The 401(k) Rule of 55: How the Age 55 Rule Works for Families Leaving Work Early

By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.

The 401(k) rule of 55 lets you take money out of your current employer’s 401(k) or 403(b) without the 10% federal early-withdrawal tax if you leave that job in or after the calendar year you turn 55. You still owe ordinary income tax on pre-tax money. The exception covers only the plan of the employer you leave, not IRAs and not plans from earlier jobs that you left before the year you turned 55.

For a two-income family in Seattle or the Bay Area, it matters because it can turn a large 401(k) into a bridge between leaving a demanding job at 55 and age 59½, when the 10% tax stops applying to every retirement account. Getting it wrong usually costs 10% of every dollar withdrawn, and in California another 2.5% on top.

How the age 55 rule works, step by step

The IRS lists this as an exception to the 10% additional tax for distributions from a qualified plan made after “the employee separates from service during or after the year the employee reaches age 55” (IRS, exceptions to tax on early distributions). Four details decide whether it works for you:

• The calendar year counts, not your birthday. If you turn 55 in November 2027, you can resign in February 2027 and still qualify. Leave in December 2026 and you do not.
• Only the plan of the employer you just left. A 401(k) from a job you left at 48 does not qualify. Many plans accept roll-ins, so money moved into your current plan before you leave is generally treated as part of that plan. Confirm this with the plan administrator in writing.
• IRAs are excluded. Roll the 401(k) into an IRA after you leave and the exception is gone for that money until 59½.
• The plan decides how you can withdraw. The tax law permits the exception, but some plans allow only a full lump sum, or a limited number of partial withdrawals a year. Read the distribution section of the summary plan description before you set a leaving date.

Qualified public safety employees (for example police officers and firefighters in governmental plans, and private-sector firefighters) use age 50, or 25 years of service under the plan if earlier (Form 5329 instructions). Distributions from a governmental 457(b) are generally not subject to the 10% tax at all, except for amounts rolled in from other plan types or IRAs.

What else changes at 50, 55, 59½ and 60

People searching “benefits when you turn 55” are often mixing up several age rules. Here is how they line up for 2026:

Sources: IRS Notice 2025-67, IRS Publication 969, IRS RMD FAQs.

Worked example: a Seattle family leaving one job at 55

Assumptions (illustrative, simplified): Priya is an Amazon director who turns 55 in November 2027. Her spouse, a hospital physician, keeps working on a $300,000 W-2 salary. Their children are 7 and 10. Priya’s 401(k) holds $1.6 million, including $300,000 she rolled in from a previous employer’s plan while still employed. They plan to draw $150,000 a year from the 401(k) from age 55 until 59½, roughly four and a half years and about $675,000 in total. We use 2026 federal figures as a stand-in for later years.

1. Timing the exit. Priya resigns in March 2027 and waits until January 2028 to start withdrawals, so the first draw is not stacked on top of her partial-year salary and a final RSU vest.
2. Federal tax in a full withdrawal year. $300,000 salary plus $150,000 withdrawal is $450,000. Less the $32,200 standard deduction for married filing jointly, taxable income is $417,800. The withdrawal fills income from $267,800 to $417,800: $135,750 in the 24% bracket (top at $403,550) is $32,580, and $14,250 at 32% is $4,560. Federal tax on the withdrawal is about $37,140.
3. The 10% the rule avoids. Without the exception, add $15,000 a year. Over four and a half years that is $67,500, roughly what they would pay if Priya rolled everything to an IRA on her last day and drew from it instead.
4. Withholding. The plan must generally withhold 20% on a payment that could have been rolled over, so $30,000 of each $150,000 (IRS Topic 413). That is about $7,140 short of the federal tax on the withdrawal. Priya can ask for more withholding on Form W-4R or make estimated payments.
5. Washington. Washington has no individual income tax in 2026, and retirement accounts are exempt from its capital gains tax (WA DOR). A new 9.9% income tax on AGI over $1,000,000 starts January 1, 2028 (WA DOR); at $450,000 of income this family would be below it, though DOR guidance is still pending.

