FICA taxes do not apply to 401(k) withdrawals, but income tax does

When you withdraw money from a 401(k), you do not pay FICA taxes (Social Security and Medicare taxes) on that withdrawal. FICA taxes only apply to wages you earn from employment. Once money is in a 401(k), it has already had FICA taxes withheld from your paychecks when you earned it.

What you do pay is federal income tax on the withdrawal amount. Your employer or plan administrator will withhold a percentage — usually 10 to 20 percent depending on the type of withdrawal — and send it to the IRS. You may also owe state income tax, depending on where you live.

The tax situation changes if you withdraw before age 59½. Early withdrawals trigger a 10 percent penalty tax on top of the income tax you already owe, unless you meet a narrow list of exceptions (like disability, medical expenses, or a series of equal payments). The penalty is separate from income tax and FICA.

Key Takeaways

  • FICA taxes (Social Security and Medicare) do not apply to 401(k) withdrawals because FICA was already paid when you earned the money.
  • Federal income tax does apply to withdrawals, and your plan will withhold 10 to 20 percent unless you request a different amount.
  • Withdrawals before age 59½ trigger a 10 percent penalty tax in addition to income tax, with limited exceptions.
  • State income tax may also apply depending on your state and the type of withdrawal.
  • The total tax you owe is calculated when you file your tax return; withholding is an estimate that may leave you owing more or getting a refund.

Why FICA does not apply to 401(k) money

FICA taxes fund Social Security and Medicare. They are collected only on wages — money you earn from a job. When your employer deducts money from your paycheck to put into your 401(k), FICA taxes are withheld on that amount at the time of the deduction. The money then sits in your account, and no further FICA is owed on it.

Once the money is in the 401(k), it belongs to you but is held in a retirement account. Withdrawals from retirement accounts are not considered wages, so FICA does not apply. This is true whether you withdraw at 59½, at 70, or earlier. The FICA obligation ended when you earned the original paycheck.

This is different from income tax, which does apply to withdrawals. The IRS treats 401(k) withdrawals as taxable income in the year you take them out, even though you did not earn them as wages in that year.

Income tax withholding on 401(k) withdrawals

When you request a withdrawal from your 401(k), your plan administrator is required to withhold federal income tax. The standard withholding rate is 20 percent for lump-sum distributions (a single large withdrawal). For periodic withdrawals (regular monthly or annual amounts), the withholding is calculated based on the W-4P form you complete, which works similarly to a W-4 for employment.

You can request a different withholding rate or no withholding at all, but if you choose not to withhold enough, you may owe a penalty when you file your tax return. The withholding is an estimate; your actual tax bill is determined when you file and depends on your total income for the year, your filing status, and other deductions.

The withheld amount is sent directly to the IRS on your behalf. When you file your tax return, the IRS credits that withholding against your total tax bill. If too much was withheld, you receive a refund. If too little was withheld, you owe the difference.

The 10 percent early withdrawal penalty

If you withdraw from your 401(k) before age 59½, you owe a 10 percent penalty tax on the amount withdrawn, in addition to income tax. This penalty is calculated on the withdrawal amount itself — not on the income tax you owe. For example, a $10,000 early withdrawal triggers a $1,000 penalty plus income tax on the full $10,000.

The penalty does not apply if you meet one of the IRS exceptions. Common exceptions include disability, substantial medical expenses (those exceeding 7.5 percent of your adjusted gross income), a series of substantially equal periodic payments, or withdrawal after separation from service at age 55 or older. Some plans also allow loans instead of withdrawals, which avoid the penalty entirely.

The 10 percent penalty is separate from both income tax and FICA. It is an additional cost of accessing your retirement money early, and it is withheld or owed when you file your return.

State income tax on 401(k) withdrawals

Most states that have an income tax also tax 401(k) withdrawals. The rate and rules vary by state. Some states withhold state income tax automatically; others do not, and you may owe the tax when you file your state return. A few states — including Florida, Texas, and Wyoming — do not have state income tax at all, so no state withholding applies.

If you move to a different state after taking a withdrawal, the state where you withdrew the money may still claim tax, or the state where you now live may. This can create a filing obligation in two states. Checking your state's tax agency website or speaking with a tax preparer can clarify your situation.

How withholding differs from what you actually owe

Withholding is not the same as your final tax bill. Your plan withholds a fixed percentage (usually 20 percent for lump sums) based on the withdrawal amount alone. Your actual tax bill depends on your total income for the year, your filing status, deductions, and credits.

If you have other income, the withdrawal may push you into a higher tax bracket, meaning you owe more than 20 percent. If the withdrawal is your only income that year, 20 percent withholding may be more than you owe, and you will receive a refund when you file. The only way to know for certain is to calculate your taxes when you file your return.

You can adjust withholding by completing a new W-4P form with your plan administrator before the withdrawal is processed. Some people request no withholding and pay the tax bill themselves when they file, though this requires having the money available to pay.

Roth 401(k) withdrawals and tax treatment

Roth 401(k) withdrawals follow different rules. If you have held the account for at least five years and are age 59½ or older, withdrawals are tax-free — no income tax, no FICA, no penalty. FICA was still paid on the money when you earned it, but the withdrawal itself is not taxed.

If you withdraw before meeting both conditions (five years and age 59½), the earnings portion of the withdrawal is taxed as income and may be subject to the 10 percent penalty. The contributions you made (the money you put in) can usually be withdrawn tax-free at any time. Your plan statement will show how much is contributions versus earnings.

Frequently Asked Questions

Do I have to pay FICA on a 401(k) withdrawal?

No. FICA taxes were already paid when you earned the money and contributed it to the 401(k). Withdrawals are not wages, so FICA does not apply. You do owe federal income tax on the withdrawal amount.

What if I don't want the plan to withhold taxes?

You can request no withholding by completing a W-4P form with your plan administrator. However, you will then owe the full tax bill when you file your return. If you don't pay enough throughout the year, you may owe a penalty for underpayment.

Can I avoid the 10 percent early withdrawal penalty?

Yes, if you meet an IRS exception such as disability, substantial medical expenses, or a series of equal payments. Some plans also allow loans instead of withdrawals. Check your plan documents or speak with your plan administrator about your options.

Will I owe more tax than what was withheld?

Possibly. The 20 percent withholding is an estimate. If you have other income or don't may have access to for certain deductions, your actual tax bill may be higher. You will owe the difference when you file your return.

How does a Roth 401(k) withdrawal differ?

Roth 401(k) withdrawals are tax-free if you are age 59½ and have held the account for five years. If you withdraw earlier, earnings are taxed and may be penalized, but contributions can usually be withdrawn tax-free.