Is Your Market Actually Saturated? Run the Ratio Before You Answer

Ask most owners whether their market is saturated and they will answer from the driver's seat. Three spas on the way to the office, two more near the good grocery store, a new sign going up by the orthodontist. Verdict rendered.

That is not an analysis. It is a numerator with no denominator, and it is the number owners use to make six-figure and seven-figure capital decisions: whether to open, whether to expand, whether to sell.

I published a piece on this site a few days ago about what to compete on when there is a med spa on every corner. It took one thing for granted, that you had already decided your market was crowded. This post is the step before that one. Saturation is a real condition with a real test, the test takes about ninety minutes, and almost nobody runs it.

The national numbers do not say what either camp thinks they say

Start with supply. According to the American Med Spa Association's 2024 Medical Spa State of the Industry recap, US medical spa locations grew from 8,899 in 2022 to 10,488 in 2023. That is close to 18 percent more storefronts in a single year, which is the number the pessimists reach for.

Now the part they skip. Over the same period, average annual revenue per location rose from $1,307,587 to $1,398,833, about 7 percent. A market that adds nearly a fifth more capacity while the average location still earns more money is a market absorbing supply, not one choking on it. Nationally, in that window, the pessimists were wrong.

The optimists do not get to close the case either. On the demand side, the American Society of Plastic Surgeons' 2024 procedural statistics put neuromodulator injections at 9,883,711, up 4 percent from 9,480,949 the prior year, and hyaluronic acid fillers at 5,331,426, up 1 percent. Those are the two categories that pay most of the rent in this business, and they grew in the low single digits.

Supply growing near 18 percent against treatment volume growing 4 percent and 1 percent is a real signal. It is also not a clean subtraction: different survey populations, different years, and AmSpa's figures come from self-reported member data where a jump in the location count partly reflects better counting rather than new construction. Read it as a direction, not a gap. The direction is that units of supply are arriving faster than units of demand.

One number to discount entirely: 84 percent of med spa owners told AmSpa they expected revenue to increase. Owner optimism is not demand. It is a survey of people who have already committed the capital.

Your count is a numerator without a denominator

None of the above tells you about your own catchment, which is the only market you actually operate in. National absorption is cold comfort if your particular catchment is carrying twice the capacity it can feed.

So build the denominator. You need four numbers, and three of them you already have.

First, the throughput a location needs. According to the same AmSpa report, the average location books $1,398,833 a year against an average patient spend of $527 per visit. That implies roughly 2,600 visits a year for the average location, call it 50 a week. Treat that as an order-of-magnitude constant, not a precision instrument: those two averages come from slightly different reporting windows and the revenue figure includes multi-location groups that run larger than a single owner-operated site. It is directionally right, and it is dramatically better than nothing, which is what you are using now.

Second, your real catchment. Not a radius on a map. A drive-time boundary, fifteen or twenty minutes, because aesthetic patients on a maintenance cadence do not commute for it.

Third, the competitor count inside that boundary, which is the number you already carry in your head.

Fourth, the honest demand estimate for that boundary: adult population, the share with discretionary income at your price point, and a plausible annual visit frequency. You will have to make assumptions here. Write them down so you can argue with them later.

Then compare. Competitor count times 2,600 visits is the capacity your catchment is currently carrying. Set it against your demand estimate. That comparison is the answer to the question you have been answering from the driver's seat.

What the ratio tells you, and what it does not

It gives you one of three answers, and each one is a different decision.

Demand comfortably exceeds installed capacity. There is headroom, the crowding you feel is visual rather than economic, and entry or expansion is a question of execution rather than market structure. In my work with practices in growing suburban catchments, this is the most common result and the one owners least expect.

Demand roughly matches capacity, call it within 10 percent either way, which is about as much precision as these inputs deserve. Entry is still possible, but every patient you gain comes off a competitor's schedule. That is a share war, and share wars are won on a defensible reason a patient drives past three other spas to reach you. That is the subject of the piece I linked above, and it is the honest next question once the ratio comes back tight.

Demand is clearly below installed capacity. This is genuine saturation, and it is rarer than the anxiety suggests. When the number comes back here, the capital is almost always better spent deepening a position you already hold than opening a second front.

What the ratio does not tell you is whether the incumbents are any good. Ten weak operators do not occupy a market the way three strong ones do. The ratio sizes the room. It does not tell you how well the people already in it are playing.

The strategic recommendation

Block 90 minutes this week and run the four numbers before you make another capital decision. Draw the drive-time boundary first, because everything downstream depends on it. Count the locations inside it. Multiply by 2,600. Build the demand estimate with your assumptions written down beside it, not in your head.

Then write one sentence at the bottom: "My catchment has headroom / is tight / is oversupplied, and here is the number that says so."

Keep the page. Rerun it every 12 months, and again before any lease signature, any device purchase over six figures, and any conversation with a buyer. An owner who can produce that page is negotiating from a different position than one who can only report a feeling about traffic on the way to work.

Where GrowBien fits

The catchment ratio tells you how much room exists. It does not tell you how much of that room you are reaching, which is a question about your own funnel rather than the market's size. The practices I have seen misjudge a market are rarely wrong about the competitor count. They are wrong about their own reach. That second half is what GrowBien instruments for physician-led practices. If you want to pressure-test one against the other, book a free marketing review.