When to Roll Over Your 401(k): Timing Guide for 2026

Q: Can you roll over a 401(k) at any age?

Yes, with two main caveats. First, if you are between 55 and 59½ and separated from the employer that holds the 401(k), rolling to an IRA permanently forfeits the Rule of 55 penalty-free access. Second, once you reach RMD age (73 for most current retirees), you must take your required minimum distribution for the year before rolling the remaining balance — you cannot include an RMD in a rollover.

Q: What happens if you don't roll over your 401(k)?

If you leave a job and do nothing, your balance stays in the old plan. Most plans allow this indefinitely — but if your balance is under $7,000, the plan may auto-cash out or auto-roll to an IRA after a waiting period under SECURE 2.0 § 304. Larger balances stay until you act or until the plan winds down (for example, if your former employer terminates the plan). RMDs apply at age 73 regardless of whether you've rolled over.

Rolling over a 401(k) to an IRA seems like a mechanical transaction — but when you do it changes your tax outcome, your access to the money before 59½, and your Medicare premiums years from now. Most people roll over too early, too late, or without checking the age-specific traps that are easy to miss once.

This guide covers the five categories of timing factors: age triggers, income triggers, employment event triggers, account-specific triggers, and what doesn't matter (including market timing, which is irrelevant for most rollovers).

Quick reference — timing matters most when:

You are between ages 55 and 59½ and might need income before 59½ (Rule of 55 trap)
You are retiring and have a window to convert pre-tax balances at low rates before Social Security and RMDs start
You have an outstanding 401(k) loan — a tax deadline applies after separation
Your old plan has a stable value fund with a 90-day equity wash restriction
You are approaching age 73 — RMDs must start regardless of whether you roll over

1. Age-based timing triggers

Age 55–59½: do not roll before you know your bridge income needs

Under IRC § 72(t)(2)(A)(v), if you separate from service at or after the year you turn 55 — whether you quit, retire, or are laid off — you can take penalty-free distributions from that employer's 401(k) before age 59½.¹ This is the Rule of 55, and it is plan-specific. The moment you roll that 401(k) to an IRA, the exception is gone permanently.

For a 56-year-old who leaves their job with $900,000 in their 401(k) and rolls everything to an IRA, the cost of that mistake is losing 4 years of penalty-free access. If they need $80,000/year in bridge income before age 60, they've created a $32,000 tax bill (10% penalty on $320,000 in distributions) that didn't have to exist.

Timing guideline: If you are between 55 and 59½ and may need pre-retirement income, keep at least the portion you'll need for bridge income in the 401(k). A partial rollover — rolling only the portion you won't need before 59½ — preserves the Rule of 55 on what remains in the plan.

Qualified public safety employees (police, firefighters, EMTs employed by a government) qualify at age 50, not 55.¹

Age 59½: the flexibility point

At 59½, the 10% early-distribution penalty disappears entirely. This is the clearest "clean" rollover window: you can roll without worrying about losing penalty-free access, and you can start Roth conversions without incurring penalties on future distributions. If you've been holding off rolling an old 401(k) because of the Rule of 55 concern, 59½ is the natural point to reassess.

Ages 60–72: the Roth conversion window

The period between your last paycheck and when Social Security and required minimum distributions begin is typically the lowest-income window of your financial life. It is also the best window to convert pre-tax 401(k) or IRA balances to Roth.

After a rollover, pre-tax IRA balances converted to Roth are ordinary income. A 62-year-old with $1.4 million in a rolled IRA and no other income can convert $89,075 per year — the top of the 22% bracket for a single filer — and pay a lower effective rate on that conversion than they likely paid during their working years or will pay in their 70s and 80s when RMDs arrive.

Rolling the 401(k) to an IRA as early as comfortable in retirement — rather than waiting until 72 — gives you more conversion years before RMDs reduce your flexibility.

