The pros and cons of opting out of your workplace pension — how auto-enrolment works, what you'd lose, when it might make sense, and how to opt back in.
·4 min read
Auto-enrolment means most workers are automatically put into a workplace pension. But should you stay in — or opt out? Here’s what you’d gain and lose.
How Workplace Pension Auto-Enrolment Works
Feature
Detail
Who is auto-enrolled?
Workers aged 22 to State Pension age, earning £10,000+ per year
Minimum employee contribution
5% of qualifying earnings
Minimum employer contribution
3% of qualifying earnings
Total minimum contribution
8% of qualifying earnings
Qualifying earnings band
£6,240–£50,270 (2025/26)
Opt-out period
First month after enrolment
Re-enrolment
Every ~3 years, your employer must re-enrol you
What You’d Lose by Opting Out
Benefit you lose
Value
Employer contribution (3%+)
Free money — your employer pays into your pension on top of your salary
Tax relief (20%–45%)
Government adds 20% to your contribution (higher for higher/additional rate taxpayers)
Compound growth
Returns on invested money compound over decades
Long-term retirement income
Could mean tens of thousands less in retirement
The Numbers at Different Salaries
Annual salary
Your contribution (5%)
Employer contribution (3%)
Tax relief (20%)
Total going into pension monthly
If you opt out, you lose this much per month
£20,000
£57
£34
£14
£105
£48 (employer + tax relief)
£25,000
£78
£47
£20
£145
£67
£30,000
£99
£59
£25
£183
£84
£35,000
£120
£72
£30
£222
£102
£40,000
£140
£84
£35
£259
£119
£50,270
£183
£110
£46
£339
£156
Based on qualifying earnings band. Actual amounts depend on your employer’s pension scheme.
Long-Term Impact of Opting Out
Scenario
Pension pot at 67 (start age 25, 5% growth)
Full contributions (8% of £30,000 qualifying earnings)
~£250,000
Employee only (5%, no employer match)
~£155,000
Opt out entirely
£0
Opt out for 5 years, then rejoin
~£195,000 (lost ~£55,000)
Even a few years opted out can cost tens of thousands due to lost compounding.
When Opting Out Might Make Sense
Situation
Why it might be rational
But consider
Very high-interest debt (20%+)
Paying off debt saves more than pension gains
Opt back in as soon as debt is cleared
Unaffordable essential costs
You genuinely can’t cover rent/food
Explore benefits, debt advice first
Already maxing pension contributions
You’re hitting the £60,000 annual allowance
Very unlikely at auto-enrolment level
Leaving the job imminently
Less than a month — you’ll be refunded anyway
Check if new employer has auto-enrolment too
Already have substantial pension provision
Multiple pensions and well on track for retirement
Still unusual to benefit from opting out
When You Should NOT Opt Out
Situation
Why
To have more spending money
You’re giving up 94p+ to gain £1 of take-home pay
“I’m young, I’ll start later”
Early contributions grow the most due to compounding