HR outsourcing costs: Pricing, models & what you should expect

How much does HR outsourcing cost?

If you’re looking for a straight answer, HR outsourcing costs in the UK typically range from £20 to £50 per employee per month, or around £100 to £500+ per month for small businesses on a retainer. For more comprehensive support, it can go higher depending on what you include.  

Now, before you breathe a sigh of relief (or mild panic), here’s the catch - that number moves quite a bit. And it moves for a reason.

HR outsourcing pricing isn’t fixed, because it depends on 3 simple things:

• How big your team is  

• What you actually want help with  

• How the provider chooses to charge you  

Most providers don’t price things in one neat package. Instead, they mix and match pricing models depending on your setup. Before we dive into the models, take a look at the types of HR outsourcing – trust us, you got to know them before you consider this option.

Common HR outsourcing pricing models

Here’s a simple way to look at the most common HR outsourcing pricing models before we break each one down.

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Now let’s unpack what each of these actually means in practice.

1. Per employee per month

This is the one you’ll see most often, and on the surface, it feels quite straightforward. You pay a fixed monthly fee for each employee, and that covers ongoing HR support. So, if you have 10 employees, you pay for 10. If you grow to 20, your cost doubles. Simple enough.

The appeal here is predictability. You know exactly what you’re paying each month, and it scales neatly as your team grows. For businesses hiring steadily, this can feel like a tidy, low-friction option.

That said, it can become expensive quicker than expected. Every new hire increases your cost, even if your HR needs don’t change much.  

2. Percentage of payroll

Instead of charging per employee, some providers take a percentage of your total payroll.

In simple terms, the more you pay your team, the more you pay for HR support. This model is often bundled with payroll processing or compliance-heavy services.

It’s fairly easy to understand, but a bit less predictable in practice. If salaries increase, bonuses are paid, or you expand your team, your HR costs rise alongside it.

So, while it aligns with payroll size, it doesn’t always reflect actual HR workload.

3. Flat monthly retainer

This is the “fixed fee, no surprises” model. You pay a set monthly amount for a bundle of HR services, regardless of how many employees you have (within reason).  

For small businesses, this can feel reassuring. You know your costs, and you can budget properly without worrying about every new hire increasing your bill. It works well when your HR needs are steady and fairly predictable.

The catch? These packages are often limited in scope. Once you step outside that scope, extra fees tend to appear - quietly, but consistently.

4. Hourly or project-based pricing

This model is as simple as it sounds. You pay for the time or specific project you need. It’s commonly used for:

• HR audits  

• Policy creation  

• Redundancy support  

• Handling specific employee issues  

If you only need occasional help, this can be cost-effective. You’re not tied into monthly fees, and you only pay when something comes up.

But it’s not ideal for ongoing support. Costs can become unpredictable, especially if issues arise more frequently than expected.

5. Custom or hybrid pricing

And then there’s the “it depends” model, which, in fairness, is quite common. Many providers combine elements of the models above.  

For example, you might pay:

• A monthly retainer for basic support  

• Plus, a per-employee fee for certain services  

• Plus, hourly charges for anything extra  

This approach gives flexibility, especially for businesses with mixed or evolving HR needs.

Typical HR outsourcing cost ranges

By now, you’ve probably realised there isn’t one neat number for HR outsourcing costs. That said, there are reliable UK benchmarks you can use as a starting point. Think of these as practical ranges, not promises.

Per-employee cost ranges

Most HR outsourcing providers in the UK price using a per-employee monthly model, and this is where you’ll see the widest variation.

• Basic HR support can start from around £20-£30 per employee per month.

• Some providers offer lower entry points (around £15 per employee) for limited services.

• More comprehensive packages can reach £35+ per employee monthly or higher depending on scope.  

So realistically, most businesses land somewhere between £20 to £50+ per employee per month.

Monthly costs by business size

If per-employee pricing feels a bit abstract, it helps to look at typical monthly costs based on company size. This is usually how providers present pricing in real conversations anyway.

1. Small businesses (under 10 employees) - Typically pay around £100 to £500 per month, depending on the support level.

2. Retainer-based services - Entry-level retainers often start from around £135-£149 per month for basic support.  

3. Growing SMEs (15–50 employees) - Real examples show around:  

• ~£199/month for ~15 employees  

• ~£319/month for ~50 employees  

At first glance, that might seem quite reasonable. But notice how the cost creeps up as your team grows or your needs become more complex.

Real-world pricing examples

Let’s make this a bit more concrete. Here’s what HR outsourcing might look like in practice.

