Pension Calculator
A workplace pension combines three things that do not exist together in any other mainstream savings vehicle: tax relief on your own contributions, an employer contribution on top, and long-term investment growth compounding over what is often decades. This calculator projects your pension pot at retirement and the estimated income it could provide, alongside the full State Pension, so you can see a realistic total retirement income picture rather than just a pot size in isolation.
Pension Calculator
Project your pension pot and retirement income based on your contributions for 2026/27.
Projected values are estimates. Investment returns are not guaranteed. Always seek regulated financial advice for pension decisions.
The Tax Relief That Arrives Before Any Growth Happens
Pension tax relief is genuinely different from investment growth — it is an immediate boost the moment you contribute, not a return that depends on markets performing well. At the basic rate, contributing effectively costs you 80p for every £1 that lands in your pension, since the government adds the remaining 20p directly, regardless of what happens to investment performance afterward. This calculator shows this relief explicitly as its own line, separate from investment growth, since it is worth understanding as a guaranteed, immediate benefit rather than conflating it with the genuinely uncertain investment returns that follow.
This distinction is genuinely worth internalising, since it means a pension contribution has already delivered a real, guaranteed 25% uplift on the net amount you actually paid in, before a single pound of investment growth has happened — a benefit no standard investment account or ISA offers on the way in, regardless of how well any of them subsequently perform.
Why Your Employer’s Contribution Is Free Money You’d Be Turning Down
Under auto-enrolment, employers are required to contribute a minimum alongside your own contribution, commonly 3% of qualifying earnings against a 5% employee minimum — and many employers offer more, sometimes matching your own contribution above the statutory minimum if you choose to contribute more yourself. This employer money is not conditional on investment performance and does not need to be repaid; it is a direct addition to your pot for simply being employed and enrolled. Opting out of a pension scheme, or contributing less than the level needed to unlock an employer’s full matching contribution, means genuinely leaving free money on the table that would otherwise have been added automatically.
Checking your specific employer’s matching policy directly, rather than assuming the statutory minimum is all that is available, is genuinely worth the few minutes it takes — some employers match contributions considerably above the legal minimum, and simply not knowing this is a common, entirely avoidable way to leave meaningful additional money unclaimed.
Seeing a 37-Year Projection in Real Numbers
A 30-year-old on £38,000, contributing the auto-enrolment minimum of 5% with a 3% employer match, retiring at 67, projects to a pension pot of roughly £324,400 after 37 years of growth at an assumed 5% annual rate. Converted at an indicative annuity rate, that pot could produce an income of around £17,840 a year, which combined with the full State Pension of roughly £12,550 gives a total estimated retirement income close to £30,390 — just under the PLSA’s £31,300 benchmark for a moderate single retirement, illustrating how close minimum auto-enrolment contributions can get to that widely cited target over a full career, without ever contributing above the statutory minimum.
From Pot to Income: What an Annuity Rate Actually Means
A pension pot at retirement is not itself an income — it needs converting into one, and this calculator uses an indicative annuity rate to show what a lump sum might realistically produce as an annual income if converted that way. An annuity is one option among several at retirement, alongside drawdown, which keeps the pot invested and withdrawn from flexibly, or a combination of approaches. The specific rate used here is indicative and genuinely varies by provider, your age, and prevailing market conditions at the actual point of retirement, so treat the resulting income figure as a reasonable order-of-magnitude estimate rather than a guaranteed number.
Pension or ISA — Not Necessarily an Either/Or
Pensions and ISAs are both tax-advantaged, but in genuinely different ways: pension contributions get tax relief going in, with tax generally applying to income taken out later, while ISA contributions receive no upfront relief but produce completely tax-free income when eventually withdrawn. Many people benefit from using both — a workplace pension up to at least the level that captures full employer matching, alongside an ISA for additional saving with more flexible access before retirement age. Our Investment Calculator is useful for modelling general investment growth outside a pension wrapper specifically, and our ISA Growth Calculator covers the ISA side of this comparison in more depth.
Frequently Asked Questions
Do higher-rate taxpayers get more pension tax relief?
Yes — higher and additional-rate taxpayers can claim relief at their marginal rate, though the additional relief above the basic 20% typically needs to be claimed through Self Assessment rather than being applied automatically at source.
Is there a limit to how much I can contribute with tax relief?
Yes — the annual allowance caps tax-relieved pension contributions, currently generally £60,000 or 100% of earnings if lower, with a lower allowance applying to some higher earners, so it is worth checking your specific position for larger contributions.
Can I access my pension before the state retirement age?
Generally from age 55, rising to 57 from 2028, you can begin accessing a private pension, though this is separate from and typically earlier than State Pension age, which is a different, later age entirely.
Does this calculator account for fund charges?
No — it projects growth at the gross rate you enter. Actual pension fund charges reduce the net return, so it is worth checking your specific scheme’s charges and factoring them into your own expectations for the final pot size.
What happens to my pension if I change jobs?
You can typically leave it invested where it is, transfer it to your new employer’s scheme, or consolidate it into a personal pension, each with different considerations worth checking before deciding, particularly around any exit fees or loss of specific benefits.
Important Information
This calculator provides an estimate based on the assumptions you enter and does not constitute financial advice. Annuity rates, investment growth and tax rules can all change, and pension pots can fall as well as rise in value. For advice specific to your circumstances, consult a qualified financial adviser. See our Disclaimer for further information.