How to Read Your W-2 Form Box by Box (2026 Guide)

Disclaimer: This article is for educational purposes only and is not tax, legal, or financial advice. Tax rules change periodically, always check current IRS/state guidance or consult a professional.

Your W-2 lands in your mailbox or inbox by January 31, and most of it looks like a wall of numbers. In reality, only a handful of boxes do real work on your return. The rest are reference data or items that only matter in specific situations.

This guide walks every box on the 2026 Form W-2 in plain English, including the new TA, TP, and TT codes added under the One Big Beautiful Bill Act (Public Law 119-21) and the new Box 14a/14b split. By the end, you’ll know which number to type into your tax software, which to verify against your final pay stub, and which to safely ignore.

What a W-2 Actually Is (and the Three Numbers That Matter Most)

Form W-2, Wage and Tax Statement, is the year-end summary your employer files with the Social Security Administration and gives you for tax filing. It’s authorized by 26 U.S.C. §6051. Don’t confuse it with Form W-3, the cover-page transmittal your employer files with the SSA (you will never receive a W-3).

Employers must furnish your W-2 by January 31 (postmarked or made available electronically). If yours is late, ask payroll first. Contact the IRS after February 15 if it still hasn’t arrived.

Three boxes carry most of the weight on your return:

Box 1, federal taxable wages, is what your tax software pulls in as wage income.
Box 2, federal income tax withheld, is the amount you already prepaid. Your refund or balance due is roughly Box 2 minus your final tax liability.
Box 12, with its codes, explains pre-tax deductions, HSA contributions, employer health costs, and (new for 2026) tips and overtime that qualify for federal deductions.

You typically receive multiple copies. Copy B goes with your federal return if you paper-file. Copy 2 goes with your state or local return. Copy C is yours to keep for at least four years.

Lettered Boxes A Through F: The Identity Section

The lettered boxes identify you, your employer, and the specific W-2 form. They don’t change your refund, but errors here cause real problems.

Box a is your Social Security number. If it is wrong by even one digit, your wages may not credit to your SSA earnings record. Ask your employer for a corrected W-2c immediately.
Box b is the employer’s Employer Identification Number (EIN). Tax software uses this to match your W-2 to the copy the IRS already received.
Box c is your employer’s legal name and address.
Box d is the control number, a payroll-system tracking ID. It’s fine to leave blank in tax software if your form doesn’t show one.
Box e and Box f are your name and address. A wrong middle initial is usually harmless. A misspelled last name or wrong SSN is not.

If your name on the W-2 doesn’t match the name on file with the SSA (after a marriage, for example), update the SSA first using Form SS-5, then ask payroll to fix future paychecks.

Boxes 1 Through 11: Wages, Withholding, and FICA

This is the numeric core of the form. Each box has a specific definition, and they rarely match each other.

Box 1: Federal Taxable Wages

Box 1 is almost always lower than your gross salary, by design. Your employer subtracts pre-tax items before reporting Box 1:

Traditional 401(k), 403(b), or 457(b) contributions (shown as Code D, E, or G in Box 12)
HSA contributions made through payroll (Code W)
Section 125 cafeteria plan premiums (health, dental, vision)
Health FSA and dependent care FSA contributions
Pre-tax commuter and parking benefits

If you earn $80,000, contribute $10,000 to a traditional 401(k), pay $3,000 in pre-tax health premiums, and contribute $2,000 to an HSA via payroll, your Box 1 is roughly $65,000.

Box 2: Federal Income Tax Withheld

This is the federal income tax your employer already sent to the IRS on your behalf. It’s driven by your Form W-4 and your earnings. Your refund (or balance due) equals Box 2 minus your final tax liability calculated on Form 1040.

If Box 2 looks too small, that’s a withholding issue, not a math error. Adjust your W-4 going forward.

Box 3 is wages subject to the 6.2% Social Security tax, capped at the annual wage base. For 2026, that cap is $184,500 (up from $176,100 in 2025), per the SSA Cost-of-Living Adjustment Fact Sheet.

Important: traditional 401(k) deferrals do not reduce Box 3, even though they reduce Box 1. Section 125 premiums and HSA payroll contributions do reduce Box 3. That’s why Box 3 is usually higher than Box 1 for anyone with a 401(k).

If you earned more than $184,500, Box 3 will show $184,500 exactly.

Box 4 should equal Box 3 multiplied by 6.2%. The maximum for 2026 is $11,439.00 ($184,500 x 0.062). If your math is off by more than a few cents, check with payroll.

