Done right, a 401(k) rollover is 100% tax-free. Done wrong, you could owe thousands in taxes and penalties. This guide covers every scenario.
The basic rule: direct rollovers are tax-free
When you execute a direct rollover from a 401(k) to a Traditional IRA, no taxes are due at the time of the transfer. The money stays in a tax-deferred environment and continues to grow without triggering any immediate tax liability.
You'll still owe income taxes when you take distributions in retirement — that's the deal with pre-tax retirement accounts. But the rollover itself? Zero tax.
What triggers a taxable event?
Three scenarios create tax consequences during a rollover:
#1. Indirect rollover where you miss the 60-day deadline
If funds are sent to you (not directly to the new IRA) and you don't complete the deposit within 60 days, the entire amount is treated as ordinary income — and you'll owe a 10% early withdrawal penalty if you're under 59½.
#2. Mandatory 20% withholding on indirect rollovers
Your plan is legally required to withhold 20% of any indirect rollover for federal taxes. Even if you deposit the full amount within 60 days, you won't get the withheld portion back until you file your tax return — and only if you came up with the difference from other funds.
#3. Roth conversion — intentional, but taxable
Rolling pre-tax 401(k) funds into a Roth IRA (a "conversion") is a taxable event by design. You pay income taxes on the converted amount in the year of conversion, but future growth and withdrawals are tax-free. Whether this makes sense depends on your current vs. future tax rate.
The after-tax (basis) exception
Many 401(k)s allow after-tax (non-deductible) contributions beyond the standard pre-tax limit. These after-tax contributions have already been taxed, so they can be rolled into a Roth IRA tax-free — while the pre-tax portion rolls into a Traditional IRA. This is called the "mega backdoor Roth" strategy. Your advisor will identify if you have any after-tax basis.
State tax considerations
Most states follow federal tax treatment for rollovers — if it's not federally taxable, it's not state-taxable. However, a few states have specific rules. Your advisor will confirm your state's treatment before you initiate.
Reporting a rollover on your taxes
Even if the rollover is non-taxable, you'll receive a **1099-R** from your old plan and need to report it on your tax return. You'll also file a **Form 8606** if you make any non-deductible IRA contributions or execute a Roth conversion.
Your advisor can walk you through what to expect at tax time so there are no surprises.
Three scenarios create tax consequences during a rollover:
#
1. Indirect rollover where you miss the 60-day deadline
If funds are sent to you (not directly to the new IRA) and you don't complete the deposit within 60 days, the entire amount is treated as ordinary income — and you'll owe a 10% early withdrawal penalty if you're under 59½.
#2. Mandatory 20% withholding on indirect rollovers
Your plan is legally required to withhold 20% of any indirect rollover for federal taxes. Even if you deposit the full amount within 60 days, you won't get the withheld portion back until you file your tax return — and only if you came up with the difference from other funds.
#3. Roth conversion — intentional, but taxable
Rolling pre-tax 401(k) funds into a Roth IRA (a "conversion") is a taxable event by design. You pay income taxes on the converted amount in the year of conversion, but future growth and withdrawals are tax-free. Whether this makes sense depends on your current vs. future tax rate.
The after-tax (basis) exception
Many 401(k)s allow after-tax (non-deductible) contributions beyond the standard pre-tax limit. These after-tax contributions have already been taxed, so they can be rolled into a Roth IRA tax-free — while the pre-tax portion rolls into a Traditional IRA. This is called the "mega backdoor Roth" strategy. Your advisor will identify if you have any after-tax basis.
State tax considerations
Most states follow federal tax treatment for rollovers — if it's not federally taxable, it's not state-taxable. However, a few states have specific rules. Your advisor will confirm your state's treatment before you initiate.
Reporting a rollover on your taxes
Even if the rollover is non-taxable, you'll receive a **1099-R** from your old plan and need to report it on your tax return. You'll also file a **Form 8606** if you make any non-deductible IRA contributions or execute a Roth conversion.
Your advisor can walk you through what to expect at tax time so there are no surprises.
Your plan is legally required to withhold 20% of any indirect rollover for federal taxes. Even if you deposit the full amount within 60 days, you won't get the withheld portion back until you file your tax return — and only if you came up with the difference from other funds.
#
3. Roth conversion — intentional, but taxable
Rolling pre-tax 401(k) funds into a Roth IRA (a "conversion") is a taxable event by design. You pay income taxes on the converted amount in the year of conversion, but future growth and withdrawals are tax-free. Whether this makes sense depends on your current vs. future tax rate.
The after-tax (basis) exception
Many 401(k)s allow after-tax (non-deductible) contributions beyond the standard pre-tax limit. These after-tax contributions have already been taxed, so they can be rolled into a Roth IRA tax-free — while the pre-tax portion rolls into a Traditional IRA. This is called the "mega backdoor Roth" strategy. Your advisor will identify if you have any after-tax basis.
State tax considerations
Most states follow federal tax treatment for rollovers — if it's not federally taxable, it's not state-taxable. However, a few states have specific rules. Your advisor will confirm your state's treatment before you initiate.
Reporting a rollover on your taxes
Even if the rollover is non-taxable, you'll receive a **1099-R** from your old plan and need to report it on your tax return. You'll also file a **Form 8606** if you make any non-deductible IRA contributions or execute a Roth conversion.
Your advisor can walk you through what to expect at tax time so there are no surprises.
Many 401(k)s allow after-tax (non-deductible) contributions beyond the standard pre-tax limit. These after-tax contributions have already been taxed, so they can be rolled into a Roth IRA tax-free — while the pre-tax portion rolls into a Traditional IRA. This is called the "mega backdoor Roth" strategy. Your advisor will identify if you have any after-tax basis.
State tax considerations
Most states follow federal tax treatment for rollovers — if it's not federally taxable, it's not state-taxable. However, a few states have specific rules. Your advisor will confirm your state's treatment before you initiate.
Reporting a rollover on your taxes
Even if the rollover is non-taxable, you'll receive a **1099-R** from your old plan and need to report it on your tax return. You'll also file a **Form 8606** if you make any non-deductible IRA contributions or execute a Roth conversion.
Your advisor can walk you through what to expect at tax time so there are no surprises.
Even if the rollover is non-taxable, you'll receive a **1099-R** from your old plan and need to report it on your tax return. You'll also file a **Form 8606** if you make any non-deductible IRA contributions or execute a Roth conversion.
Your advisor can walk you through what to expect at tax time so there are no surprises.