So, you’re thinking about hiring an employee. Maybe the workload has become too much for one person. Maybe your business is growing faster than expected. Or maybe you’re just ready to stop doing all the things yourself.
Whatever the reason, bringing someone on board can be one of the best—and most daunting—decisions you’ll ever make as a business owner. Between payroll, taxes, contracts, insurance, and employee rights, it’s no wonder so many small businesses put off hiring for far too long.
But it doesn’t have to be that scary. This guide will walk you through everything you need to know about hiring, from working out what it’ll cost you to staying on the right side of employment law.
So let’s make this as simple and human as possible—no jargon, no fluff, just actionable advice for UK small businesses.
1. Can You Afford to Hire?
Before you even begin the process of hiring an employee, you need to figure out if it makes financial sense. Spoiler alert: salary isn’t the only cost you’ll be covering.
Here’s what you’ll need to factor in:
Basic Costs of Hiring an Employee:
- Gross salary (e.g. £25,000/year)
- Employer’s National Insurance Contributions (NICs) – around 13.8% on earnings above £9,100/year
- Pension contributions (minimum 3% of qualifying earnings under auto-enrolment)
- Holiday pay – full-time employees are entitled to 28 days (including bank holidays)
- Sick pay, maternity/paternity leave, redundancy – all potential future costs
Now let’s break it down into real numbers.
Example: If you hire someone on £25,000 per year, your total cost might look more like £28,500–£30,000 once you add NICs, pensions, and holiday pay.
✍️ Other Hidden or Indirect Costs:
- Payroll software or accountant fees
- Equipment, licences, or uniforms
- Time spent on onboarding, training, and admin
But don’t panic just yet—we’ll talk about how to make sure your new hire pays for themselves.
2. How to Work Out the True Value of a New Employee
When it comes to hiring an employee, it’s not just about cost—it’s about return on investment. You’re not just paying someone to “help out”—you’re hiring them to help grow your business.
Ask yourself:
How Much Profit Will This Employee Generate?
Start by estimating the revenue their work will bring in. If they’re in a sales role, this is fairly easy to quantify. But even admin or operational staff can save you time that you can now use to generate income.
Example: If your new hire frees up 15 hours a week, and you can now spend those hours delivering £50/hr services, that’s £750/week in potential income—or nearly £39,000/year.
Then compare that to their total employment cost. If they cost £30,000/year and generate £39,000, you’re already £9,000 up—not to mention less stressed.
Consider Value Beyond Numbers
- Do they improve customer experience?
- Do they increase your capacity to scale?
- Do they allow you to take on new clients, locations, or projects?
- Do they reduce your burnout?
Hiring is a big decision—but when done right, it can be the catalyst for serious business growth.
3. What You Need to Do Before Hiring an Employee
Ready to take the leap? There are a few key things you need to have in place before that job ad goes live.
✅ 1. Register as an Employer with HMRC
You need to register at least one week before the first payday. You’ll get a PAYE reference number, and this will be used for payroll, tax, and National Insurance.
✅ 2. Set Up a Payroll System
You’ll need to:
- Run payroll every month (or week)
- Deduct income tax and NICs from employee wages
- Report to HMRC (Real Time Information – RTI)
- Pay HMRC monthly
You can use payroll software like BrightPay, Moneysoft, Xero, or QuickBooks, or outsource to a payroll provider or accountant.
✅ 3. Check the Right to Work in the UK
It’s your legal responsibility to check that every employee has the right to work in the UK. This includes seeing original documents and keeping copies.
✅ 4. Get Employers’ Liability Insurance
This is a legal requirement and protects you if an employee gets injured or sick as a result of working for you. It must cover at least £5 million.
✅ 5. Create a Written Employment Contract
You must give every employee a written statement of employment particulars on or before their first day. It should include:
- Job title & duties
- Salary & payment schedule
- Hours and holiday entitlement
- Notice periods
- Sick pay & leave
Templates are available online, but it’s worth getting legal advice to tailor it to your business.
✅ 6. Enrol Them in a Pension Scheme
If they’re over 22, earn more than £10,000/year, and work in the UK, you’ll need to auto-enrol them in a workplace pension (usually via NEST or another provider).
4. Managing Payroll Pressure During Quiet Periods
One of the biggest fears around hiring an employee is: “What happens if I can’t afford to pay them during a slow month?”
Here’s how to protect yourself:
Don’t Hire Too Early
Make sure there’s enough consistent work and cash flow to justify hiring. Consider outsourcing or using freelancers for short-term support while you build.
Build a Payroll Buffer
Set aside at least 2–3 months’ worth of wages in a separate savings account. That way, if income dips or a client pays late, you’ve still got your team covered.
Monitor Cash Flow Weekly
Use accounting software to forecast upcoming income and expenses. If things look tight, you’ll catch it in time to make changes—like delaying purchases or chasing payments.
⚙️ Use Part-Time or Probationary Periods
Start with part-time or a 3- to 6-month probationary contract so both sides can test the waters. It gives you flexibility and reduces long-term risk.
5. Know Your Employee’s Rights (So You Don’t Land in Trouble)
Once you’re hiring an employee, you’re officially subject to UK employment law—so it’s worth getting familiar with the basics.
Here’s what employees are entitled to from day one:
Legal Rights:
- National Minimum Wage (check age bands)
- Holiday pay – 28 days incl. bank holidays (pro-rata for part-time)
- Statutory Sick Pay (SSP) if they’re off sick for more than 3 consecutive days
- Maternity/Paternity Leave and Pay
- Rest breaks and working time limits
- Protection against discrimination or unfair dismissal
Also, don’t forget:
- You must provide payslips every payday.
- Employees can request flexible working after 26 weeks.
- After 2 years of service, employees gain extra rights (like redundancy pay and unfair dismissal protection).
✅ Pro tip: ACAS (acas.org.uk) offers excellent free guidance on employment rights and contracts.
Hiring Should Feel Like Growth, Not a Gamble
Yes, hiring an employee comes with responsibility—but also massive reward.
It can transform how you run your business. It can give you back your evenings and weekends. It can help you serve more customers, grow faster, and avoid burnout.
But it has to be done right.
✅ Do the maths
✅ Prepare your systems
✅ Know your legal responsibilities
✅ Hire the right person for the right role at the right time
Remember: the goal isn’t just to add someone to your payroll—it’s to add value to your business.
If you’re still unsure, start with a part-time or temporary role. Get support from your accountant. Talk to others who’ve hired before. And know that you’re not alone—many small business owners feel the same.
This might just be the start of your biggest growth chapter yet. In case you need a free consultation, please book a meeting with our team.
