If you just opened your 2025 W-2 and are staring at Box 14, you likely see a cryptic jumble of letters like "S125," "CAF," or "SDI." Unlike the standardized boxes on the rest of your form, Box 14 is the "Wild West" of the W-2—employers can use it to report almost anything.
However, in 2026, the stakes have changed. Following the passage of the One Big Beautiful Bill (OBBB), the IRS has officially redesigned the W-2 layout for the first time in years. If you are a tipped employee, a business owner, or someone trying to maximize your tax refund, understanding these new codes is no longer optional—it's the difference between a smooth filing and a "Freeze" notice from the IRS.
<!-- ADSENSE_IN_ARTICLE_AD -->
MAY 2026 UPDATE: This guide now includes expanded state SDI/PFL code definitions (CASDI, VPDI, NYPFL, NJ FLI, WA Cares) and a new section for HR teams managing Box 14 entries in ADP, Gusto, and Paychex. The 2026 FSA, HSA, and Dependent Care limits and OBBB codes (14b, TA, TT) are fully incorporated below.
At Summit Health Benefits, we specialize in the tax-saving magic hidden in these boxes. This guide decodes every common code, explains the new Box 14a vs. 14b split, and shows you how these letters translate into real-world cash savings.
Looking for the full Section 125 knowledge hub? Start here: Section 125 Guide.
1. The 2026 W-2 Redesign: 14a vs. 14b
Starting with the 2026 filing season, the IRS has bisected Box 14 to accommodate new federal mandates. You may notice your form now looks slightly different:
Box 14a: The "Other" Bucket
This is the traditional catch-all. If your employer reports Section 125 deductions, Union Dues, or State Disability Insurance, it will live here.
- Key Codes: S125, SEC125, CAF, POP.
- Impact: This is usually where your "tax-shielded" income is highlighted.
Box 14b: Treasury Tipped Occupation Code(s)
New for 2026! If you work in a service-based industry (hospitality, delivery, wellness), your employer must now use Box 14b to report your specific occupation code. This three-digit code is the "key" that unlocks the new No Tax on Tips deduction. For restaurant and hospitality employers, this Box 14b requirement intersects directly with Section 125 plan administration. See our dedicated guide on Section 125 for restaurants and hospitality employers, which covers how the No Tax on Tips provision and pre-tax benefit contributions stack.
Summit Warning: If you are a tipped employee and Box 14b is blank, you may not be able to claim the full OBBB tip deduction on your Schedule 1-A. Check with your payroll department immediately.
2. Decoding the "S125" and "CAF" Mystery
The #1 question we receive at Summit is: "What is S125 on my W-2?" S125 stands for Section 125. It is also frequently labeled as SEC 125, CAF, or CAFE.
Is it a tax?
No. It is the opposite. S125 is a report of your Tax Savings. This number represents the total amount of money you paid for health insurance premiums, dental, vision, or an FSA using pre-tax dollars.
Why it's in Box 14
Employers put this here to help you reconcile your pay stubs. If your gross salary was $70,000, but Box 1 (Taxable Wages) only shows $64,000, the S125 entry in Box 14 explains the $6,000 difference. You "hid" that money from the IRS by spending it on benefits.
- *For a deeper dive into the "invisible" math of this deduction, see our Full 2026 Guide to Section 125 on W-2.
3. The 2026 Box 14 "Cheat Sheet": What Every Code Means
Because the IRS does not provide a universal list for Box 14, payroll software like ADP, Gusto, and Paychex have developed their own shorthand. In 2026, with the inclusion of new state-level disability and family leave acts, your Box 14 might be more crowded than usual.
Common 2026 Labels & Tax Actions
| Label on W-2 | Full Meaning | Tax Action Needed? |
| :--- | :--- | :--- |
| S125 / SEC 125 | Section 125 (Cafeteria Plan) | Informational. (Already subtracted from Box 1) |
| CAF / CAFE | Cafeteria Plan Contributions | Informational. Confirms pre-tax status. |
| SDI / CASDI | State Disability Insurance | Yes. Often deductible on state returns (CA/NY). |
| PFL / NYPFL | Paid Family Leave | Yes. Check state-specific itemization rules. |
| HSA | Health Savings Account | Verify. Must match your Form 8889 totals. |
| FSA / HC-FSA | Health Care Flexible Spending Account | Informational. (Pre-tax shield). |
| UD / UNION | Union Dues | No. Post-tax for most 2026 filers. |
4. State Box 14 Codes: SDI, FLI, CASDI, VPDI, and WA Cares
The federal codes above cover most filers, but millions of W-2s also carry state-mandated insurance codes that confuse employees and payroll teams alike. These codes fund state disability and paid leave programs, and whether they affect your tax return depends entirely on which state you are in.