Age 73: RMD start — roll before your first RMD, not after

Under SECURE 2.0 § 107, required minimum distributions start at age 73 for anyone born between 1951 and 1959.² (For those born in 1960 or later, the RMD start age increases to 75, effective in 2033.)

Two timing rules apply at this stage:

You cannot include an RMD in a rollover. The first distribution you take in your RMD year must be the RMD itself — it is not eligible for rollover. If you want to roll the remaining balance that year, take the RMD first, then initiate the direct rollover for the rest.
The still-working exception. If you are still employed at the company that sponsors the 401(k) and you own less than 5% of that company, you are not required to take RMDs from that plan until you retire. This exception does not apply to IRAs — if you have a prior rollover IRA, you must take RMDs from it at age 73. Some people use a reverse rollover (moving IRA assets back into their current employer's 401(k)) to consolidate and delay RMDs under this exception.³

Age	Key rollover timing consideration	What to check
55–59½	Rule of 55 — rolling forfeits it permanently	Will you need income before 59½?
59½	Penalty-free access unlocks, cleaner rollover	Good time to reassess old plan
60–72	Best Roth conversion window (low income)	Roll and convert in low-income years
73+	RMD must precede rollover in year of distribution	Take RMD first, then roll remainder

2. Income-based timing triggers

The income-gap year: when partial-year income creates Roth conversion room

The year you leave a job is often your best Roth conversion opportunity. If you retire in May, your earned income for the year might be $65,000 — well below your typical $200,000+ working-year income. Adding a $50,000 Roth conversion keeps you in a lower bracket than a working year would allow. The same opportunity exists after a layoff: reduced income in the severance or job-search year creates conversion room that disappears when you start your next position.

Timing the rollover to coincide with this low-income window — rather than delaying the rollover and then doing the Roth conversion later — captures the tax savings before the window closes.

Before Social Security: reduce RMD compression

Social Security income adds to your taxable income in retirement, making the marginal rate on Roth conversions higher after you start collecting. A common strategy is to roll the 401(k) and begin Roth conversions in the gap between retirement and age 70 (the latest age for maximized Social Security benefits), converting as much as possible while Social Security income isn't yet stacking on top of the conversion.

If you start Social Security at 62, that window is shorter. Modeling your specific income stack — Social Security + pension + investment income + conversion income — before picking your start age is part of why rollover timing and Social Security timing interact.

IRMAA two-year lookback: the Medicare trap

Medicare IRMAA (Income-Related Monthly Adjustment Amount) surcharges are determined by your MAGI from two years prior. Your 2026 Medicare premiums are based on your 2024 tax return.⁴ For 2026, the Tier 1 IRMAA threshold is $109,000 for single filers and $218,000 for joint filers — crossing that threshold adds $81.20/month per person to your Part B premium ($202.90 base → $284.10 total).

This has two timing implications:

A Roth conversion in 2026 affects your 2028 Medicare premiums. If you convert $150,000 and your other income is $80,000, your 2026 MAGI is $230,000 — above the MFJ Tier 1 threshold. Your 2028 Part B premium increases by $81.20/month per person.
The year you roll over does not itself trigger IRMAA. A direct traditional-to-traditional rollover is not taxable income and does not appear in your MAGI. Only Roth conversions create MAGI impact.

If you're rolling a $1.2 million 401(k) and plan to do Roth conversions, model the IRMAA impact over multiple years before deciding how much to convert in year one. A flat-fee rollover advisor can run this projection in a few hours; it's straightforward math once you have the IRS tables and your full income picture.

3. Employment event triggers

Job change with an outstanding 401(k) loan: the QPLO deadline

When you separate from your employer with an outstanding 401(k) loan, the plan will offset (reduce) your account balance by the loan amount — this is called a Qualified Plan Loan Offset (QPLO). Under TCJA 2017 (IRC § 402(c)(3)(C)), you have until the tax filing due date, including extensions, for the tax year in which the offset occurred to roll equivalent cash into an IRA and avoid the income tax and 10% penalty.⁵

If your loan offset occurs in 2026, your deadline is October 15, 2027 (assuming you file an extension). That gives you nearly 16 months to come up with the cash. For a $40,000 loan balance, missing this deadline costs approximately $15,000–$19,000 in taxes and penalties depending on your bracket.

