How Often Should You Rebalance Your 401(k)

Many investors review their 401(k) allocation once or twice a year. Another approach is to rebalance when an asset class moves a predetermined amount—such as 5 percentage points—away from its target.

Neither method is automatically right for everyone.

How often you should rebalance your 401(k) depends on your target allocation, retirement timeline, risk tolerance, available investments, and whether your plan already provides automatic rebalancing.

The objective is not to react to every market movement. It is to prevent market performance from gradually changing the level of risk you originally selected.

What Does Rebalancing a 401(k) Mean?

Rebalancing means adjusting the investments in your 401(k) to restore your intended asset allocation.

According to Investor.gov’s definition of rebalancing, some investments grow faster than others over time. This can cause your holdings to move away from the allocation chosen for your financial goals.

Suppose your target allocation is:

• 70% stock funds
• 25% bond funds
• 5% stable-value or cash-equivalent investments

After a strong year for stocks, your allocation might become:

• 78% stock funds
• 18% bond funds
• 4% stable-value investments

Even though you did not actively change anything, your portfolio now has greater stock exposure—and potentially more volatility—than originally intended.

Rebalancing could involve reducing the stock allocation and increasing the bond and stable-value allocations until the portfolio returns to approximately 70%, 25%, and 5%.

How Often Should You Rebalance Your 401(k)?

For many long-term investors, reviewing a 401(k) every six or 12 months is a practical starting point.

Investor.gov notes that some financial professionals suggest rebalancing at regular intervals, such as every six or 12 months. Others recommend acting when an asset category moves beyond a predetermined percentage. It also explains that rebalancing tends to work best when performed relatively infrequently. Read its asset-allocation guidance.

Your choices can therefore be divided into three approaches:

There is no federal rule requiring individual 401(k) participants to use one of these schedules. Your employer’s plan may also provide different tools, restrictions, or automatic features.

Calendar-Based Rebalancing

Calendar-based rebalancing involves reviewing your 401(k) at predetermined times.

For example, you might check it:

• Every January
• On your birthday
• Twice a year
• During annual benefits enrollment

The advantage is simplicity. You do not need to watch the market throughout the year, and a fixed schedule reduces the temptation to make emotional changes after every rise or decline.

However, reviewing your account does not mean you must change it. If the allocation remains close to your target, you may decide that no rebalancing transaction is necessary.

Threshold-Based Rebalancing

Under a threshold strategy, you act when an investment category moves a specified distance from its target.

A commonly discussed example is a drift of 5 percentage points, although this is not a universal rule or government recommendation.

If your target stock allocation is 70%, a 5-percentage-point band might prompt a review if stocks move below 65% or above 75%.

Notice the difference between percentage points and percentages:

• Moving from 70% to 75% is a change of 5 percentage points.
• It is not simply described as a 5% relative increase.

Your appropriate threshold may depend on:

• Portfolio size
• Number of available funds
• Investment volatility
• Time remaining until retirement
• Personal tolerance for deviation
• Any plan restrictions

A narrow threshold may create unnecessary activity, while an excessively wide threshold could allow your risk level to change substantially.

A Hybrid Approach May Be Most Practical

A hybrid method combines scheduled reviews with a drift threshold.

For example:

1. Review your 401(k) every six months.
2. Compare your current allocation with its target.
3. Rebalance only when a major asset class has moved at least 5 percentage points from its target.
4. Make an earlier review after a significant life or financial change.

This structure keeps you informed without encouraging constant trading.

The 5-point figure is only an example. You can select another rule appropriate for your plan and circumstances or consult a qualified financial professional.

A Practical 401(k) Rebalancing Example

Consider an investor with a $100,000 401(k) and this target:

• U.S. stock fund: 50%
• International stock fund: 20%
• Bond fund: 30%

The target dollar amounts are:

• U.S. stocks: $50,000
• International stocks: $20,000
• Bonds: $30,000

Following market changes, the account becomes:

• U.S. stocks: $59,000
• International stocks: $19,000
• Bonds: $27,000
• Total value: $105,000

The current percentages are approximately:

• U.S. stocks: 56.2%
• International stocks: 18.1%
• Bonds: 25.7%

The U.S. stock position is now more than 6 percentage points above its 50% target, while bonds are more than 4 points below their target.

