Health insurance premiums paid by your employer show up in Box 12 with code DD—nowhere else on the form.
What's Box 12b D on a W-2?
Code D in Box 12 tracks your 401(k), 401(k) SIMPLE, or Roth 401(k) contributions that shrink your taxable wages before income tax kicks in.
Come 2026, the IRS IRS still uses code D for salary-reduction contributions under a Section 401(k) arrangement. These deferrals also appear on your 1040 Schedule 3, line 4 if you're hunting for the Saver’s Credit.
Does Box 3 on a W-2 include health insurance?
Yep—Box 3 (Social Security wages) and Box 5 (Medicare wages) already factor in pretax health-insurance premiums taken from your paycheck.
That’s because pretax health premiums drop your gross pay before Social Security and Medicare taxes are calculated. The IRS Publication 15 spells this out: pretax deductions for employer-sponsored health coverage land in Boxes 3 and 5.
What do codes D and DD mean on my W-2?
Code D is your 401(k) deferral; code DD is the total cost of your employer’s health coverage—both are for your eyes only.
Neither code changes your taxable wages; they just show how much you and your employer shelled out for retirement and health perks. The IRS W-2 Instructions spell out what these codes mean.
Are insurance premiums listed on a W-2?
Your employer reports the cost of coverage in Box 12, code DD, on every W-2 you get in 2026.
The number in Box 12-DD is purely informational—it doesn’t touch your taxable wages or withholdings. Employers must send this figure to the IRS each year on Form W-2.
Can I deduct health insurance premiums from my W-2?
Nope—you can’t claim employer-sponsored health-insurance premiums again on your federal return because they’re paid with pretax dollars.
The premiums you pay through payroll already lower your taxable income before any tax is figured. Try deducting them twice, and the IRS Publication 502 will shut that down fast.
What do codes D and DD in Box 12 mean?
Code DD tells you how much your employer spent on health coverage; code D shows your 401(k) salary deferral—both are just for reference.
You don’t need to do anything with these codes when you file. Just punch the numbers exactly as they appear on your W-2 into your tax software or paper return.
Are health insurance premiums included in Box 1 of a W-2?
No—Box 1 (wages subject to federal income tax) leaves out pretax health-insurance premiums.
If your employer offers a Section 125 cafeteria plan, your health premiums are yanked out before Box 1 is calculated, so your W-2, Box 1 will look smaller than your gross paycheck.
Why do Box 1 and Box 16 look different?
Boxes 1 and 16 don’t match when your state taxes 401(k) deferrals but the feds don’t.
Take New York and Pennsylvania, for example—they tax 401(k) deferrals at the state level, so Box 16 can outpace Box 1. The IRS W-2 Instructions list each state’s quirks.
What’s the difference between Box 1 and Box 3 on my W-2?
Box 1 (federal wages) and Box 3 (Social Security wages) split when deductions only trim federal taxable wages, like premiums from a cafeteria plan.
Box 3 captures every dollar hit by the 6.2% Social Security tax, while Box 1 wipes out any pretax health-insurance premiums that don’t owe federal income tax.
How do I deduct health insurance premiums from my paycheck?
You don’t “deduct” them a second time—they’re already taken out pretax, so there’s nothing extra to subtract.
If you want a deduction at tax time, you’ll need to itemize on Schedule A, and the premiums must clear 7.5% of your adjusted gross income under current IRS rules. You may also want to check if your state offers additional deductions, such as in Illinois.
What does code C in Box 12 mean on a W-2?
Code C shows the taxable slice of employer-provided group-term life insurance over $50,000 that’s lumped into Boxes 1, 3, and 5.
The IRS Publication 15-B says the first $50,000 of coverage is tax-free; anything above that lands in Box 12-C and gets taxed.
Can I use insurance premiums as a tax deduction?
You can claim health-insurance premiums as an itemized deduction on Schedule A if they clear 7.5% of your adjusted gross income.
This deduction covers premiums for medical, dental, and long-term-care policies. Hold onto receipts—the IRS IRS may ask for proof.
Are health insurance premiums taken from payroll pretax or post-tax?
Health-insurance premiums are taken pretax in 2026 unless you deliberately choose after-tax payroll deductions.
Pretax deductions shrink your taxable wages for federal, Social Security, Medicare, and most state income taxes, trimming your overall tax bill. If you're curious about how this compares to other benefits, you might explore whether health insurance covers Silver Sneakers.
Are health insurance premiums tax-deductible in Canada?
Private health-plan premiums are deductible as medical expenses if at least 90% of the premiums cover eligible services.
Provincial rules differ, so check the Canada Revenue Agency site for the latest limits and paperwork.
What does code W in Box 12 mean on a W-2?
Code W in Box 12 shows your employer’s HSA contributions made through payroll and kicks off Form 8889 on your federal return.
The amount in Box 12-W is just for your records—it doesn’t tweak your wages or withholdings. You report your own HSA contributions on Form 8889, line 1.
What’s Box 18 on my W-2?
Box 18 tracks wages hit by local, city, or other municipal income tax and might not match Box 1 (federal wages) or Box 16 (state wages).
New York City and Philadelphia, for instance, use Box 18 to log wages taxed at their local rates. Check your local W-2 instructions to be sure.
Does Box 1 include health insurance premiums?
No—Box 1 leaves out pretax health-insurance premiums taken under a Section 125 cafeteria plan.
If Box 1 is lower than your gross paycheck, it’s usually because of pretax health-insurance and retirement-plan deductions. For more on how health insurance impacts your taxes, see where to get your health insurance tax form.