Timing implication: Don't initiate a rollover until you know the final loan offset amount and have confirmed whether you can fund the rollover. If the loan offset is large and you don't have the cash, you may need to accept the tax hit rather than try to fund the rollover from depleted savings.

In-service rollover at 59½

If your plan allows in-service distributions and you are 59½ or older, you can roll a portion of your 401(k) to an IRA while still employed. This opens the Roth conversion window before you retire — potentially 4–8 extra conversion years. Most plans permit this; check your Summary Plan Description. The tradeoff is giving up ERISA creditor protection on the rolled amount and forfeiting any stable value or institutional fund options the plan offers.

4. Account-specific timing triggers

Before doing Backdoor Roth contributions: clear your pro-rata exposure

If you are a high earner making non-deductible (Backdoor) Roth IRA contributions, rolling a large pre-tax 401(k) to a traditional IRA can destroy that strategy. The pro-rata rule under IRC § 408(d)(2) requires you to treat all traditional IRA balances — including the pre-tax rollover — as a single pool when you do a Roth conversion. If you have $500,000 in pre-tax IRA and do a $7,000 Backdoor Roth, only 1.4% of the conversion is tax-free.¹

Two clean options: (1) roll the 401(k) to your new employer's plan instead of an IRA, preserving a zero traditional IRA balance for Backdoor Roth; (2) use a reverse rollover to move existing pre-tax IRA balances into your new employer's 401(k) before your Backdoor Roth contribution. Either approach has to be completed before December 31 of the year in which you are making the Backdoor Roth contribution.

Stable value fund equity wash restrictions

Many insurance company-administered plans (TIAA, Principal, John Hancock, Voya, Transamerica, and others) impose a "equity wash" provision on stable value funds: you must move stable value balances into an equity fund for 90 days before you can transfer them out of the plan entirely.⁶ Initiating a rollover without checking this restriction can strand part of your balance in the plan for 90 days while the rest transfers.

The workaround is to exchange the stable value holdings into a money market or equity fund inside the plan, wait 90 days, and then initiate the full rollover. Plan your rollover date accordingly — if you're rushing to open an IRA and start Roth conversions, a 90-day delay can push you into the next calendar year and change your tax planning.

Pending employer contributions and vesting

If you are close to a vesting cliff, leaving before it vests forfeits the unvested match. Similarly, annual profit-sharing contributions often aren't deposited until months after year-end. Initiating a rollover before the profit-sharing contribution arrives means you'll roll without it — the plan will make a second distribution or rollover for the late contribution, adding paperwork and potential delays.

Before initiating the rollover, ask your plan administrator: (1) Is my match fully vested? (2) Is there a pending profit-sharing or true-up contribution? (3) Are there any pending dividends or corporate action proceeds on employer stock?

What doesn't matter for most rollovers

Market timing is irrelevant for a direct rollover. In a trustee-to-trustee direct rollover, your old plan liquidates shares and transfers cash (or transfers in-kind) directly to the new custodian. There is no period where your money is out of the market. The IRA custodian reinvests in equivalent positions immediately. Waiting for a better market entry point on a rollover is not a strategy — it's delay with no mechanical benefit.

The one exception: if your plan holds employer stock in a brokerage window and you are evaluating the NUA (Net Unrealized Appreciation) strategy, the timing of the distribution relative to the stock price does matter. NUA treatment requires a lump-sum distribution in a single tax year, and the ordinary income tax is owed on the cost basis at the time of distribution. A significantly higher stock price at distribution increases the basis tax — though the NUA math still typically favors the strategy when basis is low relative to current value.

Decision guide: which timing factor applies to you?

