Rolling over a 401(k) to a 403(b) is permitted under federal tax law: pre-tax 401(k) dollars can move into the pre-tax side of a 403(b), and designated Roth 401(k) dollars can move into a designated Roth 403(b).1Internal Revenue Service. Rollover Chart The transfer keeps the tax-advantaged status of your savings intact, but three things have to line up: the receiving 403(b) has to accept incoming rollovers, each type of money has to land in the right bucket, and you need a qualifying event that lets the money leave the old plan.
First, Confirm the 403(b) Accepts Rollovers
No retirement plan is required to accept rollover contributions.2Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions Some 403(b) sponsors block them to simplify administration. Before you touch any paperwork, call the 403(b) plan administrator and confirm two things: that the plan accepts rollovers at all, and that it accepts the specific type of money you’re moving — pre-tax, Roth, or both. If the plan document doesn’t allow it, the IRS rules don’t matter.
Match Each Type of Money to the Right Bucket
Not every dollar in a 401(k) is treated the same way, and the IRS requires each type to land in a matching account on the other end.
Pre-tax contributions and earnings. These go into the traditional side of the 403(b). This is the straightforward path and covers most balances.1Internal Revenue Service. Rollover Chart
Designated Roth 401(k) money. This must transfer into a designated Roth account within the 403(b). Any nontaxable Roth amounts must move via a direct trustee-to-trustee transfer.1Internal Revenue Service. Rollover Chart
After-tax non-Roth contributions. These are the trickiest. If your 401(k) holds after-tax contributions that were never converted to Roth, you cannot pull just those dollars out and leave the rest behind — any partial distribution must include some pre-tax money. Under IRS Notice 2014-54, though, a full distribution directed to multiple destinations at once is treated as a single distribution, so you can send all the pre-tax money to a traditional 403(b) or traditional IRA and all the after-tax money to a Roth IRA.3Internal Revenue Service. Rollovers of After-Tax Contributions in Retirement Plans
Getting the split wrong creates a tax bill you didn’t need. Verify with both plan administrators which bucket each portion of your balance falls into before initiating anything.
Use a Direct Rollover, Not an Indirect One
In a direct rollover, the 401(k) custodian sends the funds straight to the 403(b) custodian. You never touch the money, nothing is withheld, and no taxes are triggered.2Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
An indirect rollover works differently. The 401(k) provider pays the distribution to you, and the administrator withholds 20 percent for federal income tax before cutting the check. You then have 60 days to deposit the full original amount into the 403(b) — meaning you have to come up with the withheld 20 percent from your own pocket to complete the rollover in full. Whatever you fail to deposit within the 60-day window is treated as taxable income, and if you’re under 59½ it’s hit with an additional 10 percent early withdrawal penalty.2Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
If You Miss the 60-Day Window
The IRS allows you to self-certify a late rollover if the delay resulted from specific circumstances, including a financial institution error, a check that was misplaced and never cashed, serious illness or death of a family member, a postal error, damage to your home, or incarceration.4Internal Revenue Service. Revenue Procedure 2016-47 There is no IRS fee for self-certifying, but you must complete the rollover as soon as the reason no longer applies, generally within 30 days.5Internal Revenue Service. Retirement Plans FAQs Relating to Waivers of the 60-Day Rollover Requirement
You Need a Triggering Event
You cannot roll over your 401(k) whenever you feel like it. Federal rules require a distributable event before money can leave the plan. The most common trigger is separation from service — leaving the employer that sponsors the 401(k).6Internal Revenue Service. 401(k) Resource Guide – Plan Participants – General Distribution Rules
Other qualifying events include the complete termination of the 401(k) plan by the employer (with no successor plan established) and reaching age 59½ while still employed. That last one matters more than people realize. If you’re working somewhere with a 403(b) but still have a 401(k) at a former employer, reaching 59½ can unlock the ability to move that old balance. Hardship distributions become available at any age, but hardship money cannot be rolled over, so that path doesn’t help with consolidation.6Internal Revenue Service. 401(k) Resource Guide – Plan Participants – General Distribution Rules
What Can’t Be Rolled Over
Even when a rollover is otherwise allowed, some distributions are permanently ineligible.7Office of the Law Revision Counsel. 26 USC 402 – Taxability of Beneficiary of Employees Trust
- Required minimum distributions. Once you reach RMD age (currently 73), any amount the plan is required to distribute each year cannot be rolled over.2Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
- Hardship distributions. Money pulled out under a hardship provision stays out permanently.
- Substantially equal periodic payments over your life expectancy or over a period of ten years or more.
- Loans treated as distributions. If you defaulted on a plan loan and it became a deemed distribution, that amount generally cannot be rolled over.
If your 401(k) balance includes any of these, the plan administrator should separate them out before processing your rollover. Check the breakdown on your distribution statement.
