Should You Hire HR or Outsource HR?

TLDR:

• Outsource first because most growth-stage companies only need an HR professional part of the time and don’t have a 40-hour-a-week demand.
• Hire in-house only when you pass three tests: a true full-time workload, a budget for real seniority and someone senior to manage them.
• Avoid the panic hire. Rushing a junior "HR manager" into the seat, or handing the HR hat to your office manager or COO, buys copy-paste HR and puts one more thing back on your plate.
• A fractional HR partner like Castle HR gives you a dedicated senior HR pro on a month-to-month contract, who builds your systems and coaches your managers until you're ready to hire.

In one line: Castle HR bridges founder-run HR and a senior full-time HR leader by providing a senior HR professional who builds what you need to scale today, so you hire in-house when you're ready, not when you're desperate.

The proof: According to Castle HR's client data, the average Castle client starts at 29.2 employees and is at 53.6 two years later.

Inside this article:

• The 30-second test that tells you whether to hire or outsource, flowchart included
• The panic hire, and why your office manager isn't your HR department
• The $112,500 mistake hiding in your "HR Manager" job post
• What happened to the average 29-person company two years after bringing in Castle HR

Why is the hire-or-outsource question suddenly on your desk?

Founders start asking whether to hire HR or outsource it when the people side of the company crowds out the reason they started it: the calendar fills with people problems, the team wants answers nobody's giving, hiring falls behind the plan, or someone great walks out the door.

Let's talk about what's actually on the line and the bet you made.

You didn't take the risk of starting a company for a busier inbox.

You took it for:

The lake house where the dock faces west, where the loudest notification is a loon.

To watch your daughter's championship game from the front row instead of through text.

The lie-flat seat to Lisbon, where the flight attendant asks if you'd like your champagne.

The ski chalet where the boot room has heated floors, and the heated floors have a concierge.

And for the big day when the wire hits from the sale you spent a decade building toward.

Every one of those depends on a company that grows without you holding every thread. And at growth stage, the threads are people.

And right now, those threads are tangled around your ankles:

• Your calendar has been taken over by 14 "hey, got a sec?" messages before 10 a.m., and every one of them is a 40-minute meeting wearing a five-minute costume.
• Your team wants answers you don't have. "What's my path to senior?" "How are raises decided?" You improvise something reasonable, but it is just a band-aid solution.
• Hiring is becoming time-consuming, as the plan said to hire twelve new people this year. But after interviewing forty, you lost two finalists to companies that sent offers while you were waiting to see “what else is out there.”
• Your best (insert key role) resigns with a gracious note, but by lunch her LinkedIn says "Excited to share…" Now three people on her team quietly updated their profiles.

One CEO described this moment better than we ever could:

"We were in that awkward teenager phase. Big enough to need HR, too small to build a department." — Carlos Midence, CEO, Shoplogix

What makes it maddening is that founders shouldn't have to choose between growing the company and running its HR. Yet that's exactly the choice the people side forces on you, one "got a sec?" at a time.

If this sounds like your week… congratulations, you're at a fork in the road where one path says hire an HR manager, and the other says outsource it.

What happens if you just keep owning HR?

Now count how many "Excited to share…" posts you've seen from former employees this year. The wrong HR call costs a growth-stage company twice: once in salary or fees, and again in growth that stalls while the founder stays stuck doing HR.

You can get it wrong by making a panic hire, or waiting too long and doing it all yourself.

The first problem is that when HR starts to buckle, founders make this decision the way you'd pick a restaurant at 10 p.m. when you're starving: fast, hungry and with terrible judgment.

The panic hire is a people decision made in pain, not with a plan.

A panic “hire” doesn't always mean hiring someone new, because it can simply mean you hand the HR hat to whoever's closest. The office manager who's "good with people," or your COO, who already wears fourteen hats and now balances a fifteenth on top like a circus act.

Both are decisions for HR to be run by whoever's nearest, not whoever's qualified.

It's the same mistake companies make with managers. The UK's Chartered Management Institute found that 82% of new managers step into the role with no formal management training. Good people, thrown in the deep end, figuring it out on your team's time.

Most founders see this as part of the job and decide to "just handle HR for this quarter." Then a quarter becomes a year, and the managers they meant to develop keep underperforming. The systems they meant to build stay on the to-do list, and the growth plan, the one that pays for the lake house, slips away.

Waiting has a price tag too as Gallup estimates that replacing an employee costs between half and twice their annual salary, and 52% of people who quit say their manager or company could have done something to keep them.

