How to use this Hargreaves and Lansdown pension calculator
This tool helps you estimate what your pension could be worth at retirement based on your current pot, monthly inputs, and long-term assumptions. If you use a Hargreaves and Lansdown SIPP, these fields map closely to what you already track: contributions, employer payments, growth assumptions, and fees.
The model compounds monthly and then provides two core outcomes:
- Projected pension pot (nominal): the raw future amount in pounds.
- Projected pension pot (today’s money): the value adjusted for inflation.
What each input means
Current age and retirement age
Time is the most powerful variable in pension planning. Even small monthly contributions can become significant over 25 to 35 years because returns compound on both your original money and prior growth.
Current pension value
Include the value of your existing pension(s) that you expect to continue investing. If you have old workplace pensions, you may prefer to calculate them separately first, then combine for one estimate.
Monthly contribution, employer contribution, and tax relief
Personal pension contributions usually receive tax relief. In this calculator, your personal amount is treated as net, then the tax relief percentage is added. Employer contributions are added separately. Together, these create your monthly invested total.
Growth, fees, and inflation
The tool applies a net investment return equal to:
- Expected growth rate
- Minus platform and fund fees
It also estimates a “real” value by discounting for inflation. This helps you avoid overestimating the spending power of a large nominal figure decades from now.
Why this matters for Hargreaves and Lansdown investors
Hargreaves and Lansdown offers broad fund access, shares, ETFs, and pension drawdown options. But choice only helps if paired with clear targets. A practical calculator gives you a way to answer useful planning questions:
- “Am I on track for the retirement lifestyle I want?”
- “What happens if I increase contributions by £100 per month?”
- “How much do fees impact my long-term result?”
- “How much annual income might this pot support?”
Interpreting your projected income
The calculator includes an illustrative 4% annual withdrawal figure. This is a rough planning shortcut, not a guarantee. Real sustainable withdrawal rates depend on:
- Investment mix and volatility
- Retirement length
- Market conditions at retirement
- Whether you use drawdown, annuity, or a blend
Treat this as a starting point for scenario planning rather than a fixed promise.
Practical ways to improve your pension projection
1) Increase contributions gradually
A simple habit is to raise your monthly pension input each time your salary increases. Even a modest annual step-up can materially increase your final pot.
2) Capture full employer matching
If your workplace scheme offers matching above your current rate, this is often one of the highest-value actions available.
3) Keep fees under control
Fees are easy to ignore because they seem small each year, but over decades they can reduce outcomes by tens of thousands of pounds. Review fund and platform charges regularly.
4) Revisit assumptions annually
Update your pension plan at least once a year with your latest balance, contribution level, and a realistic return expectation. A pension is not “set and forget.”
Important UK pension considerations
- Annual allowance and potential tapering rules
- Money Purchase Annual Allowance rules after flexible access
- Tax treatment at withdrawal
- State Pension timing and entitlement
- Your wider assets (ISAs, cash, property, other pensions)
Because regulations can change, always verify current HMRC and provider guidance before making major decisions.
Final thought
The best pension calculator is the one you use regularly. Start with your best estimate today, run a conservative case and an optimistic case, and adjust your plan as your career and family goals evolve. Consistency beats perfection.