How to Report an Add-On Acquisition to Your Board: Consolidated vs. Pro Forma vs. Organic (With a Worked Example)

The first board package after an add-on closes is the easiest one to get wrong. Revenue is up 29%. EBITDA is up. The chart looks great. And nobody in the room can tell how much of that is the business you ran and how much is the business you just bought.

There are three honest ways to show the numbers after an acquisition, and a good package shows all three, on separate lines, with labels. Consolidated is what you own. Pro forma is what the combined company looks like as if you'd owned it all along. Organic is what you did with what you already had. Mix them in one chart and the board will draw the wrong conclusion. Or worse, they'll draw the right one and stop trusting the chart.

Why this is about to be your problem

If you're PE-backed, an add-on is coming, if it hasn't already. Add-ons made up 72.9% of all US PE buyouts in 2025, according to PitchBook data in Cherry Bekaert's 2026 outlook, right in line with the five-year average. Nearly three of every four deals is a company being bolted onto a platform someone already owns. And the direction hasn't changed this year: PitchBook reported in June that platform buyouts kept losing share through May 2026 as sponsors shifted to tuck-ins they can finance.

So the platform's finance team, which is usually a controller and two people, inherits a second set of books, a second close, and a board that wants one story.

The three lenses, defined

Consolidated, or reported, results include the add-on from the closing date forward. Nothing before. This is what GAAP says you own, it's what the auditors will sign, and it's what the bank statements will match.

Pro forma, or combined, results include both companies for the full period, as if the deal had closed on the first day of the comparison period. Prior-year numbers get restated the same way. This is how you see the trend of the business you now run.

Organic growth measures the business you owned at the start of the prior period. Acquired revenue stays out until it has been in both the current period and the comparison period. It's the answer to "how are we doing on our own?"

Public serial acquirers do exactly this. EverCommerce defines its pro forma growth rate as though every acquisition had closed on the first day of the prior-year period, then says plainly in the same filing that pro forma growth is not organic growth. Two numbers, two labels, no confusion.

A worked example

Northline, the platform, did $30.0M of revenue in 2025 and grows about 8% a year. On May 1, 2026 it buys Riverside, which did $9.0M in 2025 and is on track for $9.6M in 2026.

Northline owns Riverside for eight months of 2026, so $6.4M of Riverside's revenue lands on the consolidated P&L.

Lens	2025	2026	Growth
Consolidated (reported)	$30.0M	$38.8M	29.3%
Pro forma (combined)	$39.0M	$42.0M	7.7%
Organic (platform only)	$30.0M	$32.4M	8.0%

Three growth rates from the same year, and all three are correct. The 29% is a fact about the deal. The 7.7% is the trajectory of the company the sponsor now owns. The 8.0% is management's report card.

Notice that pro forma growth is lower than organic growth. Riverside grows slower than Northline, so the acquisition dilutes the growth rate even while it adds $9.6M of revenue. That's the kind of thing a board should hear from you in month one, not discover from a banker two years later.

What the lenders count

Your credit agreement has its own version of pro forma. For a permitted acquisition, most agreements let you include the acquired company's EBITDA for the full trailing-twelve-month test period, not just the months you owned it. In the quarter you close, that can be the difference between passing and failing the leverage test.

Run the Northline numbers. Platform EBITDA of $5.0M plus eight months of Riverside at $1.0M gives consolidated EBITDA of $6.0M. Pro forma, with Riverside's full-year $1.5M, it's $6.5M. On $20M of debt, that's 3.3x versus 3.1x. If the agreement also allows run-rate synergies and you can support $400K of them, it moves again, to 2.9x.

Those synergy add-backs are where the arguments happen. In a June 2026 review of broadly syndicated loan terms, Davis Polk found the cap on run-rate cost savings and synergies typically lands around 25% to 30% of EBITDA, for actions expected within 24 to 36 months. Middle market agreements are often tighter than that, and some want an officer's certificate. Read your own definition of Consolidated EBITDA before you count a dollar of it, and put the calculation on the covenant tracker the month the deal closes.

Two questions every board asks

When does the add-on become organic? When it's been in both the current and the comparison period. If you closed May 1, 2026, then May 2027 is the first month Riverside counts as organic, and 2028 is the first full year where it does all the way through. Some companies wait for the first full quarter after the anniversary instead. Either works. Pick one, write it in the package footnote, and don't change it.

Do we restate the budget? No. The budget you approved in December was for Northline. Keep it, so the board can still see whether the core business is on plan. Give Riverside its own column and use the deal model's year-one case as its budget. For the first twelve months, the add-on gets measured against what the sponsor underwrote, not against a plan that never included it.

What the package looks like after close

The board package doesn't get longer. It gets one new page and a few new lines.

The P&L stays consolidated and GAAP, with the add-on shown as its own column or segment so the reader can see the pieces. The prior-year comparatives switch to pro forma, with a footnote saying so. The summary page gets a small bridge: reported growth, less acquired revenue, equals organic growth. One line, every month, same place.

Then the new page: the deal scorecard. Add-on revenue and EBITDA against the deal model. One-time integration costs against the integration budget, tagged consistently so they're clean add-backs later. Synergies underwritten, synergies realized, and the date each one landed. This is the page the operating partner reads first, because it's the thesis.

And the variance commentary has to name the lens it's using. "Revenue up 29%" means nothing without "reported" or "pro forma" in front of it.

Where it goes wrong

Purchase accounting will make the add-on look worse than it did in diligence. Inventory step-up flows through cost of goods sold for a few months and flattens the gross margin. Intangible amortization sits below EBITDA but hits net income. Transaction costs get expensed. None of that is a performance problem, and all of it needs a sentence in the commentary before someone asks.

The add-on's cutoff and revenue recognition rarely match yours on day one. If Riverside booked revenue on invoice and Northline books it on delivery, the first consolidated close will contain a timing difference that looks like growth, or looks like a miss. Align the policy before the first close, or at least quantify the gap and say so.

And if the platform is a multi-location business, build the organic line the way retailers do, on a same-store basis, so a location the platform opened and a location that came with the add-on don't get lumped together.

The point

The board doesn't need more numbers after an acquisition. It needs to know which question each number answers. Reported tells them what they own. Pro forma tells them where it's heading. Organic tells them how management is doing. Show all three, label them, and keep the labels the same every month until the add-on stops being an add-on.

That's part of the reporting work we run at Plametrix as an outsourced FP&A service for PE-backed and growing companies: the consolidated close, the pro forma comparatives, the covenant math, and a board package that tells the same story the sponsor's model does.