Picture the moment you decide to hire someone.
Revenue is growing. The team is stretched. You have been putting in effort for months but the work is piling up and you know you need another person to take some of the pressure off your existing team. So the conversation shifts to the possibility of a hire.
It feels good. It should feel good and you’re proud of what you’re building. Hiring is a sign that things are working out for the business.
What about the costs of hiring a resource, the actual cost of hiring, that is? Not just the salary. The whole number. What is this person actually going to cost the business every month for the next twelve months?
We break that down in this article
What does it really cost to hire an employee in the UK?
The true cost of bringing someone into your business is typically 1.5 to 2 times the salary. And if it doesn’t work out, most of that is irrecoverable. Here’s a worked example, built from current rates and genuine industry benchmarks rather than rounded guesses, so you can see exactly where the gap comes from.
A salary of £35,000 sounds straightforward. One number. Monthly payroll. Easy to plan around. And yet the number that actually leaves the business in year one looks very different once you account for all the additional costs.
Employer National Insurance: From April 2025, employers pay 15% NIC on everything an employee earns above £5,000 per year. On a £35,000 salary, that is £4,500 direct cost. This threshold used to be £9,100, so if you have budgeted based on older figures, the real number has shifted significantly. For context, a £50,000 salary now carries an employer NIC bill of approximately £6,750 per year.
Pension contributions: Auto-enrolment is not optional and there is no workaround. Employers must contribute a minimum of 3% of qualifying earnings into a workplace pension for every eligible employee, unless an employee willingly opts out. Qualifying earnings sit between £6,240 and £50,270, so on a £35,000 salary the working is 3% of (£35,000 minus £6,240), which is 3% of £28,760, coming to £863 a year. That’s where the figure comes from, not a rounded estimate. Many businesses contribute more to stay competitive. Failing to set this up carries an automatic £400 penalty for the first breach, rising to £10,000 for repeated failures.
Note that this rule doesn’t apply to owner-employees or director-employees.
Recruitment costs: If a role is recruited through an agency, fees typically run 15 to 20% of the first-year salary. On a £35,000 role, that’s £5,250 to £7,000. CIPD’s 2024 Resourcing and Talent Planning report, based on a survey of over 1,000 UK HR professionals, gives a different and more conservative picture: the median cost of recruiting a non-senior employee, across all methods including in-house resourcing time and advertising, sits at around £1,500. That figure has actually fallen in real terms over the past few years. For a senior or director-level hire, CIPD’s median rises to £2,000.
The honest answer is that this cost depends heavily on whether the role is hard to fill and whether external agency support is used. For this worked example, we’ll use £5,250, the lower end of the typical agency range, as a reasonable assumption for a role that needed some external support without being a difficult, agency-led senior search.
Equipment and setup: Before the person has done a single day of work, the business has usually spent somewhere between £500 to £5,000 on a laptop, monitor, software licences and whatever else they need to do the job – depending on the type of work they’ll be doing. If an employee works from home, employers tend to contribute towards the costs of a home office set up, like chairs and tables. There could be other annual costs like renewal of subscriptions needed.
Training and onboarding: This is where the real risk sits, and CIPD’s 2024 data is sobering on the point. As per the report, organisations that recruit staff in the last 12 months, the chances of new recruits resigning within the first 12 weeks was more than 40%. There are definite costs incurred by companies in investing time and energy to the recruitment process. While this can be tiring for candidates, there’s also definite risks on hiring managers. In terms of costs, while difficult to estimate with certainty, we’ll use a conservative £750 for this example.
Senior management time: This is a real cost to any business, a person or department that is having to juggle their time and capacity to scout and train for talent. It’s a hard task and companies cannot do without. Hiring can be a time squeeze for everyone involved. No way to quantify this sadly.
Office space, facilities and other benefits: If a company has office premises, a new desk space or extending office space needs to be considered. While a lot of companies are work from home post the pandemic, even the occasional on-site can be more expensive once you have the new employee in.
Employer liability insurance: Legally required for every business with employees. Non-negotiable and non-negotiably a cost of employment. For a small business this typically adds a modest amount, often a few hundred pounds a year, depending on the policy and headcount covered.
