How an auto enrolment pension works in 2026/27: the £10,000 trigger, the £6,240 to £50,270 band your 8% is actually based on, and when opting out costs you.
There is a line on your payslip you have probably never questioned. It sits under the income tax and the National Insurance, it takes somewhere between £20 and £150 a month, and it is labelled something unhelpful like “Pension EE” or “AE Pens”. That line is your auto enrolment pension.
Since 2012, every UK employer has had a legal duty to put qualifying staff into a workplace pension and pay into it alongside them. Most people get enrolled without ever filling in a form, which is rather the point of the policy. It also means most people have no idea how the number is worked out, why it appears and disappears when their hours change, or what the famous £10,000 threshold actually applies to.
Here is the mechanism, with the real 2026/27 figures.
Your employer must put you into a workplace pension and pay into it themselves if you are aged 22 or over, under State Pension age, and earn more than £10,000 a year.
That is the entire rule. Everything else is detail about how those three tests get applied, and the detail is where variable-hours workers get caught out.
Two things about the trigger surprise people.
First, it is checked every pay period, not once a year. Eligibility for an auto enrolment pension is not a single annual verdict. Your employer assesses you against a pro-rated version of the £10,000 figure each time they run payroll. For 2026/27 that means £833 in a month, or £192 in a week.
So if you are on a zero-hours contract averaging £9,000 a year, but December was busy and you earned £950 that month, your employer has to enrol you for December. This is the single most common reason a pension deduction appears on a shift worker’s payslip out of nowhere. It is not an error, and it is not your employer being generous. It is the law working exactly as written.
Second, the £10,000 is only the trigger. It is not what your contributions are based on. Once you are in, the percentages apply to your qualifying earnings, which is the slice of your pay between £6,240 and £50,270. The first £6,240 is ignored, and so is anything above £50,270.
That distinction is worth internalising, because it means a pay rise does not increase your pension contributions proportionally. It increases them on the part of the rise that falls inside the band.
The legal minimum total is 8% of qualifying earnings. Your employer must pay at least 3% of that, and you cover the remaining 5%.
Take someone earning £24,000 a year, paid monthly.
But £74 a month is not what leaves your take-home pay, because part of your 5% is tax relief. Under a relief at source scheme, which is what Nest, The People’s Pension and Smart Pension all use, you pay 4% from your net wages and HMRC adds the rest:
So you give up £59.20 and roughly £118 arrives. That is the part people miss when they call it “money taken off my wages”. I have written a fuller breakdown of the top-up mechanism in the pension tax relief explainer.
Now the lower end. Someone earning £11,000 a year clears the trigger, but only £4,760 of their pay is qualifying earnings. Their total 8% is £380.80 a year, of which they personally fund about £15.87 a month after tax relief. Small, but their employer is adding £142.80 a year they would otherwise never see.
Nobody is forced to stay in an auto enrolment pension. You have a legal right to opt out, and one specific window matters enormously.
Within one month of enrolment, opting out means your employer must refund every penny you have contributed. Clean exit, no money trapped.
After that month, you can stop future contributions at any time, but what is already in the pot stays there until you reach the normal minimum pension age, which is 55 today and rises to 57 on 6 April 2028.
Here is what I would want anyone to weigh before opting out. The employer’s 3% is the whole argument. It is money that exists only because you are in the scheme, and it disappears the moment you leave. On the £24,000 example, opting out saves you £59.20 a month and costs you £118 a month of retirement savings. You are handing back a little under £600 a year of your employer’s money to keep £710 of your own.
There are situations where that trade is still the right call. If you are servicing debt at 30% interest, or you genuinely cannot make rent this month, keeping the £59 is defensible and nobody should make you feel bad about it. Short-term solvency beats long-term optimisation. But treat it as a temporary measure, not a decision.
One thing worth knowing if you do opt out: your employer has to put you back in roughly every three years. That is re-enrolment, it is compulsory for them, and you will need to opt out again each time. It is not your payroll team being pushy.
Four checks, in order of usefulness.
If your employer offers salary sacrifice as an alternative route into the same scheme, it is usually worth looking at, because it saves National Insurance as well as income tax. The salary sacrifice explainer covers where it helps and where it bites.
The short answer for this tax year: nothing changed. The Pensions Minister confirmed in December 2025 that all three auto enrolment thresholds stay at their 2025/26 levels for 2026/27. The trigger is still £10,000, the qualifying earnings band is still £6,240 to £50,270.
Because those figures are frozen while wages rise, more workers cross the trigger each year without anyone legislating for it. The freeze is doing quiet work.
What is genuinely coming is more interesting. The Pensions (Extension of Automatic Enrolment) Act 2023 gave the government the power to do two things: lower the enrolment age from 22 to 18, and scrap the £6,240 lower limit so contributions are calculated from the first pound you earn. Both would matter a lot to young shift workers and to anyone on part-time hours.
The catch is that the Act only granted the power. It did not set a date. The regulations that would actually bring either change into force have not been made, and the government committed to consulting on timing first. So it is a real change on the horizon, not a change you should plan around yet. If the lower limit goes, expect your contributions to rise noticeably, because that ignored first £6,240 would come into scope.
If you want to see what a workplace pension deduction does to your actual take-home pay at your hourly rate or salary, the NetPay app works it out alongside your income tax, National Insurance and student loan. Free to download.
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NetPay does this maths for every shift, invoice and payslip, automatically.
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No. £10,000 a year is the point at which your employer must enrol you automatically. If you earn between £6,240 and £10,000 you can still ask to join, and your employer has to put you in and pay their share. Below £6,240 your employer must let you join but does not have to contribute.
The legal minimum is 8% of your qualifying earnings, which is the slice of pay between £6,240 and £50,270 in 2026/27. Your employer pays at least 3% and you make up the other 5%, though part of your 5% is government tax relief rather than money from your take-home pay.
Yes, if you act quickly. Opt out within one month of being enrolled and your employer must refund every contribution you have made. After that month you can still stop paying in, but the money already in the pot stays there until you reach the minimum pension age.
Auto enrolment is assessed every pay period, not just once a year. If you are paid monthly, earning more than £833 in a single month can trigger enrolment even if your annual total is under £10,000. This catches a lot of shift and zero-hours workers after a busy month.
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NetPay UK works out your real net pay after tax, NI, pension and salary sacrifice, for hourly, shift and variable-income workers. Free to download.
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A note on financial advice: NetPay UK calculates take-home pay based on official HMRC tax rules. This article reflects rules in force at the time of publication (16 August 2026). Tax rules change. For complex situations, consult a qualified UK accountant or visit gov.uk/income-tax.
