The €10 Billion Deal HR and Payroll Leaders Should Be Watching

Earlier this week, I read a LinkedIn post that started with “Dear Payroll, it’s time we break up.”

The argument goes as follows: “Payroll is a finance function wearing an HR costume. It touches cash, it touches the general ledger, it needs the same rigor as AP and AR. Finance already has the controls, the audit muscle, and the accountability structure to run it well. People Ops has the muscle to build the systems that determine whether the company can execute at all. Fix the ownership before you fix the process.”

We seem to have this debate every other month, so I responded the way I always do: “It doesn’t matter. Payroll can work seamlessly with HR and with Finance. As long as the payroll team is on top of this, there is no real benefit in one or the other. If there was, this debate would have been decided decades ago.”

And I firmly believe that. But this week gave me a much more interesting answer to the question than either of us offered. And it came from a private equity firm.

One destination, two starting points

Silver Lake made the news twice recently, and once you put these deals side by side, I think they are aimed at the same target, even though they don’t look alike at all. The goal, as far as I can tell, is this:

Mission-critical business software remains extremely valuable, but the winners will increasingly be the platforms that hold enormous amounts of proprietary data and workflows, offer broad functional support, and have the scale to invest heavily in AI. More specifically, it will be the platforms that own the financial, regulatory, and economic workflow of a business. HR, payroll, accounting, tax, banking, payments, compliance, all of it, running through one connected system instead of a dozen separate ones.

The first indication for my thinking came last month, when Reuters broke the news that Silver Lake is reportedly in talks to take Workday private, in a deal that could run north of $50 billion (but unconfirmed at this time). And then a week ago, Silver Lake announced it is merging two companies it already owns, Cegid and Silae, into a group worth more than €10 billion. The transaction is expected to complete first half of 2027. For Cegid and Silae, the announcement frames the combination around connecting HR, payroll, accounting, financials, payments and digital banking: “a fully integrated and compliant suite covering their end-to-end financial and administrative needs”. I haven’t seen a lot of comments on the Cegid and Silae deal, maybe because of the geographic focus. And obviously, no one at Silver Lake has said anything about Workday. But here’s what I think is happening: these two companies, starting from very different places, can support the full economic, financial and regulatory workflow of a business.

Workday covers two layers

Workday’s stock jumped on the rumors. All year, fears for a SaaSpocalyps had driven stock prices down. Companies like Workday charge by the seat: the more employees a company adds to the platform, the more it pays. When AI agents replace people, the number of seats goes down and future revenue (growth) is at risk. That fear has been lowering SaaS valuations for a while now.

But Workday has high customer retention and deeply embedded workflows. They also have strong customer relationships, and own the permissions and proprietary data that AI functionality runs on. What Workday needs is a new AI architecture for this next phase. That’s a project that takes time and resources. It is easier to build that as a private company, outside of the public markets with its focus on quarterly earnings.

The question then becomes how close can get Workday to the goal. Workday already runs the financial and HR workflow for a large number of enterprises, which puts it genuinely close to the target in its home markets. It doesn’t own the certified regulatory infrastructure in other jurisdictions. If they go private, it gives them time to build the AI layer on top of what they already has. But going private doesn’t close the regulatory gap.

Cegid and Silae: a three layer combination

Cegid and Silae take another route to the same destination, and the combination is more interesting than the announcement suggests. Cegid brings accounting, e-invoicing, tax, ERP (including some HR), and, through its recent Shine acquisition, banking. That’s the financial layer. Silae brings payroll and HR, built on certified integrations that route French payroll data to the authorities. It has a similar kind of regulatory footprint across Spain and Portugal, built through Cegid’s 2022 merger with Grupo Primavera. That’s the regulatory layer. Shine’s banking and payments capability on top of both will add the economic layer, the actual movement of money in and out of the business.

This is why the combination makes sense. Cegid has financial, regulatory and, through Shine, a piece of economic. Silae adds missing financial and regulatory pieces. Together, they can offer the full business layer. It is not easy to get certified to legally transmit (payroll) data to a government, and it is often a long accreditation process. The new company also sits on behavioral data accumulated from processing hundreds of thousands of payrolls across industry-specific collective bargaining agreements in Southern Europe.

