Keeping payroll in-house can give your recruitment agency greater control, but the true cost goes beyond payroll software and salaries. Factors such as time, additional headcount, compliance, errors and the pressure of scaling your processes can all add up. The question isn’t just whether you can manage payroll internally, but whether it’s actually the most cost-effective use of your resources.
It likely made perfect sense to manage payroll internally when you first started your recruitment agency.
You had a manageable number of workers, someone in the business who knew the ins and outs of the process, and systems in place that got the job done. Which meant there was little reason to get anybody else involved.
But payroll often gets more complicated the more your agency grows.
More placements mean more workers to pay, as well as more queries to answer, more data to process and more opportunities for something to go wrong. And before you know it, a process that once worked without a hitch can start taking up a lot more time, money and attention.
So, let’s see what managing payroll internally is really costing your agency…
The Obvious Cost: Your Payroll Team
Let’s start with the cost that’s easiest to see.
Running payroll internally requires people. Depending on the size of your agency, that could mean one person handling payroll alongside other responsibilities or an entire team dedicated to it.
But salary’s not the only cost of employing someone.
For the 2026/27 tax year, employers generally pay 15% Class 1 National Insurance on earnings above the Secondary Threshold, alongside the wider costs of pensions, training, software, equipment and employee benefits.
As your contractor book grows, more than likely, you’ll end up needing more payroll capacity, too. That could mean increasing hours, recruiting another member of staff, or spending more money on additional systems.
So then the question becomes whether those costs are still giving you the best return.
Then There’s the Time You Don’t See
Not every payroll cost appears neatly on a P&L.
Think about everything that happens around payday: checking data, correcting timesheets, answering worker queries, investigating discrepancies, updating records and dealing with last-minute changes.
Then think about who gets pulled in when something goes wrong…
If your finance team, operations staff or even directors are regularly stepping in to sort out payroll issues, that’s time they’re not spending elsewhere in the business.
This is where the cost of internal payroll becomes harder to measure. It’s not just what you spend running it. It’s what your team could have been doing instead.
If you’re currently deciding whether that trade-off still makes sense, comparing payroll outsourcing with managing payroll in-house can help you weigh up the benefits and limitations of both models.
Payroll Errors Can Cost You Too
Even experienced teams make mistakes.
A wrong tax code, incorrect deduction or missed payroll submission can mean more admin to put things right. More importantly, payroll errors affect real people.
A contractor who isn’t paid correctly isn’t interested in how busy your payroll team was that week. They just want the problem fixed.
HMRC requires employers to submit a Full Payment Submission (FPS) every time employees are paid, covering how much they’ve been paid and the PAYE and National Insurance deductions made. Errors then need to be corrected through the appropriate payroll reporting process.
Late or incorrect reporting can also create further problems, including potential penalties and issues with employees’ income-related benefits.
That’s why payroll accuracy and compliance need to be considered together. Getting payroll right first time saves your team from spending even more time putting it right afterwards.
Compliance Takes Time
Payroll isn’t one of those processes you can just set up once and forget about.
That’s because many factors are constantly undergoing changes and updates, from tax rules to employment legislations and reporting requirements. And for recruitment agencies working with umbrella companies, the compliance picture has become even more important following the introduction of Joint and Several Liability in 2026.
Someone within your business needs to understand those changes, work out what they mean for your agency and your processes, and make sure they’re implemented without error.
That takes a great deal of time and expertise.
Knowing the payroll compliance risks recruitment agencies need to manage is one thing. Having the internal capacity to stay on top of them while running payroll every week or month is another.
What Happens When Your Agency Grows?
Here’s where the maths can really start to change.
A payroll process built for 50 workers might work brilliantly… but what happens at 100? Or 500?
More workers often mean more timesheets, payments, queries, reporting and compliance work. If your internal payroll function relies on continually adding people or expecting your existing team to do more, then growth starts adding pressure to your back office.
Your payroll function should be able to scale with the rest of the agency.
That’s one of the reasons agencies consider outsourcing. Instead of building yet more internal payroll capacity every time volumes increase, a specialist provider can give you access to the people, the processes and the systems needed to handle that growth.
Of course, you shouldn’t just choose any provider. Recruitment payroll has its own challenges, so a provider’s recruitment expertise, compliance, scalability and communication should all be considered when choosing a payroll outsourcing partner.
So… Is In-House Payroll Actually More Expensive?
No, not necessarily.
For some recruitment agencies, keeping payroll in-house will continue to make commercial sense. You may already have all the expertise, technology and capacity you need.
The mistake, however, is in assuming that in-house is automatically cheaper because you aren’t paying an outsourcing fee.
To understand the real cost, look at the whole picture:
- Payroll salaries and employer costs
- Software and technology
- Training and ongoing development
- Time spent processing and checking payroll
- Time spent handling queries and correcting errors
- Compliance and reporting
- Additional headcount as your agency grows
Once you add those together, you can make a much fairer comparison.
Look Beyond the Payroll Bill
Looking at the lowest visible monthly cost isn’t the best way of judging which payroll model is cheapest. You should be looking at what gives your agency the right balance of accuracy, compliance, efficiency and capacity without taking resources away from the areas that matter the most.
If your internal payroll function is becoming harder to manage as your agency grows, it might be a good time to run the numbers again.
At Omnia Outsourcing, we help recruitment agencies take the pressure out of payroll, combining specialist recruitment payroll expertise with FCSA Accredited and SafeRec Certified processes.
Thinking about outsourcing your payroll? Get in touch with our team to talk through your current setup and let’s see whether outsourcing could work for your agency.