UK Pension Calculator 2025/26

Estimate how much your pension pot could be worth at retirement. See the impact of your contributions, employer matching, and investment growth over time.

This calculator provides simplified estimates and does not account for inflation, investment fees, variable returns, tax relief, or annuity rates. Actual pension outcomes will differ. This is not financial advice — consult a qualified financial adviser or use Pension Wise (the government’s free guidance service) for personalised pension planning.

How UK Pensions Work in 2025/26

A pension is a tax-efficient way to save for retirement. You contribute money during your working life, it’s invested and (hopefully) grows over time, and you access it from age 55 (rising to 57 from April 2028). The main advantage is tax relief – the government effectively tops up your contributions.

Most UK employees are automatically enrolled into a workplace pension. The minimum total contribution is 8% of qualifying earnings (earnings between £6,240 and £50,270), split as 5% from the employee and 3% from the employer. Many employers offer more generous matching schemes – for example, matching your contributions up to 5% or even 10%.

Types of Pension

Defined contribution (DC): The most common type for private sector workers. You and your employer contribute to a pot that’s invested in funds. What you get at retirement depends on how much was contributed and how the investments performed. This calculator models a DC pension.

Defined benefit (DB): Also called a final salary or career average pension. Your retirement income is based on your salary and years of service, not investment performance. These are increasingly rare in the private sector but still common in the public sector (NHS, teachers, civil service).

Self-Invested Personal Pension (SIPP): A DC pension you manage yourself, choosing your own investments. Popular with the self-employed and those wanting more control over their pension investments.

Tax Relief on Pension Contributions

Pension contributions receive tax relief, meaning the government adds money to your pension based on your tax rate. A basic rate taxpayer contributing £100 only pays £80 — the £20 difference is added by HMRC. For higher rate taxpayers, the effective cost of a £100 contribution is just £60 (though you need to claim the extra £20 through self-assessment).

With salary sacrifice, both you and your employer save on National Insurance too, which can add another 8–13.8% in savings depending on the arrangement.

The annual allowance for pension contributions is £60,000 for 2025/26 (or 100% of your earnings, whichever is lower). Exceeding this triggers a tax charge.

Accessing Your Pension

From age 55 (57 from April 2028), you can access your DC pension. You can take 25% as a tax-free lump sum and use the remaining 75% in several ways: buy an annuity (guaranteed income for life), enter drawdown (keep the pot invested and take withdrawals), take lump sums as needed, or any combination.

Withdrawals beyond the 25% tax-free amount are taxed as income. The right strategy depends on your other income, tax situation, and how long you need the money to last.

Worked Examples

Example 1
Starting at 25, retiring at 67 

Current pot: £0.
Monthly contribution: £250 (you) + £150 (employer) = £400 total.
Growth rate: 5% per year.
After 42 years, your pot could be worth approximately £640,000.
Of that, roughly £201,600 is contributions and £438,400 is investment growth.
Taking 25% tax-free gives you £160,000 as a lump sum, with the remaining £480,000 providing roughly £19,200 per year over 25 years (before tax and not accounting for continued investment growth in drawdown).

Example 2
Starting at 40, catching up 

Current pot: £50,000.
Monthly contribution: £500 (you) + £250 (employer) = £750 total.
Growth rate: 5%.
After 27 years to age 67, your pot could be worth approximately £557,000.
The later start means more money needs to come from higher contributions rather than compound growth.

Example 3
The power of employer matching 

If your employer matches your contributions up to 5%, and you earn £40,000, contributing 5% (£167/month) means your employer adds another £167/month.
That’s £334/month total instead of £167 – your pension pot doubles in size with no extra cost to you. Over 30 years at 5% growth, that’s the difference between roughly £139,000 and £278,000.

Common Mistakes to Avoid

  1. Not contributing enough to get full employer matching. If your employer matches up to 5% and you only contribute 3%, you’re leaving free money on the table. This is the closest thing to a guaranteed return in investing.
  2. Cashing out when changing jobs. Transferring your pension to a new employer’s scheme or a SIPP preserves your tax-efficient savings. Cashing out means paying income tax on the withdrawal plus a potential 55% tax charge if you’re under 55.
  3. Being too conservative too early. If you’re decades from retirement, a cautious investment strategy with heavy bond allocation means you miss out on the higher long-term returns of equities. Target-date funds automatically shift to more conservative allocations as you approach retirement.
  4. Ignoring the State Pension. The full new State Pension is £230.25 per week (2025/26), or roughly £11,973 per year. You need 35 qualifying years of National Insurance contributions to get the full amount. Check your State Pension forecast at gov.uk to see what you’re on track for.

The pension calculator works alongside the take-home salary calculator – together they show your full picture of earnings now versus income in retirement.

Pension growth is essentially compound interest at work – see the compound interest calculator to understand how compound interest works in other contexts.

Frequently Asked Questions

How much should I save for retirement?

A common guideline is to halve the age at which you start saving and use that as the percentage of your pre-tax salary to save. Start at 20? Save 10%. Start at 30? Save 15%. Start at 40? Save 20%. These are rough guidelines — the right amount depends on your desired retirement lifestyle and other assets.

Can I access my pension before 55?

Only in exceptional circumstances such as terminal illness. Be extremely wary of anyone offering early pension access — it’s almost always a scam, and you could lose most of your savings to fees and tax charges.

What happens to my pension if I die?

DC pensions can be inherited. If you die before 75, your beneficiaries receive the pot tax-free. After 75, they pay income tax on withdrawals. Making sure your pension provider has an up-to-date expression of wish (nomination form) is important — pensions don’t automatically follow your will.

Should I consolidate old pensions?

If you have several small pension pots from previous employers, consolidating them into a single SIPP can make management easier and potentially reduce fees. However, check for any valuable guarantees (like guaranteed annuity rates) before transferring — once lost, these can’t be recovered.