State-Specific Code Reference
| Code | State | Program | Tax Action Needed? |
| :--- | :--- | :--- | :--- |
| CASDI / CA SDI | California | State Disability Insurance (standard plan) | Yes. Deductible on California return (Schedule CA). |
| VPDI | California | Voluntary Plan Disability Insurance (private plan) | Yes. Same deductibility as CASDI; treated identically. |
| NY SDI | New York | State Disability Insurance | Yes. Deductible on Form IT-196 as a state tax. |
| NYPFL | New York | Paid Family Leave | Yes. Federally taxable wages; deductible on NY state return. |
| NJ FLI | New Jersey | Family Leave Insurance | Informational. Not deductible federally; check NJ-1040. |
| NJ DI / SUI | New Jersey | Disability/Unemployment Insurance | Yes. Deductible on NJ-1040 line 38. |
| WA Cares | Washington | WA Cares Fund (long-term care) | Informational. No federal deduction; no state income tax in WA. |
The California VPDI vs. CASDI Question
If you work for an employer who has a state-approved private disability plan, your Box 14 will show VPDI instead of CASDI. For tax purposes they are identical: both are employee-paid, both appear in Box 14, and both are deductible on your California state return. The distinction only matters to HR teams managing plan administration, not to individual filers.
For employers running multi-state payrolls, these codes need to be set up as separate Box 14 entries per state. Combining New York SDI and California SDI under a single generic "SDI" label is a common setup error that creates filing ambiguity for any employee who works across state lines. For a broader look at how these state contributions interact with your Section 125 plan elections, see our W-2 Section 125 deep dive.
5. Box 12 vs. Box 14: The Error That Triggers IRS Audits
One of the most common reasons for a 2026 tax refund delay is "Double Counting." We see this often at Summit Health Benefits when employees try to manually subtract their Box 14 amounts from their Box 1 wages.
Here is the golden rule: Your employer has already done the math for you.
- Box 1 (Wages): This number is already "Net" of your Section 125 deductions.
- Box 14 (S125): This is just a "memo" field telling you why Box 1 is so low.
Don't Confuse Code DD with Section 125
A major point of confusion in 2026 is Box 12, Code DD.
- Code DD is the total cost of your health insurance (what you paid + what your employer paid).
- Box 14 (S125) is only the part you paid.
If you try to deduct the $15,000 shown in Code DD, the IRS will flag your return for "Excessive Deductions." For a masterclass on how to read these two boxes together without triggering an audit, read our Definitive Guide to Section 125 on W-2.
6. The "One Big Beautiful Bill" (OBBB) and Your 2026 W-2
The 2026 tax year introduces the most radical changes to the W-2 in a generation. If you work in a "Tipped" industry or if your employer has adopted the new "Trump Account" benefit, you will see two brand-new areas on your form.
New: Box 14b (Treasury Tipped Occupation Codes)
If you are a server, bartender, or delivery driver, you can now deduct up to $25,000 in tips from your federal income tax. To claim this, your employer must enter a Treasury Tipped Occupation Code (TTOC) in the new Box 14b.
- The Trap: If Box 14b is blank, the IRS may reject your "No Tax on Tips" claim.
- The Link: Most tipped employees also pay for their health benefits through a Section 125 plan. By combining the "No Tax on Tips" deduction with a Section 125 shield, service workers can often reduce their effective federal tax rate to near 0%.
New: Box 12, Code TA (Trump Accounts)
Starting in mid-2026, employers can contribute up to $2,500 tax-free into a "Trump Account" for an employee's child. These contributions are reported in Box 12 under Code TA.
- Why it matters: Unlike a 401(k) or traditional IRA, these funds are earmarked for the child's future but provided as an employer benefit today.
New: Box 12, Code TT (Qualified Overtime)
If you worked overtime in 2025/2026, you may see Code TT. This represents the "premium" portion of your overtime pay (the "half" in "time-and-a-half"). Under the OBBB, this amount is now deductible from your federal income tax up to $12,500.
7. The 2026 FSA & HSA Contribution Surge
The OBBB didn't just add codes; it boosted limits. If your Box 14 "S125" amount seems higher this year, it might be because you took advantage of the new 2026 thresholds:
- Health FSA: Now $3,400 (up from $3,300).
- Dependent Care FSA: Now a permanent $7,500 per household (up from $5,000).
- HSA (Self-Only): $4,400.
- HSA (Family): $8,750.
