12.2 Group Underwriting and Contribution/Participation
Key Takeaways
- Group underwriting evaluates the group as a whole, so most members are covered without individual medical evidence.
- Community rating uses area-wide claims (small groups); experience rating uses the group's own history (large groups).
- Noncontributory plans require 100% participation; contributory plans require about 75% participation.
- Employer-paid group health premiums are deductible to the employer and not taxable income to employees; medical benefits are received tax-free.
- For disability, the party that received the premium tax break is the party taxed on the benefits (employer-paid = taxable benefits).
Group vs. Individual Underwriting
In individual health insurance the underwriter evaluates each applicant's medical history. In group underwriting the insurer evaluates the group as a whole, not each member. The underwriter examines the nature of the business, the size and age/sex distribution of the group, geographic location, the stability of the workforce, and prior claims experience. Because the group is judged collectively, most members obtain coverage without individual medical evidence — a major reason group coverage is easier to get than individual coverage.
Rating Methods
Two methods set group premiums:
- Community rating — all groups (or all members in an area) pay rates based on the broad community's expected claims, ignoring a single group's experience. Common for small groups under the ACA.
- Experience rating — premiums reflect the individual group's own claims history. Larger employers (often 100+ or 500+ lives) are experience-rated because their data is statistically credible.
| Feature | Community Rating | Experience Rating |
|---|---|---|
| Basis | Area-wide expected claims | The group's own claim history |
| Typical group size | Small groups | Large groups |
| Year-to-year volatility | Low | Higher (rewards/penalizes group) |
| Incentive to manage claims | Weak | Strong |
Contributory vs. Noncontributory Plans
Who pays the premium drives the required participation level:
- Noncontributory plan — the employer pays 100% of the premium; the employee pays nothing. Because cost is no barrier, insurers require 100% participation of eligible employees. Full participation virtually eliminates adverse selection.
- Contributory plan — the employee shares the cost. Insurers typically require a minimum of 75% participation of eligible employees. The threshold guards against a pool made up mostly of high-risk members who alone find the premium worthwhile.
Memorize the pairing: noncontributory = 100%, contributory = 75% (a frequently tested figure).
A contributory group health plan typically requires what minimum participation rate of eligible employees?
Worked Example — Why Participation Matters
An employer has 200 eligible employees and offers a contributory plan. The insurer requires 75% participation. The plan needs at least 200 x 0.75 = 150 enrolled employees to be issued. If only 120 enroll (60%), the insurer can decline or re-rate the case, because a 60% pool is more likely to be skewed toward employees who expect heavy claims.
Now compare a noncontributory design on the same group: the employer pays the entire premium, every eligible employee is automatically covered, and participation is 200/200 = 100%. The full pool dilutes any single high-risk life, which is exactly why insurers demand 100% participation when employees contribute nothing.
Taxation of Group Health Premiums
Tax treatment is a high-yield topic:
- Employer-paid premiums for group health are a deductible business expense to the employer and are not taxable income to the employee.
- Employee contributions made through a Section 125 cafeteria plan are paid with pre-tax dollars, lowering taxable wages.
- Benefits received for medical expense reimbursement are generally received income-tax-free by the employee.
Contrast disability: if the employer paid the disability premium (and did not include it in the employee's income), the disability benefits are taxable to the employee. If the employee paid with after-tax dollars, the benefits are tax-free. This 'who-paid-the-premium' rule is a classic exam trap — the party who got the tax break on the premium is the party who is taxed on the benefit.
An employer pays the entire disability income premium for employees and does not include it in their taxable wages. How are disability benefits treated when received?
Group Life: The $50,000 Imputed Income Rule
Group term life insurance has its own tax wrinkle that often appears beside group health items. Employer-paid group term life is income-tax-free to the employee only up to $50,000 of coverage. The cost of employer-provided coverage above $50,000 is imputed income — taxable to the employee using the IRS Table I rates, even though no cash changes hands.
Worked Example — Imputed Income
An employer provides $130,000 of group term life. The first $50,000 is tax-free. The taxable portion is the cost (per Table I) of the excess $130,000 - $50,000 = $80,000. If Table I prices that age band at, say, $0.10 per $1,000 of coverage per month, the monthly imputed income is ($80,000 / $1,000) x $0.10 = $8.00, or $96 added to the employee's annual W-2 wages. The employee never receives cash but pays tax on this imputed amount.
Eligibility-to-Underwriting Linkage
Underwriting and participation work together. A weak participation rate signals adverse selection, so the underwriter may raise rates, add a probationary period, or require evidence of insurability for late enrollees. By contrast, automatic 100% noncontributory enrollment lets the underwriter offer the most favorable group rate because the pool is complete and self-selection is impossible. This is why insurers tie the participation threshold directly to who pays the premium.
Probationary Period vs. Participation — A Common Confusion
Do not confuse the participation requirement with the probationary period. Participation measures how many eligible employees enroll (the 75%/100% test). The probationary period measures how long a new hire waits before becoming eligible at all (ACA caps it at 90 days). A group can satisfy 100% participation among currently eligible employees even while several brand-new hires sit in their probationary period and are not yet counted. The underwriter watches both: low participation signals selection risk, while an unusually long or waived probationary period can let already-impaired new hires onto the plan too quickly.
Section 79 in Brief
IRC Section 79 is the code section governing the tax treatment of employer-provided group term life — the source of the $50,000 exclusion and the Table I imputed-income calculation described above. Knowing the section number is occasionally tested, but the substantive point is the dollar threshold: the first $50,000 is tax-free, the excess is imputed income.