Can I Afford My First Employee?
The real cost of hiring your first employee goes far beyond the headline salary. Learn how to calculate employer National Insurance, pensions, holiday pay, downtime, and tools — and how to test whether your business can actually sustain the cost.
Written by Daniel, peer-reviewed by Marcus
Last reviewed:
Published:
Who this is for: Founders, freelancers, and sole traders who are drowning in work and desperately considering their first permanent hire.
The short answer
Salary is the floor, not the total cost
The number you put in a job advert is the smallest figure in the true cost of employing someone. In the UK, Employer National Insurance (NI) is added on top of gross pay by law once the salary passes a certain threshold. This is a tax on the business for the privilege of employing someone, and it is not deducted from the employee's pay — it is an extra cost to you.
Current rates and thresholds change frequently (often in the Chancellor's Budget), so you must check GOV.UK for the exact percentage rather than relying on a figure you saw last year.
Once you have an employee, you also have ongoing payroll administration. You must run PAYE, report to HMRC on or before every payday, and keep strict records. Whether you buy payroll software or pay an accountant to run it for you, this is another monthly fixed cost.
Pensions and holiday are not optional perks
Under UK law, if your new hire is aged between 22 and State Pension age and earns over £10,000 a year, you are required to automatically enrol them into a workplace pension. You must make a minimum employer contribution (currently 3% of qualifying earnings, but check the Pensions Regulator for updates). This is a real, recurring cash cost, not a perk you can decide to skip.
Paid holiday is also a strict legal entitlement. Almost all workers are legally entitled to 5.6 weeks' paid holiday a year (known as statutory leave entitlement or annual leave). This means you are paying a full-time salary for roughly 46 weeks of actual work. You must build this reality into your annual cost model rather than treating the salary as though every week produces billable output.
- Employer National Insurance contributions (check current rates on GOV.UK).
- Employer pension contributions under automatic enrolment.
- Statutory paid holiday entitlement (5.6 weeks minimum).
- Statutory Sick Pay (SSP) if it arises.
- Payroll software subscriptions or bookkeeper/accountant fees.
The hidden costs nobody puts in a spreadsheet
New employees need physical and digital infrastructure. They need a laptop, software licences (a new seat on Google Workspace, Xero, Adobe, etc.), a phone, and possibly a desk. You must also upgrade your insurance to include Employers' Liability cover, which is a strict legal requirement the moment you employ anyone in the UK.
None of that is optional, and almost all of it is due before the employee generates a single penny of value for the business.
Then there is the 'downtime cost'. For the first 8 to 12 weeks, you are training rather than delegating. Your own billable output will drop because you are managing someone new, and their output will be slow and error-prone. Most first-time employers underestimate this training drag far more than they underestimate the salary.
Test the cost against a bad month, not a good one
The instinct to hire usually peaks during your busiest, most profitable month. But the real question is not 'can I afford this right now?' but 'can I keep paying this salary through a quiet quarter in February?'
If the hire only works mathematically when trade is at its absolute peak, you have not tested affordability — you have just tested optimism. An employee's mortgage depends on you making payroll every single month, regardless of your sales.
Worked example: A £28,000 salary is rarely a £28,000 decision
- Advertised gross salary
- £28,000
- Employer National Insurance (Estimate)
- £2,500+ (Check GOV.UK for exact current rate)
- Employer pension contribution (3% auto-enrolment)
- £650+
- Equipment, software seats, and insurance in year one
- £2,000
- Recruitment cost (advert, agency, or your lost time)
- £1,000
- Estimated true first-year cash cost
- £34,150 (roughly 22% above the headline salary)
Illustrative example only. Employer NI and pension percentages change based on government budgets and the employee's exact circumstances. Always confirm current figures on GOV.UK and thepensionsregulator.gov.uk before setting your budget.
What to do, in order
- 1
List every cost, not just the salary
Build a spreadsheet adding employer NI, pension, equipment, software, insurance, and recruitment costs to the gross pay.
- 2
Check current rates on GOV.UK
Employer NI thresholds and pension minimums change frequently; do not rely on last year's numbers or a blog post from 2022.
- 3
Model three months of quiet trade
Look at your lowest-earning quarter from last year. Can the business cover the full new employment cost without breaking?
- 4
Add a training and ramp-up allowance
Assume reduced output from both you and the new hire for the first 8–12 weeks. Do not expect them to be profitable on day one.
- 5
Check your cash runway, not just your profit
A profitable business can still run out of cash paying weekly wages while waiting 60 days for customers to pay invoices.
- 6
Set a hard review point
Three and six months in, check the financial numbers against reality. Is the employee generating the return you expected?
Common mistakes
- Budgeting for the gross salary alone and being genuinely shocked by the size of the first HMRC payroll bill.
- Assuming this month's exceptionally busy period is the 'new normal' and hiring permanently to fix a temporary spike.
- Forgetting to buy Employers' Liability insurance, which is a legal requirement carrying heavy daily fines if ignored.
- Not allowing for the severe productivity dip while you train someone new, leading to missed client deadlines.
- Hiring an employee when a freelancer or contractor would have been a safer, more flexible bridge.
If you only have five minutes
Frequently asked questions
- Do I have to offer a pension to my first employee?
- In almost all cases, yes. If they are aged 22 to State Pension age and earn over £10,000 a year, they meet the criteria for automatic enrolment. The employer contribution is a strict legal requirement, not a discretionary benefit. Check thepensionsregulator.gov.uk for the exact rules.
- Is it cheaper to use a freelancer or contractor instead?
- It can reduce some fixed employment costs (like NI, holiday, and pensions) and offers flexibility. However, employment status is determined by the reality of the working relationship, not just by what you call it or what the contract says. Getting 'IR35' or employment status wrong carries heavy HMRC penalties, so take professional advice if you are unsure.
- How much cash runway should I have before hiring?
- There is no single answer, but most advisers suggest having enough cash reserves to cover the full cost of the new role (and your own survival) for at least three to six months, relying on actual money in the bank rather than hoped-for future growth.
Sources
Who wrote and checked this
Written by Daniel Mercer, who has run the numbers on his own small business and writes from that experience. Daniel is not an accountant or a regulated financial adviser. Who writes this site.
Peer reviewed by Marcus Thorne, Small Business Advisor. Peer reviewers check for technical accuracy and compliance with current UK regulations.
Last reviewed: 27 July 2026
Do this next
Next steps
- 1
Put the numbers in: Business Money Check-Up
Use your own figures rather than the worked example above.
Open the tool - 2
Read next: Funding Growth Responsibly
How to think about funding growth — whether through retained profit, short-term credit, or external finance — without overcommitting the business. Plus, the vital questions to ask before you sign anything.
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