When Should a Startup Make Its First HR Hire? A Practitioner's Honest Answer

This is one of the most common questions I get from founders, and the honest answer is almost always: sooner than you think, and differently than you're imagining.

Most founders frame this question around headcount. At what number of employees does HR become necessary? They've heard 50. They've heard 100. Some ambitious Googling has produced a range of benchmarks that ultimately don't tell them much.

Here's the problem with the headcount framing: it's not wrong, but it misses the point. The question isn't how many people do I have? The question is what's actually happening with my people right now, and who is handling it?

What "No HR" Actually Looks Like

In most early-stage startups, HR doesn't not exist. It exists—it's just distributed across people who didn't sign up for it.

The founder is making compensation decisions on the fly during offer calls. The executive assistant is handling onboarding paperwork and benefits questions. The most senior technical person is dealing with team conflict because someone has to. And nobody is thinking about performance management until someone clearly isn't working out and suddenly you have a situation on your hands.

That system works—right up until it doesn't. And the point at which it stops working is rarely predictable. It tends to show up suddenly: a difficult termination, a harassment complaint, a key person quitting because something was handled badly, a raise that accidentally created a compression problem across half the team.

The companies that handle these moments well aren't the ones who hired HR at exactly the right headcount. They're the ones who had some infrastructure in place before the moment arrived.

The Signals That Actually Matter

Rather than a headcount threshold, I'd tell founders to watch for these signals. Any one of them is worth paying attention to. More than one is a clear indicator that you need dedicated HR support of some kind.

HR work is consistently landing on the founder's desk—and pulling them away from building the company. If you're spending more than a few hours a week on people issues, something has to change. Either those issues go away (they won't) or someone else handles them (they should).

You've had a situation that felt messy or unresolved. A difficult employee conversation that didn't go anywhere. A termination that felt reactive. A complaint that you weren't sure how to handle. These are signals that you don't have the process or the expertise to manage people issues at the level your company requires.

You're hiring at a pace that outstrips your ability to onboard people well. Fast growth without HR infrastructure creates culture problems that compound quickly. Every person you bring on without a real onboarding experience is starting with less context, less connection, and less clarity about what good looks like at your company.

You have managers who aren't managing. In most early-stage companies, the first people leaders are individual contributors who got promoted because they were great at their jobs—not because they knew how to lead people. Without coaching and support, they default to whatever instincts they have, which is often not enough. Someone needs to be developing your managers. That work is almost always HR's.

You're preparing for a fundraise or an acquisition. Investors do HR diligence. Acquirers do HR diligence. If you're approaching either of those situations without clean people operations, you will find out in a way that is uncomfortable and potentially expensive.

What Kind of HR Hire Makes Sense

This is where most founders make the second mistake—assuming that an "HR hire" means one thing.

It doesn't. There's a wide range of what you might actually be solving for, and the right answer depends on where you are.

What you need if you're under 25 people: You almost certainly don't need a full-time HR person yet. What you need is access to senior HR thinking—someone who can help you get the fundamentals right, navigate situations when they come up, and build the infrastructure you'll need as you grow. This is where fractional HR works extremely well. You're not paying for 40 hours a week of HR work you don't have. You're accessing the judgment and experience you need at the volume that's appropriate for your stage.

What you need if you're 25–75 people: This is the zone where a lot of companies find themselves at a genuine inflection point—and where fractional HR often continues to be the right answer. The volume of HR work is growing, but you may not yet have enough to justify a full-time senior HR leader. Many companies at this stage run a combination well: an HR coordinator or generalist to handle the day-to-day operational work, with a fractional HR leader providing the strategic direction. Others stay fully fractional through this entire range. The right call depends more on what you're navigating than on headcount alone.

What you need if you're 75–100+ people: At this size, the calculus starts to shift. Some companies are still well-served by fractional HR, particularly if their HR needs are project-heavy or episodic rather than constant. Others find they've crossed a threshold where someone embedded and full-time makes more sense—usually when the volume of employee relations work, manager coaching, and operational HR is consistent enough to fill a role. If you're in this range and unsure which side of that line you're on, that's worth thinking through carefully before making a full-time hire you're not ready for.

The thing I'd push back on most is the instinct to hire an HR coordinator or administrator as a first HR hire. That person can do the transactional work. What they can't do is the strategic thinking your company actually needs at this stage. If you're going to make one HR hire, make it at a level that actually moves the needle and can set up the foundation of the function.

The Most Expensive Version of This Decision

There are two ways founders get this decision wrong.

The first is waiting too long—which I've already covered. By the time HR becomes obviously necessary, you're usually already managing the consequences of not having it.

The second is hiring too fast without the right fit. I've watched founders, spooked by a difficult situation, make a reactive HR hire—someone who looked good on paper, interviewed well, and turned out not to be the right fit for an early-stage environment. Exiting that hire is expensive, and you're right back to where you started, just with less time and less money.

The best HR hire for an early-stage startup is someone who has built before, who is comfortable with ambiguity, who can operate without a team beneath them, and who will tell you what you need to hear rather than what you want to hear. That's a specific profile. It's worth taking the time to find it.

The Bottom Line

There's no magic headcount number. There's a set of signals that tell you your people function needs more attention than it's getting—and the earlier you act on those signals, the more choices you have about how to address them.

If you're waiting until HR feels obviously necessary, you've already waited too long.

Not sure whether your startup needs dedicated HR support right now—and what kind? I offer free consultations and can help you think through what actually makes sense for your stage. Book time with me here.