Employer contributions to a traditional 401(k) are not taxed when they land in your account, and they are taxed as ordinary income when you withdraw them in retirement. That is the short version of how employer 401(k) contributions are taxed. The longer version depends on whether the match goes into a traditional (pre-tax) or Roth (after-tax) account, whether you are vested when you leave the job, how old you are when you take the money out, and what you do with the balance if you switch employers.
At the Time of Deposit: Nothing
When your employer drops matching or nonelective dollars into your traditional 401(k), those dollars are not part of your gross income for the year. Federal regulations treat contributions to a qualified cash or deferred arrangement as excluded from income at the time of deposit.1eCFR. 26 CFR 1.401(k)-1 – Certain Cash or Deferred Arrangements The match will not appear on your W-2 as taxable wages, and you owe the IRS nothing on it until distributions begin.
The employer match also escapes payroll taxes. Your own salary deferrals still get hit with Social Security tax (6.2%) and Medicare tax (1.45%) even though they avoid federal income tax. Employer matching and nonelective contributions are exempt from both.2Internal Revenue Service. Retirement Plan FAQs Regarding Contributions – Are Retirement Plan Contributions Subject to Withholding for FICA, Medicare or Federal Income Tax? Every dollar the employer puts in gets to work immediately without any tax withheld.
Vesting Comes First
The tax picture only matters for money you actually keep. Employer contributions are often subject to a vesting schedule, which determines how much of the match you own based on years of service. Leave before you are fully vested and you forfeit the unvested portion. You never owe tax on money that reverts to the plan.
Federal rules allow two main vesting structures for 401(k) plans:3Internal Revenue Service. Retirement Topics – Vesting
- Cliff vesting: you own 0% of employer contributions until you hit a set number of years (up to three), at which point you become 100% vested at once.
- Graded vesting: your vested percentage rises each year, reaching 100% after no more than six years. A common schedule vests 20% after two years and adds 20% annually through year six.
Your own paycheck contributions are always 100% vested from day one. The schedule only touches what the employer puts in. Some plans vest the match immediately; many do not. Check your plan’s summary document before assuming the full balance is yours.
Ordinary Income Tax on Withdrawal
The bill comes due when you take money out. Distributions from a qualified 401(k) plan are taxable to you in the year you receive them.4Office of the Law Revision Counsel. 26 USC 402 – Taxability of Beneficiary of Employees Trust Because the employer match went in pre-tax, the whole withdrawal — the original contribution plus every dollar of investment growth — is taxed as ordinary income at your marginal federal rate that year.
The same rate applies to money that came from your employer and money that came from your own pre-tax deferrals. Withdraw $50,000 in a year when your marginal rate is 22% and you owe $11,000 in federal income tax on the distribution regardless of which side of the account it came from. Retirees often spread withdrawals across multiple years to stay in lower brackets.
State income tax may apply too. Most states with an income tax treat 401(k) distributions like other ordinary income, though some offer partial exemptions for retirement income and a handful of states have no income tax at all. Check your state’s rules before estimating your total retirement tax burden.
The 10% Early Withdrawal Penalty
Take money out before age 59½ and you generally owe a 10% additional tax on top of the ordinary income tax.5Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions The penalty applies to the full taxable amount, employer match and earnings included. On a $20,000 early withdrawal, the penalty alone is $2,000 before income tax.
Several exceptions eliminate the 10%, though the distribution is still taxed as ordinary income. Common ones include:5Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
- Total and permanent disability.
- Unreimbursed medical expenses exceeding 7.5% of your adjusted gross income.
- Substantially equal periodic payments taken over your life expectancy.
- Separation from service after reaching age 55, or age 50 for certain public safety employees.
Required Minimum Distributions
You cannot defer the tax on employer contributions forever. Once you turn 73, you must take required minimum distributions from your traditional 401(k) each year whether you need the money or not.6Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs The amount is calculated from your account balance and an IRS life expectancy table, and each RMD is taxed as ordinary income.
If you are still working at 73 and do not own 5% or more of the company sponsoring the plan, you can generally delay RMDs from that employer’s 401(k) until you actually retire.6Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs Under the SECURE 2.0 Act, the RMD starting age is scheduled to rise to 75 beginning in 2033.
Roth-Designated Employer Contributions
Before the SECURE 2.0 Act took effect in late 2022, all employer matching contributions went into a pre-tax account, even if your own deferrals went into a Roth 401(k). The law now allows employers to offer matching and nonelective contributions on an after-tax Roth basis.7Internal Revenue Service. SECURE 2.0 Act Changes Affect How Businesses Complete Forms W-2 Not every employer has added the option, so ask your plan administrator whether it is available.
If you elect a Roth-designated employer match, the contribution is included in your gross income for the year it is made.8Office of the Law Revision Counsel. 26 USC 402A – Optional Treatment of Elective Deferrals as Roth Contributions You owe federal income tax on the amount up front, which raises your current tax bill. Your employer does not withhold income tax or payroll taxes from the contribution itself. You settle up when you file your return, based on a Form 1099-R the plan issues.7Internal Revenue Service. SECURE 2.0 Act Changes Affect How Businesses Complete Forms W-2
One structural difference matters. Roth-designated employer contributions must be fully vested at the time they are made.8Office of the Law Revision Counsel. 26 USC 402A – Optional Treatment of Elective Deferrals as Roth Contributions Unlike a traditional match, a Roth employer match is yours immediately.
The payoff arrives in retirement. Qualified distributions from a Roth 401(k), including the employer-match portion and all investment growth, come out completely tax-free. To qualify, you must have held the designated Roth account for at least five tax years and be at least 59½, disabled, or deceased.9Internal Revenue Service. 10Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions The funds continue to grow tax-deferred and you do not report the rollover as income.
An indirect rollover works differently. Your old plan is required to withhold 20% of the taxable distribution for federal income taxes. You then have 60 days to deposit the full distribution, including the 20% that was withheld (which you must replace from other funds), into a new retirement account. Complete the rollover within that window and the entire distribution is tax-free, with the withheld amount refunded when you file. Miss the deadline or deposit less than the full amount, and the shortfall is treated as a taxable distribution and may also trigger the 10% early withdrawal penalty if you are under 59½.11Internal Revenue Service. Topic No. 413, Rollovers From Retirement Plans
Rolling pre-tax employer contributions into a Roth IRA rather than a traditional IRA or another 401(k) is allowed, but it triggers a tax bill. The full converted amount is included in your gross income for that year, because you are moving money from a tax-deferred account into one that pays out tax-free later.
What Happens if Contributions Exceed the Limit
The IRS caps the combined total that can go into your 401(k) each year from all sources: your own deferrals, the employer match, and any other employer contributions. If the total exceeds the annual limit, the excess loses its tax-deferred treatment. The IRS requires excess deferrals, and any earnings on them, to be distributed back to you before your tax-filing deadline for that year.12Internal Revenue Service. Consequences to a Participant Who Makes Excess Annual Salary Deferrals Correct the excess in time and you simply pay income tax on the returned amount in the year of the contribution.
Miss the deadline and leave the excess in the account, and you face double taxation. The excess is taxed in the year it was contributed and taxed again when you withdraw it in retirement.12Internal Revenue Service. Consequences to a Participant Who Makes Excess Annual Salary Deferrals The situation most often arises when someone contributes to 401(k) plans at two different employers in the same year and the combined deferrals push past the annual limit.