Yes, California does tax 401(k) distributions. Traditional 401(k) withdrawals are treated as ordinary income and taxed at the state’s regular rates, which run from 1% up to 13.3% depending on your total taxable income for the year. There is no special California exemption or deduction for retirement income. Whether you actually owe anything depends heavily on where you live when the money hits your account: residents pay on every dollar, non-residents are generally protected by federal law, and part-year residents fall in between.
How California Taxes a 401(k) Withdrawal
When you pull money from a traditional 401(k), California adds that amount to the rest of your taxable income for the year. The state’s progressive brackets start at 1% and climb to 12.3% for the highest earners.1California Franchise Tax Board. 2025 California Tax Rate Schedules An additional 1% surcharge applies to taxable income above $1 million, pushing the effective top rate to 13.3%.
Because the withdrawal stacks on top of your other income, a big distribution can push you into higher brackets. Say you earn $100,000 in wages and take a $150,000 lump sum from your 401(k). The first dollars of that withdrawal might sit at 6% or 8%, but the top portion could land in the 9.3% bracket or higher. Spreading distributions across multiple years, when the plan allows, is one of the simplest ways to keep the marginal rate down.
Early Withdrawals Before 59½
The federal government adds a 10% penalty when you take a 401(k) distribution before age 59½, on top of regular income tax.2Internal Revenue Service. About Retirement Exceptions to Tax on Early Distributions California does not add its own early-withdrawal penalty. You still owe California income tax on the full distribution, but the state does not layer a separate percentage on top the way the IRS does.
The federal 10% is waived in several situations: separation from your employer during or after the year you turn 55 (age 50 for certain public safety workers), substantially equal periodic payments, permanent disability, and qualified birth or adoption withdrawals up to $5,000.2Internal Revenue Service. About Retirement Exceptions to Tax on Early Distributions These exceptions kill the penalty. They do not eliminate the income tax owed to either the IRS or California.
Roth 401(k) Distributions
Roth 401(k) money follows different rules because you already paid tax on the contributions. A qualified Roth distribution is completely tax-free at both the federal and California level. Two conditions have to be met at the same time: five years must have passed since January 1 of the year you made your first Roth 401(k) contribution, and you must be at least 59½, permanently disabled, or deceased (with the distribution going to your beneficiary).3Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts
If a Roth distribution doesn’t meet both conditions, the tax treatment splits. Your original contributions still come back tax-free. Only the earnings portion is taxable, and if you’re under 59½, those earnings may also trigger the federal 10% penalty. California taxes the earnings portion as ordinary income but, consistent with its handling of traditional early withdrawals, adds no separate state penalty.
Required Minimum Distributions
Once you reach the applicable age, the IRS requires annual minimum withdrawals from a traditional 401(k). If you were born between 1951 and 1959, RMDs begin the year you turn 73. If you were born in 1960 or later, the age is 75.4Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs You have until April 1 of the year after you hit the age to take your first RMD, though delaying means doubling up two distributions in the same calendar year.
California taxes RMDs exactly the same as any other traditional 401(k) distribution: as ordinary income at your marginal rate. There is no state-level exclusion for RMD amounts, and age doesn’t change that.
If You’ve Moved Out of California
Federal law shields former residents from California tax on qualified retirement plan distributions. Under 4 U.S.C. § 114, no state can tax retirement income paid to someone who is no longer a resident.5Office of the Law Revision Counsel. 4 US Code 114 – Limitation on State Income Taxation of Certain Pension Income This applies even if every dollar in your 401(k) was earned while you worked in California. Once you’ve established residency somewhere else, the state cannot reach it.
The protection is broad. It covers 401(k)s, 403(b)s, 457 plans, traditional and Roth IRAs, SEP IRAs, SIMPLE IRAs, and government pensions.5Office of the Law Revision Counsel. 4 US Code 114 – Limitation on State Income Taxation of Certain Pension Income Nothing special is required to claim it beyond filing as a non-resident.
The Non-Qualified Deferred Compensation Gap
One category sits outside this shield: non-qualified deferred compensation plans. These employer arrangements fall outside the tax code’s qualified plan rules, and 4 U.S.C. § 114 doesn’t cover them. California can tax NQDC payments received by non-residents to the extent the compensation was earned from work performed in the state.
The calculation is an apportionment. If 70% of the deferred compensation was earned while you worked in California and 30% elsewhere, California taxes 70% of each payout as California-source income, reported on Form 540NR.6Franchise Tax Board. Form 540NR California Nonresident or Part-Year Resident Income Tax Return If you have substantial NQDC tied to California work, the state tax bill can be meaningful years after you’ve left.
Part-Year Residents and the Timing Question
Part-year residents get tripped up in the year they move in or out. The rule is straightforward: California taxes you as a resident on income received during the portion of the year you lived in the state, and as a non-resident for the rest. A 401(k) withdrawal received while you’re still a California resident is fully taxable by the state. A withdrawal received after you’ve established domicile elsewhere is protected by the same federal law that covers full non-residents.
Timing is everything if you’re planning a move. Taking a large distribution before you’ve actually relocated means the entire amount is subject to California tax. Waiting until after you’ve changed your domicile can save thousands. Part-year residents file Form 540NR to calculate the portion of income attributable to the California-resident period.6Franchise Tax Board. Form 540NR California Nonresident or Part-Year Resident Income Tax Return
Rollovers Aren’t Taxable if You Do Them Right
Moving money from one 401(k) to another qualified account or to an IRA is not a taxable event when handled correctly. The cleanest method is a direct rollover, where your plan administrator sends the funds straight to the new account. No taxes are withheld, and nothing appears as taxable income on your California return.7Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
An indirect rollover is messier. The plan pays the money to you, and 20% is withheld for federal taxes before it hits your bank account. You then have 60 days to deposit the full original distribution amount, not just what actually landed in your account, into a new qualified plan. That means covering the withheld 20% out of pocket. Receive $50,000 with $10,000 withheld, and you have to deposit the full $50,000 within 60 days. Deposit only the $40,000 you received, and the missing $10,000 is treated as a taxable distribution, subject to federal and California income tax, plus the 10% federal penalty if you’re under 59½.7Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions You get the withholding back eventually as a refund, but the cash flow gap catches people off guard. A direct rollover avoids the whole problem.
Withholding, Reporting, and Estimated Payments
Your plan administrator reports every 401(k) distribution on Form 1099-R. Box 1 shows the total, Box 2a shows the taxable portion, and Box 14 shows any California state tax withheld. Residents report the Box 2a amount on Form 540. Non-residents and part-year residents with taxable California-source retirement income use Form 540NR.6Franchise Tax Board. Form 540NR California Nonresident or Part-Year Resident Income Tax Return If you live outside California, federal law bars the plan from withholding California income tax from your distributions.
A big withdrawal can leave you owing a lot in April if withholding falls short. California requires estimated tax payments if you expect to owe $500 or more after withholding and credits. To avoid an underpayment penalty, your total payments (withholding plus estimated) must equal the lesser of 90% of your current-year liability or 100% of what you owed the prior year.8Franchise Tax Board. 2025 Instructions for Form 540-ES Estimated Tax for Individuals If you know a large one-time distribution is coming, running the numbers ahead of time and making an estimated payment shortly after you receive the money is far cheaper than a penalty later.