Workplace pension vs SIPP — which should you use?
Quick answer: A workplace pension comes with employer contributions you should not turn down — that's free money on top of your salary, often worth 3–10% of pay.
A workplace pension comes with employer contributions you should not turn down — that's free money on top of your salary, often worth 3–10% of pay. A Self-Invested Personal Pension (SIPP) gives you control over the underlying investments and is usually cheaper than older workplace schemes once your pot is into the high tens of thousands. Most UK savers end up with both: paying into the workplace pension to capture the full employer match, then topping up via a SIPP for the extra investment choice and (often) lower fees. The two share the same £60,000 annual allowance for 2026/27.
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Primary source: gov.uk/workplace-pensions
Workplace pension
Auto-enrolment means most UK employees aged 22+ earning over £10,000 are automatically enrolled into a workplace pension. The legal minimum is 8% of 'qualifying earnings' — 5% from you and 3% from the employer.
Many employers will pay more than the minimum if you do, often matching contributions up to 5%, 6% or even 10%. Not contributing enough to capture the full employer match is leaving free money on the table.
SIPP
A Self-Invested Personal Pension lets you choose the underlying investments — funds, shares, ETFs and more — and pick your own provider. Low-cost platform SIPPs typically charge around 0.20–0.45% per year.
Tax relief works the same way as any personal pension: 20% added at source, with higher- and additional-rate taxpayers able to reclaim more through Self Assessment.
Combining them
A common pattern: contribute enough to your workplace pension to receive the full employer match, then put any additional pension savings into a SIPP where you have more investment choice and often lower fees.
Watch the Annual Allowance — £60,000 a year combined across all your pensions. Tapered for high earners.
Salary sacrifice — the National Insurance angle
Most workplace pensions offer salary sacrifice: instead of being paid £100 and then contributing it, your gross salary is reduced by £100 and the employer pays it directly into the pension. The net effect is that you save National Insurance (8% basic-rate or 2% above the upper earnings limit) on top of the Income Tax saving.
For a basic-rate taxpayer, salary sacrifice turns a £100 contribution from costing £80 net into costing £72 net. For a higher-rate taxpayer, it goes from £60 net to £58 net (and is simpler than reclaiming the higher-rate relief through Self Assessment).
Many employers also pass on their saved employer NI (15% from 6 April 2025) into the pension. Ask HR — if yours does, sacrificing £100 lands as £115 in the pot.
SIPPs do not offer salary sacrifice — they only deliver Income Tax relief, not NI relief. That's the single biggest argument for using the workplace pension over a SIPP, even before the employer contribution.
Worked example — splitting £500 a month
A higher-rate taxpayer wants to save £500 a month for retirement. Their employer matches up to 6% of salary and they earn £60,000. To capture the full match they need to contribute 6% of £60,000 ÷ 12 = £300 a month into the workplace pension. The remaining £200 goes into a SIPP.
After tax relief, employer match and (with salary sacrifice) NI saving, the £300 workplace contribution can result in well over £500 landing in the pension. The £200 SIPP contribution becomes £250 after basic-rate relief, with another £50 reclaimable via Self Assessment for a higher-rate taxpayer.
Same monthly outlay, materially more in the pension — purely because the workplace match and salary sacrifice are being used.
Common questions
- Should I opt out of auto-enrolment?
- Usually no. Opting out means giving up employer contributions and tax relief — typically 5–10% of your salary in 'free money' on top of what you pay in.
- Can I transfer my workplace pension to a SIPP?
- Sometimes — defined contribution pensions are normally transferable, but check for guaranteed annuity rates or other valuable features before transferring. Defined benefit (final salary) transfers usually require regulated advice.
- Do SIPP fees eat my returns?
- Modern platform SIPPs charge around 0.20–0.45% per year for the wrapper, with fund charges (usually 0.05–0.30% for index funds) on top. Total cost is typically under 0.5% per year — much lower than older personal pensions.
- Is the employer match capped?
- The legal minimum employer contribution is 3% of qualifying earnings, but most employers cap their match at a percentage of salary — often 5%, 6% or 10%. Contributing above the cap doesn't trigger any extra employer contribution; it just goes in as your own money.
- Are SIPP contributions also reported to HMRC?
- Yes — providers report Gross Contributions to HMRC, which is how basic-rate relief is added automatically. Higher- and additional-rate taxpayers claim the extra through Self Assessment (or by writing to HMRC if they don't file a return).