Imputed Income Calculator — Group-Term Life Insurance
See how much taxable imputed income your employer-paid life insurance over $50,000 adds to your W-2, what it costs you in FICA tax, and where it lands in Boxes 1, 3, 5, and 12 code C.
Annual Imputed Income
$276.00Per Month of Coverage
$23.00FICA Cost to You (7.65%)
$21.11| Step | Amount |
|---|---|
| Total coverage | $150,000 |
| Less: §79 exclusion | −$50,000 |
| Excess coverage | $100,000 |
| Excess in $1,000 units (nearest tenth) | 100.0 |
| Table I monthly rate per $1,000 (age 51) | $0.23 |
| Imputed income per month | $23.00 |
| × 12 months covered | $276.00 |
| Annual imputed income | $276.00 |
| W-2 Box | Treatment | Amount Added |
|---|---|---|
| Box 1 (federal wages) | Included — taxed as ordinary income at filing | $276.00 |
| Box 3 (Social Security wages) | Included — 6.2% Social Security tax withheld | $276.00 |
| Box 5 (Medicare wages) | Included — 1.45% Medicare tax withheld | $276.00 |
| Box 12, code C | Informational — flags the same amount already in Box 1 | $276.00 |
The imputed income is subject to Social Security and Medicare tax, but your employer is NOT required to withhold federal income tax on it — the income tax settles when you file your Form 1040.
What is imputed income?
Imputed income is the taxable value of a benefit you receive in a form other than cash. You never see the money, but the IRS treats the benefit as if your employer had paid you its value in wages — so it shows up on your W-2 and gets taxed. The classic example, and the one this calculator handles, is employer-provided group-term life (GTL) insurance: the first $50,000 of coverage is tax-free, but the cost of anything above that is "imputed" to you as income even though your employer paid the premium.
If your pay stub shows a line like "GTL", "Group Term Life", or "Imputed income", this is what it is — an accounting entry that raises your taxable wages without raising your take-home pay. Your net pay drops only by the FICA tax withheld on the imputed amount.
The §79 rule: $50,000 tax-free, Table I above it
Under IRC §79(a), the first $50,000 of employer-provided group-term life coverage is excluded from your gross income. The $50,000 threshold was set in 1964 and has never been adjusted for inflation — which is why a benefit of one or two times salary now pushes many ordinary earners over the line.
For coverage above $50,000, the taxable cost is NOT what your employer actually pays the insurer. Instead, the IRS prescribes uniform monthly premium rates — "Table I" in Publication 15-B (26 CFR §1.79-3(d)(2)) — per $1,000 of excess coverage, banded by your attained age on the last day of the tax year. The excess coverage is figured to the nearest $100, the monthly cost is multiplied by the months of coverage, and any premium you paid with after-tax dollars is subtracted.
IRS Table I: monthly cost per $1,000 of excess coverage
These rates are statutory-static — unchanged since July 1, 1999 — and apply to every employer's plan regardless of what the insurance actually costs. Use your age on December 31 of the tax year.
| Attained age (Dec 31) | Monthly cost per $1,000 | Annual cost per $1,000 |
|---|---|---|
| Under 25 | $0.05 | $0.60 |
| 25 through 29 | $0.06 | $0.72 |
| 30 through 34 | $0.08 | $0.96 |
| 35 through 39 | $0.09 | $1.08 |
| 40 through 44 | $0.10 | $1.20 |
| 45 through 49 | $0.15 | $1.80 |
| 50 through 54 | $0.23 | $2.76 |
| 55 through 59 | $0.43 | $5.16 |
| 60 through 64 | $0.66 | $7.92 |
| 65 through 69 | $1.27 | $15.24 |
| 70 and older | $2.06 | $24.72 |
Note the steep age gradient: the same $100,000 of excess coverage costs a 40-year-old $120 of imputed income per year but a 70-year-old $2,472. Table I is also the reason "free" supplemental life through work can be worse than a private policy for older, healthy employees — the imputed income can exceed what a term policy would cost outright.
Worked example (from IRS Pub 15-B)
A 51-year-old employee has $150,000 of employer-paid group-term life coverage for the full year and contributes nothing toward it:
| Step | Amount |
|---|---|
| Coverage above the $50,000 exclusion | $100,000 |
| Excess in $1,000 units | 100.0 |
| Table I rate, age 51 (50-54 band) | $0.23/month |
| Monthly imputed income (100 × $0.23) | $23.00 |
| Annual imputed income (× 12 months) | $276.00 |
| FICA withheld on it (7.65%) | $21.11 |
The $276 appears in W-2 Boxes 1, 3, and 5 and in Box 12 with code C. The employee's actual out-of-pocket cost during the year is only the $21.11 of FICA — the income tax on the $276 is settled on the Form 1040.
