When to Hire Your First HR Person at a Startup

Most startups should have someone owning people ops by about 20 employees, and a real HR role by about 40. In the US, federal laws against discrimination based on race, color, religion, sex, national origin, disability, and genetic information apply from 15 employees, age discrimination from 20, and the Family and Medical Leave Act from 50. Many states start far earlier. Headcount is only half the answer, though. The better trigger is the moment people decisions start piling up on the founder and getting made differently each time. And your first HR person doesn't have to be a full-time hire.

Below is what the legal thresholds mean, the signs you're already late, a simple way to map the people decisions you own today, and how to choose between doing it yourself, a fractional Head of People, or a full-time hire. There's a quick checklist near the end.

A founder I work with put it plainly. He told me the reason he brought me in is that he doesn't want to think about this part of the business. If he disagrees with something, he says so. If I believe in it, I push back, and sometimes I concede. Nine times out of ten, he lets me run it. That's what a first HR hire is for, fractional or full-time. It takes a whole category of decisions off the founder's desk and makes sure they get made the same way every time.

How many employees before you need HR?

There's no official number. Many guides online put it at about 50 employees, and others say there is no hard rule at all.

The one benchmark with real data behind it is the HR-to-employee ratio. Bloomberg Law's HR Department Benchmarks and Analysis 2018 found a median of 1.5 full-time HR staff for every 100 workers, the highest level in the survey's 40-year history. That figure is from 2018 and covers companies of every size, so treat it as a rough guide rather than a rule.

Here's what that ratio means for a growing company.

• At 20 employees, 1.5 per 100 works out to 0.3 of a full-time HR person, or about a day and a half a week.
• At 45 employees, it's about 0.7, or roughly three and a half days a week.
• At 70 employees, it's about 1.05, so one full-time person.

By the ratio alone, a company under about 65 people needs part of an HR person, not a whole one. That's the gap fractional HR was built to fill.

What employment laws kick in at 15, 20, and 50 employees?

If you're in the US, federal coverage changes at a few clear points. According to the EEOC, these apply by headcount.

• From 1 employee, the equal pay law applies, so men and women doing equal work must get equal pay.
• From 15 employees, the laws against discrimination based on race, color, religion, sex, national origin, disability, and genetic information apply.
• From 20 employees, protection against age discrimination for workers 40 and older applies.

The count works differently than most founders expect. The EEOC counts part-time, seasonal, and temporary staff, leaves out owners and contractors, and requires you to hit the number on every workday for at least 20 weeks in the current or previous year.

According to the Department of Labor, private employers with 50 or more employees in 20 or more workweeks in the current or previous calendar year are covered by the Family and Medical Leave Act. An employee qualifies once they've worked for you at least 12 months, logged at least 1,250 hours in the 12 months before leave, and work at a site with at least 50 employees within 75 miles.

State law often reaches you well before federal law does. In California, the Civil Rights Department says the ban on employment discrimination applies once you have five employees, harassment is prohibited even with one, and employers with five or more must give supervisors at least two hours of sexual harassment training. In New York, the Attorney General notes that employees can bring a discrimination complaint against an employer of any size under the State Human Rights Law, and New York City's law covers employers with more than four.

So if you have people in California or New York, the 15-person line means very little. Check the rules in every state where someone works for you, and remember that with remote hiring that list can grow with each new hire. I'm not a lawyer, and this isn't legal advice. What these thresholds tell you is when inconsistent people decisions start carrying legal risk on top of the cultural cost.

If your team is spread across countries, each one brings its own rules. I've worked in HR across the US, New Zealand, Australia, the UK, and the Philippines, and the threshold questions look different in every one of them.

What are the signs your startup needs HR now?

Headcount tells you roughly when, but these tell you that you're already late.

• The same question gets a different answer depending on who asks. Time off, remote days, a title change.
• Managers run one-on-ones as status updates. I see this all the time in survey comments, where people say their one-on-one feels like going through the motions. A status update is an email. A one-on-one is where you help someone who's stuck, build the relationship, or challenge them.
• Hiring is ad hoc. Every manager interviews differently, and onboarding depends on who's free that week.
• The founder is the escalation point for every people issue, and those issues wait days for an answer.
• Someone good quits, and you didn't see it coming. If that's happened, start with these stay interview questions before the next resignation.
• Morale dipped, and nobody owns fixing it. How to fix low morale at a small company walks through where to start.

How do you map your people decisions before you hire?

Before you automate or restructure anything, map the decisions, the exceptions, and the handoffs, not only the tasks. The same goes for your first HR hire. A job description built from a task list gets you an administrator. One built from a decision map gets you the person you need.

Take an hour and do this.

1. Decisions. Write down every people decision made in the last 90 days. Hires, offers, promotions, exits, leave requests, policy questions, performance conversations.
2. Owners. Mark who made each one. You, a manager, or nobody.
3. Exceptions. Circle the one-offs, where one person got a yes that someone else would have got a no.
4. Handoffs. Note where a decision passed between people and stalled, like an offer waiting on your sign-off or a leave request nobody answered.
5. Thresholds. Mark which of the legal thresholds above you've crossed or will cross in the next 12 months.

