Rolling over a 403(b) to a 401(k) is allowed under federal tax law, but the transfer only works if your former 403(b) permits a distribution and your new employer’s 401(k) accepts incoming rollovers. The cleanest path is a direct rollover, where the money moves provider-to-provider and never touches your bank account. An indirect rollover is possible too, but it triggers a mandatory 20% federal withholding and starts a 60-day clock to get the full original amount into the new plan.
When You Can Actually Move the Money
You can’t pull funds out of a 403(b) whenever you feel like it. Federal law restricts distributions of salary-reduction contributions to a short list of events: leaving your employer, reaching age 59½, becoming disabled, death, or a qualifying hardship. These restrictions sit in a different corner of the tax code than the rollover rules, but they matter because you can’t roll over money you aren’t yet allowed to receive.
Once a qualifying event happens, the rollover mechanics take over. The tax code lets you transfer a 403(b) distribution to an eligible retirement plan, including a 401(k), without owing income tax on the amount transferred, as long as the money lands in the new plan. Separation from service is by far the most common trigger. If you’re moving from a nonprofit or public-school job to a private-sector employer with a 401(k), leaving that old job is what unlocks the rollover.
The receiving 401(k) also has to be willing to take the money. Federal law does not require plans to accept incoming rollovers.1Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions Most large 401(k) plans do, but some smaller ones or plans with restrictive documents don’t. Confirm this with the new employer’s benefits department before your old provider cuts a check.
Direct Rollover Versus Indirect Rollover
This is the single most consequential decision in the process, and getting it wrong costs real money.
In a direct rollover, the 403(b) provider sends the funds straight to the new 401(k). The check is made payable to the new plan’s custodian “for the benefit of” you, never to you personally. No taxes are withheld, and the IRS treats the entire amount as a nontaxable transfer. This is what you want.
In an indirect rollover, the 403(b) provider sends the check to you. Federal law requires them to withhold 20% for federal income taxes before mailing it.2Office of the Law Revision Counsel. 26 USC 3405 – Special Rules for Pensions, Annuities, and Certain Other Deferred Income If your 403(b) balance is $100,000, you receive a check for $80,000. To complete a tax-free rollover, you have to deposit the full $100,000 into the new 401(k) within 60 days, which means finding $20,000 from your own pocket to replace the withheld amount. You’ll get that $20,000 back as a refund when you file, but in the meantime you’re floating a serious sum. Deposit only the $80,000 you received and the missing $20,000 becomes a taxable distribution, plus a 10% early withdrawal penalty if you’re under 59½.
The IRS can waive the 60-day deadline if you missed it due to circumstances beyond your control, but a waiver isn’t guaranteed and involves either self-certification or a private letter ruling.3Internal Revenue Service. Retirement Plans FAQs Relating to Waivers of the 60-Day Rollover Requirement The direct rollover sidesteps all of it.
How the Transfer Actually Works
Gather Information From Both Sides
Before filling out any forms, contact both providers to collect what each side needs. From the new 401(k): the plan name, the plan’s tax identification number or Plan ID, the custodian’s name and mailing address, and your new account number if one exists. From the old 403(b): a distribution or rollover-out form, usually available through an online portal or the benefits line.
Complete the Distribution Paperwork
On the 403(b) distribution form, select the direct rollover option. The form asks for the receiving plan’s details so the check is made payable to the correct custodian. Double-check every field. An incorrect Plan ID or misspelled custodian name can cause the new provider to reject the check and add weeks to the timeline. Some 403(b) providers require a signature guarantee; outright notarization is uncommon but not unheard of. Submit through whatever channel the provider accepts.
Track the Transfer
After processing, the 403(b) provider liquidates your investments into cash and issues either a physical check or an electronic wire. Physical checks typically arrive within seven to ten business days. If the check is mailed to your home address rather than to the new plan, forward it immediately. Most providers give you a confirmation number to track the status online. The full process usually takes two to four weeks.
Reinvesting Once the Money Lands
The money arrives in your new 401(k) as cash sitting in a settlement or default fund, usually a money market or stable value fund with minimal returns. You have to log in and choose your investment allocations. The plan will not automatically mirror what you held in the old 403(b). This is where people lose money through inaction rather than bad decisions. Verify that the deposited amount matches what the old plan distributed, then pick your investments promptly.
Keep in mind that your money earns nothing meaningful while in transit. With a direct rollover the gap is typically two to four weeks. With an indirect rollover involving a mailed check it can stretch longer. For large balances, even a few weeks out of the market can matter, though it can also work in your favor if markets drop during that window. Either way, you’re exposed to timing risk you didn’t choose.
Roth and After-Tax Contributions
If your 403(b) includes a designated Roth account, those funds can only go into another Roth account, either a Roth 401(k) at the new employer or a Roth IRA. They cannot go into the traditional pre-tax side of a 401(k). The new plan must specifically offer a designated Roth 401(k) option to receive them. If it doesn’t, a Roth IRA is your alternative.
The five-year holding period for qualified Roth distributions carries over based on whichever account is older. If you’ve had your Roth 403(b) for six years and roll it into a brand-new Roth 401(k), the six-year clock transfers and you’ve already satisfied the five-year requirement. This matters because Roth distributions are only fully tax-free and penalty-free once you’re past both age 59½ and the five-year mark.
Some 403(b) plans also allow non-Roth after-tax contributions, money you contributed after taxes that isn’t in a Roth account. You generally can’t withdraw the after-tax portion by itself; any partial distribution must include a proportional share of pre-tax money. One strategy is to take a full distribution and split it: pre-tax amounts to the traditional 401(k) or a traditional IRA, after-tax amounts to a Roth IRA. The IRS permits this when the distributions are directed to multiple destinations simultaneously.