Situation	Key timing consideration	What to do
Age 55–59½, left job, no bridge income needed	Rule of 55 doesn't help if you don't need early distributions	Roll to IRA when ready; no timing constraint
Age 55–59½, will need income before 59½	Rule of 55 is valuable — rolling forfeits it	Keep bridge income portion in plan; partial rollover only
Age 60–72, low-income retirement window	Roth conversion window — best rates you'll have	Roll to IRA immediately; begin annual conversions
Age 72+, not yet started RMDs	First RMD cannot be included in rollover	Take the RMD first; roll the remainder
Outstanding 401(k) loan at separation	QPLO tax deadline (TCJA 2017)	Roll equivalent cash by tax filing due date (Oct 15 if extension filed)
Doing Backdoor Roth contributions	Pro-rata rule kills Backdoor Roth if pre-tax IRA exists	Roll to new employer plan instead; or do reverse rollover first
Plan has stable value fund	Equity wash provision (90 days)	Exchange to equity fund now; roll after 90-day hold
Income-gap year (retired/laid off)	Best bracket for Roth conversion	Roll and convert in the same low-income year

Frequently asked questions

Is there a deadline to roll over a 401(k)?

For a direct rollover — where your plan sends funds directly to the receiving IRA — there is no time limit after leaving a job. For an indirect rollover (check payable to you), you have 60 days from receipt. Exception: if you have an outstanding 401(k) loan, the plan offsets the loan balance at separation, and under TCJA 2017 you have until the tax filing due date, including extensions, for that tax year to roll equivalent cash into an IRA and avoid income tax and the 10% penalty.

Can you roll over a 401(k) at any age?

Yes, with two caveats. First, if you are between 55 and 59½ and separated from the employer that holds the 401(k), rolling to an IRA permanently forfeits the Rule of 55 penalty-free access. Second, once you reach RMD age (73 for most current retirees), you must take your required minimum distribution for the year before rolling the remaining balance — you cannot include an RMD in a rollover.

When is the best time to roll over a 401(k) to a Roth IRA?

The best window is usually between your last paycheck and when Social Security and RMDs begin — typically ages 60–72. This is your lowest-income period, which means lower marginal rates on the conversion. Watch the IRMAA cliff at $109,000 single / $218,000 MFJ (2026) — a large Roth conversion can push your MAGI above that threshold and trigger a Medicare surcharge two years later.

Does it matter when during the year you roll over a 401(k)?

For a traditional-to-traditional direct rollover, the calendar timing is irrelevant — no tax is owed and there is no market gap. For a Roth conversion, the calendar does matter: conversions are ordinary income in the tax year they occur, so modeling your full-year income before converting in December helps you avoid accidentally crossing a tax bracket or IRMAA threshold.

What happens if you don't roll over your 401(k)?

Your balance stays in the old plan. Most plans allow this indefinitely — but if your balance is under $7,000, the plan may auto-cash out or auto-roll to an IRA after a waiting period under SECURE 2.0 § 304. Larger balances stay until you act or until the plan terminates. RMDs apply at age 73 regardless of whether you've rolled over.

Get help with the timing decision

The Rule of 55 trap, IRMAA cliff modeling, QPLO deadline planning, and Roth conversion sequencing interact in ways that are hard to optimize without running your specific numbers. A fee-only rollover specialist can map your situation to the right timing in a few hours — for a flat project fee, not a percentage of your balance.

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Related guides

Tax values verified August 2026 against IRS and CMS sources. IRMAA thresholds from CMS 2026 premium announcement; RMD ages from SECURE 2.0 Act § 107; Rule of 55 per IRC § 72(t)(2)(A)(v); QPLO deadline per TCJA 2017 IRC § 402(c)(3)(C).

Getting the timing right matters. The Rule of 55 window, IRMAA cliff, and Roth conversion sequencing interact in ways that change the effective cost of your rollover by tens of thousands of dollars depending on when and how you act. A fee-only advisor who has modeled these decisions before can identify the optimal path for your specific income, age, and account structure.