Employer matching and non-elective 401(k) contributions are not reported on your W-2. They don’t appear in your wages, they don’t appear in Box 12, and they don’t appear in your Social Security or Medicare wages either. The form tracks what you earned and what you deferred from your own paycheck. What your employer put in on top of that is absent by design.
The reason is straightforward. Your W-2 exists to report compensation that is either taxable to you in the current year or has to be measured against a personal contribution limit. Traditional employer contributions fail both tests: they aren’t taxable to you when made, and they don’t count toward your elective deferral limit. So the IRS doesn’t require them on the form, and payroll doesn’t put them there.
What the W-2 Does Show for Your 401(k)
Four places on the W-2 carry 401(k) information, and all four are about you rather than your employer.
Box 1 reports your federal taxable wages. Traditional pre-tax deferrals reduce this figure because you haven’t been taxed on that money yet. Roth 401(k) deferrals do not reduce Box 1, since you elected to pay tax on them now.
Boxes 3 and 5 report Social Security and Medicare wages. Neither traditional nor Roth deferrals reduce these numbers. Employee 401(k) contributions remain fully subject to payroll tax, which is why Box 3 and Box 5 usually run higher than Box 1 for anyone contributing pre-tax.1Internal Revenue Service. Retirement Plan FAQs Regarding Contributions
Box 12 is where the IRS monitors your elective deferrals against the annual limit. Two codes matter for 401(k) plans:
- Code D: traditional pre-tax elective deferrals. This amount has already been subtracted from Box 1.
- Code AA: designated Roth contributions to a 401(k). This amount is included in Box 1 because Roth deferrals are made with after-tax dollars.
The combined total of Code D and Code AA cannot exceed $24,500 for 2026. Workers 50 and older can defer an additional $8,000 as catch-up, and workers aged 60 through 63 can defer up to $11,250 under a SECURE 2.0 provision.2Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
Box 13 has a checkbox labeled “Retirement Plan.” Your employer marks it if you were an active participant in a qualified plan during the year. More on that below, because it’s often mistaken for a signal about employer contributions when it isn’t.
Employer contributions are absent from every one of these boxes. They aren’t in Box 1 because they aren’t taxable to you yet. They aren’t in Box 3 or Box 5 because employer contributions to qualified plans are exempt from Social Security and Medicare taxes. And they aren’t in Box 12 because that field is reserved for your deferrals.1Internal Revenue Service. Retirement Plan FAQs Regarding Contributions
Where to Find Your Employer’s Contributions
Because the W-2 is silent, you need other records to see what your employer actually put in. The most direct source is your quarterly or annual statement from the plan administrator or recordkeeper. Most plans now offer online portals that break out employee deferrals, employer match, and any non-elective contributions separately, along with earnings on each bucket.
Pay stubs are the next best source. Many payroll systems show the employer contribution as its own line, either per pay period or year-to-date. If neither is available, you can request a detailed transaction history from your plan administrator.
For a plan-wide view, your employer files an annual Form 5500 with the Department of Labor that contains aggregate contribution data. You have the right to request a summary of that filing.
The Total Contribution Limit the W-2 Hides
Box 12 lets the IRS confirm you stayed within your personal deferral limit. But there’s a larger, separate ceiling that applies to everything going into your account combined — your deferrals plus the employer match plus any non-elective employer contribution. For 2026, that combined limit under Section 415(c) is $72,000, with catch-up contributions on top.3Internal Revenue Service. COLA Increases for Dollar Limitations on Benefits and Contributions
Your W-2 gives you no visibility into this total. To confirm you’re not bumping against the ceiling, check plan statements directly. This matters most for people receiving generous profit-sharing contributions, or for owner-employees whose deferrals and employer contributions can both be substantial.
The One Exception: Roth Employer Contributions
SECURE 2.0 opened a narrow exception to the rule that employer contributions never appear on a tax form. Since late 2022, employers can offer participants the option to designate matching and non-elective contributions as Roth. If you elect that treatment, those contributions become taxable to you in the year they’re made.
Even then, they don’t show up on your W-2. Designated Roth employer contributions are reported on Form 1099-R, in boxes 1 and 2a, with code G in box 7.4Internal Revenue Service. SECURE 2.0 Act Impacts How Businesses Complete Forms W-2 So if you’ve opted in, watch for a 1099-R from your plan alongside your W-2. Those Roth employer contributions remain exempt from Social Security and Medicare withholding even though they’re taxable for income tax purposes.
What the Retirement Plan Checkbox Actually Means
Box 13’s “Retirement Plan” box gets confused with employer contribution reporting because it’s the one place employer plan participation shows up on the form. But the checkbox reports a yes-or-no fact, not a dollar amount. It’s marked if you were an active participant at any point in the year, which can be triggered by receiving an employer contribution, having one allocated to your account, or simply being eligible to defer even if you didn’t.5Internal Revenue Service. Common Errors on Form W-2 Codes for Retirement Plans
The reason the box matters isn’t the 401(k) itself. It’s your traditional IRA deduction. When the box is checked, income-based phase-outs kick in that can limit or eliminate your ability to deduct a traditional IRA contribution. Single filers covered by a workplace plan hit the phase-out between $81,000 and $91,000 of modified adjusted gross income for 2026; married joint filers with the contributing spouse covered phase out between $129,000 and $149,000.2Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 If neither you nor your spouse has the box checked, income doesn’t restrict the deduction.6Internal Revenue Service. IRA Deduction Limits
The short version: the checkbox flags participation, not contributions. If you want to know what your employer put in, you still have to look outside the W-2.