This deal will also create a unit of 1,400 engineers, one of the largest development groups in European business software. They will build AI-powered products for SMEs and their accountant partners. A team of that size only makes sense once payroll, accounting, e-invoicing, and banking data all live in one place. The regulatory environment helps: new EU and local rules are pushing companies towards digital processes and data submissions. If the new company can pull all these workflows together, the regulatory depth will make this platform hard to replace. As Christian Lucas, Silver Lake’s EMEA managing partner, said in a statement: “Together, Cegid and Silae can offer a unique end-to-end suite of software and AI-powered products serving the SMBs and their professional advisors who are the dynamic heart and soul of the European economy.”

The asset is the workflow, not the software

When you control the financial, regulatory, and economic workflows that runs through a business, and also the data those workflows generates every single time a company runs it, you hold the raw material AI needs to be effective. A system that sees the employee, the data, the payroll run, accounting entries, tax filings, and the cash movement firmly controls a business (add the commercial workflow and data to that and the value increases).

That’s also what makes the Payroll in HR-versus-Finance debate beside the point. This argument assumes HR, payroll and Finance are separate systems (as is often the case today) that need a team to bridge the gap between them. Somebody has to own the connections, because right now they are built and maintained by separate teams. Cegid and Silae are betting that requirement goes away. If HR, payroll, accounting, and banking data run on one system instead of several connected ones, there’s no gap left for a person to own, and no department needs to discuss who manages it. An accountant and an HR leader will be looking at the same connected system and use the same workflows, regardless of which department payroll technically reports to. The ownership debate becomes a question about people management and focus, not about data architecture, which is what it should have been all along.

Different journey, same goal

I’m not contrasting these two companies as potential competitors. They are not. I am using them as example for where the combination of business functions, including HR, Payroll and Finance may be headed. Workday Financial Management sits right next to Workday HCM, and the HR-and-Finance combination Cegid and Silae are building already exists inside Workday’s product line and has for years. What Workday doesn’t own right now is the regulatory payroll infrastructure apart from a few countries. It gets there through certified payroll partners connected to its own platform. Workday pursues a breadth strategy: a way to stand up compliant payroll in a lot of countries reasonably quickly and it’s a valuable one. Cegid and Silae pursue a depth strategy: years of accumulated collective bargaining data and direct certified integrations with specific government authorities, in the countries where they operate. Both approaches get employees paid correctly. But only one of them owns the regulatory infrastructure and the data moat that comes with it, rather than routing through someone else’s network. And I think that will be a crucial moat.

That’s the real gap to bridge, and it’s a also stickiness gap. Workday holds financial and HR workflow data for many large enterprises, but outside its home markets, it doesn’t capture regulatory data the way Cegid and Silae can. And I know the comparison doesn’t quite hold up, because of the geographic focus: it’s easier to build depth when you operate in a few countries, than when you support global enterprises in many. Migrating a large enterprise off an HRIS can be expensive and disruptive, and these projects take time. Migrating payroll is a different order of risk: it means re-establishing all integrations, and a single mistake in the data results in employees not getting paid correctly or a missed or wrong government filing. Companies tolerate a great deal of pain with their current payroll to avoid that. That stickiness comes from owning the regulatory payroll engines and integrations directly, not from routing payroll through a partner layer, and it’s what Cegid and Silae have that Workday, for now, doesn’t.

What comes next

I don’t think integrating Cegid and Silae will be easy. Payroll and Finance have a low tolerance for error, and stitching together country-specific compliance across accounting, payroll, and banking is a multi-year job. I’m not even talking about the underlying (legacy) architectures and data fields that must be aligned. It could be easier to take all that knowledge and build something new. But I think the direction is the interesting part as it confirms something I’ve been watching closely. While people on Linkedin keep arguing about which department should own payroll, the future direction of these two companies suggests the investors don’t think that answer matters much anymore. What matters is who integrates and owns the financial, regulatory, and economic workflow, and the data it produces. Because that’s something real that AI can build on.

I’ve never had a preference for where payroll sits. I’ve watched it work equally well inside HR and inside Finance. But there’s a pattern appearing, and it’s the one the LinkedIn post pointed to. Young companies put Payroll in Finance, simply because Finance exists from day one and HR doesn’t. And combined with a strategy of firmly integrating the economic, financial and regulatory workflows (if my assumptions hold up), that might give us a hint for where payroll ends up sitting. I’ll be closely following where it goes once the real work starts.

PS: I also think this will fundamentally change HR. But that’s a story for another day.