Shared services are usually pitched as a cost-saving measure: one finance team instead of four, one payroll system instead of four, one procurement function negotiating on behalf of the whole group instead of four separate managers ordering separately. That saving is real, but it is not the main reason shared services matter to a portfolio. The larger effect is on the quality and speed of the group's reporting, and reporting quality is one of the two things that determine enterprise value.

What shared services do

In a portfolio built around a platform, each business keeps its own P&L, its own customers and its own identity. What moves to the centre are the functions that do not need to be reinvented at every business: finance and controls, people operations, procurement, and often customer operations. Run once, with defined processes and named owners, these functions produce one close calendar, one chart of accounts, one set of vendor terms and one hiring process across the whole group, instead of a different version at each business.

The cost effect

The direct saving is straightforward to describe, if illustrative rather than a promise: four separate bookkeeping functions, run part-time or outsourced inconsistently, typically cost more in aggregate than one properly staffed shared finance function serving all four, and the shared version closes faster and with fewer errors. The same logic applies to procurement, where combined purchasing volume across a portfolio usually earns better terms than any single business could negotiate alone. This is the saving most people mean when they talk about shared services.

The reporting effect

The less obvious effect is on what the group can report, and how quickly. A portfolio with shared services produces one consolidated management pack, on one schedule, with margin visible by business unit, product and channel. A portfolio without them produces four separate packs, on four schedules, in four formats, that someone then has to translate into a single view by hand, usually late and usually with errors. Buyers, lenders and investors underwrite the second kind of portfolio more slowly and more skeptically than the first, because inconsistent reporting is itself evidence of an uncontrolled business.

Sequencing shared services against acquisitions

  • Build the finance function first. A single close calendar and chart of accounts should exist before a second business joins, so the new business has something to be migrated onto.
  • Centralise people operations early. Hiring, payroll and basic HR policy run once, so an acquired team is onboarded rather than left running its own process indefinitely.
  • Bring procurement together as volume grows. Combined purchasing terms become material once there are enough businesses buying the same categories to matter.
  • Keep customer operations local where the customer relationship is local. Not every function needs to centralise; the test is whether centralising improves the customer's experience or only the group's paperwork.
  • Fund the shared-services build with [growth capital](/insights/growth-capital-before-acquisitions), not with the next deal. Acquisitions should join a shared-services layer that already exists.

What goes wrong without it

A portfolio that skips shared services and scales through acquisition anyway usually discovers the cost later and less pleasantly: at diligence, when a buyer's advisers cannot reconcile the group's numbers to its consolidated statements, or at a lender review, when covenant calculations differ depending on which business's finance team produced them. By that point, building shared services is no longer a planned investment; it is an urgent remediation done under a deadline someone else set. The shared services for founder-led businesses note describes what the function looks like at the single-business stage, before it has to carry a portfolio.

The founder's role changes too

Shared services also change what the founder or platform leader spends their week on. Instead of comparing four sets of numbers produced four different ways, they review one consolidated pack and spend their attention on the businesses the numbers flag, not on reconstructing the numbers themselves. That shift, from reconciling data to acting on it, is a large part of what value creation means in a portfolio context, and it is one of the clearest signals to an outside buyer that the group is genuinely run as one business rather than several loosely connected ones.