The same family in California. California charges its own 2.5% additional tax on early distributions and follows the same age-55 exception (FTB 3805P instructions, 2025, the latest published). Getting the rule right avoids $18,750 a year of early-withdrawal tax ($15,000 federal plus $3,750 state). The withdrawal is still taxed as ordinary income: at this income it falls in the 9.3% California bracket (2025 schedule, $145,448 to $742,958 for joint filers), about $13,950 a year. The 1.3% SDI does not apply, because a plan distribution is not wages.

The decision to make in your late 40s, not at 55

For most families we meet, the rule of 55 is not a reason to retire. It is a question about which bucket pays for ages 55 to 59½. The main options:

• Current-employer 401(k) under the rule of 55. Ordinary income tax, no 10%. Works best if the plan allows flexible partial withdrawals and you consolidate old plans into it first.
• Taxable brokerage account. Only the gain is taxed. In Washington, long-term gains above the annual deduction ($278,000 for 2025) face the 7% state tax; in California, gains are taxed as ordinary income. For some families this is the cheaper bridge, which is one reason a brokerage account alongside a mega backdoor Roth can make sense in your 40s.
• Roth 401(k) money. The rule of 55 removes the 10% on Roth 401(k) earnings, but earnings are still taxable unless the distribution is qualified (five-year period plus 59½). A nonqualified withdrawal is split pro rata: the share that is your contributions comes out tax-free, the share that is earnings is taxed (IRS designated Roth FAQs). You cannot take contributions out first, as you can with a Roth IRA.
• Substantially equal periodic payments under 72(t). Available from IRAs at any age, but you commit to a fixed schedule for at least five years or until 59½, whichever is later.

If the leaving spouse is the one with the larger or more flexible 401(k), keeping that plan intact at exit usually matters more than any fund choice. Our retirement and employee benefits and tax management work starts with the plan document for exactly this reason.

Common mistakes with the rule of 55

• Leaving in December of the year you turn 54 instead of January of the next year.
• Rolling the 401(k) to an IRA at exit because a broker offered to “simplify” things.
• Assuming old 401(k)s qualify, then finding out too late that they had to be rolled in before separation.
• Starting withdrawals in the exit year, on top of salary, a bonus and a final RSU vest, which can push the draw into the 35% or 37% federal bracket.
• Relying on 20% withholding when the real federal rate on the withdrawal is often 24% to 37%.
• Returning to a new employer and assuming the old plan’s exception disappears. It does not, as covered in using the rule of 55 while still working.

What to write down for your kids

A 10-year-old will notice when one parent stops working at 55. What they will not see is the reasoning: why you picked that year, why you drew from the 401(k) and not the brokerage account, and what you gave up. A one-page Decision Memo in your FamilyKnowledge® Library, written the year you decide, captures that. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.” That thinking is part of family governance.

Rule of 55 questions we hear often

Does the rule of 55 apply to an IRA?

No. The separation-from-service exception applies to qualified employer plans such as 401(k) and 403(b) plans. If you roll the money into an IRA, the 10% federal additional tax generally applies to withdrawals before 59½ unless another exception fits, such as a 72(t) payment schedule. Keep the money in the plan until your bridge years are over.

Does it work for a 403(b)?

Yes, 403(b) plans are covered by the same exception, and the same limits apply: it is the plan of the employer you leave, in or after the year you turn 55. Physicians and researchers at nonprofit hospitals and universities often have both a 403(b) and a 457(b), which follow different rules. See our note on the 403(b) rule of 55.

Is it the year I turn 55 or my 55th birthday?

The year. You qualify if you separate from service at any point during the calendar year in which you reach 55, even before your birthday. Separating the year before does not qualify, even by a few weeks, and later withdrawals from that plan are subject to the 10% until 59½. For more detail, see our guide to 401(k) withdrawals at 55.

Next step

If either of you might leave full-time work between 55 and 59½, pull your plan’s summary plan description this month and check two things: whether it accepts roll-ins, and whether it allows partial withdrawals after separation. If you want a second view on the numbers, the Tax & Wealth Assessment walks through your bridge years with your actual plans. This is general education, and the right move depends on your family’s full picture.

Written by

Kevin Luu

Co-Founder and Chief Learning Officer, Bright Advisers

Kevin has advised high-income W-2 tech and biotech families since 2015, and leads the education-first Age Five Family Office from Brea, California.

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