If the investor’s rule is to act when an asset class drifts by 5 percentage points, this situation could trigger a rebalance.

The investor might:

• Exchange part of the U.S. stock position for bonds;
• Direct more future contributions toward bonds and international stocks; or
• Combine both methods.

The correct response depends on the plan’s investment options, transaction rules, and the investor’s current strategy.

Three Ways to Rebalance Your 401(k)

1. Exchange existing investments

You can sell or exchange part of an overweight fund and direct the proceeds into underweight investments available in your plan.

This can restore the target allocation relatively quickly. Before making the exchange, check whether your plan or selected funds have:

• Trading restrictions
• Redemption policies
• Short-term trading limitations
• Transaction fees
• Restrictions on frequent exchanges

These details should appear in your plan documents or fund disclosures.

2. Redirect new contributions

Instead of exchanging existing holdings, you can send a larger percentage of future payroll contributions to underweight categories.

Investor.gov identifies adjusting ongoing contributions as one potential method of bringing a portfolio back toward its desired allocation.

This approach may take longer, particularly if your account is large compared with each new contribution. However, it can reduce the number of exchanges you make.

Be careful to distinguish between:

• Changing how your existing balance is invested; and
• Changing how your future contributions are invested.

Some 401(k) interfaces provide separate controls for these actions.

3. Use automatic rebalancing

Some workplace retirement plans allow participants to select automatic rebalancing at intervals such as quarterly, semiannually, or annually.

If your plan offers this feature, review:

• How frequently it operates
• Whether it returns the account to your exact targets
• Which investments it includes
• Whether it affects future contribution elections
• Any restrictions or costs

Automatic rebalancing can provide consistency, but you should still review the portfolio periodically to ensure that the underlying target remains appropriate.

Does a Target-Date Fund Rebalance Automatically?

Target-date funds generally handle diversification and rebalancing within the fund.

The U.S. Department of Labor explains that target-date retirement funds automatically rebalance and typically become more conservative as the selected retirement date approaches. This gradual adjustment is often called the fund’s glide path. See the Department of Labor’s target-date fund guidance.

If nearly all your 401(k) is invested in one target-date fund aligned with your retirement timeline, manually combining it with other stock or bond funds may interfere with its intended allocation.

Before adding other investments, examine:

• The target-date fund’s current allocation
• Its glide path
• Underlying funds
• Fees
• Risk level
• Expected allocation at retirement
• Whether it is designed to move “to” or “through” retirement

The date in the fund’s name is only an approximate retirement year. It does not guarantee that the fund is suitable for every investor expecting to retire around that date.

When Should You Review Your 401(k) Earlier?

A regular schedule works for routine maintenance, but certain developments may justify an earlier review.

Your retirement timeline changes

A decision to retire earlier or later may change the level of risk you can comfortably accept.

Your risk tolerance changes

A portfolio should reflect both your willingness and financial ability to withstand losses. If your reaction to market volatility reveals that your allocation is unsuitable, revisit the strategy rather than repeatedly making emotional transactions.

Your employer changes the investment menu

A plan might add, remove, merge, or replace investment options. Review any notices from the plan administrator and determine how the change affects your allocation.

You change jobs

Changing employers can leave you with multiple retirement accounts. Evaluate your combined exposure before making any rollover or allocation decision.

Your financial situation changes significantly

Major events may affect your retirement strategy, including:

• Marriage or divorce
• A substantial income change
• A new dependent
• Disability
• Major unexpected expenses
• Receiving an inheritance
• Paying off significant debt

A life event does not always require rebalancing, but it may justify reviewing your goals, timeline, and risk capacity.

