HR for Startups and Early-Stage UK Businesses

Most startup founders do not think much about HR until something goes wrong. This guide tells you what you legally need from day one, what to do in your first year, and which mistakes to avoid while the team is still small enough to fix them easily.

Your Legal Obligations as a First-Time Employer

Before Anyone Starts

Right to work check. You must check that every employee or worker has the right to work in the UK before their start date. This means checking original documents (passport, visa, share code) and keeping a copy. If you skip this and employ someone who does not have the right to work, the civil penalty is up to £60,000 per illegal worker.

Employment contract. Issue a written statement of employment particulars on or before day one. This is a legal requirement. The statement must include: job title, start date, salary and pay frequency, hours of work, holiday entitlement, notice period, pension details, and disciplinary/grievance procedure reference.

Employer's liability insurance. Legally required as soon as you have one employee. Minimum cover £5 million. Failure to have it carries a £2,500 per day fine.

Within the First Month

Register as an employer with HMRC. You need to register before you make your first payroll run. Set up PAYE and report payroll to HMRC via Real Time Information (RTI) each pay period.

Auto-enrolment assessment. Assess each worker's eligibility for workplace pension. Workers aged 22-66 who earn above £10,000 per year must be auto-enrolled. You also have a legal duty to contribute (minimum 3% employer contribution). Your staging date or duty start date is the date your first employee starts.

Employee liability insurance certificate. Display it, or make it available to employees.

Ongoing Obligations

• Pay at least National Minimum Wage (check rates at GOV.UK - they increase every April)
• Provide statutory sick pay when employees meet the eligibility criteria
• Give statutory minimum holiday (5.6 weeks per year, including bank holidays)
• Comply with working time regulations (48-hour average working week, 11-hour daily rest, 20-minute break for shifts over 6 hours)

First 12 Months: What to Do and When

Month 1-3: Get the Basics Right

1. Issue compliant contracts before anyone starts
2. Complete right to work checks and file copies
3. Set up payroll - use a payroll provider rather than doing it manually
4. Register for auto-enrolment and enrol eligible workers
5. Get employer's liability insurance
6. Draft a basic disciplinary and grievance procedure (ACAS provides free templates)
7. Set up a basic system for tracking leave - even a shared spreadsheet beats nothing

Month 3-6: Build Basic Processes

8. Create an offer letter template so every hire gets consistent written terms
9. Build a simple onboarding checklist so new starters know what to expect in week one
10. Set up a personnel file system (paper or digital - GDPR compliant either way)
11. Review your NMW calculations - are you catching all workers including those on variable hours?
12. Consider an HR software tool - many are free or low-cost below 10 employees

Month 6-12: Plug the Gaps

13. Get probation reviews in place for every new hire (typically 3-6 months)
14. Have your first pay review - even if you cannot give rises, benchmarking matters
15. Review your auto-enrolment contributions - are you correctly assessing re-enrolment?
16. Draft a data protection / privacy notice for employees (GDPR requirement)
17. Assess whether any employees are approaching two years' service (at which point unfair dismissal rights kick in)

Common Startup HR Mistakes

Misclassifying Workers

The most expensive mistake in startup HR. If someone works regular hours for you, works primarily for you, and you control how and when they work - they are almost certainly an employee or worker, not a self-employed contractor.

The consequences of getting this wrong:

• HMRC can demand unpaid PAYE, NI, and potentially penalties going back years
• The person can claim worker rights (holiday pay, minimum wage) or employment rights (unfair dismissal)
• Courts and tribunals look at the reality of the working relationship, not what the contract says

If in doubt, take employment law advice before bringing someone on board as a contractor.

No Written Contracts

Some founders skip contracts to move fast or because they trust the person. This is a false economy. Without a written contract:

• Your notice period is unclear (statutory minimum applies, which may not be what you agreed)
• Confidentiality and IP assignment terms may not be enforceable
• Holiday pay and other terms are disputed based on verbal agreements that are hard to prove
• You have no clear basis for a disciplinary process

A basic employment contract can be drafted for £200-400 by an employment solicitor. It is a one-time cost that protects you indefinitely.

Ignoring Probation

Probation is not legally required. But without a properly structured probation period and a formal review, you lose your best opportunity to exit someone who is not working out without a full dismissal procedure.

A properly run probation means:

• A set period (typically 3 or 6 months)
• A mid-probation review and a final probation review
• Written confirmation of the outcome (pass, extend, or terminate)
• A clear notice period during probation (can be shorter than post-probation notice)

Do not just let probation periods lapse without a formal decision. That is when problems start.

Avoiding Hard Conversations

Startup culture often prioritises positivity and team cohesion. This is valuable. It becomes a problem when it means performance issues are never directly addressed.

The pattern is always the same: a founder notices an issue, avoids the conversation hoping it will resolve, the issue gets worse, the founder finally addresses it but now the employee is surprised and feels blindsided, the formal process is longer and more painful than it needed to be.

The rule is simple: address performance and conduct issues as early as possible, as directly as possible. Document the conversation. Follow up in writing. That is the entire foundation of fair dismissal process.

No Policies in Place

You do not need a 50-page employee handbook in month one. But you do need:

• Disciplinary procedure (ACAS Code requirement)
• Grievance procedure (ACAS Code requirement)
• Health and safety policy (once you reach 5 employees)
• Sickness absence policy

Everything else can wait until you are bigger. These cannot.

When to Get External Help

Startups should not be doing employment law unaided. The three most useful types of external support:

Employment law solicitor (one-off): For reviewing your contract template, advising on employment status, or navigating a specific complex situation. Not expensive for one-off queries.

HR retainer service: Services like WorkNest, Citation, or Peninsula give you a helpline, document templates, and employment law updates for a monthly fee. Good value below 25 employees.

Fractional HR professional: A part-time HR consultant on a retainer basis. Better than a phone helpline because they own work rather than just advise on it. Useful when you are 10-20 employees and hiring regularly.

This is guidance, not legal advice. For specific employment law queries, consult an employment solicitor or ACAS.