Box 5: Medicare Wages

Box 5 has no cap. It’s usually the truest picture of your total compensation subject to payroll tax. For most workers, Box 5 equals Box 3 plus any 401(k) deferrals (because those reduce Box 1 and Box 3 differently than they reduce Medicare wages).

Box 6: Medicare Tax Withheld

Box 6 is Box 5 multiplied by 1.45%, plus a 0.9% Additional Medicare Tax on wages over $200,000 in a calendar year. Once your year-to-date wages cross $200,000, your employer must withhold the extra 0.9%, regardless of your filing status.

The withholding threshold is fixed at $200,000, but the actual liability thresholds (per IRS Topic 560) depend on filing status: $200,000 single or head of household, $250,000 married filing jointly, $125,000 married filing separately. You reconcile any difference on Form 8959 with your return.

Boxes 7 and 8: Tip Wages

Box 7 shows tips you reported to your employer that were subject to Social Security tax. Box 8 (used mainly by large food and beverage establishments) shows tips your employer allocated to you that you didn’t report.

Box 9: Reserved

Box 9 is shaded on the 2026 form and stays blank. The IRS keeps it reserved for future use.

Box 10: Dependent Care Benefits

Box 10 reports dependent care assistance you received under a Section 129 plan (typically a dependent care FSA). The first $5,000 ($2,500 if married filing separately) is excluded from your taxable wages. Anything above that limit is added back to Box 1.

Box 11: Nonqualified Plan Distributions

Box 11 shows distributions from a nonqualified deferred compensation plan or Section 457 plan. Most workers never see anything here.

Box 12: The Codes That Confuse Everyone

Box 12 has four slots (12a, 12b, 12c, 12d), each holding a two-letter code and a dollar amount. The code tells the IRS what the money is. There are 30+ possible codes, but employees typically see a handful.

Here is a plain-English reference for the codes that matter most for tax year 2026:

D: Traditional 401(k) elective deferrals. Already excluded from Box 1. The 2026 limit is $24,500 ($32,500 with the age-50 catch-up).
DD: Total cost of employer-sponsored health coverage (your share plus the employer share). Informational only under the Affordable Care Act, not taxable.
W: HSA contributions made through payroll (yours plus the employer contribution). The 2026 contribution limits are $4,400 self-only and $8,750 family.
E: 403(b) elective deferrals (typically nonprofits, schools, hospitals).
G: 457(b) deferrals (state and local government employees).
S: SIMPLE IRA contributions.
AA / BB / EE: Roth 401(k), Roth 403(b), and Roth 457(b) contributions. These are not excluded from Box 1, because they are after-tax.
C: Group-term life insurance over $50,000 (imputed income added to Box 1, Box 3, and Box 5).
V: Income from the exercise of a nonqualified stock option.
P: Excludable moving expense reimbursements paid to active-duty members of the Armed Forces.
FF: Qualified Small Employer Health Reimbursement Arrangement (QSEHRA) benefit.

New for 2026 (Public Law 119-21, OBBBA)

Three new Box 12 codes appear for the first time on the 2026 W-2, per IRS 2026 General Instructions for Forms W-2 and W-3:

TA: Employer contributions to a Trump account.
TP: Total cash tips reported to your employer. Supports the new federal tip deduction.
TT: Qualified overtime compensation. Supports the new federal overtime deduction.

If you see TP, expect Box 14b (below) to be filled in too. Tax software released for the 2026 filing season should prompt follow-up questions when these codes appear.

Box 13, Box 14a, and Box 14b: Checkboxes and Other

Box 13 has three checkboxes:

Statutory employee: a specific category (full-time life insurance agents, certain drivers, traveling salespeople). If checked, you report wages on Schedule C, not as W-2 wages.
Retirement plan: indicates you were an active participant in an employer retirement plan during the year. This can phase out or eliminate your traditional IRA deduction.
Third-party sick pay: usually checked when an insurance company (not your employer) issued the W-2 for short-term disability payments.

Box 14a is the traditional Other catch-all. Employers can put almost anything in it, with a short label. Common entries include state disability insurance (SDI/CASDI/NYSDI), state unemployment (SUI), union dues, after-tax health premiums, parking benefits above the pre-tax limit, educational assistance over $5,250, and railroad retirement Tier I/II amounts.

Box 14b is new for 2026: the Treasury Tipped Occupation Code. The IRS uses this three- or four-digit code to confirm a tipped worker qualifies for the new federal tip deduction. Expect Box 14b to be populated whenever Box 12 contains a Code TP entry.