Keyman insurance: Keyman insurance, also called key person insurance, protects the business financially if a critical employee is unable to work due to serious illness or death. If a hire is genuinely critical to the revenue, client relationships or operational capability of the business, the cost of replacing them or absorbing the loss of their output can be significant. The premium varies depending on the level of cover, the person’s age and health, and the sum insured, but for a business making a high-value hire it is a serious consideration so well worth budgeting for.
Summing up all of these, while we started with a cost of £35k as salaries, the real costs are more like £54,863. That is 1.57 times the number on the offer letter.
How to legally reduce your UK employer hiring costs
Before assuming the numbers above are fixed, it is worth knowing that there are legitimate ways to reduce hiring costs while keeping an employee’s take home pay sacrosanct.
The Employment allowance lets eligible employers offset up to £10,500 from their annual employer NIC bill for 2026/27, up from £5,000 in 2024/25. Single-director companies with no other employees are not eligible for the claim, but most businesses with a small team will qualify. On a hiring decision, that allowance can make a meaningful difference.
Salary sacrifice arrangements can also reduce the NIC bill for both employer and employee where structured correctly, making contributions more tax-efficient for everyone involved.
And depending on the nature of the role and where the business currently sits, there is sometimes a genuine question about whether a permanent full-time hire is the right structure at all, or whether contract, part-time or fractional engagement would be more appropriate and more cost-effective at this stage.
These are the conversations that should happen before the offer goes out.
UK employment law: What must be in place before your new hire starts
When someone joins, there is a set of statutory requirements that must be in place before the person starts. Here you go,
PAYE registration: Register with HMRC before the first pay run. A business paying an employee without a PAYE registration is non-compliant from the very first payment.
RTI reporting: Real Time Information requires every payment to be reported to HMRC on or before each payday, electronically and without exception.
Pension auto-enrolment: The scheme must be configured and the eligible employee enrolled before their start date. Getting this wrong is not a paperwork issue. It is a regulatory breach with escalating penalties from The Pensions Regulator (TPR).
Right to work verification: Every employer must verify the right to work before employment begins. There is no grace period. Civil penalties run to £60,000 per illegal worker.
Written contract: The written statement of employment particulars is a day-one right under the Employment Rights Act 1996. Issuing it late is a breach of a statutory obligation.
Employer liability insurance: Required by law for virtually every business with one or more employees. Minimum cover of £5 million. Operating without it carries fines of up to £2,500 per day.
Health and Safety training: By law it is required by employers to provide new employees with necessary training before they start working for you. What it looks like depends on the nature and operations of your business. For example, if you are based in an office environment, make sure everyone is trained as follows: hazards (things that could cause them harm), risks (the chances of that harm occurring), measures in place to deal with those hazards and risks, how to follow any emergency procedures. And keeping the training records is necessary for employers.
Financial planning before hiring: The questions every UK employer should answer first
Most hiring decisions that cause problems later were not bad hires. They were hires made in a hurry, perhaps on the back of the salary number alone, without working through what the full cost looks like against the cash flow for the next twelve months.
Considering a hire, answer these as honestly as you can before any role is advertised, a business owner should be able to answer these honestly.
- Can the cash flow sustain the full cost of this hire for twelve months? Not just the salary. The whole number. Including the months where the person is still settling in and not yet fully productive.
- Does the P&L genuinely have room for this, or is the plan depending on revenue growth that has not happened yet?
- Is a full-time permanent hire the right structure for what the business needs right now, or would something more flexible work better?
- Is this a long-term role or a short-term project that could be scoped and engaged differently?
- Could a process change or some automation handle part of the workload instead of a new hire?
- In an event where the hire doesn’t work out, are you able to bear the financial loss that stems from it. What happens financially if the hire does not work out within the first six months, and how much of the cost becomes a sunk cost at that point?
Best to answer these or speak with this to your accountant or advisor before an offer is given. If any of those questions prompt a pause, the pause is valuable. It is the right moment to work through the numbers before the process goes any further, not after the offer has been accepted and the recruitment fee has been paid.
We have been helping businesses get this right since 2018
Growing a team is one of the most significant decisions a business makes.
At Evalua8 we have been working with business owners on exactly this since 2018. We can help you model the full cost of a hire before the offer goes out, set up payroll and compliance correctly from day one, identify the most tax-efficient way to structure the engagement, advise on keyman insurance for critical hires and make sure every legal requirement is in place before it becomes a problem.
If you are thinking about hiring and want to make sure the numbers genuinely work before anything is advertised or offered, we would be glad to have that conversation.
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