Sole Trader Employing Staff: A First Hire Guide

A sole trader must register as an employer with HMRC before the first payday, and cannot register more than two months in advance ^[1]. Employers' liability insurance must cover at least £5 million, and a business that trades without it can be fined £2,500 for every day it is uninsured ^[2]. The first hire is the moment a one-person business becomes an employer, and the legal duties arrive all at once.

Taking on an employee does not change a sole trader into a company. The business stays a sole trade, the owner stays personally liable, and self-assessment continues as before. What changes is that the owner now operates PAYE, assesses a worker for a pension, and carries a set of employment duties that did not exist when the business paid only its owner.

This guide walks a sole trader through the sequence: confirming that a sole trader can employ staff at all, registering as an employer, the pre-employment checks, paying the employee legally, employer National Insurance and the allowance that offsets it, auto-enrolment, and the statutory payments that apply from day one.

Key takeaways

• A sole trader can employ staff without incorporating; the business remains a sole trade and the owner remains personally liable.
• Registration as an employer must happen before the first payday, and HMRC will not accept a registration more than two months ahead.
• Employers' liability insurance of at least £5 million is a legal requirement, with a £2,500 daily fine for trading without it.
• The National Living Wage is £12.71 per hour for workers aged 21 and over from 1 April 2026.
• The first eligible worker triggers automatic enrolment duties and statutory pay obligations from the start of employment.

A sole trader can employ staff without changing legal structure

A common worry at the first hire is that taking on staff forces a change of business structure. It does not. A sole trader can employ one or many people and still trade as a sole trader, with the same Unique Taxpayer Reference and the same Self Assessment return ^[3]. The word "sole" describes the ownership of the business, not the size of its workforce.

What the first hire does change is the owner's relationship with HMRC. Until the first employee, the business reports only the owner's self-employed profits once a year. From the first payday, the business also runs PAYE, which is a real-time reporting system tested on every single payrun rather than once a year ^[4]. The two systems run in parallel: Self Assessment for the owner's own profits, PAYE for the employee's wages.

What stays the same and what is new

The owner's own tax position is unchanged. A sole trader still pays income tax and National Insurance on business profits through Self Assessment, and the employee's wages are a deductible business expense that reduces those profits ^[5]. The owner does not go on the payroll themselves, because a sole trader takes drawings rather than a salary.

The new layer is the employer role. The business must now calculate and deduct income tax and National Insurance from the employee's pay, add employer National Insurance on top, and report all of it to HMRC ^[6]. A sole trader taking this on for the first time is stepping into small business payroll with the same compliance duties as any limited company, which is why getting the setup right from the first payrun matters.

Registering as an employer with HMRC

The first formal step is registering for PAYE. An employer must register before the first payday, because the PAYE reference number arrives by post and the business needs it to report correctly ^[7]. The number is not issued instantly, so leaving registration to the week of the first payrun risks missing the first reporting deadline.

There is a window, not a free hand. An employer cannot register more than two months before the first payment to staff ^[8]. The practical advice is to register as soon as the start date and first payday are fixed, and no later than the point two months before that date opens.

Getting the PAYE reference in time

The registration produces an employer PAYE reference and an Accounts Office reference, both sent in a letter from HMRC ^[9]. These two references are the keys to every future submission and every PAYE payment, so they need to be in hand before the first payrun is processed. A sole trader who registers early avoids the common first-hire mistake of paying an employee before the scheme is live and then scrambling to report the payment after the fact.

Registration is also the point at which the employer confirms details such as the business name and the expected number of employees ^[10]. None of this is onerous, but it has to precede the first payment, which is why the register-first, pay-second order is non-negotiable.

Reporting pay in real time

Once the scheme is live, the employer must tell HMRC about the new employee on or before their first payday, usually through the first Full Payment Submission ^[11]. The on-or-before rule then applies to every payrun: the FPS records what was paid and deducted, and it must reach HMRC on or before the day wages are paid ^[12].

