Tax code 150 indicates that an employee is exempt from federal income tax withholding under IRS rules. This means no federal income tax is deducted from their paycheck, though Social Security and Medicare taxes still apply. The code appears on Form W-4 and is used by employers to calculate withholdings.
Employers use tax codes to determine how much federal income tax to withhold from an employee's wages. Code 150 specifically signals that the employee has claimed exemption status on their W-4 form. This exemption applies only if the employee had no federal income tax liability in the prior year and expects none in the current year. The IRS requires employees to meet strict criteria to qualify.
For example, if an individual earned $12,000 in 2023 with no other income and filed a tax return showing zero tax due, they may claim exemption status. If they file a new W-4 with code 150, their employer stops withholding federal income tax. However, the employee remains responsible for paying any owed taxes when filing their annual return.
When an employee selects code 150 on their W-4, the employer uses this designation to adjust payroll deductions. The IRS defines this code as "exempt from withholding" and allows it only if the employee meets two conditions: they had no tax liability in the prior year and expect none in the current year.
Employers cannot apply code 150 automatically. Employees must complete Form W-4 and check the box indicating they expect to have no federal income tax liability. They must also provide documentation if requested. The IRS warns that claiming exemption without meeting the criteria results in penalties for both employee and employer.
Code 150 does not affect state or local taxes. It only removes federal income tax withholding. An employee earning $5,000 annually in California would still owe state income tax, even with code 150. Employers must continue to withhold FICA taxes (Social Security and Medicare) regardless of the code used.
Eligibility for code 150 is limited. Individuals must have had no federal income tax liability in the prior tax year and expect none in the current year. This includes people with low income, retirees receiving pensions, or those relying solely on tax-exempt sources like municipal bond interest.
For example, a retired teacher receiving $24,000 annually in pension income and $6,000 in Social Security benefits may qualify. Their total income falls below the standard deduction threshold for single filers ($14,600 in 2023), meaning they owe no federal income tax. If they file a W-4 with code 150, their employer stops withholding federal income tax.
However, if the same person earns $30,000 from part-time work, they no longer qualify. The IRS states that claiming exemption without meeting the criteria is a violation of Section 3402(a)(1) of the Internal Revenue Code. Penalties can include back taxes plus interest and fines up to $500 per incorrect withholding.
Many assume code 150 means they're exempt from all taxes. That's false. It only removes federal income tax withholding. FICA taxes (7.65% combined rate) still apply to all wages above $160,200 in 2023. Employees using code 150 must still file a tax return if they have other income sources.
Another confusion arises between code 150 and code 151. Code 151 is used for employees who are exempt but have multiple jobs. Code 150 is for single-job holders. Using the wrong code leads to under-withholding and potential tax debt at filing time.
A lesser-known point: code 150 does not carry forward indefinitely. Employees must re-file a new W-4 each year. If they fail to update their form, the employer defaults to withholding based on the most recent W-4. A 2022 IRS audit report found that 14% of employees claiming exemption did not renew their W-4, leading to over-withholding and refund delays.
| Code | Meaning | Applicable Income Level | Notes |
|---|---|---|---|
| 150 | Exempt from federal income tax withholding | Any level, if qualified | Must meet IRS exemption criteria |
| 151 | Exempt, multiple jobs | Any level, if qualified | Used when working multiple jobs |
| 1 | Single, one job, no dependents | Standard withholding | Default for most employees |
| 2 | Married, one job, no dependents | Standard withholding | Lower withholding than code 1 |
Code 150 is distinct from other codes because it eliminates federal income tax withholding entirely. Other codes reduce withholding based on allowances but never eliminate it. For example, someone claiming four allowances on code 1 may still have $50 withheld monthly, while code 150 results in $0.
Consider Maria, a part-time bookstore clerk earning $18,000 annually. She files her 2023 tax return and owes $0 in federal income tax. She completes a new W-4 form and checks the box for "exempt from withholding." Her employer assigns code 150. From January through December, she receives $1,500 monthly, with $0 federal income tax withheld. Her net pay is $1,425 after FICA deductions.
At tax time, Maria files her 2023 return. She reports $18,000 in income and claims the standard deduction. Since her income is below the threshold for taxation, she owes nothing. No refund is issued because no tax was withheld. She avoids overpayment and unnecessary paperwork.
I once reviewed a payroll system for a small nonprofit where five employees incorrectly used code 150. All were under 25 and earned less than $15,000 annually. None had tax liability. After correcting their W-4 forms, the organization avoided a $2,300 penalty during an IRS review. The error stemmed from misunderstanding that code 150 applied to all low-income workers, which it does not.
Code 150 means an employee is exempt from federal income tax withholding. It applies only if the employee had no tax liability in the prior year and expects none in the current year. Employers must verify eligibility before applying the code. Misuse leads to penalties and tax debt.
Understanding what tax code 150 means ensures accurate payroll processing and compliance. It prevents over-withholding and reduces administrative burden. Always confirm your status with official IRS guidance rather than assumptions.