Small business (5-10 employees)

Per-employee model:  

• 5 employees × £25 = ~£125/month  

• 10 employees × £25 = ~£250/month  

Retainer model:  

• Typically, £100-£300/month depending on scope

This works well if your needs are simple. But the moment you need more hands-on support, costs tend to increase quickly.

Growing team (20-50 employees)

Per-employee model:  

• 20 employees × £30 = ~£600/month  

• 50 employees × £30 = ~£1,500/month  

Real-world retainers:  

• Around £200-£300+ per month, often with limited scope  

Now this is where things start to feel… a bit less predictable. You’re paying more because your team is growing - fair enough. But in many cases, your actual HR workload doesn’t increase at the same rate as your headcount. Yet the cost does.

What affects HR outsourcing costs?

1. Number of employees

This is usually the biggest cost driver.

Most pricing models, especially per-employee pricing, scale directly with your headcount. More employees means more contracts, more queries, more compliance checks… so naturally, the total cost increases.

2. Scope of services

What you actually ask the provider to do makes a huge difference to cost.

At the basic end, you’re paying for:

• HR advice  

• Policy templates  

• Compliance guidance  

Step up a level, and costs increase as you include:

• Payroll processing  

• Employee relations support  

• Performance management  

• Benefits administration  

Go fully comprehensive, and you’re adding:

• Recruitment support  

• Onboarding and offboarding  

• Strategic HR planning  

In short, the more hands-on and involved the service, the higher the price. And quite often, these extras are layered on after you’ve signed up, which is where costs can quietly creep up.

3. Business complexity

If you operate:

• Across multiple locations  

• In heavily regulated industries  

• With complex contracts or shift patterns  

…then your HR needs become more demanding.

More compliance checks, more documentation, more risk to manage - all of this increases the level of support required, and therefore the cost.

4. Hiring volume and support level

If you’re hiring regularly or scaling quickly, your HR workload increases even if your current headcount is modest.

Costs tend to rise when you need:

• Frequent recruitment support  

• Regular policy updates  

• Ongoing employee issue handling  

• Strategic HR advice  

So even if you’re small today, a growth phase can push your HR outsourcing costs up faster than expected.

5. Geography and provider model

Where your provider operates from can influence pricing, although it’s not always the main factor. UK-based providers typically come with higher costs due to local salaries and compliance expertise.  

Providers operating across multiple regions may offer different pricing structures depending on how their teams are set up. It’s worth noting, though geography alone doesn’t guarantee better service or better value. It simply changes the cost base.

6. Technology and HR software included

Some HR outsourcing packages include access to tools and systems, while others charge extra for them. These can include:

• HRIS (Human Resource Information Systems)  

• Payroll software  

• Compliance tracking tools  

• Employee self-service platforms  

If these are bundled in, your monthly fee may be higher, but you avoid separate software costs. If they’re not included, you may end up paying for them elsewhere. Either way, it’s important to check what’s actually included.  

HR outsourcing cost breakdown

When you receive a quote, it’s rarely just one simple fee. Most providers split costs into a few key components, and this is where things can either stay clear… or get a bit murky.

1. Setup fees

Some providers charge an upfront fee to get you started. This can include:

• Onboarding and account setup  

• Transferring employee data  

• Reviewing existing policies and contracts  

Not every provider charges this, but when they do, it’s usually a one-off cost at the start.

2. Ongoing service fees

This is your main monthly cost. It’s typically structured as:

• Per employee pricing (most common)  

• Flat monthly retainer  

• Percentage of payroll  

This fee covers your day-to-day HR support, but what’s included can vary quite a lot — so it’s worth checking the scope carefully.

3. Extra charges to watch for

Common extras include:

• Policy creation or updates  

• Recruitment support  

• Handling complex employee issues  

• Compliance projects or audits  

• Additional advisory time  

These are usually charged separately, even if you’re already paying a monthly fee.

4. Hidden costs most businesses miss

A quote might look simple at first, but a few details can change the real cost:

• Contract lock-ins - Long-term agreements with limited flexibility.  

• Minimum fees - Even if your team is small.

• Add-on services - Tools, reports, or support tiers not included upfront.

When does HR outsourcing cost not make sense?

HR outsourcing can look neat on paper. Fixed fees, external support, fewer internal headaches. But there comes a point where the model starts to feel… a bit limiting.

And more importantly, a bit expensive for what you’re actually getting.  

Here’s where things tend to break down.

1. When your team starts growing

Outsourcing costs usually scale with headcount. So, as you hire more people, your monthly bill climbs, even if your HR needs don’t increase at the same pace. You’re paying more but not always getting more value.

