The most common question growing companies ask is: "At what size do we need proper HR software?" There's no single right answer — but there are clear patterns. Most companies reach the point where informal HR processes start breaking down somewhere between 15 and 50 employees. The exact threshold depends on hiring velocity, role complexity, whether your team is remote or office-based, and the industry you operate in. This guide covers the actual thresholds, what breaks first, and how to tell if you're there.
The Honest Answer: It's Not About Headcount Alone
Two companies with 30 employees can have completely different HR needs. A 30-person tech startup hiring 10 people per year across multiple departments — engineering, sales, marketing, customer success — has fundamentally different process demands than a 30-person restaurant where hiring is seasonal, roles are similar, and a single manager oversees most staff.
The right question is not "how many people do we have?" but "what's currently breaking?" HR software is a solution to a set of problems. If those problems don't yet exist in your organisation, buying the software early doesn't create value — it creates overhead. Conversely, if those problems are actively costing your team time and creating compliance exposure, waiting longer than necessary is expensive in a different way.
The patterns below are based on where most companies experience process failures. They are thresholds, not rules.
What Usually Breaks First (And When)
Recruiting coordination breaks at ~15–30 employees
This is typically the first process that outgrows informal management. At 15–30 employees, you often have multiple hiring managers across different departments, several open roles at the same time, and no single person with complete visibility into the full pipeline. Candidates get lost between email threads. Feedback from different interviewers is scattered across inboxes. Job descriptions are inconsistent from one posting to the next. An ATS (Applicant Tracking System) addresses this specific problem — structured pipeline management, centralised feedback, and consistent job postings — before you necessarily need a full HR platform.
Onboarding breaks at ~25–40 employees
Below 25 employees, onboarding is typically informal and personal: someone walks the new hire around, sets up their accounts, answers questions over their first week. This works because the team is small enough that the founder or a manager can give each new person individual attention. Above 25, the ad-hoc approach begins to produce inconsistent outcomes. Some new hires get thorough onboarding; others spend their first month confused about basic processes. The variance isn't visible until it starts affecting retention and productivity. Onboarding workflows in an HR system standardise the experience without requiring someone to reinvent the process for every hire.
Leave management breaks at ~30–50 employees
At under 30 people, leave requests are handled informally — a message to a manager, a note in a shared calendar, a spreadsheet updated by someone with free time. Above 30, this approach creates disputes about remaining balances, lost records when managers leave the company, and genuine compliance risk in jurisdictions with statutory leave requirements. When you have 30+ employees across multiple managers, informal leave tracking is no longer manageable. An HR system with automated leave tracking, approval flows, and balance calculations removes the manual work and creates an auditable record.
Performance reviews break at ~50–75 employees
Informal performance feedback — a manager having an honest conversation with a direct report — scales reasonably well to about 20–30 total employees. Above 50, the problem is not that managers can't have those conversations; it's that without structure, some employees receive meaningful, documented feedback on a regular cycle while others receive nothing. The inconsistency becomes a fairness issue and, eventually, a retention issue. HR software with performance review modules provides templates, review cycles, and historical records that make the process consistent across managers and departments.
Employee records and compliance break at ~50–100 employees
At 50+ employees, contract management, certification tracking, and compliance documentation become a genuine operational and legal risk if handled in spreadsheets and email folders. This is particularly true in EU jurisdictions where GDPR, labour law audit requirements, and employment contract obligations apply. An HR system that stores contracts, certifications, and employment documents with proper access controls and audit trails is not a luxury at this size — it's a risk management tool. The cost of a compliance failure typically exceeds the annual software subscription many times over.
The Rough Thresholds — What Most Companies Experience
| Company Size | What Usually Breaks | What You Need |
|---|---|---|
| 1–15 employees | Almost nothing yet | Nothing formal |
| 15–30 employees | Recruiting coordination | ATS |
| 25–45 employees | Onboarding inconsistency | ATS + onboarding workflows |
| 30–60 employees | Leave tracking, HR records | Basic HR module |
| 50–100 employees | Performance, compliance | Full HR platform |
| 100–200 employees | Analytics, org planning | Full platform + reporting |
| 200+ employees | Enterprise governance | May exceed our scope |
The 30–75 Employee HR Module Threshold
If you're specifically asking when the HR module — not just the ATS — becomes worth the investment, the answer for most companies is somewhere between 30 and 75 employees. Below 30, a disciplined spreadsheet often works, particularly if your hiring volume is low and your team structure is simple. Above 75 without proper tooling, you're accumulating compliance exposure that spreadsheets cannot adequately manage.
In the 30–75 range, the decision depends primarily on two factors: hiring velocity and the proportion of your team's time consumed by manual HR administration. If you are growing by more than 20% headcount per year and your office manager or HR generalist is spending more than a day per week on manual leave tracking, document management, and onboarding coordination, the software pays for itself quickly. If growth is slower and the admin burden is genuinely light, there's no shame in waiting.