FSA vs. HSA: The Eligibility Distinction That Trips Up Filers
Many employees assume they can contribute to both a Health FSA and an HSA in the same year. In most cases, they cannot. The IRS prohibits concurrent enrollment in a standard Health FSA and an HSA because both cover the same "general purpose" medical expenses. The exception is the Limited Purpose FSA (LPFSA), which restricts spending to dental and vision only. If your Box 14 shows both an HSA contribution and a standard Health FSA contribution, verify with your employer that your FSA is the Limited Purpose variety, or you may owe back taxes on the HSA deposits.
For a married couple where both spouses work and each has access to a cafeteria plan, the combined strategy often looks like this: one spouse maximizes the Health FSA ($3,400) and the other maximizes the HSA ($8,750 family). This "split and shield" approach can shelter up to $12,150 from federal income and FICA taxes in a single year.
At Summit Health Benefits, we recommend maximizing these "Box 14 deductions" before the end of the year. Every dollar in Box 14 is a dollar the IRS can't touch. For a deeper look at how cafeteria plan contributions interact with FSA and HSA strategy, see our Section 125 cafeteria plan guide.
8. The Employer Advantage: Why Box 14 is Good for Business
At Summit Health Benefits, we often tell our clients that a well-managed Section 125 plan isn't just a benefit—it's a self-funding revenue tool. When an employee elects to "shield" their income from taxes (as seen in Box 14), the business wins just as much as the individual.
The FICA Match: The 7.65% Factor
For every dollar an employee contributes to a Section 125 plan for health premiums or FSAs, the employer is exempt from paying the matching FICA taxes (6.2% Social Security and 1.45% Medicare).
Let's look at the 2026 Math:
Imagine a small business with 25 employees. If each employee contributes an average of $6,000 annually into a Section 125 plan:
- Total Employee Contributions: $150,000
- Employer Payroll Tax Savings (7.65%): $11,475
This "found money" typically covers the entire cost of plan administration and then some. In the 2026 fiscal climate, where overhead is rising, capturing this 7.65% savings is the difference between a profitable year and a stagnant one. For a full breakdown of how these savings scale across different company sizes and how to present the numbers to ownership, see our FICA tax savings guide for employers.
Technical Insight: These savings also apply to Federal Unemployment Tax (FUTA). By lowering the taxable wage base, you reduce the 0.6% FUTA liability on the first $7,000 of wages for every employee.
9. 2026 Compliance: Avoiding the "Box 14 Audit"
Operating a Section 125 plan is a privilege granted by the IRS, not a right. To keep your deductions tax-free, you must stay within the strict "guardrails" of the tax code. If the IRS determines your plan is non-compliant, they can retroactively declare all Box 14 "S125" deductions as taxable income—a nightmare scenario for HR departments.
The Three Pillars of 2026 Compliance:
- Written Plan Document: You cannot simply "decide" to take pre-tax deductions. You must have a formally adopted written plan document in place before the plan year begins. Retroactive adoption is strictly prohibited.
- Nondiscrimination Testing (NDT): In 2026, the IRS has increased its focus on "Top-Heavy" plans. You must prove annually that your plan does not unfairly favor "Key Employees" (owners or officers making over $235,000 in 2026).
- The Irrevocability Rule: Under Section 125, an employee's choice is a "contract" for the year. Unless they experience a Qualifying Life Event (marriage, birth, loss of other coverage), they cannot change their Box 14 deduction mid-year.
Is Your Plan IRS-Ready?
If you aren't sure if your current payroll setup meets the 2026 NDT standards, our Complete Guide to Section 125 Compliance breaks down the 55% Average Benefits Test and the 25% Key Employee Concentration Test in plain English.
10. HR and Payroll Admin Guide: Setting Up Box 14 Codes Correctly
Most Box 14 errors on W-2s are not employee mistakes. They originate in payroll system configuration. Here is what HR teams and payroll admins need to know before the January W-2 filing deadline.
The Three Most Common Box 14 Setup Errors
1. Labeling pre-tax and post-tax deductions with the same code.
If your payroll platform lumps all health deductions under a generic "HEALTH" label in Box 14, employees cannot tell whether their contribution was pre-tax (Section 125) or post-tax. Use distinct labels: "S125" for cafeteria plan elections and "POST-TAX HEALTH" for any after-tax premiums.
2. Not breaking out state codes by state.
For multi-state employers, each state's SDI or FLI contribution must be reported under the state-specific code, not a shared "SDI" label. ADP, Gusto, and Paychex all support state-specific Box 14 labels in their payroll configuration menus. An employee who splits time between New York and California needs both NYPFL and CASDI reported separately.
3. Omitting Box 14 entirely when Box 1 already reflects the reduction.
While Box 14 is technically optional for Section 125 deductions (the reduction is already baked into Box 1), omitting it creates confusion for employees and weakens your plan's audit trail. Best practice: always report S125 amounts in Box 14 for every participant.