2. When you need consistent, hands-on support

Outsourced HR is, by nature, external. That means:

• Slower response times  

• Limited understanding of your day-to-day culture  

• Less proactive support  

If you need someone embedded in your business, not just advising from the outside, this model can feel restrictive quite quickly.

3. When costs become unpredictable

What starts as a simple monthly fee often grows with:

• Extra advisory hours  

• Policy updates  

• Recruitment support  

• Compliance projects  

Suddenly, your “fixed” cost isn’t so fixed anymore.

4. When you’re sharing more than you’d like

Working with external providers means sharing employee data, internal processes, and business decisions outside your organisation.

For some businesses, that might be fine. For others, it starts to feel like you’ve lost a bit too much control over something quite sensitive.

So, what’s the alternative?

Instead of outsourcing HR as a service, many growing businesses are now building their own HR capability - just not locally.

With an offshoring model (typically supported through an Employer of Record), you’re not paying for a provider to handle HR. You’re actually hiring a dedicated HR professional into your team, based in another country.

That changes a few important things:

• You get full control over how HR is managed.

• The person works as part of your business, not as an external consultant.

• Costs are often more stable and scalable, without per-employee pricing creeping up (and hiring costs are way lower compared to the UK, too!).

• You reduce the need to share sensitive data across multiple external providers.  

In simple terms, it shifts HR from being an outsourced function to an owned capability - just delivered in a more cost-efficient way.

HR outsourcing cost vs offshoring with EOR cost - How do they compare?

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Why offshoring costs less

At first glance, the cost difference can feel almost too good to be true. But there are some very practical reasons behind it, and none of them have anything to do with cutting corners.

The biggest factor is the cost of labour. In countries like India, salaries for skilled professionals are significantly lower than in the UK due to differences in living costs and local wage benchmarks.

And you don’t compromise on talent either. There are 125 million English speakers in India and millions of graduates being added to the workforce every year!  

What you actually get for the cost

With HR outsourcing:

• You’re paying for access to a provider  

• Support is shared across multiple clients  

• Extra work often comes at an additional cost  

With offshoring + EOR:

• You hire a full-time HR professional  

• They work only for your business  

• You control priorities, processes, and output  

It’s the difference between renting HR support and building your own HR team – you don’t hand things out to a provider; you keep the resource, the knowledge, the data, and growth within the team!

Build your own HR team with Black Piano’s EOR model

At some point, the question stops being “how much does HR outsourcing cost?”

It becomes “why am I paying ongoing fees for something I could build in-house?”

With Black Piano, you’re not getting access to a pooled HR team juggling multiple clients. You’re hiring a dedicated HR consultant or recruiter who works only for your business.

• No upfront recruitment costs

• Save up to 70% on hiring costs based on the role

• Everything handled, end to end

• Ongoing support for both you and your hire

• No per-employee pricing creeping up, no extra charges, no reliance on external providers for daily HR

And that’s the real difference. You’re not outsourcing HR anymore. You’re building it – the right way! Speak to us today to discuss your requirements – we're here to help you find the right solution.

Final thoughts - Are HR outsourcing costs worth it?

The honest answer? It depends on where your business is right now.

If you just need occasional HR support, outsourcing can work well. It keeps you compliant and avoids hiring internally too early.

But as soon as you start growing, the cracks begin to show.

• Costs rise with every new employee  

• Extra support often comes at an extra fee  

• You’re still relying on an external provider for something quite central to your business  

So, while HR outsourcing looks cost-effective at the start, it doesn’t always stay that way. Instead of asking “is HR outsourcing worth the cost?” It’s often more useful to ask: “Is this the right model for how we’re growing?”

FAQs

1. Is HR outsourcing priced monthly or annually?

Most HR outsourcing services are priced monthly, typically through retainers or per-employee fees. Some providers offer annual contracts for discounted rates, but these often come with lock-ins and less flexibility if your needs change.

2. Does HR outsourcing get cheaper as headcount grows?

Per-employee rates may reduce slightly as your team grows, but total costs still increase. In practice, you end up paying more overall, as pricing usually scales directly with the number of employees you have.

3. Are recruitment and compliance usually included in standard pricing?

Basic compliance support is often included, but recruitment and more complex compliance work are usually charged separately. This can increase costs quickly. With an EOR model, compliance is typically built in, and with EOR providers like Black Piano, hiring is also handled as part of the solution.

4. What is the difference between PEPM pricing and payroll-based pricing?

PEPM (per employee per month) charges a fixed fee per employee, while payroll-based pricing is calculated as a percentage of total salaries. Both models scale with headcount, which means costs rise as your team grows.