Compliance 9 min read 12 April 2026

Onboarding Checklist for New Employees in the UK (2026 Edition)

Getting UK onboarding right means hitting legal requirements and making a great first impression. This checklist covers both — from right to work checks on day one to the 90-day milestone review.

UK employment law places specific obligations on employers when they bring on a new hire. Miss them and you are exposed to fines, tribunal claims, or Home Office penalties. But compliance is only half the story — a truly effective onboarding checklist also covers the experience that makes someone want to stay.

This checklist covers everything from legal must-dos to best-practice milestones. Use it as a template — or use OnboardSwift to automate every item on it.

Before Day One (Pre-boarding)

  • Issue written statement of particulars (required by day 1 under the Employment Rights Act 1996, as amended 2020)
  • Complete right to work check (must happen before or on the first day — not after)
  • Collect signed employment contract
  • Send HMRC Starter Checklist (formerly P46) — or collect P45 from previous employer
  • Register new employee on payroll with correct tax code
  • Request and verify ID documents (passport, BRP, share code)
  • Set up email and system access before start date
  • Assign equipment and arrange delivery or collection
  • Send welcome pack and first-day logistics

£20,000

maximum civil penalty per illegal worker for failing a right to work check

UK Home Office (2024)

Day One

  • Confirm right to work check documents in person (if not done remotely)
  • Issue contract and any outstanding documents for wet or e-signature
  • Introduce to line manager and immediate team
  • Walk through company handbook, policies, and code of conduct
  • Complete mandatory health and safety briefing
  • Grant access to all required systems
  • Set clear expectations for the first week

Week One

  • Assign onboarding buddy or mentor
  • Deliver role-specific compliance training (GDPR awareness, data handling, sector-specific)
  • Introduce to key stakeholders and cross-functional contacts
  • Share 30/60/90-day goals in writing
  • Confirm pension auto-enrolment and provide opt-out information (The Pensions Regulator)
  • Check in informally at end of week one

30-Day Milestone

  • Formal 30-day check-in with line manager
  • Review progress against first-month goals
  • Confirm any outstanding documents are completed
  • Collect new hire feedback on onboarding experience
  • Adjust workload or support if needed

90-Day Milestone (End of Probation)

  • Conduct probation review meeting
  • Confirm probation outcome in writing
  • Set objectives for next quarter
  • Archive onboarding documentation per your data retention policy
  • Transition to standard performance management process

Automate the Checklist — Stop Running It Manually

This checklist works perfectly as a one-pager for a single hire. But if you are hiring more than a handful of people per year, manually working through it every time creates errors, delays, and compliance gaps.

UK-ready onboarding, automated from day one

OnboardSwift automates every item on this checklist — right to work, document collection, GDPR training, probation reminders — for every hire, every time.

Start your free 14-day trial

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