Pension & SIPP Calculator

Planning for retirement can feel overwhelming, but a pension calculator is one of the quickest ways to find out whether you’re on track. Whether you’re saving into a workplace pension, a personal pension or a Self-Invested Personal Pension (SIPP), our free calculator helps estimate how much your pension could be worth when you retire and whether you’ll have enough income to support your lifestyle.

Selected Value: 4 %
Selected Value: 25 years
What your pension will be worth when you retire.
What you have paid into your pension.
How much profit your pension investments have made.

How To Use Our Pension & SIPP Calculator

This guide explains what information you’ll need, how the calculator works and how to understand your results.

What does the Pension & SIPP Calculator do?

Our Pension & SIPP Calculator estimates:

  • How much your pension pot could be worth at retirement.
  • Your projected annual retirement income.
  • Whether you’re on track to meet your retirement goals.
  • How increasing contributions or retiring later could improve your retirement income.

Rather than guessing whether you’re saving enough, the calculator gives you a personalised projection based on your own circumstances.

What information do you need?

Before you start, it’s helpful to have the following details:

  • Your current age.
  • The age you’d like to retire.
  • The current value of your pension or SIPP.
  • How much you contribute each month.
  • How much your employer contributes (if applicable).
  • Your annual salary (if requested).
  • Any other retirement income you expect to receive.

Don’t worry if you don’t know every figure exactly. Pension calculations are estimates, so reasonable approximations are usually sufficient.

Step 1: Enter your current age

Your age is one of the biggest factors affecting your retirement savings.

The earlier you start investing, the longer your money has to benefit from compound investment growth. Even small monthly contributions made over several decades can grow into a substantial pension pot.

Step 2: Choose your retirement age

Next, enter the age you hope to retire.

This determines how many years your pension has left to grow before you start drawing an income.

Try experimenting with different retirement ages. Delaying retirement by just a few years can often make a significant difference because:

  • Your investments have longer to grow.
  • You’ll usually contribute for longer.
  • Your pension needs to provide income for fewer years.

Step 3: Enter your current pension value

This is the total value of all your defined contribution pensions or SIPPs.

You can usually find this on your latest pension statement or by logging into your pension provider’s online account.

If you have several pensions, you can either:

  • Add their values together.
  • Run separate calculations for each pension.

If you’ve lost track of an old pension, it’s worth finding it before calculating your retirement income, as many people have forgotten pension pots from previous employers.

Step 4: Add your monthly pension contributions

Enter how much you currently save each month.

If you’re employed, include:

  • Your own pension contributions.
  • Your employer’s contributions where possible.

If you’re using the calculator for a SIPP, simply enter your own monthly contributions.

One of the most useful features of the calculator is testing different contribution levels. Increasing monthly contributions—even by £50 or £100—can have a surprisingly large impact over several decades thanks to compound growth.

Step 5: Review your projected pension income

Once you’ve entered your information, the calculator estimates:

  • Your projected pension pot.
  • Your estimated annual retirement income.
  • Whether you’re likely to have enough to fund your retirement.

Remember these are forecasts rather than guarantees. Investment returns, inflation and future pension rules can all affect the final outcome.

How much income will you need?

Everyone’s retirement is different.

However, the latest Retirement Living Standards suggest that a single person currently needs approximately:

  • £13,900 per year for a minimum retirement lifestyle.
  • £32,700 per year for a moderate retirement.
  • £45,400 per year for a comfortable retirement.

Couples generally need higher combined incomes, although shared living costs reduce the amount needed per person. These figures provide a useful benchmark when comparing your projected retirement income.

What if you’re not on track?

If the calculator suggests you may fall short of your retirement income target, don’t panic.

There are several ways to improve your retirement prospects:

  • Increase your monthly pension contributions.
  • Make additional one-off pension payments.
  • Maximise employer matching contributions if available.
  • Consolidate old pension pots where appropriate.
  • Delay retirement by a few years.
  • Review your investment strategy.

Even relatively small increases made early can make a meaningful difference over time.

Why use a SIPP calculator?

A Self-Invested Personal Pension (SIPP) gives you greater control over how your retirement savings are invested.

If you invest through a SIPP, using a pension calculator helps answer important questions such as:

  • Am I saving enough?
  • What could my pension be worth at retirement?
  • How much monthly income could it provide?
  • What happens if I increase my contributions?
  • Can I afford to retire earlier?

Running different scenarios can help you make informed decisions long before retirement.

Remember: A pension calculator is only an estimate

No pension calculator can predict the future with complete accuracy.

Investment returns, inflation, tax rules and your personal circumstances may all change over time. That’s why it’s worth reviewing your pension every year and updating your calculations as your salary, savings and retirement plans evolve.

The earlier you start planning, the more options you’ll have—and the easier it is to make small changes today that could significantly improve your retirement income tomorrow.

Ready to start your pension? Choose a UK FCA-regulated pension provider

Good Money Guide’s experts have tested and reviewed the UK’s top FCA-regulated private pension providers, helping you choose with confidence.
Scroll to Top