Investment withdrawal runway calculator UK
Model how long a portfolio lasts with fixed monthly withdrawals. Check the formula, worked example and limits before using your own figures.
Enter your figures
Months until modelled depletion
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No market sequence risk, inflation, tax or fees. Not a sustainable-withdrawal recommendation; a constant return hides the effect of actual volatile returns.
How the investment withdrawal runway calculator uk works
Grow each month by the monthly equivalent rate, then subtract the withdrawal until funds run out.
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: investment withdrawal runway
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Starting portfolio (£)
- 100,000
- Monthly end-of-month withdrawal (£)
- 1,000
- Constant annual effective return (%)
- 3
Months until modelled depletion: 115 months
Grow each month by the monthly equivalent rate, then subtract the withdrawal until funds run out.
Investment withdrawal runway: questions answered
What does the investment withdrawal runway calculation include?
Grow each month by the monthly equivalent rate, then subtract the withdrawal until funds run out. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No market sequence risk, inflation, tax or fees. Not a sustainable-withdrawal recommendation; a constant return hides the effect of actual volatile returns.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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