The Right Way to Withdraw From Your 401(k) in Retirement

Saving for retirement is a decades-long discipline. Withdrawing from those savings wisely is an entirely different skill — one that most people are never taught. Withdraw too aggressively and you risk running out of money in your 80s. Withdraw too conservatively and you pay unnecessary taxes while leaving money that could fund a better quality of life sitting idle.

Here is a practical guide to making your 401(k) distributions work as efficiently as possible throughout retirement.

The 4% Rule: A Starting Point, Not a Guarantee

The 4% rule originated from the Trinity Study, which found that retirees who withdrew 4% of their portfolio in year one — and adjusted that amount for inflation each year — had historically avoided running out of money over a 30-year retirement. It became the most widely cited retirement withdrawal guideline in financial planning.

In practice, this means: if you have $500,000 saved, you could withdraw $20,000 in year one ($1,667/month) and adjust for inflation each subsequent year. Over 30 years, historical data suggests this withdrawal rate had a high success rate in most market environments.

The Order of Withdrawals: Taxable First, Tax-Deferred Second, Roth Last

Where you pull money from matters as much as how much you pull. The conventional wisdom is to withdraw from accounts in this order:

1. Taxable accounts first (brokerage accounts, savings) — These accounts have already been taxed. Spending them first lets your tax-advantaged accounts continue growing. Long-term capital gains in taxable accounts are also taxed at preferential rates.
2. Tax-deferred accounts second (traditional 401(k), traditional IRA) — Withdrawals are taxed as ordinary income. Delaying these withdrawals gives you more flexibility and may allow for strategic Roth conversions in lower-income years.
3. Roth accounts last (Roth 401(k), Roth IRA) — These accounts grow and can be withdrawn tax-free. Preserving them as long as possible maximizes their value and provides a tax-free reserve for large unexpected expenses.

This order is a general framework, not an absolute rule. Your specific tax situation may make a different sequence optimal — especially if you are trying to manage your taxable income to stay below IRMAA Medicare surcharge thresholds or optimize Social Security taxation.

Sequence of Returns Risk: The Danger Nobody Warns You About

One of the most underappreciated risks in retirement is sequence of returns risk — the danger that poor market performance in the early years of retirement can permanently damage your portfolio, even if average long-term returns are fine.

Here is why: If the market drops 30% in year one of retirement and you are withdrawing 4% of your portfolio, you are selling more shares at depressed prices to fund your expenses. When the market recovers, you have fewer shares to benefit from the rebound. Two retirees with identical average returns over 20 years can have dramatically different outcomes depending on whether good returns came early or late.

How to Protect Against It

• Cash buffer: Keep 1–2 years of living expenses in cash or short-term bonds so you never have to sell equities during a market downturn
• Flexible withdrawal rate: Be willing to temporarily reduce withdrawals by 10–15% during significant market downturns
• Bucket strategy: Divide your portfolio into short-term (cash), medium-term (bonds), and long-term (equities) buckets based on when you'll need the money

Required Minimum Distributions (RMDs)

The IRS requires you to begin taking withdrawals from traditional 401(k) accounts and IRAs at age 73 (as of 2023). These Required Minimum Distributions are calculated based on your account balance and IRS life expectancy tables. Failing to take RMDs results in a penalty of 25% of the amount you should have withdrawn.

RMDs can push you into a higher tax bracket if you haven't planned for them, especially if you have deferred large balances. This is one of the primary reasons financial planners recommend doing partial Roth conversions in the years between retirement and age 73 — to reduce the size of your taxable accounts before RMDs begin.

Coordinating Withdrawals With Social Security

The years between retirement and age 70 (or whenever you claim Social Security) are often the best window for managing your tax situation. In those years, your income may be lower than it will be once Social Security and RMDs kick in — creating an opportunity to withdraw from tax-deferred accounts at lower tax rates, or to execute Roth conversions.

Building a withdrawal strategy that coordinates 401(k) distributions, Social Security timing, and Roth conversions can meaningfully reduce your lifetime tax bill. This is where working with a fee-only financial planner for at least one planning session can pay for itself many times over.

How Withdrawals Affect Your Retirement Comfort Score

In the TYMS calculator, your 401(k) or IRA withdrawals count as income — specifically as "retirement account withdrawals." The amount you enter directly affects your Comfort Score. Many retirees enter their expected annual withdrawal divided by 12, which is the right approach for planning purposes.

If your score is lower than you'd like, consider whether there are income optimization strategies available — like delaying Social Security to reduce the withdrawal burden, or tapping taxable accounts first to keep your overall tax rate lower.