especially when rates are high
• High operating expense ratio (older property, high taxes, poor management)
• High acquisition price relative to achievable rent

Cap rate grades the property; cash-on-cash grades the deal you actually financed. A strong building on bad loan terms still bleeds every month, so read both.