Use this calculator to estimate portfolio drawdown over time while taking annual withdrawals. It models growth, inflation-adjusted spending, and tracks the maximum peak-to-trough decline.
What is investment drawdown?
Investment drawdown is the decline from a portfolio’s highest value (its peak) to a lower point (its trough). If your investments rise to $800,000 and later fall to $600,000, your drawdown is 25%. Drawdown matters because it helps you measure downside risk, not just average returns.
Two portfolios can both average 7% annually, yet one can feel far more stressful if it suffers deeper and longer declines. Drawdown gives you a practical way to evaluate that real-world experience.
How this calculator works
This investment drawdown calculator runs a year-by-year projection using your assumptions:
- Your starting portfolio value
- Your expected annual return
- Your annual withdrawal amount
- Inflation adjustments to withdrawals over time
- A one-time market shock (optional)
- Your projection period in years
As the model runs, it tracks the highest balance reached and compares each new balance against that high. The largest drop observed is shown as your maximum drawdown.
Why drawdown is critical for retirement planning
1) Sequence of returns risk
Poor returns early in retirement can damage sustainability more than poor returns later. When you withdraw during a slump, you may sell more shares at low prices, reducing your ability to recover.
2) Withdrawal pressure
Even with decent long-term returns, a high withdrawal rate can deepen drawdowns. That’s why many investors monitor both return assumptions and spending assumptions together.
3) Emotional decision-making
Big portfolio declines can trigger panic selling. Knowing your potential drawdown ahead of time helps build a plan you can stick with through volatility.
Interpreting your results
- Maximum Drawdown: Largest observed percentage drop from a prior peak.
- Worst Year: The year in which the maximum drawdown occurred.
- Required Recovery Gain: The gain needed from the trough to get back to the previous peak.
- Portfolio Depletion: Indicates whether the balance hits zero before the selected horizon.
Remember: a 50% loss needs a 100% gain to recover. Drawdown recovery is nonlinear, which is exactly why risk control matters.
Ways to reduce drawdown risk
Diversify beyond one asset class
A mix of stocks, bonds, cash, and potentially alternatives can reduce deep portfolio swings compared with a concentrated allocation.
Use a flexible withdrawal strategy
Instead of withdrawing a fixed inflation-adjusted amount every year, some retirees lower spending after severe market declines. This can materially improve portfolio longevity.
Keep a cash buffer
Holding 1–3 years of essential spending in cash or short-term bonds may help you avoid selling equities at depressed prices.
Example scenario
Suppose you start with $500,000, withdraw $25,000 per year, and expect 6% annual returns with 2.5% inflation adjustments. If an immediate 15% market drop occurs, the model may show a materially larger maximum drawdown and potentially earlier depletion, depending on the assumptions.
Try running multiple scenarios: optimistic, base case, and stress case. Planning around the stress case can improve resilience.
Important limitations
- This is a deterministic model; it uses a constant return assumption rather than random market paths.
- It does not include taxes, fees, changing asset allocation, or required minimum distributions.
- Real-world outcomes can vary significantly.
Use this calculator as a planning aid, not as investment advice. For major decisions, consult a qualified financial professional.