Calculate your pension drawdown income
Estimate how much monthly income your pension pot could support, and check whether your target withdrawal is likely to last to your chosen age.
How this pension income drawdown calculator works
This calculator models flexi-access pension drawdown in a simple, practical way. You enter your pension pot, expected growth, fees, inflation, and how long your income needs to last. The tool then estimates:
- your tax-free lump sum (if taken at the start),
- the remaining invested drawdown fund,
- the maximum sustainable first-year income, and
- whether your target monthly income appears sustainable to your selected end age.
It also creates a year-by-year projection so you can see how withdrawals, growth, and inflation interact over time.
Key assumptions used in the projection
1) Growth and fees
The calculation assumes one average annual investment return and one average annual fee level for the entire plan. Real life is bumpier, with positive and negative years.
2) Inflation-linked income
Your withdrawal is assumed to rise with inflation each year. This helps preserve spending power but puts more pressure on the fund over long retirements.
3) Sustainable income estimate
The “max sustainable income” is the first-year annual withdrawal that would be expected to run the invested pot down around your chosen end age under these assumptions.
Inputs explained
Pension pot
Your total defined contribution pension value available for drawdown.
Tax-free cash percentage
In many UK cases, you can take up to 25% tax-free. If taken at the beginning, that amount is removed from the invested drawdown pot.
Drawdown start and end age
This defines your retirement income horizon. A longer timeframe generally means a lower safe starting income.
Return, charges, and inflation
These three assumptions drive the result more than almost anything else. Try multiple scenarios (optimistic, middle, and cautious) before making decisions.
Ways to improve drawdown sustainability
- Lower withdrawals in early retirement.
- Delay drawdown start if possible.
- Reduce fees where practical.
- Keep a cash buffer to avoid selling assets after market drops.
- Review annually and adapt to market conditions.
Common mistakes to avoid
- Assuming returns will be steady every year.
- Ignoring inflation over 25 to 35 years.
- Withdrawing too much in the first decade of retirement.
- Forgetting tax impact and income thresholds.
- Never revisiting your plan after major life or market changes.
Final thoughts
A pension drawdown strategy is not “set and forget.” Use this calculator to build intuition, stress-test your income plan, and decide what feels robust. For personalised guidance on tax, sequence risk, estate planning, and product selection, consider speaking with a regulated financial adviser.