Payroll Platform Quick Reference
- ADP Workforce Now: Navigate to Company Setup > Payroll > Earnings and Deductions > Box 14 Labels. Assign a distinct W-2 Box 14 label to each deduction code.
- Gusto: Box 14 labels are configured under Company Settings > Benefits > Edit Benefit > W-2 Reporting. Labels applied here populate employee W-2s automatically.
- Paychex Flex: Box 14 reporting is managed in the Payroll Module under Tax Settings > W-2 Configuration. Contact your Paychex rep if the Section 125 label is missing from the report.
If your platform is not correctly separating pre-tax health, FSA, and HSA entries in Box 14, contact your TPA (Third Party Administrator) or benefits administrator before December 31. Corrections after W-2s are issued require a W-2c (corrected W-2), which triggers additional IRS scrutiny. Summit Health Benefits clients receive Box 14 labeling guidance as part of standard plan administration.
11. Frequently Asked Questions (2026 Edition)
Why is my Social Security Wage (Box 3) higher than my Wages (Box 1)?
This is a classic Section 125 "fingerprint." While most Section 125 benefits (like health insurance) reduce both income and Social Security taxes, certain items—like 401(k) contributions—only reduce income tax. If you see this discrepancy, your Box 14 codes should explain which deductions were "Income Tax Only."
What happens if my Box 14 is blank?
If you paid for health insurance but your Box 14 is blank, your employer may be taking your premiums "post-tax." This means you are paying 20-30% more for your benefits than necessary. Talk to your HR department about implementing a Summit Health Benefits POP (Premium Only Plan) to fix this.
Does the "No Tax on Tips" (OBBB) affect my Section 125 eligibility?
No. In fact, they work together. You can take the tip deduction in Box 14b and still contribute to an FSA through Box 14a. This "double-dip" is the most effective way for service workers to maximize their 2026 take-home pay.
Can my employer put anything they want in Box 14?
Employers have wide discretion in Box 14. Beyond Section 125 codes, employers commonly report union dues, educational assistance (up to $5,250 tax-free under IRC §127), personal use of a company vehicle, moving expense reimbursements, and voluntary after-tax deductions. There is no IRS-mandated universal list of required Box 14 entries. If a Box 14 entry looks unfamiliar, ask HR for the deduction description before filing.
What is VPDI in Box 14 on a California W-2?
VPDI stands for Voluntary Plan Disability Insurance. California allows employers to substitute an IRS-approved private disability plan in place of the standard state SDI program. For employees, the tax treatment is identical: VPDI contributions are employee-paid, appear in Box 14, and are deductible on your California state return (Schedule CA). Claims go to the private carrier rather than the California EDD, but the W-2 treatment is the same.
Do I need to enter Box 14 codes anywhere on my federal tax return?
No, not on your federal Form 1040. Box 14 entries like S125, CAF, and most employer-defined codes are informational and have already been excluded from Box 1. The exceptions are state disability insurance codes (NY SDI, CASDI, NJ DI), which may be deductible on your state return. When tax software like TurboTax prompts you to categorize Box 14 entries, selecting "Other - not classified" for S125 is correct for federal purposes.
What if my Box 14 shows both S125 and a state SDI code?
Enter both exactly as shown in your tax software. They are separate deductions: S125 confirms your pre-tax benefit contributions (informational for federal purposes), while SDI reflects your state disability insurance payment. Your tax software handles each independently. SDI may generate a state deduction; S125 will not. Do not combine the two amounts or enter them as a single line item.
Why does my S125 amount in Box 14 look different from my pay stub YTD?
Box 14 reflects the full January 1 to December 31 calendar year total. Pay stub YTD figures may run on a different cycle, include a final late-December payroll not captured in your last stub, or exclude certain benefit types reported under a separate code. A gap equal to one paycheck amount ($200 to $600 for most employees) is normal. If the difference is larger than that, ask HR to pull the benefits deduction ledger for the year.
Conclusion: Take Command of Your 2026 Tax Strategy
Box 14 is more than just a list of codes; it's a report card of your financial efficiency. Whether you are an employee decoding an S125 code or an employer looking to capture that 7.65% FICA advantage, understanding these boxes is the key to 2026 tax success.
As the "One Big Beautiful Bill" continues to reshape the American workforce, staying ahead of new codes like 14b and TT is the difference between a standard benefit plan and a high-performance financial strategy.
Ready to see how much your business could save in payroll taxes?
- 👉 Use our 2026 Pre-Tax Savings Calculator
- 👉 Review our W-2 Section 125 Deep Dive
- 👉 Schedule a Compliance Audit with Summit Health
Disclaimer: Summit Health Benefits provides benefits consulting and is not a tax preparation service. Please consult with a CPA or tax professional regarding your specific 2026 W-2 filing.