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What to Look for in HR Software for Growing Teams
Once you've determined that the timing is right, the next question is what to look for. The most important considerations for companies in the 30–200 employee range are meaningfully different from what enterprises need:
Unified platform vs. point solutions. An ATS from one vendor plus a separate leave management tool plus a separate performance module means double data entry, broken integrations, and a fragmented view of your workforce. A unified platform where a hire automatically becomes an employee record is significantly more efficient at this company size.
Ease of setup. Software that requires a three-month implementation project and a dedicated HRIS specialist to configure is built for enterprises. For growing companies, you need a platform that an HR generalist can set up in days, not months, without external consultants.
Pricing transparency. Watch carefully for per-employee pricing models that scale painfully as you grow, per-job fees that inflate your real cost if you hire regularly, and onboarding fees that inflate the first-year total cost of ownership. Flat-rate pricing that doesn't penalise you for growth is worth paying a modest premium for.
Feature scope matched to your actual needs. Buying an enterprise platform at 40 employees means paying for governance features, complex approval hierarchies, and workforce analytics that you won't use for years. The right platform is the one that covers your real requirements today without forcing you to buy capabilities you don't need yet.
Common Mistakes Growing Companies Make
Three patterns come up repeatedly when companies reflect on their HR software decisions:
Buying too early. Paying for software that sits largely unused because the operational pain isn't there yet. This is a real cost — not just the subscription fee, but the time spent configuring and maintaining a system that isn't solving an active problem. If your informal processes are working, there's no urgency.
Buying too late. Hiring 50 or 60 people on ad-hoc systems and then trying to retroactively import employment records, leave history, and onboarding documentation. Migrating from chaos is significantly harder than starting clean at 20 or 30 employees. The compliance exposure during the gap is also a real risk, particularly for companies operating under EU labour law.
Buying multiple disconnected tools. An ATS from one vendor, leave management from another, and performance reviews from a third creates a fragmented system where none of the tools share data. The integrations require maintenance, the data is inconsistent between platforms, and your team ends up spending more time managing the tech stack than managing people. A unified platform is almost always the right architecture for companies under 200 employees.
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Frequently Asked Questions
Do I need HR software at 20 employees?
Only if your hiring volume is high — roughly 10 or more new hires per year — or if you have multiple people involved in hiring decisions across different departments. Most 20-person companies don't yet have the volume or complexity to justify a full HR platform. An ATS alone may be worthwhile if recruiting is active; the full HR module is usually premature at this size.
What's the difference between an ATS and HR software?
An ATS (Applicant Tracking System) manages recruiting: job postings, candidate pipeline, interview scheduling, and offer management. HR software manages existing employees: leave, onboarding, performance reviews, document storage, and compliance records. A unified platform does both and shares data between them — so a hire automatically becomes an employee record without manual re-entry. That data continuity is one of the primary arguments for choosing a unified platform over separate tools.
Is a spreadsheet really not good enough at 30 employees?
It depends on which process you're managing. For some things, a spreadsheet is genuinely adequate at 30 employees. For leave tracking with 30+ people across multiple managers, it's a compliance risk — disputes over balances and lost records are common. For recruiting with multiple open roles and several hiring managers providing feedback, it's actively costing you candidates through slow response times and lost applications. The honest answer is: test whether your current process is creating problems. If it isn't, keep it. If it is, that's your signal.
When does HR software start paying for itself?
The payback calculation depends on what it replaces. For recruiting, an ATS that reduces time-to-hire by one week on a role paying €50,000/year saves more in vacancy cost than a year's subscription fee. For HR administration, if your HR generalist is spending five hours per week on manual leave tracking and onboarding coordination, automating that at €200/month is a straightforward trade. The break-even point is typically reached within the first two to three months of active use at the company sizes described in this guide.
Does Treegarden cover both the ATS and the HR module in one platform?
Yes. Treegarden is a unified ATS and HR platform. The ATS covers job postings, candidate pipeline, AI screening, interview scheduling, and offer management. The HR module covers employee onboarding, leave management, performance reviews, document storage, and compliance records. Candidates hired through the ATS are automatically created as employee records in the HR module — no manual re-entry. The platform is designed for companies in the 10–200 employee range and is priced at a flat monthly rate without per-employee or per-job fees.
The Right Time Is When the Pain Is Real
There is no universal headcount at which HR software becomes necessary. What there is, is a set of identifiable signals — recruiting coordination that's creating candidate drop-off, onboarding that's producing inconsistent new hire experiences, leave tracking that's generating disputes, performance reviews that are happening for some employees and not others, and compliance documentation that's living in someone's personal email. When those signals appear, the software pays for itself. Before they appear, it's overhead.
If you're asking this question, you're probably close to the threshold. The 6-question assessment below takes 90 seconds and will give you a specific, honest recommendation based on your actual situation — including a clear answer if you're not ready yet.
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