401(k) on a pay stub commonly refers to Pre-tax retirement contribution. The label should always be read in context because payroll abbreviations are not governed by one universal dictionary.
The parent glossary describes 401(k) as Pre-tax retirement contribution. That is a useful starting point, not a universal payroll definition: employers can reuse the same code for a different purpose.
What does 401(k) mean on a pay stub?
This is best classified as retirement-plan information. Check the heading above the entry, the sign of the amount and whether it appears under employee deductions, employer contributions, earnings or memo information.
A current-period amount shows what happened on this statement. A year-to-date amount is a running total and should not be subtracted again when checking net pay.
Where 401(k) normally appears
The entry may be shown under employee deductions, employer contributions or both. The statement should make clear whether the amount came from your pay, was contributed by the employer, or is only an informational year-to-date figure.
How to check the 401(k) amount
Check the percentage or fixed amount in your latest plan election and apply it to the plan’s definition of eligible compensation. Bonuses, overtime and some allowances may be included or excluded depending on the plan document.
- Confirm the pay-period start and end dates.
- Identify whether the amount adds to gross pay, reduces net pay or is informational only.
- Compare it with the previous statement and the relevant election, time record or payroll notice.
- Reconcile gross pay, taxes, deductions and net pay without counting year-to-date totals as current deductions.
Is 401(k) taxable?
Traditional, Roth and employer retirement contributions do not all receive the same income-tax treatment. Social Security and Medicare treatment can also differ from federal income-tax treatment. Use the plan description and W-2 coding to identify the actual arrangement.
For current rules, consult the relevant official guidance. PaperlessPay.net provides general information and cannot determine the treatment of a specific employee’s payroll.
Questions to ask payroll
- What is the full description assigned to 401(k) in this payroll system?
- Is it employee-paid, employer-paid or displayed for information only?
- Is it pre-tax or post-tax, and which taxable-wage boxes does it affect?
- What dates, hours, rate, election or legal order produced the amount?
- Is the entry recurring, retroactive, a correction or a one-off adjustment?
What to do if 401(k) looks wrong
Keep the statement and supporting records, but redact Social Security numbers, bank details and other sensitive information before sharing anything. Contact the employer’s payroll or HR team through a verified internal channel and request the code description and calculation in writing.
Do not enter payroll credentials into a third-party site. PaperlessPay.net is an independent information site and cannot access, change or recover an employee payroll account.