Cash Flow Is
the Whole Game

I'll say the unpopular thing first: I don't invest for appreciation.

Not because appreciation isn't real, and not because I don't benefit from it. I do. But appreciation is a consequence of owning a good asset for a long time — it is not a strategy, and it is certainly not something I'll pay for up front. Cash flow is what pays the mortgage, covers the roof, funds the next deal, and lets me hold an asset long enough for appreciation to ever show up. Cash flow is the whole game. Everything else is a byproduct.

Here's what that actually means in practice, and how the math works.

How a dollar of rent becomes a dollar in your pocket

Before anything else, you have to understand the waterfall. Most people can recite it. Fewer respect it.

You start with gross potential rent — what the rent roll says you'd collect if every space were full and every tenant paid on time. That's a fantasy number, so you subtract vacancy and credit loss to get to reality. What's left is your effective gross income.

From there you subtract operating expenses — property taxes, insurance, common-area maintenance, management, repairs. In neighborhood retail on triple-net leases, tenants reimburse much of this, which is one of the great structural advantages of the asset class. But notice the word much, not all. And note that during a vacancy, nobody is reimbursing you for anything — you're paying the taxes, the insurance, and the CAM on that empty space yourself.

What remains is net operating income — NOI. This is the number the entire industry values you on. It is also, critically, not your money. From NOI you still subtract debt service, which gets you to cash flow before taxes — the number that actually hits your account. And if you're being honest, you subtract capital reserves too: roofs, parking lots, HVAC units. Those aren't hypotheticals. They're a when, not an if, and a pro forma that ignores them is a pro forma that's lying to you.

Confusing NOI with cash flow is the single most common mistake I see. NOI is what the market pays you for. Cash flow is what you live on.

The three numbers that tell you the truth

Cap rate is the unleveraged yield — NOI divided by price. It tells you how the market is pricing the asset, with no financing in the picture.

Cash-on-cash return is what your money earns after the bank is paid. It's the only one of the three that reflects your actual experience as an owner.

DSCR — debt service coverage ratio — is NOI divided by annual debt service. It answers one question: can the property survive its own loan? It's the lender's veto, and it should be yours too.

(I built free calculators for cap rate, cash-on-cash, and DSCR — run your own numbers.)

What a 7 cap actually means in this market

Here's the part most sellers won't say out loud.

In this market, a property marketed at a 7 cap or below will not be cash flow positive with a typical mortgage. That's not an opinion, it's arithmetic. Run it yourself: put reasonable leverage on a 7-cap asset at today's rates, on a normal amortization schedule, and the debt service eats the NOI. You are buying the privilege of feeding the property every month.

So when I see a deal priced at a low cap rate, I don't ask "why is this so expensive?" I ask a better question: what is the seller telling me about where the return is supposed to come from? Because if it isn't in the cash flow, it has to be somewhere. And there are really only two answers.

Answer one: the upside is in the value-add. (Sometimes I'll take that deal.)

A property with below-market rents will often trade at a low cap rate precisely because everyone in the room can see the upside. The in-place income is weak, so the current yield is weak — but a strong operator can re-lease the space, turn over the underperforming tenants, and bring the asset up to market. The cash flow isn't there today; it's there in year two or three, and you have to go take it.

This kind of deal I'll consider, case by case. But the entire decision rests on execution risk, and I underwrite it as a project, not as a purchase:

• How far below market are the rents, really? Not what the broker says market is — what I know market is, because I lease space in this corridor every year.
• How fast can I actually get there? Which leases roll, and when? What are the term lengths? Is there a tenant I need to buy out, or one I can simply not renew?
• Which tenants am I turning over, and can I replace them? A below-market tenant in a space nobody wants isn't upside, it's a vacancy waiting to happen.
• Can the property carry itself while I do the work? This is the one people skip. If the plan takes two years and the asset bleeds cash for those two years, that's not a value-add deal — that's a bet with a countdown timer on it.

When the answers are strong, this is exactly how you create value: you force the NOI up, and because commercial real estate is priced on income, the value follows. That's not appreciation. That's construction and leasing — work I control, on a timeline I set. It's the same math behind every repositioning we've done.

Answer two: the appreciation is already in the price. (This one I avoid outright.)

The other reason an asset trades at a low cap rate is that the market has already priced in future appreciation. Somebody has decided this is a hot market, growth is coming, and they'll pay today for tomorrow's rents.

I strongly avoid this kind of asset — the kind with little to no actionable upside. You're not buying a business anymore; you're buying a bet on a narrative. And you're paying full price for it up front, then feeding it every month while you wait for a story to come true.

I underwrite appreciation at 3–5% a year. Conservatively. That's roughly the long-run average across asset classes and regions, and it's what I'm willing to assume when I have no control over the outcome. Anything above that is a gift, not a plan.

Paying a low cap rate to get into a hot market is a dangerous game, because what markets give very quickly, they tend to take back just as fast. The exuberance that compresses a cap rate is the same exuberance that expands it again when sentiment turns — and cap rate expansion on an asset that never cash-flowed is how people lose buildings. If you're negative on cash flow and wrong on appreciation, you don't have a mediocre investment. You have a liability with a mortgage attached.

