Money guide · Retirement accounts and planning
Retirement withdrawals and inflation: test your plan
Understand withdrawal-rate arithmetic, rising spending needs, sequence risk, and why one rate cannot guarantee retirement income.
How it works
Different strategies withdraw a fixed initial amount adjusted for inflation, a percentage of the current balance, or an amount that changes with portfolio conditions. These create different spending patterns. A fixed percentage avoids an identical dollar commitment each year, but spending can fall after market losses. No simple rule captures every retirement length or asset mix.
A worked example
With a $500,000 starting portfolio, a hypothetical 4% initial withdrawal is $20,000. Increasing that amount by 3% inflation makes the second-year withdrawal $20,600. If the balance before that withdrawal has fallen to $400,000, $20,600 is 5.15% of the current balance. This arithmetic shows how the burden can change; it does not establish a safe rate.
What to compare
Test weak early returns, sustained inflation, a long retirement, and large health or repair costs. Separate essential spending from spending you could reduce. Model taxes and other income alongside withdrawals, using consistent dollars. A historical backtest can inform scenarios but does not guarantee future conditions.
A common mistake to avoid
Do not multiply a portfolio by a popular percentage and call the result assured lifetime income. Selling investments during a downturn can interact with withdrawals differently from a smooth average-return model. Decisions about a specific retirement portfolio or distribution need a fuller analysis than a general educational example.
Does a 4% withdrawal guarantee I will not run out?
No. It is a commonly discussed planning scenario, not a guarantee. Results depend on duration, allocation, returns, inflation, fees, taxes, and spending flexibility.
Sources and further reading
Connect this to inflation
Inflation changes the spending power of money over time. Read the related inflation explainer, or adjust a retirement goal for inflation using your own assumptions.