Watch Out for an Outstanding 401(k) Loan
An unpaid plan loan catches people off guard. When you separate from service with a loan balance, the plan typically offsets your account by the loan amount, and that offset is treated as an actual distribution.8Internal Revenue Service. Plan Loan Offsets
A qualified plan loan offset triggered by separation gets a longer rollover window than the usual 60 days. You have until your tax filing deadline, including extensions, for the year the offset occurs — typically October 15 of the following year if you file an extension.8Internal Revenue Service. Plan Loan Offsets To avoid taxes and the early withdrawal penalty on the offset amount, contribute that same dollar amount from other funds into the 403(b) or an IRA by that deadline. Most people don’t realize this option exists, and the loan offset quietly becomes a taxable event they could have prevented.
Completing the Paperwork
Request a distribution or rollover form from the 401(k) plan administrator. Most providers have these available through an online participant portal, though some still route through HR. The form will ask for the legal name of the institution holding the 403(b), your account number at the new plan, and a delivery address.
Select the direct rollover option. This is what prevents the 20 percent withholding. The payee line on the check should read something like “FBO [your name],” with FBO standing for “for the benefit of,” followed by the receiving institution’s name. Some providers reverse the order, but the check should be made payable to the new custodian on your behalf, not to you personally.
Before submitting, check whether the 403(b) provider requires a letter of acceptance or an incoming rollover form on their end. Many do. Failing to coordinate this in advance can mean the receiving institution returns the check. Keep copies of everything you submit.
Check the 1099-R the Following January
The old 401(k) provider will issue a Form 1099-R reporting the distribution. For a direct rollover, Box 7 should contain Code G, which tells the IRS the distribution was a non-taxable direct rollover to an eligible retirement plan.9Internal Revenue Service. Instructions for Forms 1099-R and 5498 The taxable amount in Box 2a should be zero or blank.
Check both codes carefully. An incorrect code, particularly one reporting the amount as a normal distribution instead of a rollover, can flag it as taxable income and generate an IRS notice. If you spot an error, contact the old plan administrator and request a corrected Form 1099-R. The IRS requires the filer to correct the form as soon as an error is discovered.9Internal Revenue Service. Instructions for Forms 1099-R and 5498
Should You Actually Do It?
Being allowed to roll a 401(k) into a 403(b) isn’t the same as it being the right move. A few differences are worth weighing.
Investment Options
A 403(b) can hold only annuity contracts from insurance companies, custodial accounts invested in mutual funds, or (for church employees) retirement income accounts.10Internal Revenue Service. IRC 403(b) Tax-Sheltered Annuity Plans Many 401(k) plans offer a broader lineup, including index funds, target-date funds, brokerage windows, and company stock. If the 403(b) menu is limited to a handful of high-fee annuity products, rolling a well-diversified 401(k) into it could mean paying more for less flexibility. Review the fund lineup and fee disclosures before transferring.
The Age 55 Separation Rule
If you leave an employer during or after the calendar year you turn 55, you can take distributions from that employer’s plan without the 10 percent early withdrawal penalty. For qualified public safety employees in a governmental plan, the age drops to 50, or after 25 years of service, whichever comes first.11Internal Revenue Service. Topic No. 558, Additional Tax on Early Distributions From Retirement Plans Other Than IRAs The rule is tied to the plan where the money sits at the time of separation. If you roll old 401(k) money into a current employer’s 403(b), the age 55 rule applies based on when you separate from the current employer, not the old one. That’s fine if you plan to stay put until at least 55. But if you’re already between 55 and 59½ and thinking about early retirement from the new job, make sure the rollover doesn’t lock up money you could otherwise access penalty-free.
Still-Working RMD Delay
If you’re past age 73 and still working, most employer plans let you delay required minimum distributions until the year you actually retire, as long as you don’t own 5 percent or more of the employer. This applies to 403(b) plans as it does to 401(k) plans.12Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs Rolling an old 401(k) into a current employer’s 403(b) can consolidate those assets under the still-working exception, potentially deferring RMDs on the entire combined balance. Whether the specific 403(b) plan’s terms allow this treatment for rolled-in money varies, so confirm with the plan administrator before assuming you’ll get the delay on the full amount.
Creditor Protection
Most 401(k) plans fall under ERISA, which provides strong federal protection against creditors both inside and outside of bankruptcy. Many 403(b) plans are also ERISA-governed, but some, particularly those offered by churches and certain governmental employers, are exempt from ERISA. A non-ERISA 403(b) does not receive the same automatic federal bankruptcy exclusion that ERISA plans enjoy.13Department of Labor. Employee Benefits and Bankruptcy Protection for those assets then depends on state exemption laws, which vary widely. If you’re rolling a fully ERISA-protected 401(k) into a non-ERISA 403(b), you could be trading down in creditor protection. This rarely matters unless you’re in a profession with significant liability exposure or facing potential financial distress, but it’s worth knowing before moving a large balance.