Auto-enrolment has been part of the UK employment landscape since 2012, yet it still trips up small business owners every year. Whether you have taken on your first member of staff, inherited a payroll from a previous owner, or simply want to make sure you are meeting your 2026 obligations, this guide cuts through the jargon and gives you exactly what you need to know — and what you need to do.
What Is Auto-Enrolment and Who Does It Apply To?
Auto-enrolment is the legal requirement for UK employers to automatically enrol eligible workers into a qualifying workplace pension scheme and make contributions on their behalf. It is governed by The Pensions Regulator (TPR), and ignoring it is not an option — TPR has issued hundreds of thousands of compliance notices and fixed-penalty fines since the scheme began.
The rules apply to you if you employ at least one person. That includes part-time workers, temporary staff, and agency workers on your payroll — not just full-time employees. A sole trader with no employees is exempt, but the moment you hire someone, even on a casual basis, the clock starts ticking.
Your workers fall into three categories:
- Eligible jobholders — aged 22 to State Pension age, earning above £10,000 per year (£833/month). These must be automatically enrolled.
- Non-eligible jobholders — aged 16–21 or State Pension age to 74, or earning between £6,240 and £10,000. They can opt in and you must facilitate this.
- Entitled workers — earning below £6,240 per year. They can join a pension scheme, but you are not required to contribute.
These thresholds have remained frozen since 2021/22 and, as of mid-2025, the Government has confirmed no changes for the 2025/26 tax year. Keep an eye on any Autumn Budget announcements that could affect the 2026/27 position.
Minimum Contribution Rates in 2026
Since April 2019, the minimum total contribution rate has stood at 8% of qualifying earnings, split between employer and employee. In 2026, that split remains:
- Employer minimum: 3% of qualifying earnings
- Employee minimum: 5% of qualifying earnings (including any tax relief)
Qualifying earnings are calculated on the band of earnings between £6,240 and £50,270 per year. So for an employee earning £28,000 annually, qualifying earnings are £21,760 — and your 3% employer contribution works out at roughly £653 per year, or £54 per month.
You can choose to base contributions on a different definition of earnings — basic pay only, for instance, or total pay including overtime and bonuses — as long as the resulting pension pot is at least as generous as the qualifying earnings basis. Many payroll providers refer to this as a "certification" approach. If you are unsure which basis your current scheme uses, check with your pension provider or an accountant.
One thing worth flagging for 2026: the ongoing Pensions Review, launched by the Government in 2024, is examining whether minimum contribution rates should rise in future years. Nothing has been legislated yet, but it is sensible to model what a move to, say, a 5% employer contribution would mean for your wage bill now, rather than scrambling when any change is announced.
Your Key Employer Duties Step by Step
If you are a new employer or have just taken on your first member of staff, here is the practical sequence you need to follow:
- Find out your duties start date. For new employers, auto-enrolment duties begin on the first day you employ someone. TPR will write to you using your PAYE reference, so make sure HMRC has your correct correspondence address.
- Assess your workforce. On your duties start date — and then on every pay reference period — assess each worker against the three categories above.
- Choose a qualifying pension scheme. Popular options for small employers include NEST (the Government-backed scheme, free to use), The People's Pension, and Smart Pension. Your chosen scheme must meet TPR's quality requirements.
- Enrol eligible workers and write to them. You must enrol eligible jobholders within six weeks of their assessment date and send each worker a written communication explaining the scheme, contribution rates, and their right to opt out.
- Manage opt-outs and refunds. Workers have one calendar month from being enrolled to opt out. If they do so within that window, they are entitled to a full refund of any contributions deducted. You must re-enrol opted-out staff every three years — this is called re-enrolment or re-declaration.
- Complete your declaration of compliance. You must tell TPR that you have met your duties within five months of your staging or duties start date. Missing this deadline is one of the most common reasons small employers receive fixed penalty notices of £400.
Platforms like BizHub365 integrate full PAYE payroll with auto-enrolment support, helping small employers automate workforce assessments, track opt-outs, and generate the correct employee communications alongside each pay run — which significantly reduces the risk of missing a step.
Common Compliance Mistakes — and How to Avoid Them
TPR publishes enforcement data quarterly, and the same errors appear time and again among small employers. Here are the most frequent, and what to do about them:
- Failing to enrol workers on time. The six-week window applies from the assessment date, not from when you get round to it. Set a diary reminder the moment a new starter crosses the earnings or age threshold.
- Paying incorrect contributions. Using the wrong earnings definition, forgetting to include irregular payments such as commission, or simply not updating payroll when a worker's pay rises above £10,000 can all result in underpayments. TPR can require you to back-pay missing contributions with interest.
- Inducing opt-outs. It is illegal to encourage or pressure workers to opt out of auto-enrolment, offer a pay rise in exchange for opting out, or make opting out a condition of employment. Penalties can reach £50,000 for serious breaches.
- Missing re-enrolment. Every three years you must re-enrol any workers who previously opted out and are still eligible. Many small employers set up auto-enrolment correctly at the start and then forget this cyclical duty entirely.
- Ignoring postponement rules incorrectly. You can postpone assessment for up to three months for new starters, but you must write to the worker within six weeks of their start date to notify them of the postponement — even if you end up not enrolling them.
Penalties: What TPR Can Do If You Get It Wrong
The Pensions Regulator is not shy about enforcement. Its powers include:
- Compliance notices — requiring you to put things right within a set period.
- Fixed penalty notices — £400 for failing to comply with a compliance notice or for missing the declaration of compliance deadline.
- Escalating penalty notices — daily fines ranging from £50 per day for employers with 1–4 staff, up to £10,000 per day for larger organisations.
- Unpaid contribution notices — ordering you to pay any contributions that have been withheld, including employee contributions you deducted but never paid into the scheme.
The good news is that TPR generally takes a pragmatic approach with small employers who make honest mistakes and engage quickly. The danger zone is ignoring correspondence — the fines escalate fast once TPR starts chasing.
Conclusion: Stay Ahead of Your Obligations in 2026
Auto-enrolment is one of those employer duties that rewards preparation and penalises neglect. The rules are not complicated once you understand them, but the admin — assessing workers each pay period, managing opt-outs, keeping records, filing your declaration — adds up quickly if you are running payroll manually or using disconnected systems.
For 2026, the immediate priorities are: confirm your contribution rates are correct, check when your next re-enrolment window falls, and make sure your declaration of compliance is up to date. If you are a new employer, act from day one — TPR will not accept "I didn't know" as a defence.
If you want payroll and auto-enrolment managed from a single place, BizHub365 handles FPS and EPS submissions to HMRC, supports auto-enrolment assessments, and generates statutory documents like P60s and P45s — all without needing separate software. You can explore the platform at bizhub365.co.uk.
Get your pension duties right now, and they become a straightforward part of your monthly payroll routine rather than a source of stress and unexpected fines.