The money side follows a separate deadline. The employer pays the PAYE bill, the tax and National Insurance withheld plus the employer National Insurance, to HMRC by the 22nd of the following tax month when paying electronically ^[13]. Software that holds the HMRC Recognised badge submits the FPS automatically and reconciles what is owed, which removes the two tasks a first-time employer is most likely to miss.

The pre-employment checks a first-time employer must make

Before the employee starts, a first-time employer has a short list of legal checks. Skipping any of them carries a direct financial penalty, so they belong at the front of the process, not the end.

Right to work checks

Every employer must check that a prospective employee has the legal right to work in the UK before employment begins ^[14]. The check is done by viewing original documents, using the Home Office online service, or using a certified identity service provider, and the employer keeps a dated record.

The penalty for getting this wrong is severe and recently increased. An employer who employs someone without the right to work can face a civil penalty of up to £60,000 per illegal worker ^[15]. A correct and documented right to work check is the employer's statutory excuse against that penalty, which is why it is the first check a sole trader should complete.

Employers' liability insurance

Employers' liability insurance is a legal requirement for almost every business with staff, and it must provide cover of at least £5 million from an authorised insurer ^[16]. A business that should be insured but is not can be fined £2,500 for every day it goes without cover, and a further £1,000 for failing to display or produce the certificate when asked ^[17].

There is a narrow exemption. A business that employs only a close family member does not need the insurance, though that exemption falls away the moment a non-family employee joins ^[18]. For a sole trader hiring a first unrelated employee, the insurance is a hard requirement that should be in place before the start date.

DBS checks where the role requires one

Some roles require a Disclosure and Barring Service check, in particular work with children or vulnerable adults ^[19]. The level of check depends on the role, ranging from a basic check available to any employer to enhanced checks for regulated activity ^[36]. Most first hires in retail, trades or hospitality will not need one, but a sole trader moving into care, tutoring or childcare must confirm the level of check the role demands before the employee starts.

Paying the employee legally

Paying staff legally means two things: paying at least the statutory minimum for the worker's age, and giving the employee the documents the law requires.

National Minimum Wage and National Living Wage

Every worker must be paid at least the statutory minimum for their age band. The rates rose on 1 April 2026, and the table below sets out the figures a first-time employer must apply ^[20].

The apprentice rate applies to apprentices under 19, or those aged 19 and over in the first year of their apprenticeship; after that an apprentice moves to the rate for their age ^[21]. Underpaying the minimum wage, even by accident through unpaid trial shifts or unlogged overtime, is one of the most common first-hire errors, and payroll software that applies the right rate by age reduces the risk.

Payslips and the written statement of particulars

Every employee has the legal right to an itemised payslip on or before payday, showing gross pay, deductions and net pay ^[22]. A sole trader who produces a one-off or occasional payslip can use an instant payslip generator rather than a full payroll subscription, but a regular employee needs a payslip every pay period.

The employee is also entitled to a written statement of employment particulars on or before the first day of work ^[23]. This document sets out pay, hours, holiday entitlement and notice, and it is a day-one right, not something that can be issued weeks later. Getting the statement ready before the start date is part of a compliant first hire.

Employer National Insurance and the Employment Allowance

Employing staff adds a cost that paying only the owner never did: employer National Insurance. The employer pays 15% on the employee's earnings above the Secondary Threshold of £5,000 a year from 6 April 2026 ^[24]. On a full-time first hire this is a real and recurring cost that belongs in the budget from the start. The mechanics are set out in a dedicated guide to payroll for SMEs.

The offset is the Employment Allowance. Eligible employers can reduce their annual employer Class 1 National Insurance bill by up to £10,500, drawn down automatically each payrun until the allowance is used up ^[25]. A sole trader employing one or more workers who are not directors can usually claim, which is a meaningful difference from a single-director company where the only employee is the director and the allowance cannot be claimed ^[26]. For many first-time employers the allowance covers the whole of the first year's employer National Insurance, so claiming it is one of the highest-value actions a new employer takes.

