W-2 Does Not Match Your Last Pay Stub? Box 1 Explained

When a W-2 does not match your last pay stub, the usual reason is pre-tax deductions: Box 1 of Form W-2 reports federal taxable wages, which is gross pay minus the pre-tax amounts, while the last pay stub of the year still shows full year-to-date gross pay. A lower Box 1 is normal, not an error.

The other boxes follow rules of their own. Social Security wages in Box 3 stop at the annual wage base, Medicare wages in Box 5 have no cap, and a traditional 401(k) deferral lowers Box 1 but not Boxes 3 and 5. This guide explains each difference, maps pay stub lines to W-2 boxes, and gives the steps to reconcile the two documents before you file.

Why your W-2 does not match your last pay stub

One of the most frequent questions workers ask during tax season is why total gross earnings on their final December pay stub exceed the figure printed in Box 1 of Form W-2. The discrepancy stems from federal tax definitions governing gross income versus taxable compensation.

Gross pay represents total earnings before any deductions, including regular salary, hourly wages, overtime premiums, bonuses, commissions, and tips. Box 1 on Form W-2 reports federal taxable wages, which represents gross pay minus qualified pre-tax exclusions. When an employee elects pre-tax payroll deductions, those funds bypass federal income tax withholding at the time of payment.

For example, if an employee earns $60,000 in gross pay during a calendar year and contributes $4,000 to a traditional 401(k) account alongside $2,000 for medical insurance premiums, their Box 1 taxable compensation drops to $54,000. The final pay stub continues to report $60,000 as year-to-date gross pay, but Form W-2 accurately reports $54,000 in Box 1 because the $6,000 in pre-tax deductions was exempt from federal income tax withholding. Boxes 3 and 5 would show $58,000 in this example, because the $4,000 401(k) deferral is still subject to Social Security and Medicare tax while the Section 125 medical premiums are not.

Social Security wages in Box 3 may also differ from gross pay due to statutory annual limits set by the Social Security Administration. Once an employee's cumulative earnings cross the annual Social Security wage base cap ($184,500 for 2026, according to the Social Security Administration), employers stop withholding the 6.2% Social Security tax. As a result, Box 3 will cap out at the maximum threshold even if total paystub gross pay is substantially higher.

Medicare taxes in Box 5 carry no wage limit cap. Every dollar of Medicare wages remains subject to the 1.45% Medicare tax, and employers must also withhold an Additional Medicare Tax of 0.9% on wages they pay an employee in excess of $200,000 in a calendar year, as outlined in IRS Publication 15. Box 6 includes any Additional Medicare Tax withheld.

Line-by-Line Mapping: Connecting Pay Stub Lines to W-2 Boxes

Reconciling a final pay stub against Form W-2 requires mapping current line items to standardized tax boxes. Because payroll withholding calculations adjust gross income for statutory exemptions, numbers printed on a pay stub do not always match W-2 boxes directly.

Pre-tax employee contributions—such as traditional 401(k) retirement plans, health insurance premiums under Section 125 flexible benefit plans, and Health Savings Accounts (HSAs)—reduce federal taxable income. Consequently, Box 1 taxable wages on Form W-2 are typically lower than cumulative gross pay shown on an end-of-year pay stub.

The following table illustrates how standard line items from a year-end pay stub map directly to specific boxes on IRS Form W-2:

When evaluating this mapping grid, observe that pre-tax benefit deductions do not all behave the same way. Health insurance premiums paid through a Section 125 cafeteria plan reduce taxable amounts across Box 1, Box 3, and Box 5, while traditional 401(k) contributions reduce Box 1 income but remain subject to Social Security and Medicare taxes, so they stay in Box 3 and Box 5. Box 12 Code DD is informational only and is not taxable income.

How to Reconcile Your Final December Pay Stub with Your W-2

Reconciling your final pay statement of the year against Form W-2 ensures that payroll reporting errors are caught before submitting tax filings to the IRS. Running a simple end-of-year audit protects against tax filing delays or unexpected tax liabilities.

