HR Setup for a Growing SME: What You Need at 10, 50 and 150 Employees

Why HR needs evolve with business complexity

Ask a growing SME when HR became a problem and the answer is rarely a headcount. It is usually a moment: the second office opened, the first layer of managers was appointed, a key employee left and nobody could find their appointment letter, or two people in the same role discovered they were on very different terms.

These moments share a cause. In a small company, HR runs through the founder's or owner's memory and judgement. Decisions are consistent because one person makes them. As the business adds managers, functions and locations, those decisions are made by more people, in more places, with less shared context. HR's job at that point is not to add bureaucracy. It is to make sure the business makes similar people decisions in similar situations — and can show how it did.

That is why the employee counts in this guide are illustrative stages, not rules. A 40-person company across three cities with a field sales team may need more HR structure than an 80-person company in one office. Use the stages as a prompt, then adjust for your own complexity.

What very small companies actually need

Before the first stage, an owner-managed business needs very little formal HR — but what it needs, it needs done properly. Every employee should have a written offer and appointment letter with the role, pay and key terms. Personal and bank details, identity documents and statutory registrations should be complete and stored in one place. Salary should be paid on time from accurate inputs. And someone should know which employment and payroll obligations apply to the business.

That is it. Very small companies do not need a policy manual, a competency framework or an HRMS. They need the basics that become expensive to reconstruct later.

Around 10 employees: clean foundations

At around ten people the owner still knows everyone, but HR administration starts to consume real time and small inconsistencies appear. The goal at this stage is clean foundations and one named owner.

Around 50 employees: consistency across managers

Somewhere between twenty and fifty people, most SMEs appoint their first real layer of managers. This is the stage where HR problems multiply fastest, because people decisions stop being made by one person. One manager approves leave generously, another does not. One team hires with a structured interview, another hires friends of friends. Appraisals happen in one function and not in another.

The goal at this stage is consistency: the same situation should produce the same response, whichever manager is involved.

Around 150 employees: HR as a management capability

By this stage the business typically has several functions, multiple managers per function and often more than one location. The owner no longer knows everyone. HR administration is necessary but no longer sufficient. The business needs HR thinking: how the organisation is structured, how managers are developed, how talent is planned and how people data informs decisions.

Roles and ownership: who owns HR at each stage

The most useful HR decision an SME can make is to name an owner. In many businesses HR is "shared" between the founder, finance and whoever manages the office — which in practice means nobody owns the outcome.

A common progression looks like this: the owner decides and a finance or admin person administers; then a dedicated HR executive or generalist handles operations while leadership sets policy; then an HR manager or senior HR leader owns the people agenda with an operations team or provider beneath them. Each step makes sense when the previous arrangement is visibly consuming leadership time or creating inconsistent outcomes.

There is more than one way to fill each step. Some SMEs hire; others bring in fractional HR leadership, outsource recurring operations, or use a consultant for a defined project. The comparison of Fractional HR, outsourced HR and HR consulting sets out when each model fits.

Policies and processes

SMEs tend to err in one of two directions: no written policies at all, or a downloaded manual that nobody follows. The practical middle is a short handbook built around the questions employees and managers actually ask — leave, working hours, attendance, expenses, travel, conduct, grievances, notice periods and separation.

A policy is only useful if it is applied consistently. Before writing a new policy, ask: who will apply this, how will they know, and what happens when someone asks for an exception? A policy that managers cannot explain will be quietly ignored.

Processes matter as much as policies. For each recurring HR activity — joining, confirmation, transfers, leave approval, exits — write down the steps, the owner of each step and the documents produced. That is what allows HR to run without depending on one person's memory.

Hiring

As an SME grows, hiring quality becomes one of the biggest drivers of whether the business can scale. The basics that pay back quickly are:

• A written role description before a role is opened, covering outcomes as well as tasks.
• An approval step so that hiring is linked to budget and structure, not only to one manager's request.
• A consistent interview approach — at least an agreed set of questions and a shared way of recording assessment.
• A defined offer process with standard formats and approval for exceptions.
• An onboarding plan for the first weeks, owned by the hiring manager.

For roles that are hard to fill or where hiring volume is rising, a structured recruitment process design is usually worth more than adding more sources of CVs.

Performance routines

Performance management in a growing SME does not need to start with ratings, bell curves or complex forms. It needs three things: employees knowing what is expected of them, managers having regular conversations about progress, and a periodic review that connects performance to development and reward decisions.

Start with clear goals for each role, a light monthly or quarterly check-in and an annual review. Add sophistication — competency frameworks, calibration, variable pay linkages — only once the basic rhythm is actually happening across all teams.

Employee lifecycle

The employee lifecycle — joining, probation, confirmation, role changes, transfers and exit — is where HR administration becomes visible to employees. Delays or errors here damage trust quickly. A new joiner without a laptop or login, a confirmation letter that arrives months late, or a full-and-final settlement that takes too long all send a signal about how the business treats people.

For each lifecycle event, agree a checklist, an owner and a target timeline. Track pending items. This is also the area SMEs most often choose to outsource, because it is recurring and rules-based.

HR systems

Spreadsheets are perfectly adequate at ten people. They become a risk when several people edit them, when data sits in several unconnected files, or when leadership cannot get a reliable headcount or attrition figure without a day of reconciliation.

When you choose an HRMS, begin with requirements rather than features: which processes need a workflow, which data must be accurate, which reports leadership needs, who needs access to what, and how it will connect to payroll. A simple system that is used well is more valuable than a comprehensive one that holds half the data.

What not to overbuild

Growing SMEs waste effort on HR in predictable ways. It is usually too early for:

• A detailed competency framework before roles are stable.
• Complex grading or salary bands for a workforce of a few dozen people.
• An enterprise HRMS configured for processes the business does not yet run.
• Engagement surveys with no capacity to act on the results.
• Long policy documents covering situations that have never arisen.

The test is simple: will this help managers make better, more consistent people decisions in the next twelve to eighteen months? If not, it can wait.

Signs HR is lagging behind growth

• The founder or owner still resolves routine HR questions every week.
• Employees in similar roles have noticeably different terms, with no clear reason.
• Managers apply leave, attendance or conduct rules differently.
• Nobody can produce a reliable headcount, joiner or leaver figure quickly.
• Performance reviews happen in some teams and not others.
• Joining or exit formalities are regularly delayed or incomplete.
• Good people leave and the business only learns why at the exit interview — if there is one.

Two or three of these together usually mean HR has not kept pace with the organisation.

What to review first

Resist the temptation to fix everything at once. Pick the area causing the most visible cost or friction — often HR operations, role clarity or performance management — and review it properly: what exists, what is inconsistent, and what is missing. Then fix the few things that matter most before moving to the next area.

Our HR audit checklist breaks HR into seven areas with the questions and evidence to review in each. If you are earlier in the journey — building HR from the first hires — the startup HR setup guide is a better starting point.

For SMEs that want structured support designing HR for their current stage, PathWeave offers HR consulting for SMEs, alongside broader HR services and HR operations and HRMS support.

This guide draws on PathWeave's operating experience across HR leadership, HR consulting and outsourced HR delivery. It is practical management guidance, not legal advice.