Why your rental's '8 percent return' might really be 4 percent

A real estate investor we work with bought a single-family rental in March. The numbers in his deal memo looked clean. Purchase price $375,000. Expected rent $2,500 a month, or $30,000 a year. He told his partners it was an 8 percent return property.

Eight months in, the investor sat down to compare his rental to a different deal he was considering. We pulled apart the actual bookkeeping on the first property and asked a different question. Not how much rent came in. Not what the property cost. How much cash he had put into the deal, and how much cash actually came back out each year.

The answer was 4.5 percent.

The property had not changed. The bookkeeping was not wrong. The 8 percent number was just measuring something that does not help an investor make a decision. The 4.5 percent number does.

This is the difference between gross yield and cash-on-cash return, and it is the single most common reporting gap we fix on real estate portfolios.

What gross yield measures

Gross yield is the simplest number in the world. Annual rent divided by purchase price.

If you collect $30,000 a year on a property you bought for $375,000, your gross yield is 8 percent. It is the number on most listing sites. It is the number a wholesaler quotes you. It is the number that gets written on a cocktail napkin when someone is pitching you a deal.

Gross yield is useful for one thing. Comparing the income productivity of one property to another at the moment of purchase, with no other context.

It is not a return. It does not tell you what your money earns. It ignores everything that costs you money to own and run the building, and it ignores the fact that you probably did not pay $375,000 in cash.

What cash-on-cash return measures

Cash-on-cash return asks two specific questions.

How much cash did you put into the deal? Down payment is the big number. Closing costs run another 3 to 5 percent of the purchase price. Initial repairs to make the property rent-ready might add several thousand more. Lender-required reserves can pull another month or two of payments out of your bank.

How much cash came back out in a year? Rent minus mortgage payment (principal and interest), property taxes, insurance, property management, maintenance, vacancy reserve, and capital expenditure reserve.

The math is the same regardless of whether the property cost $200,000 or $2,000,000. Net annual cash flow, divided by the total cash you invested. The answer tells you what your money is actually earning, and it is directly comparable to what the same dollars could earn somewhere else.

What the rental actually looked like

Here is the same $375,000 property, measured both ways.

Line	Gross yield view	Cash on cash view
Annual rent	$30,000	$30,000
Property taxes	not counted	($6,000)
Insurance	not counted	($1,400)
Property management (8%)	not counted	($2,400)
Maintenance and repairs	not counted	($2,200)
Vacancy reserve (5%)	not counted	($1,500)
Mortgage principal and interest	not counted	($11,100)
Annual net cash flow	$30,000	$5,400
Down payment (20%)	not counted	$75,000
Closing costs	not counted	$11,000
Initial repairs	not counted	$9,000
Lender reserves	not counted	$25,000
Total cash invested	$375,000	$120,000
Return	8.0%	4.5%

Two real numbers from the same deal. Neither one is fake. They are just answering different questions.

Why this matters more than it looks

A 4.5 percent cash-on-cash return is the number an investor should weigh against other places that money could sit. A high-yield savings account, a money market fund, the stock market, a different rental property, a syndication. The decision becomes meaningful. The 8 percent gross yield is not comparable to any of those.

It also matters for the decision to leverage. The same property bought all-cash at $375,000 would have a different cash-on-cash return entirely. Net cash flow would be much higher because there is no mortgage. Total cash in would be much higher because no loan. The cash-on-cash number is what tells you whether using a mortgage is improving the return or hurting it.

And it matters for portfolio decisions. Some properties throw off 12 percent cash-on-cash. Some throw off 2 percent. Both might look like “good deals” on gross yield. The cash-on-cash report tells you which property to refinance, which one to sell, which one to keep.

What real portfolio reporting looks like

For the real estate clients we work with, every property has a monthly cash-on-cash report that pulls real numbers from the books.

Net cash flow is calculated after every operating expense and after debt service. Total cash invested is tracked as a balance sheet figure from the day of purchase, updated for any capital improvements that put more cash in. The result is one number per property, comparable across the portfolio and against any other investment the owner is considering.

It takes about two hours a month per property if the bookkeeping is clean. Without it, investors run on gross yield and assume the portfolio is fine.

Best practices for rental investors

A few habits that keep cash-on-cash honest:

• Track every dollar of cash that went into the deal as a balance sheet item, separately from operating expenses. Down payment, closing costs, initial repairs, reserves. All of it lives on the balance sheet as your investment in the property.
• Calculate net cash flow monthly using accrual books, not just the bank account. A month where you skipped maintenance is not a great cash flow month. It is a deferred expense month.
• Keep a capital expenditure reserve in the calculation. Roofs, HVAC, appliances. They will hit and they will hurt the return when they do. Plan for them every month at 5 to 10 percent of rent.
• Run cash-on-cash by property, never as a portfolio average. The average hides the bad ones.
• Re-measure cash-on-cash every year against current rent and current expenses. A property that returned 8 percent in year one might return 3 percent in year five if rents stagnate and repairs grow.

Three questions worth asking

If you own one or more rental properties, here are three things to take into your next conversation with whoever does your books.

1. What is the cash-on-cash return on each of our properties for the trailing twelve months?
2. How is total cash invested tracked, and is it updated when capital improvements happen?
3. Are we including a capital expenditure reserve in the net cash flow calculation, or is that hiding somewhere else?

If those answers come back uncertain, the portfolio is being measured on gross yield. That is fine for marketing. It is not fine for deciding whether to keep, refinance, or sell.

If you want a second set of eyes on yours, send the last twelve months of rent rolls and the closing statement from your most recent purchase. We will tell you whether the real return is what you think it is, or whether the gross yield has been doing all the talking.