Where the 4% rule came from
Research on historical US stock and bond returns found that a retiree withdrawing 4% of their initial portfolio in year one, then adjusting that amount for inflation annually, would have survived every historical 30-year window without depleting the portfolio.
The important caveats: it was based on one country's unusually strong century, assumed a specific stock-bond mix, and targeted a 30-year horizon. Longer retirements, different markets and higher inflation all argue for a lower rate.
Choosing your own rate
Retiring early with a 40-year horizon suggests 3 to 3.5%. A standard retirement at 60 to 65 supports something near 4%. Retiring later with a shorter horizon can justify 5% or more.
Flexibility is worth more than precision. Retirees willing to trim spending by 10% during bad market years can sustain meaningfully higher rates than rigid plans, because the damage from selling into a downturn is what breaks portfolios.
Frequently asked questions
Is the 4% rule still valid?
It remains a reasonable anchor for a 30-year retirement in developed markets. Many planners now suggest 3 to 3.5% for early retirees or where future returns are expected to be lower.
Should the withdrawal rise with inflation?
In the original rule, yes: the initial amount is inflation-adjusted each year. This calculator models a flat withdrawal, so treat the projection as optimistic if you plan inflation increases.
What is sequence-of-returns risk?
The danger of poor returns in the first years of retirement. Selling units at depressed prices permanently shrinks the base, so identical average returns in a different order can produce very different outcomes.
How can I protect against a bad start?
Hold two to three years of withdrawals in cash or short-term debt, and be willing to reduce discretionary spending during severe downturns.
Does the withdrawal rate depend on my asset allocation?
Considerably. Portfolios too conservative fail to outpace inflation; portfolios too aggressive suffer badly from early crashes. A meaningful equity allocation is generally needed for a 30-year horizon.
What if my portfolio grows faster than expected?
You can increase withdrawals, but do so gradually. Ratcheting up spending after one strong year is the mistake that turns a safe plan into a fragile one.