SIPP vs workplace pension — when adding a SIPP makes sense

Most UK employees end up with both — a workplace pension from their employer and (often) a SIPP they’ve opened themselves. The two work under the same overall tax rules, but they look and behave quite differently in practice. This is when each one helps, and when one starts to do the heavy lifting.

It’s educational, not advice. Pension choices have long-term consequences and individual circumstances vary a lot — speak to a regulated adviser or use the free MoneyHelper service for a personalised view.

The two wrappers in a sentence

Workplace pension: a pension your employer sets up, contributes to, and runs through a single nominated provider. You’re auto-enrolled, the employer matches some of your contribution, and the underlying investments are usually a set of default funds curated by the scheme.

SIPP (Self-Invested Personal Pension): a pension you open yourself, with a platform of your choosing, and direct the investments inside. Same tax wrapper rules, but you make the choices.

Both get the same headline tax treatment: contributions reduce your taxable income or attract tax relief; growth inside the pension is tax-free; 25% can be taken as a tax-free lump sum at retirement (subject to the Lump Sum Allowance of £268,275); the remainder is taxed as income when drawn.

What the workplace pension is good at

Three things, mostly:

1. The employer match

This is the single biggest reason the workplace pension comes first in the UK personal finance order. Most employers match contributions up to some level — common patterns are 3-and-3, 5-and-5, or higher. The match is free money in the most literal sense — your employer pays only if you contribute.

A 5% employer match on a £40,000 salary is £2,000 a year of additional contributions, on top of the £2,000 you pay yourself. That’s a 100% return on your contribution before any investment growth.

No SIPP can replicate this — your employer doesn’t contribute to your SIPP. Always capture the full match before anything else.

2. Salary sacrifice (in some schemes)

Many workplace schemes offer salary sacrifice — your contractual salary is reduced by the contribution amount, and the employer pays it into the pension instead. The mechanical result is that both employee NI and employer NI are saved on the sacrificed amount. Some employers pass their NI saving (currently 15% on the sacrificed amount) into your pension as well; many don’t.

Salary sacrifice is generally more tax-efficient than relief-at-source contributions to a SIPP at the same amount, for the same person, because the NI saving stays with you (or your pot). Run the numbers through our salary sacrifice calculator for the specific comparison.

SIPPs cannot use salary sacrifice — the contractual arrangement is between you and your employer, not you and your SIPP provider.

3. Low or no fees

Workplace pensions are negotiated by the employer (or by The Pensions Regulator’s default fund standards). Annual management charges typically range from 0.30% to 0.75%, with no platform fee, no dealing fees, and no transfer charges. For most employees this is competitive with the best SIPP options once SIPP platform fees are included.

The cost structure isn’t always optimal but is usually reasonable — especially compared to a SIPP holding actively-managed funds.

What the SIPP is good at

Three things the workplace scheme typically doesn’t do well:

1. Investment choice

Most workplace schemes have 10–30 fund options, with a default fund (often a target-date or lifestyling strategy) chosen for the average member. The choice is sometimes limited to the scheme provider’s own fund range.

A SIPP gives access to a much wider range: individual shares, ETFs, investment trusts, bonds, gilts, and funds from any provider on the platform. For investors who want a low-cost global index ETF (typical OCF 0.10–0.20%), a SIPP can be cheaper than the workplace default — once platform fees are factored in.

2. Consolidation

People accumulate pensions across multiple employers. A typical UK worker changes jobs 6–8 times in a career; each job brings a new workplace pension. Five small pots in five providers means five sets of admin, five default funds, and five times the annual statement to track.

A SIPP can be the consolidation vehicle: transfer the old workplace pensions into it, and the running cost of administration drops. (Old pensions with valuable guarantees — particularly defined benefit pensions — should not be transferred without proper regulated advice. The risk of giving up a guarantee accidentally is real.)

3. Control

Some investors like making their own asset allocation decisions. A SIPP lets you do this — pick your equity/bond split, choose your geographic mix, rebalance to taste. Whether this produces better results than the default is a long debate; what it does provide is engagement, which can itself encourage higher contributions.

When the SIPP starts to make sense (on top of the workplace pension)

A few situations where opening a SIPP alongside the workplace scheme is worth considering:

• You’ve already captured the full employer match and have more to contribute.
• Your workplace scheme has high fees or limited investment choice — a SIPP can be cheaper for the marginal pound.
• You’re self-employed — there’s no workplace scheme, so a SIPP is the only pension wrapper available.
• You’re moving employer and want to consolidate — the SIPP can be the destination.

A situation where the SIPP usually doesn’t help:

• You’re below the employer match threshold. Every spare pound should go into the workplace pension to capture more match before any goes into a SIPP.

The tax relief mechanic

A note on how tax relief flows differently in the two wrappers:

• Workplace pension via salary sacrifice: contribution is taken before income tax and NI. Full relief at your marginal rate is automatic, plus NI saved.
• Workplace pension via net pay arrangement: contribution is taken before income tax (after NI). Full income tax relief is automatic; NI is not saved.
• Workplace pension via relief at source: contribution is taken from net (post-tax) pay. The pension provider claims back 20% basic-rate relief and adds it to the pot. Higher/additional rate taxpayers reclaim the rest via Self Assessment.
• SIPP: always relief at source. The provider adds 20% to your contribution; higher/additional rate is reclaimed via Self Assessment.

For higher-rate taxpayers using a SIPP, claiming the extra relief through Self Assessment is essential — without it, the SIPP is materially less tax-efficient than a salary-sacrifice workplace pension.

The £60,000 annual allowance — shared, not separate

A frequent misconception: the £60,000 annual allowance is across all your pensions combined — workplace, SIPP, AVCs, every UK-registered pension you contribute to. It’s not £60,000 each.

For high earners, the tapered annual allowance reduces this from £60,000 down to £10,000 once adjusted income exceeds £260,000. For anyone who’s flexibly accessed a DC pension, the MPAA caps DC contributions at £10,000 a year.

A reasonable pattern

For most UK employees in a standard workplace scheme:

1. Contribute to capture the full employer match in the workplace pension.
2. If you have more to save and want low-cost investing, open a SIPP and direct further contributions there.
3. Use salary sacrifice in the workplace pension if it’s offered and the employer passes through any NI saving.
4. Claim higher-rate or additional-rate tax relief on any SIPP contributions via Self Assessment.
5. Consider consolidating old workplace pensions into the SIPP when you change jobs — but never transfer DB pensions without advice.

The pattern can flex with circumstances. Our pension auto-enrolment guide covers the workplace mechanics in more depth.

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Last updated 22 May 2026. This guide is educational and is not personal financial advice. Pension decisions can’t easily be undone — speak to a regulated adviser or MoneyHelper before transferring or restructuring. See our disclaimer.