How Much Will Your Pension Actually Be Worth? Use This Free Calculator to Find Out
- Alpesh Patel
- 2 days ago
- 5 min read
Most people have a rough idea of what is in their pension.
Very few have run the actual numbers.
There is a significant difference between knowing your current pot size and understanding what it will actually be worth at retirement — factoring in your growth rate, your fees, your contribution schedule, and the years you have left. Most UK pension holders are operating on instinct and hope. The numbers, when you finally look at them, are often uncomfortable.
Alpesh Patel OBE is a hedge fund manager, Bloomberg TV alumnus, Financial Times author, and former Visiting Fellow at Corpus Christi College, Oxford. He built the pension growth calculator at campaignforamillion.com/tools to give UK investors the clarity their pension provider never has.
Why Most Pension Projections Are Meaningless
Your pension provider sends you a statement once a year. It shows your current pot value, a single projected figure at retirement, and usually very little else.
The problem is what that projection does not show you:
What the same pot would be worth if it grew at a different rate — say, 11% instead of 6%
How much of your final pot is consumed by annual management charges compounding silently over 20 years
What a 1% improvement in annual return would add to your retirement wealth — often six figures
The gap between your current trajectory and the income you actually want in retirement
Your provider has no incentive to show you the comparison. The pension growth calculator at campaignforamillion.com does exactly that.
The Compounding Gap: A £200,000 Example
Take a £200,000 SIPP with 20 years until retirement.
At 6% annual growth (a typical default managed pension fund, net of charges), that pot becomes approximately £641,000.
At 9.5% annual growth (a reasonable long-run expectation for a well-constructed, low-cost equity portfolio), that same pot becomes approximately £1,240,000.
At 13% annual growth (the long-run historical track record of the GIP quantitative framework), that pot becomes approximately £2,330,000.
Same starting pot. Same 20 years. The difference between the worst and best outcome is £1.69 million. Run these numbers for your own pot — with your own timeline and contribution rate — using the free calculator at campaignforamillion.com/tools.
What the Calculator Shows You
The pension growth calculator at campaignforamillion.com/tools is built around three questions that your pension provider never answers side-by-side:
1. What is your pension currently on track to deliver?
Enter your current pot size, your assumed annual growth rate (use your provider's historical return if you have it — the average UK managed pension has returned 6–7% net over the last decade), your years until retirement, and any ongoing contributions. The calculator shows you precisely what you are on track for.
2. What would a better growth rate add?
Adjust the growth rate slider and watch the projection change in real time. This is where most people have their moment of clarity. A 3% annual improvement — entirely achievable by switching from a managed fund to a disciplined self-directed approach — often adds between £300,000 and £700,000 to the final pot on a meaningful starting balance.
3. What does the fee drag actually cost you?
Enter your current annual management charge and compare it against the cost of a self-directed SIPP platform (typically 0.2–0.45%). The fee drag figure alone — independent of any performance difference — is often a six-figure number over a 20-year horizon.
Why This Matters More in 2026 Than It Ever Has
State pension age is rising. Final salary schemes are closed to new entrants for the vast majority of workers. The entire burden of retirement provision has shifted from the employer and the state onto the individual — and onto the decisions that individual makes in the next 10 to 20 years.
In that context, the growth rate your pension achieves is not a minor detail. It is the single most important variable in your retirement outcome. A 1% improvement in annual return, maintained over 20 years, is worth more than most people earn in a working year.
The pension growth calculator exists to make that number visible — clearly, simply, and without the obfuscation that pension providers and wealth managers have a commercial interest in maintaining.
After the Calculator: What to Do With the Numbers
Running the calculator takes two minutes. What happens next depends on what you find.
If your current trajectory is broadly on track and you are comfortable with your provider’s fees and performance, you have confirmation. That is valuable.
If — as is the case for the majority of people who use the calculator — you discover a significant gap between where you are headed and where you need to be, you have something more valuable: a precise number to act on.
The Great Investments Programme exists for that second group. It provides the quantitative framework, the weekly approved stock list, and the structured mentoring to help analytically capable professionals close that gap — not by taking on more risk, but by investing more systematically. Learn more at alpeshpatel.com/shares.
Frequently Asked Questions: Pension Growth Calculator
What is a realistic pension growth rate for a UK investor?
The average UK managed pension fund has returned 6–7% net of charges over the last decade. A low-cost global equity tracker has returned 9–11% over the same period. A well-constructed, self-directed portfolio using a quantitative stock selection framework can target 11–14% annually over the long run, though past performance is not a guarantee of future results.
How much should I have in my pension at 50?
A common rule of thumb is approximately 10–12 times your annual salary by retirement. At 50, with 15–17 years remaining, you would ideally have 5–7 times your annual salary already accumulated. But the right figure depends entirely on your target retirement income, your planned retirement age, and the growth rate your pension will achieve between now and then — which is exactly what the pension growth calculator at campaignforamillion.com/tools is designed to show you.
How does fee drag affect pension growth?
Annual management charges compound against you every year, regardless of performance. On a £250,000 pot over 20 years, the difference between a 1.65% total annual charge (typical managed pension) and a 0.30% self-directed SIPP is approximately £330,000 in lost retirement wealth — before any performance differential is taken into account.
Can I improve my pension growth rate without taking more risk?
Yes — and this is the core insight behind the Great Investments Programme. Much of the improvement available to self-directed investors comes not from taking on more risk, but from eliminating unnecessary costs and replacing emotionally-driven stock selection with a disciplined, quantitative framework. Switching from a 1.5% managed fund to a 0.30% self-directed platform alone improves your net return by 1.2% annually before any investment decisions are made.
Is the pension growth calculator free?
Yes, completely free. No sign-up required. Visit campaignforamillion.com/tools, enter your current pot size, projected growth rate, and years to retirement, and see your projection in under two minutes.
Run your own numbers now — it takes less than two minutes: Free Pension Growth Calculator at campaignforamillion.com/tools. If you want a personalised review of your pension alongside the numbers, book a free portfolio review here.
Disclaimer: This article is for educational purposes only and does not constitute personal financial guidance or a recommendation to transfer any pension. All investing carries risk. Past performance is not a reliable indicator of future results.
Alpesh Patel OBE