Pension Calculator UK — Estimate Your Retirement Pot
Estimate the size of your pension pot at retirement with our free UK pension calculator. Enter your current age, target retirement age, existing pension pot, monthly contributions from you and your employer, expected growth rate and annual management charge. The calculator projects your total pot, contributions breakdown and what that might provide as annual retirement income.
Planning for retirement early makes an enormous difference thanks to compound growth. A 25-year-old contributing £200 per month with a £100 employer match at 5% growth could build a pension pot of over £400,000 by age 67. Starting the same contributions at 40 yields roughly £170,000 — less than half. This calculator helps you set a realistic target, understand the impact of employer matching and see how management fees erode your returns over decades. It is never too early or too late to check whether you are on track.
How UK Workplace Pensions Work
Since 2012, UK employers have been required to automatically enrol eligible workers into a workplace pension scheme. The minimum total contribution is 8% of qualifying earnings: you pay 5% (reduced to 4% after tax relief) and your employer pays 3%. Many employers offer to match higher contributions, which is essentially free money added to your pension pot. Contributions receive tax relief at your marginal rate, meaning a basic-rate taxpayer effectively gets £1.25 in their pension for every £1 of take-home pay contributed, while a higher-rate taxpayer gets £1.67.
The annual allowance for pension contributions is £60,000 (or 100% of your earnings if lower). Contributions above this limit lose their tax relief. For detailed guidance on workplace pension rules, contribution limits and your rights, see the GOV.UK workplace pensions page.
The Power of Starting Early
Compound growth means that money invested early in your career has decades to grow. A 25-year-old investing £300 per month at 5% net growth accumulates roughly £300,000 by age 67. A 40-year-old investing the same amount has only £150,000 at 67 — half as much, despite contributing for 27 years instead of 42. The extra 15 years of compounding more than doubles the result. Even if you can only afford small contributions now, starting early and increasing later is far more effective than waiting until you earn more.
To see how compound growth works in more detail, use our compound interest calculator. If you are also saving outside your pension in an ISA, the ISA calculator helps you model tax-free returns on those contributions.
Understanding the State Pension
The full new State Pension is £221.20 per week (£11,502 per year) for 2024/25 and rises annually under the triple lock guarantee (by the highest of inflation, average earnings growth or 2.5%). To receive the full amount, you need 35 qualifying years of National Insurance contributions. With 10 qualifying years you receive a partial pension. The State Pension alone is unlikely to fund a comfortable retirement, which is why private pension savings are essential. A comfortable retirement typically requires an income of £37,000 or more per year for a couple, according to the Pensions and Lifetime Savings Association.
Employers must enrol eligible workers into a workplace pension. Minimum: 8% of qualifying earnings (5% you, 3% employer). Opting out means losing employer contributions and tax relief.
Generally no. The minimum age is 55, rising to 57 in 2028. Early access only for severe ill health. Beware of scams offering early pension access.
Halve your age when you start and contribute that percentage. Start at 30, aim for 15% of salary including employer match. The 8% minimum is a starting point.
£221.20/week (£11,502/year) for 2024/25. You need 35 qualifying years of National Insurance. State Pension age is 66, rising to 67 by 2028.
Contributions get 20%-45% tax relief. At withdrawal, 25% is tax-free. The remaining 75% is taxed as income at your marginal rate.
This calculator provides estimates for guidance only. Investment returns are not guaranteed and your pension pot could be worth less than projected. This is not financial advice. For regulated financial advice, speak to a qualified pension adviser or independent financial adviser.