Key takeaways
- Most companies feel the need for dedicated HR somewhere between 25 and 75 employees, or at their first multi-state hire.
- A PEO or fractional HR advisor can bridge the gap before a full-time hire.
- The first HR hire should fix compliance and payroll basics before launching culture programs.
- HR reports best to the CEO or a senior operating leader who can back its decisions.
- Add specialists, such as recruiting or benefits, only when the work volume justifies them.
An HR department is the team responsible for an organization's people practices, including hiring, pay and benefits, compliance, employee relations, performance, and development. In a growing company it usually starts as one person and expands into specialist roles as headcount and complexity increase.
The founders of a 45-person logistics startup have been splitting HR between them for three years. One runs payroll at midnight twice a month. The other handles every employee question, from benefits to a harassment complaint she had no idea how to investigate. Hiring takes forever. Nobody has looked at the handbook since the company had 12 people.
They finally decide to hire HR, and immediately hit the next question: what kind of HR person, and what should they do first? This guide answers both, and maps how the function grows from one person to a team.
When it's time for dedicated HR
There's no magic number, but the signals are consistent. Founders or office managers spend more than a day a week on HR tasks. You have employees in more than one state. You are approaching 50 employees, where FMLA and the ACA employer mandate apply. You have had an employee relations issue you didn't know how to handle. Hiring is slowing growth. Or employees are asking questions about pay, promotions, and policies that nobody can answer consistently.
Many companies feel these pressures somewhere between 25 and 75 employees. Earlier if the workforce is spread across states or includes large hourly teams. Later if the company uses a PEO that absorbs much of the administrative work.
Your options before and instead of a full-time hire
| Option | What you get | Best for |
|---|---|---|
| PEO | Payroll, benefits, workers' compensation, and HR advisors bundled | Small teams without HR staff, especially those needing better benefits |
| Fractional HR | An experienced HR leader for a set number of hours each month | Companies that need judgment and policies more than daily administration |
| HR outsourcing or advisory service | On-demand advice and document templates | Very small companies with occasional questions |
| First full-time HR hire | Someone in the building owning the function every day | Companies with steady hiring, multiple states, or frequent employee issues |
These options combine well. A company might use a PEO for payroll and benefits and hire a full-time HR generalist to handle employee relations and hiring.
Who to hire first: generalist, manager, or leader
Most companies make one of three choices for the first HR hire, and each one fits a different situation.
An HR generalist handles the day-to-day: onboarding, benefits questions, payroll changes, policy questions, and records. This works well when the founders or an operations leader can set HR strategy, and the main need is getting work done reliably.
An HR manager can both do the work and build the program: policies, handbook, compliance, performance process, and some employee relations. This is the most common first hire for companies between about 50 and 150 employees.
A head of people sets strategy and builds the team, and often isn't the right first hire unless the company is growing fast toward several hundred employees, because senior leaders tend to get frustrated doing all the administrative work themselves.
Whoever you hire, look for someone comfortable with ambiguity and hands-on work, with experience in a company of similar size. An HR director from a 10,000-person company often struggles without the systems and specialists they are used to.
The first 90 days for a first HR hire
The first HR person should fix the foundations before launching culture programs. A practical order:
- Days 1 to 30, audit and stabilize. Review payroll and tax registrations in every state, worker classification, I-9 forms, benefits compliance, posters, and the handbook. Meet every leader and a cross-section of employees. List every HR tool and its cost.
- Days 31 to 60, fix the biggest risks. Correct classification problems, complete missing I-9s, update the handbook, set up a complaint process, and make sure payroll and benefits are accurate.
- Days 61 to 90, build the basics. Standardize onboarding and offboarding, set up an HRIS if there isn't one, and agree on the next six months of priorities with leadership, such as hiring, a performance process, or pay bands.
Our small business compliance guide is a good audit checklist for the first month.
Where HR should report
HR works best reporting to the CEO or to a senior operating leader, such as the COO, who can back its decisions. HR deals with sensitive issues involving managers and sometimes executives, and it needs enough standing to raise uncomfortable concerns. Reporting HR to finance is common in small companies and can work, but it tends to tilt HR toward cost control and administration rather than people strategy.
Whatever the line, the head of HR should have regular access to the CEO and be part of leadership discussions about growth, structure, and culture.
