Two Rivers Dental, a third location, and the office that isn't paying for itself yet

The moment

Two Rivers Dental has two offices in Springfield, Missouri. It is mid-November. October's insurance-claims squeeze has passed — the payer released what it was holding, and the operating account is back to its usual rhythm — but the question it raised is still sitting there. A third office, in Ozark, fifteen minutes south, has come up twice in the last month: a hygienist who lives there asked about it, and a retiring dentist's lease is available at a rent the practice manager keeps mentioning.

The instinct is to model the third office the way the second one was modeled four years ago: take what the second one collects now, assume the third does roughly the same, and work out how long it takes to pay for itself. That instinct skips a question. The second office is fourteen months old, still carrying the loan that built it out, and nobody has actually checked whether it clears its own full cost yet — direct costs plus the share of rent, admin and the dentists' own pay that a fair accounting would put on it. A location can collect real money every month and still not be paying for itself once everything it costs is counted.

What they did instead

The practice manager's read on the second office was the P&L line for it: $92,000 collected most months, against costs that "felt like" somewhere in the $70,000s. That felt like a comfortable margin, and comfortable margins don't get re-checked.

What that read leaves out is anything the practice pays for once, in one place, on behalf of both offices — the shared biller, the office manager's own time split across two schedules, insurance, and the fit-out loan that built the second office out fourteen months ago, which shows up on a loan statement rather than the second office's own monthly report. None of that is hidden. It is just filed somewhere that isn't "the second office's numbers," so a glance at what the second office brings in never meets it.

The cost of skipping that check is not a bad decision by itself — it's that the practice would have started pricing out an Ozark lease against a location that, honestly measured, is still $1,000 a month behind where it needs to be. Whatever the third office actually costs to ramp, that hole would have opened under two locations at once instead of one.

The questions a CFO asks first

1. What does the location you already have actually collect, and what does it cost — not the shared costs, the ones that exist only because this one does?
2. What is this location's fair share of everything shared — rent, admin, insurance, the owner's own pay?
3. Once that's counted, does it clear, or is it still running behind?
4. If it clears: how long would a new one take to reach the same point, and how much cash does it burn getting there? Nobody can answer that exactly, so a range, not a guess dressed up as a fact.
5. What's actually set aside to fund that stretch?
6. If volume doubles across the practice, what breaks first — and is that answer the same today as the day the loan on the second office is paid off?

The arithmetic, shown

Scenario one — the second office's true numbers, today. $92,000 collected in an ordinary month. $46,000 in direct costs — hygienists, assistants, supplies and lab fees tied only to that office. $47,000 in its fair share of overhead once the fit-out loan is counted in full: the office's own portion of rent, insurance and the practice's shared admin, plus the loan payment itself.

$92,000 minus $46,000 minus $47,000: this location runs a loss of $1,000 a month.

This location isn't profitable once everything it costs to run is counted — so the tool won't model doubling it, and no third-office question is even asked.

There's a reconciliation worth naming here, not invented for this guide: the whole practice clears about $1,500 a month on an ordinary month's figures — the runway guide's own number. The original office nets roughly $2,500 of that on its own; the second office is the $1,000 pulling the practice-wide total down to $1,500. The second office was never the problem by itself. It's half the reason the practice-wide margin is as thin as it is.

Scenario two — the same office, ten months on, once the loan retires. Same $92,000 collected, same $46,000 in direct costs. The fit-out loan payment — $9,500 a month — drops off the overhead line once the loan matures, taking the fair share of overhead from $47,000 to $37,500. $92,000 minus $46,000 minus $37,500 is $8,500 a month, and now the location clears. Only past that point does the tool ask about a third office at all. Fitting out a third office — build-out, chairs, imaging, the lease deposit — is quoted at $180,000 before the first patient. A low guess of five months and a high guess of eleven months to break even, burning $4,000 to $9,000 a month while it ramps up: the cash needed before it pays for itself runs $200,000 to $279,000, on the practice's own numbers — the fit-out first, then the losses. $45,000 set aside falls short even of the best case, by $155,000. Asked what's most likely to break first if volume across the practice doubles, the practice manager doesn't point at chairs or hygienists — she points at collections, the same thing October just showed.

"Then the ceiling is cash timing, not cash total." Twice the patient volume usually means twice the claims sitting in review before any of it turns back into cash, on top of the $200,000–$279,000 hole above, not instead of it.

Scenario three — the overhead question left blank. Same $92,000 and $46,000, no figure given for the second office's fair share of overhead. The tool doesn't guess at a number or fall back to "costs felt like the $70,000s."

It names exactly what's missing — the fair share of overhead it should carry — and stops there rather than return an answer built on a guess nobody actually made.

What changed

Nothing gets priced out in Ozark yet. The practice put the Ozark conversation on hold until the second office's own numbers turn around, which on the loan schedule is about ten months out. In the meantime the fit-out loan payment itself becomes the number the practice manager checks monthly, not the collections line — because collections were never the thing telling her the office wasn't paying for itself yet.

When the loan does retire and the office clears $8,500 a month, the range above — $200,000 to $279,000 to open a third location, most of it the fit-out — becomes the actual planning number, not the collections figure everyone was watching before. And the working-capital note carries forward from what October already cost the practice once: a third office doesn't just need cash to ramp, it needs more room under the same claims-timing squeeze that made October tight in the first place.

What the tool will not do

It will not tell the practice whether Ozark is a good location, whether a retiring dentist's patients transfer, or whether the hygienist who asked about it actually wants to run it. Those are judgments about a place and a person, not arithmetic.

It does not know what a bank would lend against, what a lease actually costs to break if the plan changes, or what financing the ramp would add on top of the cash hole it computes. None of that is in the range above.

It will not turn "months to break even" or "cash burned while ramping up" into a single number. Both are guesses about something that doesn't exist yet, and the tool shows the low and high ends rather than average them into one figure that looks more certain than it is.

It does not rank what breaks first at double the volume against the cash hole, or score one as worse than the other. That question gets named and handed back, not computed — the practice is the only one who actually knows whether it's collections, a person, a supplier or floor space that gives out first.

It is arithmetic on the figures entered. If the second office's true overhead share is wrong, the loss or the profit it shows is wrong by the same amount, and so is everything computed after it.