What Is Fractional HR? A Straight Answer

Fractional HR is a senior HR practitioner working inside your business on a recurring basis, for a fraction of a full-time schedule, on a monthly retainer.

Not a project. Not a helpline. Not software. A person who knows your managers’ names, your handbook, and which of your locations has the scheduling problem — who happens to be there eight hours a week rather than forty.

That’s the whole definition. The confusion is almost never about what it is. It’s about how it differs from the four other things that sound similar.

How it differs from the alternatives

A PEO becomes a co-employer. They take on payroll, benefits and a share of employment liability, usually at a per-employee-per-month rate. That can be genuinely good — small companies often get benefits pricing they couldn’t get alone. What comes attached is a service model built for scale: a helpline, a ticket queue, a representative covering many companies. Fractional HR isn’t a co-employer and doesn’t place your benefits. It’s the strategic layer, and it often sits alongside a PEO rather than instead of one.

An HR consultant is usually engaged for a defined project — a handbook rewrite, a compensation study, an investigation. Scope, deliverable, end date. Fractional is ongoing and embedded; the value is in continuity, which a project by definition doesn’t have.

Outsourced HR administration handles transactions: onboarding paperwork, benefits enrolment, records. Useful, necessary, and not the same thing. It executes decisions. It doesn’t make them.

HR software is a system of record. It will tell you who’s on leave. It won’t tell you whether terminating them is lawful.

The honest summary: fractional HR is the judgment layer. Most companies under 150 people need some of every category, and the mistake is assuming one of them covers the others.

What it looks like week to week

Less dramatic than the category name suggests.

A manager needs a script before a difficult conversation. Someone’s leave request touches three overlapping entitlements and nobody’s sure which applies. A remote hire in a new state has triggered obligations nobody checked. Your handbook is eighteen months stale. Two people have raised the same complaint about the same manager and nobody has connected them.

None of those are projects. All of them are urgent to somebody, and none takes forty hours a week.

That awkward quantity — too much to absorb, not enough to hire for — is why the model exists at all. See embedded fractional HR for the full scope of what that covers.

When it fits

Roughly 15 to 150 employees. Below 15 the volume usually doesn’t justify it. Above 150 you’re generally approaching a genuine full-time need.
You’ve crossed a threshold without noticing. Title VII, the ADA and the Pregnant Workers Fairness Act arrive at 15 employees; FMLA and the ACA employer mandate at 50.
You’ve hired in a second state. One remote employee can trigger leave, pay and notice obligations that have nothing to do with where you’re headquartered — see multi-state compliance.
HR has landed on someone who has another job. Usually the founder, the COO or the controller.
You have HR administration covered but no senior depth. Common past 85 people, and not an absence of HR so much as nobody to ask when something hard lands.

When it doesn’t

Worth saying, since most articles on this subject are written by people selling it.

Under about 10 employees with no multi-state exposure, a good payroll provider and an annual handbook review is often genuinely enough.
When the volume needs someone present. Past 150, or earlier in operationally complex businesses, the day-to-day work requires a full-time person and no efficiency changes that.
When you need one specific thing. A single compensation study is a consulting project. Buy a consulting project.
When what you actually need is an employment attorney. Anything already threatened as a claim, anything alleging discrimination or harassment, restrictive covenants. A fractional partner should tell you this in the first hour rather than the third week.

What it costs

A TrueCollab retainer runs $2,000 to $6,500 a month depending on scope. A full-time HR manager costs roughly $197,000 fully loaded — $147,200 base per Salary.com, plus payroll taxes and benefits.

The arithmetic, and the reasons that comparison is less straightforward than it looks, are in fractional HR vs full-time HR.

What to look for

Ask what they won’t do. A firm that can’t name the edge of its competence hasn’t found it yet. Investigations into discrimination or harassment complaints, restrictive covenants, and anything in active dispute belong with counsel, and you should hear that unprompted.

Ask about the exit. Notice period, and whether they’ll help you hire your own HR leader when the time comes. A partner who avoids that conversation is optimising for their retention, not yours.

Ask whether they’ve worked in your world. An hourly, multi-location, shift-based workforce generates completely different problems from a salaried exempt one. A handbook built for a software company will not survive contact with a Saturday shift.

Ask what happens in week one. “Discovery” for a month is a reasonable answer only if you’re paying for a month of discovery.

Common questions

Is fractional HR just a consultant with a subscription?

The difference is embeddedness. A consultant arrives, delivers, leaves. A fractional partner is in your business continuously, which means they know the context when something urgent lands — and context is most of the value when a manager calls at 4pm on a Friday.

Can we use fractional HR alongside a PEO?

Frequently, and it’s one of the more common arrangements. The PEO handles payroll, benefits and co-employment; the fractional partner handles the strategy and the situations a helpline can’t. See benefits and PEO support.

How quickly does it start working?

Within the first month for anything tactical — a stalled hire, a leave question, a manager who needs help this week. Anything structural takes a quarter or more, because handbooks, comp bands and manager capability are not same-week work.

Is our data safe with an outside partner?

Ask specifically: where records are held, who has access, what happens at the end of the engagement, and whether they carry professional liability insurance. Any competent firm will answer all four without hesitating.

What happens when we outgrow it?

You hire. A good partner helps you define the role, sits in on interviews, and hands over a function that already works rather than a blank page.

Sources: Salary.com national average for Human Resources Manager; US Bureau of Labor Statistics. Federal headcount thresholds per Title VII, the ADA, the PWFA, FMLA and the ACA employer mandate.