Yes, your 401(k) contribution does show on your pay stub. It appears as a line item in the deductions section of each check, usually grouped with other pre-tax deductions, and it shows both the amount withheld for the current pay period and a running year-to-date total. The exact label varies by payroll system, but the information is there on every stub once your enrollment is active.
Where the 401(k) Line Item Appears
Look in the section labeled “before-tax deductions” or “pre-tax deductions.” Payroll systems abbreviate the line in different ways. Common labels include 401K, RET, DEF COMP, and PRE-TAX 401K. The line sits alongside other voluntary deductions such as health insurance premiums and flexible spending account contributions, and it is kept separate from involuntary withholdings like federal income tax.
Most stubs display two columns next to the label: the amount taken out this pay period and the year-to-date total. The year-to-date figure is the number to watch. It lets you track how close you are to the annual contribution limit without any extra arithmetic. If you elected to contribute a percentage of pay rather than a flat dollar amount, multiply your gross earnings for the period by that percentage; the result should equal the current-period deduction on the stub.
Traditional and Roth Contributions Look Different
A traditional 401(k) contribution is taken from your gross pay before federal income tax is calculated, so it lowers your federal taxable wages for the period. A Roth 401(k) contribution is made with after-tax dollars, and your employer includes the amount in your taxable income when you earn it.1Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts
On the stub itself, Roth contributions are labeled separately, often as ROTH 401K or 401K ROTH, and may appear under after-tax deductions rather than pre-tax deductions. Because Roth deferrals are included in taxable wages, your federal income tax withholding for the period will be higher than it would be for the same dollar amount contributed on a pre-tax basis. Employers are required to track and report Roth contributions separately at year-end.1Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts
Employer Match Shows Up Somewhere Else
Money your employer adds on your behalf is not a deduction from your check, so it does not appear on the same line as your own contribution. The match usually sits in a different area of the stub labeled “employer-paid benefits,” “company contributions,” or “memo items.” It does not reduce your take-home pay because it never came out of your paycheck to begin with.
The match line is there for transparency: it confirms your employer is contributing the amount promised under the plan and shows the full value of your compensation. Some employers use a third-party administrator that records the match on an external retirement portal rather than the pay stub. Your own deduction should still appear on the stub in that case, but the match may only be visible when you log into your retirement account.
401(k) Loan Repayments Appear Separately
If you have borrowed from your 401(k), the loan repayments also appear on your stub, but in a different place. Loan repayments are made with after-tax dollars, so they show as a post-tax deduction and are usually labeled something like 401K LOAN or 401K LOAN PMT. They do not reduce your federal taxable wages.
Do not confuse a loan repayment with a new contribution. Repayments return principal and interest to your account, but they do not count toward the annual elective deferral limit. If your stub shows both a pre-tax 401(k) deduction and a post-tax loan repayment, only the pre-tax line is a new retirement contribution.
How the Deduction Changes the Rest of the Stub
A traditional 401(k) deferral lowers your federal taxable income for the period. If your gross pay is $3,000 and you defer $300, the federal taxable wages reported on the stub drop to $2,700. You will see this as a gap between “gross pay” and “federal taxable wages,” and it produces lower federal income tax withholding on that check.2Internal Revenue Service. 401(k) Plan Overview
Social Security and Medicare taxes are a different story. Traditional 401(k) deferrals do not reduce your FICA wages. Your full gross pay, including the deferred amount, is still subject to the 6.2% Social Security tax and the 1.45% Medicare tax.3Internal Revenue Service. Topic No. 424, 401(k) Plans You can confirm this on the stub itself: the “Social Security wages” and “Medicare wages” lines will be higher than your federal taxable wages if you are making pre-tax 401(k) contributions.
Other pre-tax deductions on the same stub can also lower your federal taxable wages. Health insurance premiums paid through a cafeteria plan and flexible spending account contributions come out before income tax is calculated too, and unlike 401(k) deferrals, those cafeteria plan deductions typically reduce Social Security and Medicare wages as well. If several pre-tax items appear on your stub, adding them up separately shows how much of your tax savings comes from retirement versus other benefits.
Using the Year-to-Date Column
The year-to-date figure next to your 401(k) deduction is the simplest way to keep an eye on the annual limit. For 2026, the standard cap on elective deferrals is $24,500, and that cap applies to your own pre-tax and Roth contributions combined. It does not include the employer match. If you are 50 or older, catch-up rules raise your personal limit, and a higher catch-up tier applies at ages 60 through 63.4Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 The year-to-date column on your last stub of the year should not exceed the limit that applies to your age group.
If you changed jobs during the year, each employer’s payroll system tracks only its own plan. Comparing the year-to-date totals from both employers’ pay stubs is the easiest way to catch an over-contribution early, before it becomes a filing-season problem.
When You Do Not See a 401(k) Line
A few situations can explain a missing deduction:
- You have not met the plan’s eligibility requirements. Federal law lets an employer require up to one year of service and a minimum age of 21 before you can make elective deferrals. The plan’s summary plan description spells out the waiting period.5Internal Revenue Service. 401(k) Plan Qualification Requirements
- You were automatically enrolled. Plans established after December 29, 2022 generally must auto-enroll new employees at a starting deferral rate of at least 3%. An unexpected deduction is often this. You can opt out or adjust the rate.
- A recent change has not processed yet. Updating your contribution percentage can take one or two payroll cycles to appear.
- Your employer records the match on an outside portal, and only your own deduction appears on the stub.
If none of these apply and you still expect to see a contribution, contact HR or payroll. A missing deduction can mean your enrollment was not processed, which delays both your savings and any employer match you would otherwise earn.
Matching the Final Stub to Your W-2
The year-to-date 401(k) figure on your final stub of the year should match Box 12 of your W-2, under Code D for traditional pre-tax deferrals or Code AA for Roth deferrals.6Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3 If the two numbers do not agree, raise it with payroll before you file your return.
The same cross-check confirms the tax treatment. Box 1 (wages, tips, other compensation) should not include your traditional pre-tax deferrals, which is why Box 1 is typically lower than your total gross pay. Box 3 (Social Security wages) and Box 5 (Medicare wages) will include those deferrals, confirming that FICA was calculated on your full earnings.6Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3