Auto-enrolment: a duty from the first eligible worker

Automatic enrolment is not optional and it is not limited to large employers. The day a sole trader takes on their first member of staff, they have automatic enrolment duties, and The Pensions Regulator's online tool confirms exactly what those duties are for the specific worker ^[27]. The duty applies whether the business expected to set up a pension or not.

The worker must be assessed on each payrun. An eligible jobholder is broadly a worker aged between 22 and State Pension age earning above the earnings trigger, and contributions are based on qualifying earnings in the band from £6,240 to £50,270 for the 2026-27 tax year ^[28]. The minimum total contribution is 8% of qualifying earnings, of which the employer pays at least 3% ^[29]. A first-time employer also has to complete a Declaration of Compliance to The Pensions Regulator within five months of the duties starting. The detail of how the band works is covered in the guide to auto-enrolment, and payroll software that assesses every worker automatically and connects to a scheme such as NEST, Smart Pension or The People's Pension turns the monthly duty into a background task.

Statutory pay obligations from day one

The first hire also brings statutory pay into the business. An employer is responsible for paying Statutory Sick Pay, and since the reform on 6 April 2026 it is due from the first day of sickness rather than the fourth, at £123.25 per week or 80% of average weekly earnings, whichever is lower ^[30]. The removal of the waiting days means a sole trader must account for SSP even on short absences.

Family-related statutory payments can apply too. Statutory Maternity Pay runs at 90% of average weekly earnings for six weeks and then at £194.32 per week or 90% of earnings if lower, with Statutory Paternity, Adoption and the newer parental payments sharing the £194.32 flat rate ^[31]. Most of these can be recovered from HMRC, and smaller employers can reclaim more than they pay out through Small Employers' Relief. A first-time employer rarely faces all of these at once, but the obligation exists from the first payday, and the detail of the sick pay reform is set out in the guide to the 2026 SSP changes.

Work out the cost of the first hire

Before fixing a salary, a sole trader can size the full cost of employment, including employer National Insurance on top of the wage, with the Moonworkers UK salary calculator, which applies the 2026-27 PAYE and National Insurance rules to any gross figure.

Conclusion

The first hire turns a one-person business into an employer, and the duties arrive together rather than in sequence. Registration before the first payday, a right to work check, employers' liability insurance, the correct minimum wage, a written statement, automatic enrolment and real-time reporting are all live from the moment the employee starts. None of them is individually difficult, but together they are the reason the first payrun feels heavier than every one that follows.

The business structure, though, is the part that does not change. A sole trader remains a sole trader with staff on the books, carrying the employer obligations of any company while keeping the simplicity of a sole trade. As the workforce grows, the recurring choice becomes how much of the monthly compliance to automate and how much to carry by hand, and that decision is where a first-time employer's time is best spent once the first payrun is behind them.

Frequently asked questions

Can a sole trader employ staff without becoming a limited company?

Yes. A sole trader can employ one or more people and still trade as a sole trader, keeping the same Self Assessment and Unique Taxpayer Reference ^[32]. The business does not have to incorporate to take on staff. The owner takes on the employer duties of PAYE, insurance and auto-enrolment, but the legal structure of the business is unchanged.

When does a sole trader need to register as an employer?

Registration must happen before the first payday, because the PAYE reference number arrives by post and is needed to report correctly ^[33]. An employer cannot register more than two months before the first payment to staff, so the safest approach is to register as soon as a start date and first payday are confirmed.

Does a sole trader with one employee need employers' liability insurance?

In almost all cases, yes. Employers' liability insurance of at least £5 million is a legal requirement, with a £2,500 daily fine for trading without it ^[34]. The only common exemption is a business that employs only close family members, and that exemption ends as soon as a non-family employee is hired.

Can a sole trader claim the Employment Allowance?

Usually, yes. A sole trader employing staff who are not directors can generally claim the Employment Allowance, reducing the annual employer National Insurance bill by up to £10,500 ^[35]. This is different from a single-director company whose only employee is the director, which cannot claim. For many first-time employers the allowance offsets most or all of the first year's employer National Insurance.

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