One investment category experiences major movement

A large market move may cause meaningful drift before your normal review date. Check the allocation against your predetermined rule instead of reacting only because the financial news appears alarming.

Should You Rebalance During a Market Decline?

A falling market can make rebalancing emotionally difficult.

A disciplined rebalance may require adding to an investment category that has recently declined and reducing one that has held up better. That can feel uncomfortable, even when it is consistent with the original strategy.

Avoid changing your allocation simply because you are trying to predict what the market will do next.

Before acting, ask:

1. Has my long-term objective changed?
2. Has my time horizon changed?
3. Is my current allocation outside its permitted range?
4. Am I following a written plan or reacting to recent headlines?
5. Can I tolerate the risk associated with my target allocation?
6. Does my employer plan impose any transaction restrictions?

Rebalancing is intended to control portfolio risk—not to identify the market’s next high or low point.

Does Rebalancing a 401(k) Cost Money?

The answer depends on your plan.

Many 401(k) plans permit exchanges between investment options without a separate commission, but this should not be assumed. A plan or fund may impose:

• Administrative expenses
• Investment management fees
• Short-term trading restrictions
• Redemption fees
• Limits on frequent transactions
• Other plan-specific charges

Review the plan’s fee disclosures and each fund’s prospectus before making changes.

Rebalancing within a tax-deferred 401(k) is also different from selling investments in an ordinary taxable brokerage account. Transactions inside the plan generally do not produce an immediate personal capital-gains tax bill in the same way that taxable-account sales can. Taxes generally become relevant when taxable distributions are taken, subject to the account type and applicable rules.

Because individual tax circumstances vary, consult a qualified tax professional when necessary.

How Rebalancing Differs From Changing Your Strategy

Rebalancing restores an existing target. Changing your investment strategy creates a new target.

Suppose your intended allocation is 70% stocks and 30% bonds.

• Returning an 80/20 portfolio to 70/30 is rebalancing.
• Deciding that your new target should be 60/40 is a strategy change.

Do not treat a permanent strategy change as routine rebalancing.

A new target should be based on factors such as:

• Retirement goals
• Time horizon
• Expected withdrawals
• Other retirement income
• Emergency savings
• Risk tolerance
• Overall household investments

Your 401(k) should also be considered alongside IRAs, taxable investments, pensions, and a spouse’s retirement accounts where applicable.

Check for Overlap Before Rebalancing

A portfolio can appear diversified because it contains several funds while still holding many of the same underlying companies.

Before adjusting percentages, review whether you have overlapping ETF or fund holdings that unintentionally increase exposure to particular companies, sectors, or investment styles.

Also consider whether several funds perform essentially the same role. Our guide to deciding how many ETFs may be appropriate explains why owning more funds does not necessarily create better diversification.

Within a 401(k), examine:

• Fund objectives
• Indexes tracked
• Top holdings
• Stock-versus-bond allocation
• Domestic and international exposure
• Large-, mid-, and small-cap exposure
• Expense ratios
• Any holdings inside target-date or balanced funds

Common 401(k) Rebalancing Mistakes

Rebalancing too frequently

Daily or weekly monitoring can encourage unnecessary activity. Minor fluctuations do not always require intervention.

Never rebalancing

Ignoring the portfolio for many years can allow its risk level to change significantly.

Chasing recent performance

Moving money into whichever fund performed best recently is not the same as rebalancing. It may increase exposure after prices have already risen.

Selling after every market decline

Abandoning the target allocation during temporary volatility can convert a long-term strategy into short-term market timing.

Changing only future contributions

Redirecting new contributions might not correct a substantial imbalance in a large existing balance.

Changing only the existing balance

After exchanging current investments, leaving all future contributions directed toward an overweight category can recreate the imbalance.

Mixing a target-date fund with overlapping funds

Adding several stock and bond funds around a target-date fund can unintentionally alter its professionally managed allocation.

Ignoring other retirement accounts

Rebalancing one 401(k) in isolation may not correct the allocation across your entire household portfolio.