Outstanding 403(b) Loans
An unpaid loan from your 403(b) when you leave your employer is typically treated as a distribution, called a plan loan offset. That offset amount becomes taxable income in the year it occurs, and if you’re under 59½, the 10% early withdrawal penalty applies on top.
You can avoid those consequences by rolling the offset amount into the new 401(k) or an IRA. For a qualified plan loan offset, meaning one that happens because you left employment or the plan terminated, you get extra time. Instead of the usual 60 days, the deadline extends to your tax filing due date for the year of the offset, including extensions. A six-month extension pushes your rollover deadline from mid-April to mid-October.
The catch: you need cash equal to the loan balance to deposit into the new plan, because the old provider isn’t sending that money. They already netted it against your loan. For anyone with a large outstanding balance, that’s a real out-of-pocket cost to avoid the tax hit.
Required Minimum Distributions
If you’ve reached the age when required minimum distributions apply, currently 73 and rising to 75 in 2033, you must take your RMD for the year before rolling over the remaining balance. RMD amounts cannot be rolled over into another tax-deferred account.4Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs Trying to roll over an amount that includes your RMD creates a paperwork mess and potential penalties.
One nuance: if you’re still working for the employer that sponsors your 403(b), you can delay RMDs from that plan until you actually retire, as long as you don’t own more than 5% of the organization. Once you separate, the clock starts. If you’re rolling into a 401(k) at a new employer where you’re still working, the still-working exception at the new plan may allow continued deferral on the rolled-over funds, but only if that plan’s documents permit it.
Watch for pre-1987 contributions if your 403(b) has been around that long. Those amounts have a separate, more favorable RMD timeline and don’t need to be distributed until you turn 75 or retire, whichever is later. Rolling them into a 401(k) can eliminate that special treatment, because the receiving plan won’t track those amounts separately.
Surrender Charges on 403(b) Annuity Contracts
Many 403(b) plans, particularly older ones at schools and hospitals, are funded through annuity contracts rather than mutual funds. These contracts often include surrender charges that apply if you withdraw money before the end of a surrender period, which commonly runs six to eight years. The charges typically start around 6–7% in the first year and decline by about one percentage point annually until they reach zero.
A surrender charge is separate from taxes or IRS penalties. It’s a fee the insurance company charges for early termination of the contract, and it comes directly out of your account balance. Call your 403(b) provider before initiating a rollover and ask whether any surrender charges apply. If they do, calculate whether it makes more sense to wait until the surrender period expires or absorb the charge and move now. For someone a year or two from the end of that window, waiting can save thousands.
The Rule of 55 and Early Access
If you separate from service during or after the year you turn 55, distributions from a qualified retirement plan, including a 403(b), are exempt from the 10% early withdrawal penalty.5Internal Revenue Service. Topic No. 558, Additional Tax on Early Distributions From Retirement Plans This is commonly called the “Rule of 55.” For public safety employees of state or local governments, the age drops to 50.
A rollover can work against you here. The Rule of 55 exception applies to the plan you separated from. At 56, leaving your nonprofit employer, you could take penalty-free distributions from that 403(b) right now. Roll those funds into a 401(k) at a new employer where you’re still working and you’ve locked the money back up. Penalty-free access won’t return until you separate from the new employer (again at 55 or older) or reach 59½. If early access matters, think carefully before rolling the entire balance. You might keep some money in the old 403(b) for near-term flexibility and roll the rest.
Tax Reporting After the Rollover
A direct rollover generates two pieces of tax documentation. The old 403(b) provider issues IRS Form 1099-R for the year of the distribution. For a direct rollover, the form shows the total amount in Box 1 and zero in Box 2a (taxable amount), with distribution Code G in Box 7 to signal a direct rollover to an eligible retirement plan.6Internal Revenue Service. 2025 Instructions for Forms 1099-R and 5498 Even though no tax is owed, you still report this on your return. Leaving it off can trigger an IRS inquiry.
The receiving 401(k) does not issue a Form 5498. That form is used only by IRA custodians to report contributions to individual retirement accounts.7Internal Revenue Service. Instructions for Forms 1099-R and 5498 (2025) The new 401(k) will show the rollover as a contribution on your account statement. Keep that statement with your Form 1099-R and any transfer confirmation numbers. Together, they prove the money kept its tax-deferred status if the IRS ever questions the transaction.
For an indirect rollover, the Form 1099-R shows the 20% withholding in Box 4. Report the distribution on your return and claim credit for the withheld taxes. As long as you completed the rollover within 60 days and deposited the full original amount, the distribution isn’t taxable, but you’ll need to demonstrate that on the return.
Common Mistakes to Avoid
- Not confirming the new plan accepts rollovers. Plans aren’t required to. Verify before your old provider cuts a check.
- Choosing an indirect rollover by accident. If you don’t specifically select “direct rollover” on the distribution form, the default may be an indirect distribution with 20% withheld.
- Missing the 60-day window on an indirect rollover. If the check comes to you and you don’t deposit the full amount into the new plan within 60 days, the IRS treats the entire distribution as taxable income.
- Rolling Roth funds into a traditional account. Designated Roth 403(b) money has to go to a Roth 401(k) or Roth IRA. Mixing it into a traditional account creates a taxable event and can be difficult to unwind.
- Forgetting about surrender charges. If your 403(b) uses an annuity contract, check whether surrender charges apply before you initiate the transfer.
- Trying to roll over your RMD. At 73 or older after separating from service, take the required minimum distribution for the year first. The RMD portion isn’t eligible for rollover.
- Leaving rolled-over funds uninvested. The money arrives as cash. If you don’t select new investments, it sits in a low-return default fund indefinitely.