Take a second and think of the last great person who resigned. Take their salary and multiply it by somewhere between 0.5 and 2. That's what the gap in your people systems cost you, once. 

How do you decide whether to hire an HR manager or outsource HR?

We've sat with more than 250 growth-stage founders at this exact fork, and this is the simple test we walk them through. 

Follow the arrows with your actual company in mind, not the one in your pitch deck.

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Where did you land?

• Yes to both means hire a senior HR leader. You have the need and can pay for it, so go find someone brilliant.
• No full-time HR job yet, you feel you are missing your targets or going to. This is where you need a fractional HR partner, and exactly the stage Castle HR was built for.
• A full-time job, but not the budget or the boss for a senior leader: bring in a fractional HR partner who will build what you need slower but cheaper than an internal Senior HR hire.
• No full-time job and no growth squeeze: buy hourly advice or a project. Your people side is calm. Keep your money, and call someone when a specific problem shows up.

Already have an HR manager on the team? Run the test for the senior work only. If you land on fractional, you don't replace them, you simply complement them with a Senior HR Pro.

Landed on fractional? Book your HR Escape Plan call → and le’ts have a nice chat.

This was incredibly simple so let's slow down and pressure-test each question, because this is exactly where smart founders talk themselves into the wrong answer.

How do you know if you have a full-time HR job?

You have a full-time HR job when there are 40 hours a week of senior people work, meaning building systems and making judgment calls, not just admin. In Castle HR's experience, most growth-stage companies have plenty of HR pain but nowhere near 40 hours of senior HR work.

This is where founders fool themselves because HR pain can be loud. It feels full-time because it lands on you at the worst possible moments, like a seagull that wants all your fries.

But loud pain doesn’t mean there is a full workload.

Let's start with understanding if you need Senior HR help or not.

Now identify where your challenges are and the kind of work you think you need. 

A full-time Senior HR Pro usually means you have a team of 50+ or are 30+ but are hiring 2-5 people a month consistently.

If that is you, you likely need a Senior HR Professional, if not, the good news is, budget-wise, you probably need Fractional HR.

Can you afford and manage a senior HR leader?

A senior HR leader costs more than most growth-stage founders budget for, and you need someone senior to manage them. When either piece is missing, the "HR manager" job post quietly becomes a junior hire, and the founder ends up managing HR instead of escaping it.

Start with the price tag. Canada's Job Bank puts the median human resources manager in the Toronto region at about $112,500 a year, before benefits. 

This is not the battle-tested leader who has scaled three companies and can smell a toxic manager from the parking lot... they cost a lot more.

So the founder sees the number, does the face you make when the sommelier mentions the price after pouring, and rewrites the job post. "HR Manager" becomes "HR Generalist, 3–5 years."

That's the budget trap, and here's what it tends to produce:

• A 74-question engagement survey launched in month one. The results go into a slide deck that lands in a folder, and no one acts on them.
• An org chart designed for the company you'll be in 2031, complete with a VP of Culture you can't afford.
• Confident answers pasted from a chatbot that sound great and are wrong for your province.
• "Wellness Wednesdays" launched while two of your managers are in a cold war over who owns the roadmap.

It's not their fault, because it's inexperience doing its best with copy-paste HR. At minimum, you've added a direct report who needs your judgment on every hard call. At worst, they move you backwards, and the best people on your team notice before you do.

Then there's the second half of the question: who manages your HR leader? If the honest answer is "me," you didn't remove HR from your plate. You added someone to develop, review, and coach, on top of everything else.

This isn't a knock on early-career HR pros, it just isn’t the role that growth-stage founders need.

What if your growth plan is outrunning your managers?

If your growth plan is outrunning your managers, you need senior HR help now, whether or not you have a full-time HR job. Managers and systems are what turn a growth plan into hit targets, and they take an experienced hand to build.

Picture your company as a house and you started with a cosy two-bedroom cottage: five people, one kitchen table, every decision made over coffee. Now your plan says add three floors this year.

Your managers are the load-bearing walls. Your people systems (hiring, onboarding, performance, career paths) are the frame. You can't stack floors on drywall and good intentions. Somebody has to reinforce the structure while you build, without evacuating the house.

This is where a senior builder who shows up regularly, knows the blueprint and makes sure every floor holds is invaluable.

A fractional HR partner is not a template library or an advice hotline. A senior HR professional who works inside your business part-time and does three things:

1. Learns the blueprint. Your revenue targets, the teams you're adding, the leaders you'll need in 18 months.
2. Builds the frame. People systems designed for your company, installed in focused sprints, not copied from someone else's.
3. Strengthens the walls. Coaches your managers until they're difference makers: people who set expectations, give feedback and solve problems without walking them into your office.