A Simple 401(k) Rebalancing Process

Use this process during your scheduled review.

Step 1: Record your target allocation

Write down the intended percentage for each major category.

Step 2: Check the current allocation

Use your plan’s website or statement to determine the current percentages.

Step 3: Calculate the drift

Subtract each target percentage from its current percentage.

For example:

• Target stock allocation: 70%
• Current stock allocation: 76%
• Drift: 6 percentage points above target

Step 4: Apply your written rule

Determine whether the drift is large enough to require action under your selected calendar, threshold, or hybrid policy.

Step 5: Choose a rebalancing method

Consider exchanging existing holdings, redirecting future contributions, or using both.

Step 6: Review fees and restrictions

Check plan documents before confirming any exchange.

Step 7: Document the change

Record:

• Date reviewed
• Previous allocation
• New allocation
• Reason for the change
• Next review date

This helps you follow a consistent process rather than relying on emotion.

401(k) Rebalancing Checklist

During each review, ask:

• Is my target allocation still appropriate?
• How far has each asset class moved from its target?
• Has my retirement timeline changed?
• Has my risk tolerance changed?
• Are my existing and future contributions allocated correctly?
• Does my plan offer automatic rebalancing?
• Am I using a target-date fund?
• Do any funds duplicate the same exposure?
• Have the plan’s investment options or fees changed?
• Am I responding to my written rule or to market headlines?
• Have I reviewed my other retirement accounts?
• When will I conduct the next review?

Frequently Asked Questions

How often should I rebalance my 401(k)?

Many investors review their 401(k) every six or 12 months. Others rebalance when an asset class moves beyond a predetermined threshold. The appropriate schedule depends on your allocation, risk tolerance, retirement timeline, and plan features.

Should I rebalance my 401(k) every quarter?

Quarterly rebalancing may be more frequent than necessary for some long-term investors. If your plan offers it automatically, determine whether the service acts only after meaningful drift or resets the allocation every quarter regardless of size.

Is annual 401(k) rebalancing enough?

An annual review may be sufficient when your allocation remains relatively stable and your financial circumstances have not changed. A significant allocation drift or life event may justify an earlier review.

What percentage should trigger rebalancing?

There is no mandatory threshold. A 5-percentage-point drift is a commonly discussed example, but an appropriate limit depends on the asset class, portfolio design, time horizon, and investor.

Should I rebalance during a recession?

Rebalance according to your predetermined allocation policy rather than trying to label or predict economic cycles. Review whether your goals, timeline, or ability to accept risk have genuinely changed.

Does rebalancing reduce returns?

Rebalancing is primarily a risk-control process, not a guarantee of higher returns. It may cause you to reduce an outperforming asset and add to an underperforming one. Its purpose is to keep the portfolio near its intended risk profile.

Do target-date funds need to be rebalanced?

The fund manager generally handles rebalancing inside a target-date fund. However, combining it with other investments may change your overall allocation, so the complete account should still be reviewed.

Can I rebalance using new contributions?

Yes. Directing new contributions toward underweight categories can gradually restore your allocation without immediately exchanging existing investments. The method may work slowly when the account balance is large relative to new contributions.

Final Thoughts

For many investors, checking a 401(k) once or twice per year and acting only after meaningful allocation drift provides a reasonable framework.

The best schedule is one you can follow consistently without reacting to short-term market noise.

Start with a clear target allocation, select a calendar or threshold rule, verify your plan’s features and restrictions, and document each review. If your retirement timeline, financial position, or tolerance for risk changes, reconsider the target itself before making routine adjustments.

Rebalancing cannot eliminate investment losses or guarantee retirement success. It can, however, help prevent market performance from quietly turning your 401(k) into a portfolio with more—or less—risk than you intended.

This article is for educational purposes only and does not constitute individualized investment, tax, legal, or retirement-planning advice. Investing involves risk, including the possible loss of principal. Review your plan documents and consider consulting qualified professionals before making significant financial decisions.