Spending it down without running out.

How much can you safely pull from your savings each year? The famous answer is 4%, but that number comes with conditions, a 30-year horizon, a specific stock-bond mix, and a U.S. market history that may not repeat. The guides below explain where the rule comes from, when it breaks down (especially for early retirees), and how the order of your returns matters as much as the average. To see what rate survives your own numbers, run them through the calculator.

Turning a portfolio into a paycheck

The withdrawal phase reverses everything the saving phase taught you. For decades the goal was to put money in and let it compound. In retirement you take money out while the balance still has to last, and the central question becomes how much you can pull each year without running dry before the end. The answer depends on your time horizon, your asset mix, and, more than most people expect, the order in which your returns arrive.

Where the 4% rule comes from

The most cited starting point is the 4% rule. Withdraw 4% of your portfolio in the first year, adjust that dollar amount for inflation each year after, and a balanced portfolio historically lasted at least thirty years. It traces to financial planner William Bengen's 1994 research and the later Trinity Study, both built on U.S. market history. The rule is a useful baseline, not a law. It assumes a thirty-year retirement, a particular stock and bond split, and a future that resembles the past closely enough. Our guide to safe withdrawal rates covers where the number holds and where it bends.

Why early retirees need a lower rate

Stretch the horizon and the safe rate falls. A retirement that runs forty or fifty years gives a bad market sequence more time to do damage and adds years the portfolio has to survive, so the 4% figure calibrated for thirty years no longer fits. Someone retiring at 45 also faces decades before Social Security starts, which means the portfolio carries the full load for longer. The piece on the 4% rule and early retirement works through the lower rate a long horizon calls for.

Sequence risk is the real threat

The order of returns matters as much as the average. Two retirees can earn the same average return over retirement and end up in completely different places depending on when the losses land. A crash in the first few years, while you are selling assets to live on, permanently shrinks the base that later gains compound from. The same crash fifteen years in does far less harm. That dynamic is why a fixed withdrawal plan that ignores market conditions can fail even when the long-run average looks fine.

Testing a rate against your own plan

A single rate drawn from historical averages cannot tell you how your plan handles bad luck. A Monte Carlo simulation can. It runs your withdrawals against hundreds of randomized return sequences and reports how often the money lasts to the age you set, turning "4% is usually safe" into a probability for your specific numbers. The accounts you draw from matter too, since taxes change how much of each withdrawal you keep.