This is the part of HR that moves revenue, and the research backs it. 

Gallup finds that managers account for 70% of the variance in team engagement, and its meta-analysis of more than 183,000 business units found that teams in the top quartile of engagement are 23% more profitable than those in the bottom quartile. 

Your managers have the biggest impact on your profit margin.

A junior hire, or a COO wearing one more hat, hasn't built it before and you’re paying for them to learn in more ways than one.

At what size should a company hire its first HR person?

There's no magic headcount for when a company needs to invest in HR, but HR help usually pays serious dividends between 20 and 30 employees. Castle HR sees HR start taking over founders' calendars once a team crosses about 20 people, and the average Castle client signs at 29.2 employees.

Why 29.2? Because founders keep going, thinking they can just do what got them here, but that's when the kitchen-table company stops working. What got you here won’t get you there is a classic business lesson. You now have managers who've never managed, you are no longer hiring "a friend of a friend," and everything is still falling on your plate. 

But "we need HR help" and "we need a full-time HR leader" are two different moments, often years apart. Here's how they usually stack up:

Headcount is the clue as a 25-person company doubling this year may need more senior HR help than a 60-person company holding steady.

So what happens after companies bring in help at that stage? According to Castle HR's client data, the average client starts with 29.2 employees and reaches 53.6 two years later. 

Some clients more than doubled while others held headcount steady and became far more profitable instead, getting leaner and meaner rather than simply bigger. Either way, they grew without making a panic hire.

What does life look like once you make the right call?

Once the right HR model is in place, the founder stops being the bottleneck and becomes the builder again. Managers handle their teams, the people systems run without you, and your time goes back to growth and to the life you started the company for.

A founder who stood at this exact fork

In December 2023, Shoplogix, a Canadian software company, stood exactly at this fork. It had 35 people and a CEO, Carlos Midence, handling recruiting, onboarding, benefits, employee relations and manager questions himself, while expanding internationally.

Instead of proposing to a full-time hire, Shoplogix brought in Castle HR. Kathryn Edwards, a dedicated senior HR professional, met Carlos weekly, coached his managers and built the people systems around the company's growth goals. Two and a half years later, Shoplogix had grown to 70 people and more than doubled its revenue, and Castle HR's work had grown into leadership succession and acquisition-related HR, all without an internal HR department.

"Two and a half years in, HR just isn't something I worry about anymore." — Carlos Midence, CEO, Shoplogix

Now imagine your own company a year from now.

Your one-on-ones are different now because managers walk in with solutions, not escalations. "I handled it" has quietly become the most common phrase in your company, and you didn't even notice.

And then the good part.

You're on the dock at golden hour, phone face-down on the cedar, watching the loon do absolutely nothing urgent. You're in the front row at the championship game, and you see the winning goal with your own eyes instead of a replay in a group chat. You're in seat 2A to Lisbon, deciding between the champagne and the second champagne.

And if your company is ready for a full-time HR leader by then? Even better.

That's the shift this decision buys you: from you being the bottleneck everyone waits on to the brilliant leader everyone follows.

Are you ready for that future? Book your HR Escape Plan call → and let’s talk about your goals and how to get you there.

Why do growth-stage founders choose Castle HR as the bridge?

Growth-stage founders choose Castle HR because it gives them a senior HR partner now and a company that's ready for an in-house HR leader later. Castle HR works only with growth-stage companies and has done this for more than 250 since 2019.

We know this fork in the road well. We've sat with founders who were one bad night away from posting "HR Manager, start ASAP," and with founders who'd already hired and were quietly wondering how to undo it. 

We only hire senior HR professionals, and our team averages over 20 years of experience. 

The results we get are clear as 60+ Castle HR clients have made The Globe and Mail's list of Canada's fastest-growing companies, and founders rate us 4.9 stars on Google.

Here's what crossing the bridge with Castle HR looks like:

Not ready to talk yet? Check out our other blogs or sign up for our newsletter.

P.S. The wrong HR hire is an expensive marriage and a messy divorce. The right partner gets you back to the dock, the front row and seat 2A. Book the HR Escape Plan call, run the test with us, and propose only when you're truly ready.

About the author. Tom Nickalls is the founder and CEO of Castle HR, a Toronto-based fractional HR firm he started in 2019. Castle HR works exclusively with growth-stage companies across Canada and the U.S., pairing each with a dedicated senior HR professional.