Search how DSOs value dental practices and every result gives you the same two things: a formula, adjusted earnings times a multiple, and a table of multiple ranges by practice size. Both are real. Neither will tell you what a buyer will actually offer for your practice, because the formula is the last line of the buyer’s process, not the process itself.
I spent four years on the buy side of dental M&A, inside a DSO’s acquisition process, where we reviewed more than a thousand practices and built the models behind the offers. Valuation was not an abstraction in that seat; it was the job. This post walks through how the number actually gets made. If you are earlier in your thinking, start with our complete guide to selling your dental practice and come back to this when you want to understand the offer math.
Your P&L Is the Input. The Buyer's Model Is What Gets Priced
Start with what the two documents are for. Your P&L is built to answer a tax question: how little taxable income can this practice legitimately show? The buyer’s model is built from that same P&L to answer an investment question: how much cash will this practice reliably produce for a new owner, and what can the buyer afford to pay for it?
So the buyer does not ignore your P&L. It starts there, then rebuilds it line by line into the version it can finance. The number that gets priced is the rebuilt version, not the version you file, and the two can sit far apart. That is why an owner who walks into a conversation quoting the top line, or the net income on the return, is quoting a number the buyer has already moved past.
Step One: The Buyer Rebuilds Your Earnings
The rebuilt number is EBITDA: earnings the way a buyer rebuilds them, for the trailing twelve months, meaning the most recent twelve closed months rather than last year’s return. Doctor compensation adjusted to a market rate. Rent adjusted to market when the owner holds the real estate. Personal and one-time expenses added back. It is the version of earnings every institutional buyer prices against, and every one of those adjustments moves real money. It is also why a buyer asks for monthly reports instead of a tax return: it wants the twelve months that end last month, and it wants to see the direction inside them.
The largest single adjustment in almost every dental deal is owner compensation. You may pay yourself whatever the practice allows. The buyer has to pay a market-rate dentist to do your clinical work after you step back, so the model replaces your compensation with that market rate, usually pegged to production. With illustrative numbers: an owner producing $1.5 million gets modeled at something like $450,000 of replacement compensation, in the neighborhood of 30 percent of production, regardless of what the owner actually took home. If you paid yourself less than that, the adjustment lowers your earnings. Owners are often surprised that this line can cut both ways.
Then comes the add-back list: the personal and one-time expenses the seller proposes adding back to earnings. This is where the most money changes hands on paper, and it is where sellers with clean documentation pull ahead of sellers with plausible stories. Every dollar on that list gets tested against one question: will the buyer truly not incur this expense after close? I wrote a full post on why DSOs reject add-backs, because on the buy side I sat on the reviewing end of those lists, and the patterns in what survived were remarkably consistent.
What comes out of this step is a normalized earnings figure. From here on, that number is your practice as far as the buyer is concerned.
Step Two: The Base Is the Trailing Twelve Months. Everything Else Moves the Multiple
Here is the part the formula articles get backwards. The buyer prices one number: adjusted earnings for the trailing twelve months. Not a calendar year, not last year’s return, and not a forecast. That base does not get replaced by a story about the future. What the future does is change what the buyer will pay for each dollar of it.
That is where the questions I covered in what DSOs look for when buying a dental practice live: how much of production depends on the owner personally, which direction those twelve months are trending, how concentrated the payor mix is, and whether there is physical capacity to add a provider. In the model these are not talking points. They are assumptions that move the multiple and the structure of the offer. A practice trending up earns a higher multiple on the same base. A practice where the owner produces 80 percent of collections does not get a smaller earnings number; it gets a lower multiple, a longer required transition, more of the price deferred or held back, or all three.
The buyer also models the practice under its own ownership: its supply and lab contracts, its payor rates, its staffing model. That pro forma version is what the practice is worth to that particular buyer, and it sets the ceiling on what the buyer can pay. It is not a number the seller gets paid. The buyer keeps those gains as its return, which is why the sharper negotiation is over the multiple on your earnings, not over the buyer’s synergies.
Step Three: The Multiple Is an Output of Two Models, Not a Menu
Only now does a multiple enter the picture, and this is the most misunderstood part of the entire subject.