If you can’t tell what a Box 14a entry means, ask payroll. Tax software will sometimes prompt for specific labels (like CA-SDI) that affect state returns or itemized deductions.

Boxes 15 Through 20: State and Local Wages

The bottom row deals with state and local taxes:

Box 15: state abbreviation and the employer’s state ID number.
Box 16: state taxable wages. Often equals Box 1, but several states are different. Pennsylvania, for example, doesn’t exclude 401(k) contributions, so Box 16 (PA) usually matches Box 5 more closely than Box 1. New Jersey and Alabama have their own rules.
Box 17: state income tax withheld.
Box 18: local taxable wages (cities, counties, school districts).
Box 19: local income tax withheld.
Box 20: the locality name (for example, NYC, Detroit, or a school district code in Ohio).

If you worked in more than one state during the year, you should see two rows of 15 through 20 on the same W-2 (or two W-2s, depending on the payroll system). File a state return for each state where you owe tax.

For state-by-state tax rules and rates, see the state paycheck calculators on Pay44.

Reconciling Your W-2 With Your Final Pay Stub

Before you submit your return, spend ten minutes confirming the numbers. The math below uses your final year-end pay stub.

Box 1 check:

YTD gross
  minus pre-tax 401(k) / 403(b) / 457(b) (Code D, E, G)
  minus Section 125 premiums (health, dental, vision)
  minus health FSA and dependent care FSA
  minus HSA payroll contributions (Code W)
  minus pre-tax commuter benefits
  = Box 1

Box 3 check:

YTD gross
  minus Section 125 premiums
  minus HSA payroll contributions
  (do NOT subtract 401(k))
  capped at $184,500
  = Box 3

Box 5 check:

YTD gross
  minus Section 125 premiums
  minus HSA payroll contributions
  (no cap, do NOT subtract 401(k))
  = Box 5

Box 4 check: Box 3 x 0.062. Should match within pennies.

Box 6 check: Box 5 x 0.0145, plus 0.9% on the portion of Box 5 above $200,000.

If anything is off by more than rounding, don’t adjust the numbers in your tax software. Contact payroll and request a Form W-2c, the corrected W-2. The IRS receives the same copy your employer issued, and unilateral changes are a fast path to a CP2000 mismatch notice.

Want a second opinion on what your numbers should look like? Plug your salary, state, pay frequency, and pre-tax deductions into the Pay44 paycheck calculator to model federal, FICA, and state withholding for 2026. The breakdown mirrors the Box 1, Box 3, and Box 5 logic above, so you can compare side by side. If you prefer a mobile workflow, the same calculator is available on iOS and Android via the download page.

Common Problems and Quick Fixes

A few W-2 situations come up every filing season:

Two W-2s from one employer. Mergers, payroll-system changes, or moving between subsidiaries can produce two forms with the same EIN. Add the boxes together unless one explicitly supersedes the other.
Box 1 is $0 with wages in Box 3 and Box 5. Common for clergy and certain ministers under IRC §107. Pastors often report wages on Schedule SE rather than as Box 1 wages.
You received a W-2 and a 1099-NEC. You were treated as both an employee and a contractor. File the W-2 wages on Form 1040 and the 1099 income on Schedule C, with Schedule SE for self-employment tax. The FICA vs. SECA breakdown walks the contractor side in detail.
Lost W-2. Ask payroll for a reissue first. If that hasn’t worked by mid-February, file Form 4852 (Substitute for Form W-2) using your final pay stub.
Multiple jobs, combined Social Security over $11,439. Each employer correctly capped at $184,500 of its own wages. Claim the excess as a credit on Schedule 3 of Form 1040.

For deciding what amount to ask payroll to withhold next year, the W-4 walkthrough with examples covers withholding mechanics in detail.

Frequently Asked Questions

Why is Box 1 on my W-2 lower than my salary?

Because Box 1 is federal taxable wages, not gross pay. Pre-tax 401(k) contributions (Code D), HSA payroll contributions (Code W), Section 125 health/dental/vision premiums, FSA elections, and commuter benefits are all subtracted before Box 1 is printed.

Why is Box 3 higher than Box 1?

Traditional 401(k) deferrals reduce federal taxable wages (Box 1) but do not reduce Social Security wages (Box 3). Most 401(k) savers see Box 3 larger than Box 1 by the amount of their Code D entry, until they hit the $184,500 Social Security wage base for 2026.

