How to Fill Out W-2 Box 14: Labels, Corrections, and Penalties

Box 14 on Form W-2 is where you report payroll items that don’t have a dedicated box elsewhere on the form. To fill out W-2 Box 14 for tax year 2026, you enter each item as a short label followed by a dollar amount, and you use the correct sub-box: Box 14a holds “Other” items like state disability withholdings, union dues, and after-tax health premiums, while Box 14b is reserved for Treasury Tipped Occupation Codes tied to tips reported in Box 12 with the new Code TP.¹ Getting the entries right matters because employees and their tax software rely on these figures to calculate state credits, local taxes, and deduction eligibility.

What Goes in Box 14a

Box 14a is the catch-all. The IRS lets you use it to report anything you want the employee to know about, and the official instructions list these as common examples: state disability insurance taxes withheld, union dues, uniform payments, health insurance premiums deducted with after-tax dollars, nontaxable income, educational assistance payments, and a minister’s parsonage allowance and utilities.¹

Beyond those, employers often report contributions to state paid family leave programs, local income or payroll taxes that lack a dedicated W-2 box, and after-tax retirement plan contributions that don’t belong in Box 12. Voluntary charitable payroll deductions sometimes appear here too, which helps employees who itemize keep cleaner records.

One entry the IRS specifically requires in Box 14a (or on a separate statement) is the annual lease value of a company vehicle when you have included 100% of that value in the employee’s income.¹ This is not optional. The same applies when you choose not to withhold income tax on an employee’s personal use of a highway vehicle: you include the fringe benefit value in Boxes 1, 3, 5, and 14.²

What Does Not Belong in Box 14

Employer-sponsored health coverage is a frequent source of confusion. The total cost of group health plan coverage — employer and employee portions combined — belongs in Box 12 with Code DD under the Affordable Care Act reporting requirement, not in Box 14.³ What does belong in Box 14 is the portion of health insurance premiums the employee paid with after-tax dollars, since those amounts don’t reduce taxable wages in Box 1. Employer HSA contributions also go in Box 12, with Code W, not Box 14.⁴

What Goes in Box 14b

Starting with the 2026 W-2, Box 14b is reserved exclusively for Treasury Tipped Occupation Codes. You use this box only when cash tips are reported in Box 12 with the new Code TP. Enter up to two occupation codes based on the jobs in which the employee received tips. If the employee earned tips in more than two occupations, pick any two of the three or more to report.¹

This structural change means payroll systems need to route data to the correct sub-box. If your software still treats Box 14 as a single field, an occupation code can end up jumbled with your SDI and union dues entries. Confirm with your payroll vendor that the 2026 form layout is in place before generating any W-2s.

Valuing a Company Vehicle Before You Report It

The hardest Box 14 entries are the ones tied to personal use of a company vehicle, because you need a defensible dollar figure before you can report anything. The IRS offers four approaches, and the one you choose locks in for the entire year.

Fair market value. The default method. You determine what the employee would pay a third party to lease the same vehicle on comparable terms. This is a genuine market assessment, not mileage times a rate.
Cents-per-mile rule. Multiply the employee’s personal miles by the IRS standard mileage rate. For 2026, that rate is 72.5 cents per mile.⁵
Commuting rule. Each one-way commute is valued at $1.50. If multiple employees share the vehicle, each one gets the $1.50 charge separately.²
Lease value rule. Use the IRS annual lease value table (Table 3-1 in Publication 15-B) based on the vehicle’s fair market value on the date it first became available for personal use, then multiply by the ratio of personal miles to total miles.

Whichever method you use, the resulting value goes into Boxes 1, 3, and 5 as taxable wages, and you report it again in Box 14 so the employee understands where that income figure came from.²

Educational Assistance Above $5,250

Employer-provided educational assistance is excludable from income up to $5,250 per calendar year.⁶ Any amount above that threshold becomes taxable income and is already included in Box 1. Reporting the taxable excess in Box 14 with a label like “EDUC” gives the employee a clear explanation for why W-2 wages exceed regular salary, and it creates a paper trail if questions come up during an audit about why the assistance wasn’t fully excluded.