The distinction between these two deals is everything. In one, I create the upside with work I control. In the other, I pay for upside that someone else has already assumed. One is an operating business. The other is speculation wearing a suit.

The mistake I see most: "the NOI covers the mortgage"

I talk to a lot of new investors, and there's one error I hear more than any other. They'll underwrite a deal to zero cash flow — no cushion, no return — and call it fine, because the in-place NOI covers the mortgage payment. The property pays its own debt, so what's the problem?

The problem is that breaking even isn't a return. It's a bet that nothing goes wrong.

Underwriting to zero cash flow quietly ignores the entire reason you put money into the deal: a cash return on your down payment. Your equity is supposed to earn something. And when it earns nothing, you're not just missing upside — you're exposed to a stack of risks with no buffer against any of them:

• Opportunity cost. If the risk-free rate on cash exceeds your real cash return, you are being paid less to take on a leveraged, illiquid, management-intensive asset than you'd earn leaving the money in a money-market account. That's not an investment; it's a worse version of doing nothing.
• Inflation. A zero real return erodes every year you hold. Standing still is actually falling behind.
• Tenant risk. Tenants leave, underpay, or stop paying. If your model has no margin, the first hiccup turns break-even into negative, and negative into a capital call from your own pocket.

That's why every purchase should either produce cash flow on day one, or have a credible plan to get there fast — inside a year. Not "eventually." Not "once the market catches up." Cash flow, or a short, controllable path to it, is the cushion that absorbs the risks you can't see coming. Without it, you're not investing — you're hoping.

Why this market rewards patience

It's worth being blunt about the moment we're in, because it changes the answer.

Borrowing costs have been elevated since 2022 — going on four years now. But asset prices have largely held, and cap rates have moved up only marginally, nowhere near enough to keep pace with what debt now costs. When the cost of your mortgage rises faster than the yield on the asset, the spread that used to create cash flow disappears. The result is simple: very few deals on the market today can actually be cash flow positive. The math just doesn't clear.

In an environment like this, the discipline isn't finding a clever way to make a bad deal pencil. The discipline is not buying.

Personally, in times like these, I'd rather be passive — let the good deals come to me than aggressively force a bad one onto a spreadsheet. There is no rule that says you have to transact. Patience is a position. The investor who sits on his hands in a market that doesn't pay, and keeps his powder dry for the one that does, beats the investor who felt he had to stay busy. Activity is not the same thing as progress, and in this business, the deals you don't do are often the ones that save you.

Why cash flow is what actually keeps you alive

Once you understand that framing, the case for cash flow stops being about returns and starts being about survival.

Cash flow is your margin for error. A center that cash-flows can absorb a vacancy, a bad roof, a tenant who takes six months to replace. One that doesn't cash-flow has no shock absorber — every surprise comes straight out of your pocket, and surprises are the only thing this business guarantees.

Cash flow buys you time, and time is the whole advantage. An asset that pays you means you are never a forced seller. Forced sellers lose money — always, in every cycle. The investor who can hold through a downturn is the one who gets to see the other side of it. Ironically, that's exactly what lets you capture appreciation: cash flow is what lets you hold long enough for it to arrive. Appreciation isn't the strategy. It's the reward for having a strategy that survives.

Cash flow compounds. It funds the reserve account, the next improvement, the down payment on the next deal. Appreciation is locked in the walls until you sell or refinance. Cash flow works for you now.

And cash flow is honest. It's very hard to fake. Appreciation is a projection — and projections are exactly where wishful thinking hides.

Where pro formas lie

When a broker sends me a deal, I'm reading the pro forma looking for the same handful of lies:

• Understated vacancy. Nobody stays 100% leased forever. If the model assumes it, the model is fiction.
• No capital reserves. The roof is not optional. The parking lot is not optional.
• Phantom income — tenants paying rents their businesses can't actually support. It cash-flows beautifully on paper right up until they leave. (This is why I underwrite the tenants, not just the leases.)
• Heroic lease-up assumptions. "Stabilized in six months" is a sentence, not a plan.
• Ignored debt structure. Balloon dates and rate resets have ended more deals than bad tenants ever have.
• NOI presented as if it were cash flow. It isn't. It never was.

How I underwrite

I underwrite to cash flow, and I underwrite to survive.

Every deal gets stress-tested against the downside, not just the base case. Reserves are treated as a real expense, because they are one. Vacancy is assumed, because it happens. Appreciation gets 3–5%, because I don't control it. And the property has to be able to carry itself — through a vacancy, through a slow re-lease, through a bad year — before I'll consider what it might be worth someday.

If a deal only works when everything goes right, it doesn't work. If it only works if the market keeps running, it isn't an investment — it's a position, and positions get liquidated.

The discipline

Appreciation is a reward. Cash flow is a strategy.

The deals that fail almost never fail because they ran out of upside. They fail because they ran out of cash. Buy assets that pay you while you own them, create the upside yourself where you can, and let appreciation be the bonus you collect for having been able to hold on.

That's the whole game.

Brunswick Properties acquires, develops, and manages neighborhood strip malls across New Jersey. Want to run the numbers yourself? Use our free cash-on-cash and DSCR calculators, or get the free eBook. If you have a deal, let's talk.