Outsourced HR vs Fractional HR: What's the Difference and Which Do You Need?
These two terms get used interchangeably, which is a problem — because they're fundamentally different things solving fundamentally different problems. Choosing the wrong one doesn't just waste money. It leaves gaps you won't notice until something goes wrong.
I've worked on both sides of this. I've been the in-house HR leader that outsourced providers reported into, and I now work as a fractional Head of People with businesses across the UK. So I'm not neutral, but I am honest — and the honest answer is that both models have a place. The question is which place is yours.
What outsourced HR actually is
Outsourced HR is a service. You pay a monthly fee — typically somewhere between £100 and £500 a month depending on headcount and provider — and in return you get access to some combination of employment law advice, template policies, contract generation, and usually an advice line you can call when something crops up.
Some providers bundle in tribunal insurance, which covers your legal costs if a claim is brought against you, provided you followed their advice. Some offer an online portal where your managers can access documents and guides. Some assign you a named advisor, others route you to whoever's available.
The model works well for what it's designed for. If you're a business with under thirty employees, your HR needs are primarily administrative and compliance-based, and your main concern is having a safety net when things go wrong — outsourced HR is a perfectly sensible option. It's affordable, it reduces your exposure, and it means you're not relying on Google and guesswork when a disciplinary situation lands.
Peninsula, Citation, Croner, BrightHR — the market is well established. There's nothing wrong with these businesses. They serve a real need.
Where outsourced HR stops working
The limitation isn't quality. It's scope.
Outsourced HR is reactive by design. You ring when you've got a problem. Someone tells you what to do. You hang up and do it. That interaction is useful in the moment, but nobody on the other end of that phone is thinking about your business between calls. Nobody's asking why you've had three grievances in six months, or why your retention in one department is twice the rate of every other team, or whether your pay structure is creating risks you can't see yet.
The advice you get is also, by necessity, conservative. Outsourced providers carry risk — particularly those offering tribunal insurance — so their guidance tends towards the safest possible option rather than the most commercially sensible one. That's not a criticism. It's the economics of the model. But it means you're sometimes making decisions that protect the provider's exposure rather than serve your business.
And the relationship is transactional. Your advisor doesn't know your culture, your management team's strengths and weaknesses, your commercial pressures, or your growth plans. They know what you tell them in a fifteen-minute phone call, and they advise accordingly. Again — fine for straightforward compliance questions. Less fine when the situation is nuanced, political, or strategic.
What fractional HR actually is
A fractional Head of People — or fractional HR Director, fractional People Director, whatever language fits — is a senior HR leader who works with your business on a retained, ongoing basis, typically one to four days a month.
The difference isn't just time allocation. It's orientation.
A fractional HR leader operates as part of your leadership team. They attend your leadership meetings, or at least the ones that matter. They know your people by name — or at least the ones whose situations are live. They understand your commercial context, your sector pressures, your growth plans, and your culture. They're not waiting for you to call with a problem. They're identifying problems before you've noticed them and building the foundations that stop them recurring.
The work spans strategic and operational. Policy and compliance, yes — but also people strategy, management development, organisational design, retention, pay architecture, culture, and the kind of difficult conversations that founders and MDs tend to avoid until they become expensive.
It's not a service. It's a relationship. And that distinction matters more than most people realise until they've experienced both.
The comparison that actually matters
Forget features and pricing for a moment. The real question is this: what kind of problem are you trying to solve?
If your problem is compliance exposure — you need contracts checked, policies in place, and someone to call when a situation arises — outsourced HR solves that. Efficiently and affordably.
If your problem is people leadership — you're growing, your managers aren't keeping pace, your retention's suffering, your culture's shifting, or you know that the way you've been doing things won't carry you through the next stage — outsourced HR doesn't solve that. It was never designed to. You need someone thinking about your people with the same seriousness that your FD thinks about your finances.
That's what fractional HR is for.
Cost comparison
Outsourced HR: £100-500/month. You're buying a product.
Fractional Head of People: £1,500-3,000/month. You're buying leadership.
Full-time Head of People: £60-90k salary plus pension, benefits, and a headcount slot. Call it £80-120k fully loaded.
The fractional model sits in the middle — deliberately. It gives growing businesses access to senior HR capability at roughly a quarter of the cost of hiring, without the limitations of outsourced compliance support.
Can you use both?
Yes. And sometimes that's the right answer.
A fractional Head of People provides the strategic thinking, management development, and senior advisory. An outsourced provider handles the day-to-day administration, document generation, and advice line queries. The fractional leader sets the direction. The outsourced provider supports the execution.
I've worked alongside outsourced providers in several businesses and it can be a very effective combination — provided the outsourced provider is willing to take direction rather than operate in isolation. Not all of them are, so it's worth checking.
How to decide
Be honest about where your business actually is.
If your people challenges are mostly administrative and you sleep fine at night, outsourced HR is probably right. Get a good provider, make sure your managers know how to use the advice line, and focus your energy elsewhere.
If you're lying awake thinking about retention, or management capability, or how to scale without losing what made the business work in the first place — that's a different conversation. That's the one where fractional HR earns its keep.
And if you're not sure, that's fine too. A good fractional HR leader will tell you honestly whether you need them or not. If they can't do that, they're probably not the right one.
Worth a conversation?
I work with businesses across the UK as a fractional Head of People and HR advisor. If you're trying to work out which model fits, I'm happy to talk it through — no pitch, no obligation. Just an honest conversation about where you are.