Labels and Formatting

Each Box 14a entry needs a short label followed by a dollar amount. The IRS doesn’t mandate specific abbreviations, but widely recognized labels prevent headaches when employees import the W-2 into tax software. Common examples include SDI (state disability insurance), UNION (labor organization dues), and FLI (family leave insurance). Keep labels consistent across every W-2 your organization issues. If one employee’s form says “CA SDI” and another says “CASDI TAX,” you’ll generate unnecessary questions.

Character space is limited. Most payroll platforms cap the number of characters or entries that fit in the box, so abbreviate where you can without making the label cryptic. The test is whether an employee or a tax preparer can look at the entry and immediately understand what category of deduction or income it represents.

When Items Don’t Fit

If you have more items than Box 14 can hold, the IRS allows you to issue a second W-2 for the same employee. On the second form, repeat the employee’s identifying information in Boxes a through f exactly as it appears on the first form, then fill in only the items that didn’t fit.¹ Don’t duplicate the wage and tax amounts from the first form. Just carry over the overflow Box 14 entries. Most modern payroll systems handle this automatically through a supplemental statement or continuation form.

Records to Pull Before You Start

Accurate Box 14 reporting depends on having the right documentation assembled before you begin. At a minimum, gather:

Year-to-date payroll registers, which track every deduction taken during the year and serve as your primary source of truth.
Health insurance billing statements. Isolate the employee-paid portion from the employer-paid portion, and confirm whether deductions were taken pre-tax (under a Section 125 cafeteria plan) or after-tax. Only after-tax amounts belong in Box 14.
Union fee schedules and contracts, to verify the total dues collected for each participating employee.
Tuition assistance records showing the total benefit provided and how much falls above the $5,250 exclusion.
Vehicle mileage logs or lease records for whichever valuation method you’ve chosen.
State and local tax documentation confirming amounts withheld for programs like SDI or paid family leave. These figures should match what you reported on quarterly filings to those agencies.

After-tax deductions deserve extra scrutiny because they don’t reduce Box 1 taxable wages. If you accidentally coded an after-tax health premium deduction as pre-tax, Box 1 will be understated and Box 14 will be wrong. That mismatch is painful to unwind after forms are filed.

Fixing a Box 14 Mistake After Filing

If you discover an error in Box 14 after the W-2 is out, correct it by issuing Form W-2c. Enter the correct tax year in Box c, repeat the employee’s identifying information, and fill in only the fields that need correcting. Don’t redo the entire form.⁷ For Box 14a corrections, enter the corrected label and amount in the “Correct information” column. If the employee’s name or Social Security number was also wrong on the original, check the appropriate box and provide both the previously reported and the corrected information.

Speed matters because the penalty for an incorrect return decreases the sooner you fix it. A correction filed within 30 days of the original deadline drops the per-form penalty to $60. Wait until after August 1, and it climbs to $340 per form.

Penalties That Make Accuracy Worth It

The IRS imposes penalties on a sliding scale based on how late the correct information arrives. For returns due in 2026, the per-form amounts are:

Corrected within 30 days of the deadline: $60 per form.
Corrected after 30 days but by August 1: $130 per form.
Filed after August 1 or not filed at all: $340 per form.
Intentional disregard: $680 per form with no annual cap.

⁸

Annual caps limit total exposure at each tier, but for an employer with hundreds of employees those caps still add up fast. The cost of getting Box 14 right the first time is almost always less than the cost of fixing it later.

1
Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3
2
Internal Revenue Service. 2026 Publication 15-B – Employers Tax Guide to Fringe Benefits
3
Internal Revenue Service. Form W-2 Reporting of Employer-Sponsored Health Coverage
4
Internal Revenue Service. Instructions for Form 8889
5
Internal Revenue Service. 2026 Standard Mileage Rates
6
Office of the Law Revision Counsel. 26 USC 127 – Educational Assistance Programs
7
Internal Revenue Service. Form W-2c (Rev. January 2026) – Corrected Wage and Tax Statement
8
Internal Revenue Service. Information Return Penalties