Acquisitions are how PE firms build value. You buy a platform company, bolt on complementary businesses, and aim to sell at a multiple of what you paid within three to five years. The strategy is straightforward, but M&A integration—specifically the financial side—is where things get complicated.
For most portfolio companies, the CFO becomes the person caught between running the existing finance operation and absorbing a newly acquired business onto the same systems, processes, and reporting structure. Without the right support, that integration drags on for months, delays financial closes, burns out staff, and erodes the very value the acquisition was supposed to create.
It doesn’t have to work that way. Here’s what PE firms should know about setting up their CFOs and their portfolio companies for faster, smoother M&A integrations.
Why In-House Integration Falls Short
Most portfolio companies don’t have a dedicated implementation team sitting on the bench. When an acquisition closes, the people responsible for integrating it are the same people processing daily transactions, closing the books each month, and managing payroll. They already have full-time jobs.
Asking them to also stand up a new entity on the parent company’s systems creates a cascade of problems. Transactional processing slows down. The monthly close gets pushed back. Overtime hours pile up, stress increases, and what should take 30 days stretches into months.
That’s assuming the team even has the skills. Integrating an acquired company into an ERP system like Sage Intacct or NetSuite requires deep familiarity with the platform—how to set up new entities, map charts of accounts, configure AP and AR workflows, and consolidate reporting. Further, an in-house controller may have done two or three implementations in their entire career.
“You’re looking for a unicorn—a controller who’s done integrations with multiple systems, knows the ERP well enough to set it all up, and still handles the fundamentals of GAAP and daily accounting. Finding that one person is very difficult.” —— Chris Hartenstein, Practice Director, Consero
Some firms try a different approach: using the acquired company’s finance staff to run the integration. That’s typically even worse. Those employees are unfamiliar with the parent’s systems, don’t know the existing processes, and bring their own biases from whatever platform they were on before. Their learning curve is steeper, and the result is more friction, not less.
In a 30-minute call, we’ll benchmark your portfolio’s finance operations and identify where integration speed, reporting visibility, or cost structure can improve. You’ll get a free assessment — no strings attached.
The Case for Integrating Immediately
When a deal closes, waiting to integrate feels like a lower-risk option: let things settle, keep the acquired company running on its own systems for a few months, and tackle integration later.
In practice, waiting just creates a second wave of disruption. The acquired business goes through change management at close, adjusts to the new ownership, and then, six months later, gets hit with another round of upheaval when you finally migrate their systems.
The better move is to integrate right away. If a deal closes today, the implementation should start tomorrow, with the goal of having the acquired entity on the parent’s platform within 30 days. By month two, consolidated reporting is in place. By day 90, the acquisition is running on the same processes as the rest of the company—and the CFO isn’t thinking about it anymore.
starts tomorrow
the parent’s platform
reporting in place
CFO focuses forward
This approach consolidates the pain into a single window. The acquired team is already adapting to new ownership. Stack the system migration on top of that, get the change management behind you all at once, and move forward.
What a Successful M&A Integration Looks Like
A clean acquisition integration has a few defining characteristics.
- It’s fast—measured in weeks, not quarters.
- It produces consolidated reporting early, so the CFO and PE sponsor have full visibility into the combined entity without relying on manual Excel consolidations or shadow systems.
- It doesn’t disrupt the day-to-day finance operation that’s already running.
That last point is critical. The goal isn’t just to get the new entity set up. It’s to do so without pulling the existing delivery team away from their work. Month-end close still has to happen on time. AP and AR still have to be processed. If the integration taxes those resources, you’re creating a bottleneck, not adding value.
You achieve this with a dedicated implementation team that operates separately from the ongoing finance function. That team handles system setup, chart of accounts mapping, user configuration, process documentation for new employees, and the full technical migration. The existing team keeps closing the books.
The Repeatable Playbook Advantage
When you’ve done something hundreds of times, you develop a process that accounts for the things first-timers miss. Consero’s M&A integration playbook includes a 496-item checklist, built and refined over 180+ acquisition integrations across PE-backed portfolio companies.
Not every item applies to every deal. But that’s the point—the checklist is comprehensive enough to catch the unusual situations that cause problems when they’re overlooked.
One company might have a peculiar revenue recognition structure that needs special handling. Another might require a unique approach to multi-entity consolidation. A third might bring a completely different billing model that has to be mapped into the parent’s existing framework.
An in-house team doing their first or second integration simply won’t have a checklist like that. They’re building the plane while flying it. A partner with hundreds of integrations under their belt already knows what to look for, what to ask, and how to solve for edge cases before they become problems.
“Each subsequent acquisition gets easier. We tailor the playbook to the specific company, keep the same implementation resources assigned, and cut down the time it takes on the second, third, and fourth integration.” —— Chris Hartenstein, Practice Director, Consero
Free the CFO to Focus on What Matters
When a portfolio company’s CFO is stuck managing the plumbing of an acquisition integration (mapping charts of accounts, configuring bill pay solutions, troubleshooting system migrations) they’re not doing the work that actually drives value.
The CFO’s time after an acquisition should be focused on the work that accelerates the growth thesis:
- Aligning sales teams across the combined entity
- Integrating operational workflows
- Supporting due diligence for the next deal
- Providing strategic insight to the PE sponsor
With a partner handling the finance integration, the CFO isn’t pulled into transactional details. They set high-level expectations, get flagged when their input is needed, and focus on the change management and operational alignment that only they can drive. From day one—not 60 or 90 days later—their attention is where it should be.
And when the integration wraps, the CFO is already looking ahead. They can focus on the next acquisition target, continue executing the growth strategy, and trust that the financial infrastructure behind them is solid.
Don’t Overlook the Human Side of M&A Integration
Acquisitions aren’t just a systems problem—they’re a people problem. The acquired company’s finance staff often holds critical institutional knowledge: how the business handles unusual transactions, where the legacy system has workarounds, and which processes are genuinely unique to the operation.
Keeping those people engaged during the first 30 days of integration is essential. They’re the ones who can explain how things actually work on the ground, flag potential issues before they surface, and help map the old world into the new one. Losing that knowledge too early, or never capturing it, leads to gaps that are expensive to fill later.
At the same time, honesty matters. If the acquired team’s roles will eventually be replaced, being upfront about that from the start builds trust and keeps people cooperating through the transition. Making promises you can’t keep or delaying hard conversations creates resentment and undermines the integration.
Good communication with the acquired company’s team sets the stage for the entire process. Be clear about what’s changing, when it’s happening, and what you need from them. The rest follows from there.
Build the Infrastructure for Serial Acquisitions
For PE firms running a buy-and-build strategy, one-off integrations aren’t good enough. You need a repeatable model that gets faster and more efficient with each deal. That means standardized systems, proven processes, and a team that doesn’t need to be recruited, onboarded, and trained every time a new company comes through the door.
Every M&A integration should produce the same outcome: consolidated financial reporting within 60 to 90 days, the acquired entity running on the parent’s platform, and the CFO free to focus on the next chapter of growth. When that’s the standard, acquisitions stop being a drag on the finance function and start being the growth accelerator they’re supposed to be.
