Opting out for three years at 30 costs roughly £11,900 of employer money by the time you reach 65, on a £32,600 salary. That is the employer's share alone, before counting your own contributions or the tax relief on them. Everything else about auto-enrolment is mechanics.
Who gets enrolled
Your employer must enrol you automatically if all three apply: you are 22 or over but under State Pension age, you earn at least £10,000 a year, and you work in the UK.
Miss one of those and you are not enrolled, but you may still have rights. If you are 16 to 21, or between State Pension age and 74, and you earn above £6,240, you can ask to join and your employer must enrol you and pay its share. Below £6,240 you can still ask to join, but the employer is not obliged to contribute.
Auto-enrolment covers employees, not the self-employed. If you run a limited company and pay yourself a salary above the trigger, you are your own employee and the rules apply to you. Sole traders and partners are outside it entirely and have to arrange their own pension.
What gets paid in
Contributions are calculated on qualifying earnings, which for 2026/27 is the slice of pay between £6,240 and £50,270 a year. Pay outside that band does not count toward the minimum.
The statutory minimum is 8% of qualifying earnings: 5% from you, 3% from your employer.
| Salary | Qualifying earnings | You (5%) | Employer (3%) | Total |
|---|---|---|---|---|
| £30,000 | £23,760 | £1,188.00 | £712.80 | £1,900.80 |
| £32,600 | £26,360 | £1,318.00 | £790.80 | £2,108.80 |
| £50,000 | £43,760 | £2,188.00 | £1,312.80 | £3,500.80 |
Your 5% is a gross figure and includes tax relief. Under relief at source, the most common arrangement, you pay 4% out of net salary and the provider reclaims the other 1% from HMRC.
Qualifying earnings include salary, commission, bonuses, overtime, statutory sick pay and statutory parental pay. They exclude benefits in kind, expense reimbursements and redundancy payments.
Note what the upper end of the band does. Above £50,270 nothing further counts, so on a minimum scheme a rise from £55,000 to £70,000 adds nothing at all to your pension. Employers can and often do use a more generous definition of pensionable pay, which is covered in employer pension contributions.
Opting out, and what it costs
You have one month from enrolment to opt out. Do it inside that window and anything already deducted is refunded in full, treated as though you were never a member. You opt out through the pension provider, not your employer, and your employer has to give you the details.
Leave after the month and it is not an opt-out, it is ceasing membership. Contributions already made stay in the pot.
Your employer is legally barred from encouraging you to opt out. No incentives, no pressure, and it cannot be a condition of the job. The Pensions Regulator takes reports of it.
The cost is worth seeing as a number rather than a warning. On a £32,600 salary the employer puts in £790.80 a year. Opt out for three years from age 30 and you forgo £2,372.40 of cash, which would have been worth about £2,493 by the time you restarted, and roughly £11,900 by 65 if it grew at 5% a year. Include your own contributions and the same three years is closer to £31,700 of pot at 65. (Assumes 5% growth every year and a flat salary, neither of which happens; it is a scale check rather than a forecast.)
Re-enrolment
Roughly every three years your employer has to put you back in, whether or not you opted out before. The date hangs off the third anniversary of the employer's own staging date, and they can pick a point within a six-month window around it.
Re-enrolment restarts the whole cycle, including a fresh one-month opt-out window. It exists because most opt-outs happen during a temporary squeeze, and without a nudge people rarely go back on their own.
Postponement
An employer can delay enrolment by up to three months, which is common for new starters and people on probation. No contributions are made during postponement.
They must write to you within six weeks of the postponement starting, giving the date you will be enrolled and telling you that you can opt in earlier. If you ask to join during postponement, they have to enrol you and start contributing. Postponement can be used only once per job.
The 8% problem
Auto-enrolment is described as setting a floor. In practice it sets an anchor, and almost nobody moves off it. That is our reading of the design rather than a claim about your scheme, and plenty of people would argue the anchor is still better than the near-zero participation that preceded it.
The gap is easy to size. On £32,600 of salary, contributing the 8% minimum for 35 years at 5% growth produces around £190,000. Twelve per cent produces around £286,000. The extra four points costs you a little over £1,000 a year of gross pay and is worth roughly £95,000 at the end.
The first place to look is your employer's matching structure. If they match to 5% or 6% and you are contributing 5% against a 6% cap, you are declining part of your salary every payday for nothing.
Model your own figures with the pension calculator rather than the percentages in a benefits handbook, and see UK workplace pension explained for how the scheme itself works.
Thresholds: GOV.UK, workplace pensions. This page explains the rules and is not personal advice; your scheme's own terms take precedence.
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