Follow these steps to conduct an accurate end-of-year review:

1. Confirm the Pay Date Scope: Ensure your final pay stub reflects a pay date within the calendar year ending December 31. If work was performed in late December but the pay date fell on January 2 of the new year, those earnings belong on the following year's W-2.
2. Audit Federal Tax Withholdings: Match year-to-date federal income tax withheld on your final pay stub against Box 2 of Form W-2. These two numbers should be identical down to the cent.
3. Calculate Taxable Wage Subtractions: Subtract pre-tax health insurance premiums, HSA contributions, and 401(k) retirement contributions from your final YTD gross pay. Verify that the resulting figure matches Box 1 wages on Form W-2.
4. Verify FICA Tax Calculations: Confirm that Box 4 Social Security tax equals 6.2% of Box 3 wages (up to the annual cap), and Box 6 Medicare tax equals 1.45% of Box 5 wages (plus 0.9% Additional Medicare Tax on any wages over $200,000).
5. Review State and Local Lines: Compare state tax withholdings on your pay stub against Box 17, and local tax withholdings against Box 19.

If you discover an unexplainable variance during reconciliation, review detailed guides on how to reconcile YTD discrepancies before contacting your employer's payroll department to request a corrected tax statement.

Related: Contractor Year-End Records: Invoices, Payment Summaries and 1099-NEC

Illustrative Pay Period Calculation and Annual Reconciliation

To see how individual pay periods aggregate into annual totals, consider a worked example calculated under standard federal tax rules.

Illustrative example 1: a single filer in Texas on a $52,000.00 annual salary, paid every two weeks, with no pre-tax deductions, one pay period computed with PayStubGo's paystub calculator for the 2026 tax year (an illustration, not tax advice).

In this single biweekly pay period, the employee earns $2,000.00 in gross compensation. Federal income tax withholding equals $156.15 based on single filing status rules, Social Security tax equals exactly 6.2% ($124.00), and Medicare tax equals 1.45% ($29.00). Because Texas imposes no personal state income tax, state withholding stays at $0.00, yielding net take-home pay of $1,690.85.

When this employee works a full 26 biweekly pay periods throughout the calendar year without pay changes or pre-tax adjustments, the cumulative paystub totals build linearly toward annual Form W-2 figures.

Illustrative example 2 (full-year reconciliation): the annual aggregation of 26 identical biweekly pay periods for the same Texas employee during the 2026 tax year (an illustration, not tax advice).

Because this employee elected zero pre-tax benefit deductions, total paystub gross pay ($52,000.00) matches Box 1, Box 3, and Box 5 wages exactly on Form W-2. Multiplying single-period withholdings by 26 yields $4,059.90 for Box 2, $3,224.00 for Box 4, and $754.00 for Box 6. Net take-home pay totaling $43,962.10 appears across the 26 individual pay stubs, but net pay never appears on Form W-2 because tax agencies evaluate gross taxable wages rather than net cash receipts.

Special Scenarios: Changing Jobs, Multiple Employers, and Midyear Moves

Certain employment events introduce additional complexity when comparing pay stubs to annual W-2 forms.

When an employee changes employers midyear, each employer maintains separate payroll records. The new employer's payroll system starts year-to-date accumulators at zero. At year-end, the employee receives two separate Form W-2 statements. Neither employer's final pay stub will reflect full-year income; the taxpayer must combine the figures from both W-2 forms when filing their tax return.

Working for multiple employers in a single year can lead to excess Social Security tax withholding. Because each employer independently withholds 6.2% Social Security tax up to the annual wage cap, an employee earning $100,000 at each of two separate jobs ($200,000 total) will have Social Security tax withheld on the full amount, even though 2026 wages above $184,500 are not subject to the tax. The excess withholding is claimed as a credit on the tax return (Schedule 3, Form 1040), as explained in IRS Topic 608. If a single employer over-withholds, the employer, not the tax return, must correct it.

Relocating to another state partway through the year adds state-level wage allocation complexities. Pay stubs issued after the move date should reflect the new work state's tax withholdings. At year-end, the employer provides a W-2 listing multiple state entries in Box 15 through Box 17, splitting taxable wages based on earnings in each jurisdiction.

When to Use a Pay Stub vs When You Need a W-2

Knowing when to present a pay stub versus Form W-2 prevents administrative delays when applying for financing, housing, or government benefits.