$11,439.00, which is 6.2% of the $184,500 Social Security wage base. Anything you earn above $184,500 is not subject to Social Security tax, but it is still subject to 1.45% Medicare tax (with no cap).

What does Code DD in Box 12 mean, and is it taxable?

Code DD is the total cost of your employer-sponsored health coverage, both your share and the employer share. It is reported for transparency under the Affordable Care Act and is not taxable. You do not add it to anything on your return.

What are the new TA, TP, and TT codes on my 2026 W-2?

They were added under the One Big Beautiful Bill Act (Public Law 119-21). Code TA reports employer contributions to a Trump account, Code TP shows cash tips reported to your employer, and Code TT shows qualified overtime compensation. TP and TT support new federal deductions for tips and overtime starting in tax year 2025.

What is the difference between Box 14a and Box 14b on the 2026 W-2?

Box 14a is the traditional Other catch-all (SDI, SUI, union dues, after-tax health, parking, educational assistance, and similar items). Box 14b is new for 2026 and holds the Treasury Tipped Occupation Code, which the IRS uses to confirm a tipped worker qualifies for the new tip deduction.

My W-2 does not match my final pay stub. What should I do?

Run the reconciliation first: YTD gross minus pre-tax 401(k), Section 125 premiums, and HSA payroll contributions should equal Box 1. If it still does not match, contact payroll and request a Form W-2c (corrected W-2). Never just adjust the numbers in your tax software, because the IRS gets the same copy your employer gave you.

Possibly. If your combined Box 3 wages exceeded $184,500 in 2026, each employer correctly withheld up to the cap on its own, but the excess is refundable. Claim it as Excess Social Security tax withheld on Schedule 3 of Form 1040.

References

IRS, 2026 General Instructions for Forms W-2 and W-3 - Official box-by-box instructions, including the new TA, TP, and TT codes and the Box 14a/14b split for 2026.
SSA, 2026 Cost-of-Living Adjustment Fact Sheet - Confirms the $184,500 Social Security wage base and $11,439.00 maximum employee tax.
IRS Topic No. 751, Social Security and Medicare Withholding Rates - Authoritative 6.2% / 1.45% rates and the wage base.
IRS Topic No. 560, Additional Medicare Tax - Filing-status thresholds and the $200,000 employer withholding rule.
PayrollOrg, IRS Releases 2026 Form W-2 With Changes Due to OBBBA - Industry summary of the OBBBA-driven 2026 W-2 changes.
Cornell LII, 26 U.S.C. §6051 - Statutory basis for the W-2 reporting requirement.

Frequently Asked Questions

Why is Box 1 on my W-2 lower than my salary?

Why is Box 3 higher than Box 1?

What is the most I can owe in Social Security tax for 2026?

What does Code DD in Box 12 mean, and is it taxable?

What are the new TA, TP, and TT codes on my 2026 W-2?

What is the difference between Box 14a and Box 14b on the 2026 W-2?

My W-2 does not match my final pay stub. What should I do?

I had two W-2s and Social Security was withheld on both. Did I overpay?

What a W-2 Actually Is (and the Three Numbers That Matter Most)

Lettered Boxes A Through F: The Identity Section

Boxes 1 Through 11: Wages, Withholding, and FICA

Box 1: Federal Taxable Wages

Box 2: Federal Income Tax Withheld

Box 3: Social Security Wages

Box 4: Social Security Tax Withheld

Box 5: Medicare Wages

Box 6: Medicare Tax Withheld

Boxes 7 and 8: Tip Wages

Box 9: Reserved

Box 10: Dependent Care Benefits

Box 11: Nonqualified Plan Distributions

Box 12: The Codes That Confuse Everyone

New for 2026 (Public Law 119-21, OBBBA)

Box 13, Box 14a, and Box 14b: Checkboxes and Other

Boxes 15 Through 20: State and Local Wages

Reconciling Your W-2 With Your Final Pay Stub

Common Problems and Quick Fixes

Frequently Asked Questions

Why is Box 1 on my W-2 lower than my salary?

Why is Box 3 higher than Box 1?

What is the most I can owe in Social Security tax for 2026?

What does Code DD in Box 12 mean, and is it taxable?

What are the new TA, TP, and TT codes on my 2026 W-2?

What is the difference between Box 14a and Box 14b on the 2026 W-2?

My W-2 does not match my final pay stub. What should I do?

I had two W-2s and Social Security was withheld on both. Did I overpay?

References

Frequently Asked Questions