How the HR team grows
As the company grows, HR typically adds roles in roughly this order, depending on where the pain is greatest.
- Recruiter or talent acquisition partner, when hiring volume overwhelms the generalist. This is often the first specialist.
- HR coordinator, to take administrative work off the senior HR person.
- Payroll and benefits specialist, when payroll and benefits complexity grow, often with multiple states.
- HR business partners, who support specific departments as the company passes a few hundred employees.
- Specialists in compensation, learning, HR systems, and people analytics, as the company grows larger.
Add specialists when the work volume justifies a full-time role, not before. Outsourcing or software can often fill the gap in the meantime.
Budgeting for HR
An HR budget covers people, technology, and programs. Technology often includes an HRIS with payroll, an ATS, and possibly performance and engagement tools. Programs include recruiting costs, training, benefits broker fees, and legal advice. Ask for a modest legal budget from the start. A few hours of employment counsel at the right moment costs far less than a claim.
Track HR spending per employee over time, and connect requests to business outcomes, such as faster hiring for a growth plan or lower turnover in a high-cost role.
HR systems to put in place early
Every growing company eventually needs a reliable system of record for employee data, payroll that files taxes in every state, an onboarding process with electronic paperwork, and an applicant tracking system. Choosing these well early avoids painful migrations later. Our HR tech stack guide explains what to buy at each stage, and our HRIS buyer guide and Rippling vs BambooHR comparison are good starting points.
Mistakes companies make building HR
Hiring too senior too early is the most common one. A director-level leader brought into a 40-person company often spends most of the week on payroll corrections and benefits questions, gets frustrated, and leaves within a year. The opposite mistake, hiring a very junior coordinator and expecting them to handle a harassment investigation or a layoff, is just as costly.
The other frequent mistakes: treating HR as purely administrative and leaving it out of leadership discussions, buying several disconnected tools before settling on a system of record, and expecting one person to fix years of compliance gaps in a month. Give the first HR hire a clear mandate, a modest budget, and real access to leadership.
Building trust as the first HR person
Employees often meet the first HR hire with suspicion, especially if they have never had HR before. Some assume HR exists to protect the company against them. The fastest way to earn trust is to be useful: fix payroll problems quickly, answer questions clearly, explain the reasons behind policies, and handle complaints fairly and confidentially. Be honest about what HR can and can't keep confidential. Over time, a fair, consistent HR function becomes one of the reasons people stay.
First 90 days in HR checklist
Work through this list with your team. The printable PDF version has space to tick each item off.
- Meet every leader and a cross-section of employees
- Review payroll and tax registrations in every state
- Audit worker classification for every role
- Audit Form I-9 records
- Confirm benefits compliance, including COBRA and ACA where applicable
- Check posters and electronic notices
- Review and update the handbook
- Set up a harassment complaint process
- List every HR tool, its cost, and its owner
- Standardize onboarding and offboarding checklists
- Choose or confirm the HRIS and payroll system
- Agree on six-month priorities with leadership
- Set a small budget for employment legal advice
Where to go from here
Wherever you are in the process, there is a next step that fits.
Keep reading
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Email templates for this topic
Ready-to-edit emails with subject lines, compliance notes, and a free PDF.
- New hire welcome email templateA warm welcome from the manager a week before day one, with the plan for the first week.
- Policy update announcement email templateAnnounce a new or changed workplace policy with what changed, why, when, and what employees need to do.
- Performance review reminder email templateLaunch the review cycle and remind managers of deadlines, expectations, and fairness checks.
- Resignation acceptance email templateAccept a resignation gracefully, confirm the last day, and explain final pay, benefits, and next steps.
Frequently asked questions
When should a company hire its first HR person?
Should the first HR hire be a generalist or a manager?
Can a PEO replace an HR department?
Who should HR report to?
What should a new HR person do first?
Sources
We checked the facts in this guide against these primary sources. Laws and thresholds change, so confirm current rules before you act.
Written by the HRTally Research Team
Our guides are written and reviewed by people with hands-on US HR, payroll, and HR technology experience. Legal and tax facts are checked against primary sources, such as the Department of Labor, IRS, EEOC, and USCIS, and linked at the end of each guide. Vendors never review or pay for our editorial content.