Lenders and verification agents require different documentation depending on what they are verifying:

1. Mortgage Applications and Home Loans: Mortgage underwriters commonly request both documents. They often ask for W-2 forms covering the last two calendar years to review employment stability and wage consistency, alongside recent pay stubs (frequently covering about the most recent 30 days) to confirm current earnings. Exact requirements vary by lender and loan program.
2. Apartment Rentals and Lease Agreements: Property management companies and private landlords evaluate recent pay stubs to confirm active employment and current cash flow. They analyze net take-home pay relative to monthly rent requirements. While landlords may review past W-2s, recent pay statements offer immediate proof of ongoing income.
3. Annual Income Tax Filing: Taxpayers rely on Form W-2 when completing federal and state tax returns. If a Form W-2 has not arrived by early February, the IRS says to contact your employer first; if it still has not arrived by the end of February, you can call the IRS. If the form does not arrive in time to file, you may complete your return using IRS Form 4852 (Substitute for Form W-2), estimating wages and withholding from your final pay stub (IRS Topic 154).
4. Auto Loans and Personal Credit: Car dealerships and personal loan providers usually prioritize recent pay stubs because they reflect active employment and current gross pay rates.
5. Disability and Unemployment Claims: State agencies evaluating short-term disability or unemployment benefits may ask for recent pay stubs to confirm earnings in the weeks before a claim.

Using modern online pay stub creation tools helps employers format clean, readable pay statements that record the wages actually paid each period for routine recordkeeping.

Related: Pay Stubs When You Are Self-Employed: What Lenders and Landlords Actually Ask For

Pay stub and W-2: what each document is

For the two documents side by side, see W-2 vs pay stub. The fundamental difference between a pay stub and Form W-2 lies in timing, reporting scope, and legal authority. A pay stub accompanies each paycheck issued by an employer, whether weekly, biweekly, semimonthly, or monthly. It breaks down current earnings, itemized payroll deductions, net take-home pay, and cumulative year-to-date earnings totals. In contrast, Form W-2 (officially named the Wage and Tax Statement) is an annual tax form provided once per calendar year by January 31 under federal payroll guidelines.

Employers generate pay stubs for ongoing transparency so workers can verify that hourly rates, regular hours, overtime, and benefit withholdings match their employment terms. Form W-2 summarizes the entire calendar year's compensation into standard tax boxes defined by federal authorities. Employers file Copy A of Form W-2 with the Social Security Administration (SSA), which shares the wage data with the Internal Revenue Service (IRS), and state tax agencies receive state copies where required, so individual tax filings can be matched against employer reports.

Frequency also alters how information appears on each document. A single pay stub reflects a narrow window of work, usually covering one to two weeks of labor. Form W-2 reflects all wage payments made between January 1 and December 31, regardless of when the underlying work hours were performed. Because federal payroll accounting relies strictly on payment date rather than work period dates, pay stub totals run concurrently with annual W-2 reporting.

Another key distinction is document structure. Pay stubs vary in layout depending on employer preference or software configuration, although essential fields remain consistent across modern payroll systems. Form W-2 follows an exact standardized government grid, and several of its boxes (such as Box 1 wages and Box 2 federal withholding) feed directly into lines on Form 1040.

Maintaining Accurate Pay Records for Personal Finance

Both pay stubs and Form W-2 play vital roles in personal recordkeeping. Employees should review each pay stub upon receipt to ensure hours, pay rates, and deduction elections remain accurate. Employers should select structured, customizable pay stub templates to provide clear statements to staff.

Establishing routine habits for reading individual pay stubs helps catch payroll errors early when they are easiest to correct. Store physical copies securely or maintain digital PDF copies in protected, encrypted folders.

It helps to follow established payroll record retention periods. Employees should keep individual pay stubs until they receive and reconcile their annual Form W-2. Once Form W-2 is verified, routine pay stubs may be archived or discarded, but taxpayers should retain Form W-2 statements along with filed tax returns for at least three years, and longer in some situations (six years if income was underreported by more than 25%, seven years for bad-debt or worthless-securities claims), according to the IRS record retention guidance.

PayStubGo provides an online tool that formats user-supplied pay information into clean PDF statements for personal recordkeeping. PayStubGo is not a payroll processing service, does not file tax forms directly with government agencies, and does not offer formal legal or tax advice.