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Understanding pensions in the UK: what you're building and why it matters

Most people in their 20s and 30s know pensions are important but don't understand how they work. Here is the clear explanation.

How workplace pensions work

Auto-enrolment (introduced 2012) means most UK employees are automatically enrolled in a workplace pension. The minimum contribution is 3% from the employer and 5% from the employee (total 8% of qualifying earnings). The money is invested in funds managed by the pension provider and grows tax-free. Crucially: not contributing enough to get the full employer match is leaving free money unclaimed. Always contribute at least enough to get the full employer match.

The state pension

The full new State Pension is £221.20/week (2024–25) — approximately £11,500/year. You need 35 qualifying National Insurance years for the full amount. Check your State Pension forecast at gov.uk using the 'Check your State Pension' service. Gaps in NI contributions (for career breaks, self-employment) can often be filled voluntarily — this is frequently excellent value.

Why starting early matters so much

A pension pot of £500/month started at 25 grows to approximately £1.8 million by 65 (at 7% average annual growth). Starting at 35 with the same contribution produces approximately £920,000. Starting at 45: approximately £430,000. The 20-year head start nearly doubles the outcome. Use our free pension tracker to see what you're building.

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Frequently asked questions

Can you pay into a pension if you're self-employed?
Yes — through a SIPP (Self-Invested Personal Pension). You don't get employer contributions, but you do get tax relief at your marginal rate (20% basic rate = for every £80 you contribute, £100 goes into the pension; higher-rate taxpayers claim the additional 20% through self-assessment). There is no automatic enrolment for self-employed people — you must set it up proactively.
What happens to your pension if your employer goes bust?
Defined contribution (DC) workplace pensions are held separately from the employer and protected up to 100% by the Financial Services Compensation Scheme (FSCS) if the pension provider fails. The employer going bust does not affect the pension pot. Defined benefit (DB / final salary) pensions have different protections through the Pension Protection Fund.