W-2 Box 12 code C: where the number lands
Your employer reports the taxable GTL cost in four places on the W-2, but it is only taxed once:
- Box 1 — federal wages. The imputed income is included, so it is taxed as ordinary income when you file. No income-tax withholding was required on it during the year, which can slightly reduce your refund.
- Box 3 — Social Security wages. Included (up to the annual wage base); 6.2% was withheld.
- Box 5 — Medicare wages. Included with no cap; 1.45% was withheld.
- Box 12, code C. The same amount shown separately for information. You do not enter it anywhere on your return — it is already in Box 1.
Former employees may instead see codes M and N — uncollected Social Security and Medicare tax on GTL coverage that continued after leaving — which DO create a liability on Schedule 2. See the W-2 box guide for every box and code.
Other common types of imputed income
- Personal use of a company car. Valued under the annual lease value, cents-per-mile, or commuting rules in Pub 15-B and added to wages.
- GTL coverage on a spouse or dependent over $2,000. Loses the de minimis exception entirely — the full Table I cost is imputed, not just the excess over $2,000.
- Domestic partner health coverage. Employer-paid coverage for a partner who is not your tax dependent is imputed income at fair market value — one of the largest imputed amounts in practice.
- Employer-paid education over $5,250. Amounts above the §127 exclusion are wages unless they qualify as a working-condition fringe.
Frequently asked questions
What is imputed income?
Imputed income is the value of a non-cash benefit your employer gives you that the IRS treats as taxable wages even though no money changed hands. The most common example is employer-paid group-term life insurance coverage above $50,000 — the "cost" of the excess coverage, figured from IRS Table I, is added to your W-2 wages and taxed like ordinary pay.
Why does group-term life insurance over $50,000 create imputed income?
IRC §79(a) excludes only the first $50,000 of employer-provided group-term life coverage from your income — a threshold set in 1964 and never indexed for inflation. For coverage above $50,000, your employer must include the cost of the excess in your wages, using the uniform premium rates in IRS Table I rather than what the insurance actually costs.
What is W-2 Box 12 code C?
Code C in Box 12 of your W-2 reports the taxable cost of group-term life insurance over $50,000. It is informational — the same amount is already included in Box 1 (federal wages), Box 3 (Social Security wages), and Box 5 (Medicare wages), so you don't add it again anywhere on your return.
Do I pay tax on group-term life imputed income?
Yes, in two ways. It is subject to Social Security and Medicare (FICA) tax, which your employer withholds from your paychecks — 7.65% employee share. It is also ordinary income for federal income tax, but your employer is NOT required to withhold income tax on it; the income tax settles when you file your Form 1040 because the amount is baked into Box 1.
Which age do I use for the Table I rate?
Your attained age on the last day of the tax year (26 CFR §1.79-3(d)(3)) — effectively your age on December 31. If you turn 50 in November, the whole year is figured at the 50-54 band rate, not the 45-49 rate.
What if I pay part of the premium myself?
After-tax contributions you make toward the coverage reduce the imputed income dollar-for-dollar (it can't go below zero). Contributions made pre-tax through a cafeteria plan don't count — the IRS treats those as employer-paid.
Does coverage for my spouse or dependents create imputed income?
Employer-provided group-term life coverage on a spouse or dependent is a tax-free de minimis benefit only if the face amount is $2,000 or less. Above $2,000, the entire cost (not just the excess) is imputed income to you, figured with the same Table I rates at the spouse's or dependent's age.
What other benefits count as imputed income?
Common examples beyond group-term life: personal use of a company car, employer-paid health coverage for a domestic partner who isn't your tax dependent, gym memberships, employer-paid education above the $5,250 exclusion, and moving expense reimbursements (except for qualifying military moves). Each has its own valuation rules in IRS Pub 15-B.
Do the Table I rates change each year?
No. The Table I uniform premium rates are set by Treasury regulation (26 CFR §1.79-3(d)(2)) and have been unchanged since July 1, 1999. They only change if the regulation is amended — unlike wage bases and bracket thresholds, there is no annual inflation adjustment.
Sources
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