Most UK workers end up with a workplace pension whether they planned for it or not—auto-enrolment ensures it. A SIPP is the bolt-on most people don’t think about until they are older, more established, or specifically looking for control over their investments.
This article compares the two wrappers in 2026, walks through when each one wins on its own, and shows the common pattern that combines both for maximum benefit—which is the right answer for more readers than either pure choice.
What each wrapper actually is
A workplace pension is set up by your employer through a chosen provider—NEST, The People’s Pension, Aviva, Aegon, Standard Life, and so on. Your contributions and theirs go in via payroll. The provider holds your investments, usually in a “default fund” with a small selection of alternatives.
A SIPP (Self-Invested Personal Pension) is set up by you with a platform of your choice. You direct the contributions, you choose the investments, you control the platform. Your employer does not normally pay into a SIPP.
Both are pension wrappers in the UK tax system. Both get income tax relief on contributions. Both are accessible from age 57 (rising). Both fall under the same £60,000 annual allowance.
Fees: who is actually cheaper
This is where it depends on your specific workplace scheme.
Modern workplace pensions, set up since 2014 under auto-enrolment rules, are required to charge no more than 0.75% per year on the default fund. In practice, large employers negotiate lower:
| Provider | Typical default fund cost (2026) |
|---|---|
| NEST | 0.30% admin + 1.8% on each contribution |
| The People’s Pension | 0.50% all-in |
| Aviva (large employer schemes) | 0.30–0.45% |
| Aegon (corporate) | 0.30–0.50% |
| Scottish Widows | 0.30–0.50% |
A low-cost SIPP can be cheaper:
| SIPP | Platform fee | Fund OCF (e.g. global index) | Total |
|---|---|---|---|
| Vanguard Investor SIPP | 0.15% (capped £375/yr) | 0.13% (HSBC FTSE All-World) | 0.28% |
| AJ Bell SIPP | 0.25% (capped £120/yr on shares/ETFs) | 0.13% | 0.38% |
| Interactive Investor SIPP | £12.99/month (Pension Builder) | 0.13% | flat fee + fund |
| Hargreaves Lansdown SIPP | 0.45% (capped £200/yr on ETFs) | 0.13% | 0.58% |
Below £30,000 invested, the default workplace pension is often cheaper than a SIPP. Above £100,000, low-cost SIPPs typically pull ahead.
Older workplace pensions—particularly schemes set up pre-2014, or those in the public sector for non-DB members—sometimes charge 0.8–1.2% all-in. In those cases the SIPP almost always wins on cost.
Investment choice
A workplace pension offers:
- A default fund, usually a “lifestyle” fund that gradually shifts from equities to bonds as you approach retirement.
- A shortlist of 5–20 alternative funds—UK equity, global equity, bond funds, ethical/ESG options.
A SIPP offers, depending on the platform:
- All UK-listed funds, ETFs, and investment trusts.
- Direct UK and international shares.
- Cash holdings.
For someone who wants more than the workplace shortlist—particularly anyone interested in low-cost global index funds, factor tilts, or specific sector exposures—the SIPP wins decisively.
For someone happy with a target-date or lifestyle fund, the workplace default is usually fine.
Employer matching: the killer feature of workplace pensions
Most UK employers match contributions up to a cap. Common patterns:
- 3% match on 5% employee contribution (the auto-enrolment minimum).
- 5% match on 5% employee contribution.
- “Pound for pound” up to 10%.
- Higher levels for senior staff—e.g. 12% match on 6% contribution.
Employer matching is free money. Anything less than the maximum match leaves cash on the table.
A worked example: someone earning £50,000 with a 5%-on-5% match contributes £2,500 and receives £2,500 from the employer. Over 30 years, the employer half (compounded at 5% real) is worth around £170,000 in today’s money.
A SIPP gets no employer match unless the employer specifically agrees to contribute, which is rare.
Salary sacrifice
Salary sacrifice is usually only available through a workplace pension. You give up part of your salary in exchange for an employer contribution. Tax savings:
- Income tax at marginal rate.
- Employee NI (8% on basic-rate, 2% above the upper earnings limit).
- Employer NI (15%—sometimes partially returned to you).
