5.3 Disability Income Insurance

Purpose of Disability Income (DI)

Disability income (DI) insurance replaces a portion of an insured's earned income when a covered sickness or injury prevents them from working. It does not pay medical bills — that is the job of health insurance. Because insurers want the insured to retain an incentive to return to work, DI policies typically replace only 60–70% of gross income and cap benefits at a percentage of earnings.

Defining Total Disability

How a policy defines "total disability" controls when benefits are paid. There are three tested definitions, from most to least favorable to the insured:

Under an own-occupation definition, a surgeon who loses fine motor control is totally disabled even if she could teach, because she cannot do her own job. Under an any-occupation definition, she would not qualify if she could reasonably work in another suitable role. The modified or split definition is the common compromise: it pays on own-occupation terms for the first two years, then switches to the stricter any-occupation standard.

Elimination Period and Benefit Period

The elimination period (waiting period) is the time that must pass after disability begins before benefits start — it functions like a time deductible. Common choices are 30, 60, 90, or 180 days; a longer elimination period lowers the premium because it eliminates short, frequent claims. Note that benefits are paid in arrears, so a 30-day elimination period means the first check arrives roughly 60 days after disability onset.

The benefit period is the maximum length of time benefits are paid for a single disability — common periods are 2 years, 5 years, to age 65, or lifetime. A longer benefit period raises the premium.

Residual and Partial Disability

Many insureds recover enough to work part-time or in a lower-paying role. Two provisions address this:

• Residual disability pays a proportional benefit based on lost income. If a returning insured earns only 60% of pre-disability income (a 40% loss), the policy pays 40% of the total benefit. Most residual provisions require a minimum income loss (often 20%) to qualify.
• Partial disability pays a flat, usually reduced benefit (often 50% of the total benefit) for a limited time when the insured can do some, but not all, job duties.

The distinction the exam draws: residual ties payment to actual percentage of lost earnings; partial pays a fixed reduced amount.

Common DI Riders

Other provisions include waiver of premium (premiums waived while disabled) and presumptive disability (automatic total-disability benefits for loss of sight, hearing, speech, or two limbs, often with no elimination period).

Business Uses of DI

• Key person (key employee) disability — the business owns the policy and receives benefits to offset losses when a vital employee is disabled.
• Disability buy-sell — funds a buy-out of a disabled owner's business interest; benefits are typically paid as a lump sum after a long elimination period (commonly 12 months).
• Business overhead expense (BOE) — reimburses the business for ongoing fixed expenses (rent, utilities, employee salaries) while the owner is disabled. BOE benefits cover expenses, not the owner's salary, and are limited to actual expenses incurred.

Benefit Amounts and Taxation

The taxation rule is a near-certain exam question and follows who paid the premium:

• Individually paid (after-tax) premiums → benefits are received income-tax-free.
• Employer-paid premiums (group DI) → benefits are taxable to the employee, because the premium was a deductible business expense not taxed to the employee.
• Shared → benefits are taxable in proportion to the employer's share.

Business overhead expense premiums are tax-deductible to the business, and BOE benefits are taxable but offset by the deductible expenses they reimburse.

Probationary Period and Recurrent Disability

Two provisions round out a DI policy. The probationary period is a one-time waiting period at the start of the policy (often 10–30 days) during which sickness-related disabilities are not covered; this prevents people from buying coverage for an illness already brewing. Note it applies only to sickness, not accidents.

The recurrent disability provision treats a relapse of the same disability within a set period (commonly 6 months) as a continuation of the original claim — so the insured does not have to satisfy a new elimination period. If the relapse occurs after that window, it is treated as a new disability with a fresh elimination period.

Putting the Numbers Together

Consider an insured with a $4,000/month benefit, a 90-day elimination period, and a benefit period to age 65. If she is totally disabled by accident, benefits begin paying after 90 days (paid in arrears, so the first payment arrives near day 120) and continue up to age 65. A longer elimination period or shorter benefit period on the same policy would lower her premium; richer own-occupation and COLA features would raise it. These trade-offs — premium versus elimination period, benefit period, and definition of disability — are the heart of DI exam questions.