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UK auto-enrolment explained: employer pension duties, minimum contributions, and The Pensions Regulator

UK auto-enrolment explained: employer pension duties, minimum contributions, and The Pensions Regulator
Emmanuel Amegah

Emmanuel Amegah

September 15, 2026

Workplace pension auto-enrolment requires every UK employer to automatically enrol eligible workers into a qualifying pension scheme and make minimum contributions. There is no opt-out for employers — the duty exists from the day the first eligible worker is paid. The Pensions Regulator (TPR) enforces compliance with thousands of penalty notices annually, including to employers who thought they had completed their duties correctly but missed cyclical re-enrolment or failed to declare compliance on time.

The Five Core Employer Duties

  1. Assess the workforce — determine which workers are eligible, non-eligible, or entitled.
  2. Enrol eligible workers automatically into a qualifying pension scheme.
  3. Make minimum contributions on qualifying earnings.
  4. Communicate with workers via required information letters within statutory timeframes.
  5. Register with TPR and declare compliance within 5 months of the duties start date, and re-declare every 3 years.

Workforce Assessment: Three Categories

Eligible jobholders (must be auto-enrolled)

Age 22 to State Pension age, earning over £10,000/year (£833/month), working in the UK. Must be enrolled without waiting for them to ask.

Non-eligible jobholders (enrol if they request it)

Workers either: aged 16-21 or State Pension age to 74 earning above £10,000; or aged 22 to State Pension age earning £6,240 to £10,000. Enrol within one month of request; employer contributions are required.

Entitled workers (enrol if they request it — no employer contribution required)

Aged 16 to 74 earning below £6,240/year. Right to join a scheme; no employer contribution obligation.

The Duties Start Date

For new employers, the duties start date is the date the first worker is paid — not the company formation date. The 5-month window to declare compliance begins immediately from this date.

Qualifying Pension Schemes

The scheme must be registered with HMRC, have a tax-relief mechanism, and meet TPR minimum standards. Common options:

  • NEST: Government-backed, no setup cost, available to all employers.
  • Master trust schemes: The People's Pension, NOW: Pensions, Smart Pension.
  • Group personal pensions (GPP): Insurance company products common among larger employers.

Minimum Contribution Rates (2026/27)

Party Rate Base
Employer 3% Qualifying earnings
Employee 5% Qualifying earnings
Total 8%

Qualifying earnings: Earnings between £6,240/year (lower threshold) and £50,270/year (upper limit). Only earnings within this band attract mandatory contributions.

Example: Employee earning £30,000/year. Qualifying earnings = £30,000 - £6,240 = £23,760. Employer contribution = 3% x £23,760 = £712.80/year.

Employers may use alternative certification bases (total earnings, basic pay) provided the scheme meets TPR's alternative quality requirements.

Opting Out

Employees can opt out within one month from enrolment. Employers must process valid opt-out notices from the scheme provider — not self-drafted forms. Employers cannot encourage or induce opt-outs (criminal offence under the Pensions Act 2008).

Cyclical Re-Enrolment

Every 3 years from the original duties start date, employers must re-enrol all eligible workers who have previously opted out. The re-enrolment date falls within a 6-month window around the 3-year anniversary. A re-declaration of compliance must be submitted to TPR within 5 months of the re-enrolment date.

TPR Declaration of Compliance

Initial declaration: Within 5 months of the duties start date.

Re-declaration: Within 5 months of the cyclical re-enrolment date.

Missing the declaration deadline triggers a £400 fixed penalty per responsible director/trustee, with escalating daily penalties (£50 to £10,000/day depending on employer size) for continued non-compliance.

Contribution Timing

Contributions must be paid to the scheme by the 19th of the month following the deduction. Late contributions generate compliance notices independently of enrolment status.

Penalties

Failure Penalty
Late declaration of compliance £400 fixed penalty
Continued non-compliance after notice £50 to £10,000/day
Inducing opt-outs Up to £50,000 civil penalty; criminal prosecution for persistent offenders
Failure to re-enrol at cyclical date £400 fixed penalty escalating

Common Mistakes

1. Missing the duties start date for the first UK hire. Auto-enrolment duties begin on the first pay date — not when the employer decides to set up a pension scheme. The 5-month declaration window starts immediately.

2. Not tracking the cyclical re-enrolment date. The 3-year obligation is tied to the original duties start date, not a calendar anniversary. Missing the window means missing the re-declaration deadline too.

3. Using a non-qualifying scheme. Contributions paid into a non-qualifying scheme do not satisfy auto-enrolment duties. The employer remains in breach and may face refund obligations.

4. Processing opt-outs incorrectly. Opt-outs require a valid opt-out notice from the scheme provider. Informal requests are not valid — the employee remains enrolled.

5. Not submitting the re-declaration after cyclical re-enrolment. Re-enrolling opted-out workers is only half the obligation. The re-declaration to TPR must also be submitted within 5 months.

How Cadana Supports UK Payroll Compliance

Tracking auto-enrolment eligibility, processing enrolments and opt-outs within statutory timeframes, making qualifying earnings contributions, managing cyclical re-enrolment dates, and supporting TPR declaration submissions — Cadana's global payroll tax engine handles the full UK auto-enrolment compliance cycle at the API layer.

Book a demo at cadanapay.com/book-demo to see how it works in practice.

Sources and References

Emmanuel Amegah

Emmanuel Amegah