For a basic-rate taxpayer, salary sacrifice can take the net cost of £100 in the pension down to £60 or below.
A SIPP does not typically support salary sacrifice—you contribute from net income, get tax relief at 20% added automatically, and reclaim higher-rate relief via Self Assessment. The total relief is the same as direct contribution to a non-salary-sacrifice workplace pension, but lower than a salary-sacrifice workplace contribution because you do not recover NI.
Tax relief mechanics
Both wrappers give the same headline tax relief, but the mechanics differ:
| Mechanic | How it works |
|---|---|
| Net pay (most workplace pensions) | Contribution deducted before tax; you see lower income on payslip |
| Relief at source (SIPPs and some workplace) | Contribution deducted after tax; provider reclaims 20% from HMRC; higher-rate relief via Self Assessment |
For higher-rate taxpayers, net pay schemes are preferable because the higher-rate relief comes through automatically via PAYE. With relief-at-source you have to reclaim it on Self Assessment—which most basic-rate-only employees don’t even know they need to do.
If your workplace pension is relief-at-source, double-check that you are filing for the higher-rate top-up if you are a higher or additional-rate taxpayer. It is worth £20–£25 per £100 contributed.
Consolidation
A SIPP makes it easy to consolidate old pensions. You can transfer in:
- Old workplace pensions from previous employers.
- Personal pensions (Group Personal Pensions, stakeholder pensions).
- Most defined contribution schemes.
You generally cannot transfer:
- Defined benefit (final salary) pensions—and in most cases, you should not even if you could.
- Pensions with guaranteed annuity rates (a valuable historic feature).
For the consolidation process, see consolidating old pensions UK.
The common pattern: use both
Most financially organised UK workers use both wrappers:
- Workplace pension—contribute enough to get the full employer match. Use salary sacrifice if available.
- SIPP—any further pension saving goes here, where you control the investments and the platform.
A worked example. A £60,000 earner with 5%-on-5% employer matching:
- Workplace pension: 5% from you (£3,000) + 5% from employer (£3,000) = £6,000.
- SIPP: another £4,000/year of personal contribution to round out at a 12% saving rate.
The £6,000 in the workplace earns the match. The £4,000 in the SIPP gives you investment control over a meaningful chunk of your retirement portfolio.
When to use only the workplace pension
If:
- Your employer matches well above the 5% minimum.
- The default fund is low-cost (under 0.5% all-in).
- The investment choice meets your needs.
- You don’t have time or interest to manage a SIPP.
Stick with the workplace pension and contribute as much of your auto-enrolment cap as possible.
When to use only a SIPP
If:
- You are self-employed (no workplace pension available).
- Your employer does not match contributions.
- You want full control over investments and platform.
- You have multiple old pensions to consolidate.
A SIPP is usually the right vehicle.
A practical decision framework
| Situation | Use |
|---|---|
| Employed, generous matching, basic-rate taxpayer | Workplace pension only |
| Employed, generous matching, higher-rate taxpayer | Workplace pension + SIPP for any extra |
| Employed, modest matching, want investment control | Both—match in workplace, extras in SIPP |
| Self-employed | SIPP only |
| Older with multiple pensions | Consolidate into SIPP, keep current workplace pension active |
The right answer for almost everyone employed in the UK is to use both, with the workplace pension funded at least to the maximum match.
For the broader retirement planning context, see our UK pensions and retirement guide.
Frequently asked questions
- Can I have both a workplace pension and a SIPP?
Yes. Many UK workers do. The £60,000 annual allowance applies across both, and you get tax relief on contributions to either. Most financially organised workers max employer matching in their workplace pension, then add a SIPP for further saving.
- Are SIPP fees lower than workplace pension fees?
It depends. Modern workplace pension defaults charge 0.3–0.6% all-in. Low-cost SIPPs (Vanguard, AJ Bell) can be 0.15–0.45% all-in. Older workplace pensions from before auto-enrolment can charge 1%+, in which case a SIPP usually wins on cost.
- Can my employer pay into my SIPP?
Yes, though it is uncommon. Most employers prefer to pay into their group workplace pension scheme. If your employer agrees to pay into your SIPP, you can use salary sacrifice to maximise tax efficiency.
