If you've searched this question and gotten a range so wide it was useless, you're not imagining things. Fractional HR costs anywhere from $1,500 to $16,000 a month—and that range is so wide because "fractional HR" isn't just one thing.

Most founders who ask about a fractional CHRO are actually picturing something else entirely—someone to handle the HR paperwork, run recruiting, maybe deal with a difficult employee situation. That's not a CHRO. Here's what the role actually involves, and how to know whether it's what your startup needs right now.

Most founders frame this question around headcount. At what number of employees does HR become necessary? Here's the problem with that framing: it misses the point entirely. The question isn't how many people do I have—it's what's actually happening with my people right now, and who is handling it?

Fractional HR isn't right for every company. But some companies need it badly and don't know it yet—and others think they need it when what they actually need is something different entirely.

After nearly six years as a solo fractional HR practitioner working exclusively with startups and small businesses, I've had a lot of first conversations with founders who are trying to figure out exactly that. Here's the honest version of how I think about it.

Hiring a fractional HR executive isn't like hiring any other fractional leader. Here's what to consider before you bring one on—from a practitioner who has been doing this work for nearly six years.

The most common definition of fractional HR gets it wrong. Search the term and you'll find article after article calling it "part-time HR support." That's not wrong, exactly — but it flattens something that's a lot more nuanced, and it leaves out the details that matter most when you're deciding whether this model is right for your company. Here's the version from someone who's actually been doing it for six years.

What HR actually is at the early stage: the architecture of how your company operates as a human system. Who you hire, how you onboard them, what behaviors you reward, how you handle the first hard conversation, what happens when your third employee underperforms. These decisions don't wait until you have a hundred people. They happen on day fifteen.

And when there's no framework for them, founders make them reactively—case by case, often inconsistently, sometimes in ways that create legal exposure or cultural debt that compounds over time.

A company triples its headcount in 18 months, raises a Series B, and suddenly the culture that made people want to work there is gone. Managers who were great individual contributors are drowning. Compliance gaps have been quietly compounding for two years. The founder is still making every people decision because there's no infrastructure to catch any of it.

That's not a hiring problem. That's a People operations problem.

Here's what a fractional HR leader actually does to help you scale:

If you're a 25-person Series A company, you don't need someone who's an expert at managing HR bureaucracy at scale. You need someone who knows what it looks like to build from scratch—who's written a first employee handbook, set up a first performance review cycle, and navigated a first difficult termination at a company without an established HR infrastructure.

Rather than hiring full-time executives, companies are increasingly turning to fractional HR leaders. A fractional HR leader is someone a company engages in a part-time, interim capacity and for a “fraction” of what it would cost to hire a full-time executive. Fractional leaders are experts in their fields and typically have led their respective functions in past positions.