How SIPPs Work UK 2026/27 — The Complete Beginner's Guide

What a SIPP actually is

A Self-Invested Personal Pension is a UK pension wrapper with two defining features. First, you control the investment choices — you pick funds, ETFs, shares, and where they're held. Second, the tax mechanics are identical to a workplace pension: tax relief on contributions, tax-free growth, taxed income on withdrawal.

The "self-invested" part is what distinguishes it from a workplace pension (where the employer picks a scheme, usually with a default fund) and a traditional personal pension (where a provider picks and manages).

The tax mechanics — the whole reason SIPPs exist

Contribution

Personal contributions attract tax relief at your marginal rate up to the annual allowance.

• Basic-rate (20%): You pay £800 into your SIPP. HMRC automatically adds £200. £1,000 invested.
• Higher-rate (40%): Basic-rate relief still automatic (+£200). Additional £200 claimed via Self Assessment. Effective cost £600 for £1,000 invested.
• Additional-rate (45%): Same again — additional £50 via Self Assessment. Effective cost £550 for £1,000 invested.

Growth

Investments inside a SIPP grow free of Capital Gains Tax and dividend tax. No annual reporting to HMRC.

Withdrawal

Currently accessible from age 55 (rising to 57 in April 2028). 25% is available as tax-free lump sum (up to £268,275 under Lump Sum Allowance). The remaining 75% is taxed as income at your marginal rate at time of withdrawal.

The annual allowance

• Standard annual allowance: £60,000 (2026/27) or 100% of relevant UK earnings, whichever is lower.
• Tapered allowance: reduced for very high earners (adjusted income over £260,000).
• Carry forward: unused allowance from previous 3 years can be added if you have the earnings.
• Employer contributions also count against the annual allowance.

See our Pension allowances guide for the full picture.

Who a SIPP is for

• Self-employed people without a workplace pension.
• Employed people topping up beyond workplace contributions.
• Higher-rate taxpayers wanting to capture full tax relief.
• Anyone consolidating multiple old workplace pensions.
• DIY investors wanting broader investment choice than workplace defaults.

Who should probably not use a SIPP

• People whose workplace pension employer match they aren't using — fill the match first.
• People who don't want to make investment decisions — a workplace default might be simpler.
• Defined Benefit (final salary) scheme members considering transferring out — usually a bad trade.
• Anyone with pension pot approaching legacy Lifetime Allowance protection — professional advice needed.

How to open a UK SIPP

1. Pick a provider — see our Best SIPP UK comparison.
2. Complete the online application — typically 10-15 minutes for a UK resident with a NI number.
3. Fund the SIPP by bank transfer or by transferring an existing pension.
4. Pick investments (funds, ETFs, individual shares).
5. Set up regular monthly contributions.

What you can hold in a SIPP

• UK funds (OEICs, unit trusts).
• UK-listed ETFs (UCITS).
• UK-listed shares.
• International shares on many platforms.
• Investment trusts.
• Bonds.
• Commercial property (only on specialist SIPPs — not most retail platforms).

SIPP fees

Same fee layers as any UK investment platform:

• InvestEngine SIPP — 0% platform fee on DIY ETF portfolios.
• Hargreaves Lansdown SIPP — 0.45% on funds (tiered), capped £200 on shares/ETFs.
• AJ Bell SIPP — 0.25% on funds, capped £120 on shares/ETFs.
• Interactive Investor SIPP — flat £12.99/month.
• Vanguard Investor UK SIPP — 0.15% capped at £375.

Consolidating old pensions

Most SIPPs accept transfers from old workplace and personal pensions. Benefits:

• Single login for retirement money.
• Often lower fees than legacy schemes.
• Simpler retirement planning.

Check for safeguarded benefits (guaranteed annuity rates) before transferring — these are valuable and typically shouldn't be given up. See our Pension transfer guide.

Common mistakes

• Not claiming higher-rate tax relief through Self Assessment.
• Consolidating pensions with valuable safeguarded benefits.
• Contributing above the annual allowance without checking carry forward.
• Choosing a SIPP without matching platform to portfolio (funds on fund-friendly platforms, ETFs on ETF-friendly platforms).
• Not naming beneficiaries — pension death benefits require the provider to know where money should go.

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Frequently asked questions

How much can I put in a SIPP?

Up to £60,000 per year or 100% of your relevant UK earnings, whichever is lower. Tapered down for very high earners.

Can I access SIPP money before 55?

No, except in exceptional circumstances (terminal illness, small pot rules). Age gate rises to 57 in April 2028.

Are SIPPs safer than workplace pensions?

Both are regulated. SIPPs give more investment choice but require you to manage. Workplace pensions are simpler but have a limited default fund range.

Do SIPPs work for the self-employed?

Yes — SIPP is the primary retirement vehicle for UK self-employed workers without a workplace scheme.

Should I consolidate old pensions into a SIPP?

Often yes, but check for safeguarded benefits (guaranteed annuity rates) and defined-benefit components first.