401(k) Blackout Periods: All You Need to Know

A 401(k) blackout period is a hiatus during which plan participants may not make certain changes to their 401(k) accounts. Employers who offer 401(k) plans typically impose blackouts when they need to update or alter aspects of their plans. A blackout period may last anywhere from a few days to several weeks.

A blackout period doesn’t mean that the account is frozen. Employees in a payroll deduction plan can typically continue making scheduled contributions to their 401(k) accounts during a blackout period, and assets held in 401(k) accounts remain invested in the market.

What Is a 401(k) Blackout Period?

As noted above, a 401(k) blackout period is a temporary suspension of employees’ ability to access their 401(k) accounts for actions such as 401(k) withdrawals or portfolio adjustments.

Companies use blackout periods to update or change their 401(k) retirement savings plans. Unfortunately, these blackout periods may sometimes be inconvenient for employees who are saving for retirement.

When Is a 401(k) Blackout Period Necessary?

There are several situations that might call for an employer to implement a 401(k) blackout period. Some common reasons include:

•   Changes to the plan. Employers may need to implement a blackout period to allow for changes to their 401(k) plans, such as adding or eliminating investment alternatives or modifying the terms of the plan.

•   New management. If an employer’s 401(k) plan is managed by a third party, the employer might decide to change sponsors or financial managers. A blackout period would give the employer time to transfer the assets and records.

•   Mergers and acquisitions. Acquisition of a new firm or a merger with another company could require a blackout period while the two companies integrate their 401(k) plans.

•   Issues with compliance. If an employer finds that the terms of their 401(k) plan violate federal laws, they may need to impose a blackout period while they conduct audits and bring the plan into compliance.

How Long Can a 401(k) Blackout Period Last?

A 401(k) blackout period can last for a few days or for a few weeks, but the typical duration is 10 days. The length often depends on the reason for the blackout and how much time it will take to implement the scheduled fixes. There is no legal maximum blackout period for 401(k) plans.

Will I Be Given a 401(k) Blackout Notice?

Employers are required to notify employees in advance of a blackout period. For blackout periods expected to last more than three days, employers must give at least 30 days’ (and not more than 60 days’) notice, according to the federal Employee Benefits Security Administration (EBSA). If the period’s beginning or ending date changes, employers are expected to provide an updated blackout notice as soon as reasonably possible.

Employers must provide this notice in writing, either by mail or email. The notice should include the reason for the blackout.

What Should I Do Before the Blackout Starts?

If a 401(k) blackout period is approaching, there are some steps you can take to prepare. Here are a few things to consider doing before the blackout starts:

•   Review the account. Once you get your blackout notice, take some time to review your 401(k) plan, including your current contributions, investment options, and overall balance. This overview can help you zero in on anything that may need correction before the blackout begins.

•   Make any appropriate changes. If you need to fine-tune how you’re investing in your 401(k), such as by adjusting contribution amounts or reallocating investments, try to do so before the blackout period. This will help ensure that your changes take effect as soon as possible.

•   Communicate with your employer. For questions about the blackout period or requests for additional information, your employer is likely to be the best resource. They should be able to provide more details and address account-related concerns.

Starting Out With a New 401(k)

People starting a new job that offers a 401(k) plan have some decisions to make. Plan details to consider before committing to a new 401(k) account may include:

•   Contribution limits. The Internal Revenue Service (IRS) sets limits on annual 401(k) contributions. Contribution limits for a 401(k) are $24,500 in 2026 for those under age 50. Those aged 50 and over can make an additional catch-up contribution of $8,000 per year to a 401(k) in 2026. And those aged 60 to 63 may contribute up to an additional $11,250 instead of $8,000 in 2026, thanks to SECURE 2.0. If you want to max out your 401(k), knowing these limits can help you schedule your contributions appropriately.

Under a new law regarding catch-up contributions that went into effect on January 1, 2026 (as part of SECURE 2.0), individuals aged 50 and older who earned more than $150,000 in FICA wages in 2025 are required to put their 401(k) catch-up contributions into a Roth 401(k) account. Because of the way Roth accounts work, these individuals will pay taxes on their catch-up contributions upfront, but can make eligible withdrawals tax-free in retirement. (The plan must offer a Roth option; if it doesn’t, individuals who earned more than $150,000 in FICA wages cannot make catch-up contributions.)

•   Investment options. Most 401(k) plans offer a range of investment vehicles, including mutual funds, exchange-traded funds (ETFs), and individual stocks. Researching various asset types will help you see which ones align with your investment goals and risk tolerance.

•   Fees. Some 401(k) plans charge fees for services such as plan administration or investment management. Understanding how the plan’s fees may impact your overall returns is crucial.

•   Employer match. Many employers offer a matching contribution to employee 401(k) accounts. This means that the employer will kick in an additional percentage to augment an employee’s contributions. An employer match is a way of boosting your savings as you are preparing for retirement, which may lead to bigger investment gains over time.

The Takeaway

Employees with 401(k) retirement accounts occasionally experience blackout periods. People may not access or alter their accounts during these breaks, which occur when employers and 401(k) plan sponsors need time to update or retool their retirement benefit plan. Blackout periods typically last for a few days or weeks. By law, participants must be notified at least 30 days ahead of a scheduled blackout period. This enables them to make any desired 401(k) investment changes beforehand.

One convenient way of investing for retirement is through an individual retirement account. Investors can open an online IRA account with an online brokerage and start saving right away. Not only is it possible to have both a 401(k) and an IRA at the same time, but having more than one retirement plan may help investors save money for retirement.

FAQ

What is a retirement-fund blackout period?

A 401(k) blackout period is a multi-day pause during which the employer or the plan administrator typically update or maintain the plan. During this time, employees can’t alter their 401(k) retirement accounts. Making withdrawals or changing asset allocations may be prohibited. Though a blackout period is temporary, it can last several weeks or more.

Can you contribute to your 401(k) during the blackout period?

This depends on the specific terms of the employer’s 401(k) plan and the blackout period. Many plans may allow employees to keep setting aside money in their 401(k) accounts during a blackout, but some may not. Your employer or plan administrator will have information on your plan’s rules for contributions.

How do I get my 401(k) out of the blackout period?

In most cases, there is nothing you can do to avoid or shorten your 401(k) blackout period. A blackout period generally comes to an end once the employer or plan administrator has completed the necessary plan updates. If you have additional questions about the duration of the blackout period or how to access your account again, your employer should be able to answer them.

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