The ranges you see published are real, in the narrow sense that they are averages of other people’s closed deals. What they are not is a menu. No buyer starts with “practices your size get X” and works backward. The multiple comes out of two models at once.
The first is the one about your practice: how durable the earnings are, how transferable they are, how much growth the buyer can underwrite after close. Two practices with identical collections can receive offers hundreds of thousands of dollars apart, and both offers can be rational, because the models behind them believe different things about the earnings.
The second model is the buyer’s own balance sheet, and sellers almost never see it. A group that is buying practices is almost always doing it with borrowed money; private equity owners add debt to the groups they own specifically to fund acquisitions. That money comes with conditions. Credit agreements typically permit acquisitions only while the borrower’s leverage, measured after the new deal is added, stays under a ceiling the lender set; the test is written into the loan as a pro forma leverage ratio that may not exceed a stated level. The group’s investors are also counting on the arithmetic of buying practices at a lower multiple than the one the whole group will eventually be sold at, so there is a price above which your practice stops making their math work. And when interest rates rise, debt service consumes cash that used to fund the next acquisition, which is part of why offers across the industry moved the way they did over the last three years. So the multiple a group can offer this quarter is bounded by its covenant room, its cost of capital and the arbitrage it is underwriting before anyone has read a line of your P&L. Two groups looking at the same practice in the same month will price it differently partly because they are different borrowers.
This is also why no online calculator can value your practice. A calculator, whoever builds it, prices you off the handful of inputs it can ask for. The buyer’s model prices the inputs that take diligence to see: provider dependence, trend direction, documentation quality, capacity. The calculator’s number is not conservative or aggressive. It is uninformed, and an uninformed number is exactly as likely to set your expectations too low as too high.
What this means practically: the highest-value work a seller can do is not shopping for the buyer with the biggest advertised range. It is building the version of the practice the model believes, durable earnings, documented add-backs, reduced owner dependence, and then putting it in front of more than one borrower at the same time, because the second model is the one you cannot change and can only compare. The multiple follows the models.
The Number Gets Reviewed More Than Once
One more thing the formula articles never mention: no offer comes out of a spreadsheet unreviewed.
Before any offer goes out, the buyer’s internal team works through the seller’s numbers, or builds its own model, and sends clarifying questions back to the seller or broker. That review runs through multiple layers, from the analysts who build the model up through directors and vice presidents to the chief development officer, before a final number is stamped. By the time you see an offer, several people who have never met you have stress-tested the assumptions behind it. I wrote about what a DSO investment committee actually asks because that room is where the model’s assumptions face their sharpest questions.
Then, after a letter of intent is signed, the numbers get tested a second time in the quality of earnings review. Most buyers are required by their lender or sponsor to commission one, typically from an independent firm that works directly with the seller to verify the earnings and the add-backs. It is not an ambush. But it is the true test of the numbers, and earnings that were asserted rather than documented tend to shrink there. The valuation you keep is the one that survives both reviews.
Why a Dollar of Earnings Is Worth So Much More Than a Dollar
Everything above compresses into one piece of math every seller should carry around.
Because the price is built as a multiple of earnings, every dollar of earnings you add or successfully defend before going to market is worth a multiple of that dollar at close. With illustrative numbers: if practices in your bracket were trading at 7x, a single dollar of earnings found today would be seven dollars at closing, and a $50,000 add-back that fails for lack of documentation would be $350,000 off the price. Not because anyone negotiated hard. Because the model multiplies.
That is the real answer to how DSOs value dental practices. Not a formula you can run at your kitchen table, but a model you can prepare for: the trailing twelve months rebuilt line by line, a multiple that rises where the earnings look durable and falls where they look fragile, a buyer whose own lenders set the ceiling, and a review by people whose job is to find the weak assumptions before the wire goes out.
Find Out What the Model Says About Your Practice
Every published range and every calculator gives you the market’s answer. The number that matters is the model’s answer about your practice specifically, and the best time to learn it is while you still have time to change the inputs.
That is what our free practice valuation is built to do. It reads your practice the way a buyer’s model does and shows you where you stand, which adjustments help you, and which levers are worth pulling before you ever talk to a buyer. No obligation, and no listing pitch. If the first version of your valuation a buyer ever sees is their own, you are negotiating against a number you never got to check.