If the list is short and you're under 15 people, you probably don't need anyone yet. If it's long, full of exceptions, and you've crossed 15 or 20, you're overdue. The exceptions column is where inconsistency and legal risk both live, so that's what your first HR person should fix first.

Should your first HR hire be full-time or fractional?

You have three realistic options.

Founder plus tools

This fits very small teams with a short decision list. You handle it with a payroll and HR platform, a simple handbook, and an employment lawyer you can call. The risk is that it can start to eat into your week.

Fractional or interim Head of People

This fits earlier than most founders think, often before 15 people if the decision list is already long or you've crossed a state threshold. A senior person works with you a set number of days a month, builds the basics (policies, manager habits, onboarding, a feedback rhythm), and hands them over. It matches the ratio math above, where you need part of a person. Interim works when you're between people leaders, or when you plan to hire full-time and want the foundation in place first.

Fractional can also stretch further than the ratio suggests. Pair a fractional Head of People with a junior HR coordinator, and the senior person sets direction while the junior handles the day-to-day, which can carry a much bigger team. My own rule of thumb is that by about 20 people, someone should own people ops. That means the legal basics, the processes, the HRIS, and how the company communicates. By about 40, it should be a real role, whether that's fractional, fractional plus junior support, or a full-time hire. That comes from doing this work, not from a benchmark.

Full-time hire

This fits when the ratio points to a whole person, or when hiring volume alone fills a week. Hire for the stage you're in. A first HR hire at 50 people has to build from nothing, which is a very different job from running an established team.

The companies I most enjoy working with are globally dispersed. People in different countries and cultures working together every day, which 10 or 20 years ago mostly wouldn't have happened. It changes how you set up people ops and communication, and now there's AI in the mix too. If that sounds like you, here's how our People Ops Consulting works. And if your main worry is engagement, this breakdown of what an engagement consultant does will help you decide what kind of help to bring in.

What should your first HR person fix first?

The foundation. Feedback and engagement matter, but they come later. Start here.

• Fix legal exposure. Run the decision map with the founder, check that policies are correct for every state and country you have people in, and fix anything that creates risk.
• Get the PEO or EOR working for you. If you use a professional employer organization or an employer of record, check what it covers, what it doesn't, and who owns the handoffs between it and your team.
• Set up the HRIS. One place for employee records, time off, and documents, so answers stop living in the founder's inbox.
• Standardize the core processes. One way to hire, onboard, handle leave, manage performance, terminate, and offboard, written down and followed. Performance and terminations matter most, because those are the decisions most likely to end up in front of a lawyer.
• Write down the answers to the questions people keep asking, so everyone gets the same one.

Once that's solid, move on to what people feel day to day, like one-on-ones with substance, a way to give honest feedback without worrying about what happens next, and later an engagement survey. The goal is that the founder can stop thinking about people ops day to day, while still pushing back when he or she disagrees.

Is it time to hire HR? A quick checklist

Tick any that apply.

• You have 15 or more employees, or will within 12 months.
• You have people in more than one US state or more than one country.
• Your decision map has more than a few exceptions from the last quarter.
• Managers haven't been shown how to run one-on-ones, give feedback or handle a complaint.
• Someone you wanted to keep left in the last six months.
• You, the founder, spend more than a few hours a week on people issues.
• Nobody owns onboarding.

Two or three ticks, start with a fractional Head of People. Four or more, plus a team heading toward 50, plan the full-time hire and get help building the foundation first.

If you want a second pair of eyes on your decision map, Book a Strategy Call and we'll go through it together.

Frequently asked questions

When should a startup hire its first HR person?

Have someone owning people ops by about 20 employees, and a real HR role by about 40. Move sooner if people decisions are piling up on the founder or being made inconsistently, or once you cross a federal or state legal threshold.

How many HR staff should a company have per employee?

A 2018 Bloomberg Law benchmark found a median of 1.5 full-time HR staff per 100 employees. For most companies under about 65 people, that means part of one HR person rather than a full-time hire.

What employment laws apply at 15 employees?

In the US, federal laws against discrimination based on race, color, religion, sex, national origin, disability and genetic information apply from 15 employees, according to the EEOC. Many states start earlier. California's ban applies from five employees, and New York's covers employers of any size.

What is a fractional Head of People?

A senior HR leader who works with you part-time, often a set number of days a month. They build the basics, like policies, manager habits and onboarding, without you hiring a full-time executive.

Should my first HR hire be a generalist or a specialist?

A generalist. Your first HR person needs to cover hiring, policy, manager support and employee relations. Specialists make sense once there's an HR team to add them to.

Sources

• Do the federal employment discrimination laws enforced by EEOC apply to my business? U.S. Equal Employment Opportunity Commission.
• Family and Medical Leave Act U.S. Department of Labor, Wage and Hour Division.
• Bloomberg Law, HR Workforce Continues to Grow, Staffing Ratios Reach All-Time High (HR Department Benchmarks and Analysis 2018) Bloomberg Law press release, June 2018.
• How do you count the number of employees an employer has? U.S. Equal Employment Opportunity Commission.
• Employment Discrimination California Civil Rights Department.
• Workplace Discrimination and Harassment New York State Office of the Attorney General.