What Is Box 12C on a W-2? Group-Term Life Insurance

Code C in Box 12 of your W-2 is the taxable value of employer-provided group-term life insurance coverage above $50,000. It’s imputed income: your employer didn’t pay you cash, but the IRS treats the value of that extra coverage as wages. The number is already included in your Box 1, Box 3, and Box 5 wages, so you don’t add it to your income again when you file.¹

The letter after “Box 12” (12a, 12b, 12c, or 12d) only tells you which line your employer used. Code C means the same thing wherever it appears.¹

Why There’s a Taxable Amount at All

Federal law excludes the first $50,000 of group-term life insurance your employer provides from your income. Only coverage above that line is taxable.² If your employer provides $150,000 of coverage, the tax calculation runs on $100,000, not $150,000.

The $50,000 threshold is fixed in the statute. It doesn’t adjust for inflation, salary, age, or filing status. If you pay part of the premium with after-tax dollars out of your paycheck, those contributions reduce the taxable amount dollar-for-dollar.²

How the Dollar Figure Is Calculated

The Code C amount is not based on what your employer actually pays the insurer. Instead, everyone uses the same IRS rate schedule called the Uniform Premium Table (Table I), which assigns a monthly cost per $1,000 of excess coverage based on your age on December 31 of the tax year.³ Table I rates often come in lower than real market premiums, which usually works in your favor.

Rates climb sharply with age. Someone under 25 is charged $0.05 per $1,000 of excess coverage per month; at 45–49 the rate is $0.15; at 60–64 it’s $0.66; at 70 and older it’s $2.06.⁴ That’s why the imputed amount can jump noticeably as you age into a new bracket, especially when coverage is tied to a multiple of your salary.

A Worked Example

You’re 47 on December 31, your employer provides $200,000 of coverage, and you contribute $10 per month after-tax toward the premium.

Excess coverage: $200,000 − $50,000 = $150,000
Monthly imputed cost: 150 × $0.15 = $22.50
Annual imputed cost: $22.50 × 12 = $270.00
Less your after-tax contributions: $270.00 − $120.00 = $150.00

Box 12 Code C would show $150.00. That same $150 is already baked into your Box 1, Box 3, and Box 5 wages.

What You Do With It on Your Return

Nothing extra. The Code C figure is informational. Your employer has already included it in Box 1 (federal taxable wages), Box 3 (Social Security wages), and Box 5 (Medicare wages), so adding it to your 1040 would tax it twice.¹

Because the amount is in Box 3 and Box 5, Social Security tax (6.2%) and Medicare tax (1.45%) have already been withheld on it.³ Federal income tax withholding on this imputed amount, though, is optional for the employer. Most payroll systems include it in regular withholding, but if yours doesn’t, you may owe a small amount at filing time.⁴

If your Medicare wages pass $200,000 in the calendar year, your employer also begins withholding the 0.9% Additional Medicare Tax on wages above that point, which includes the Code C imputed income.⁵

Situations Where the Usual Rules Don’t Apply

More-Than-2% S-Corporation Shareholders

If you own more than 2% of an S-corporation’s stock, you don’t get the $50,000 exclusion. The IRS treats you like a partner for fringe benefit purposes, and the entire cost of employer-provided group-term life insurance is taxable to you and reported on your W-2.⁴

Coverage on a Spouse or Dependent

Employer-paid life insurance on your spouse or a dependent uses a different threshold. If the face amount is $2,000 or less, the IRS treats it as a de minimis fringe benefit and excludes it entirely. Coverage above $2,000 on a spouse or dependent generally becomes taxable income to you.³

Retirees and Disabled Former Employees

Group-term life insurance taxation can follow you out of the job. For Section 79 purposes, a former employee is still treated as an employee, so retirees who keep employer-provided coverage above $50,000 still owe tax on the imputed income, reported on a W-2 even without regular wages.²

There’s one meaningful exception. If you’ve left the employer and are disabled within the meaning of IRC Section 72(m)(7), the imputed income is excluded from your gross income. To claim it, you attach substantiation to your return for the first year, including a doctor’s statement describing the impairment and a personal statement about how it affects your ability to work. In later years, a simple declaration that the condition continues is enough.⁶

Key Employees Under a Discriminatory Plan

If your employer’s plan favors key employees in eligibility or benefits, key employees lose the $50,000 exclusion entirely. Their taxable amount becomes the greater of the Table I cost or the actual premium cost paid by the employer.² Key employees generally include officers above the Section 416(i) compensation threshold, major shareholders, and certain highly compensated individuals, and the designation follows you into retirement if it applied when you separated from service.

1
Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) – Specific Instructions for Form W-2
2
Office of the Law Revision Counsel. 26 USC 79 – Group-Term Life Insurance Purchased for Employees
3
Internal Revenue Service. Group-Term Life Insurance
4
Internal Revenue Service. 2026 Publication 15-B – Employers Tax Guide to Fringe Benefits
5
Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
6
eCFR. 26 CFR 1.79-2 – Exceptions to the Rule of Inclusion