10.1 Disability Income Policies and Definitions of Disability
Key Takeaways
- Disability income insurance replaces 60%–70% of earned income; carriers never replace 100% to avoid moral hazard.
- Own occupation is the most liberal definition (best for insured, highest premium); any occupation is the strictest.
- Split definitions use own occ for 24 months, then switch to any occ.
- Residual benefits pay in proportion to income lost; presumptive disability pays automatically for specified losses.
- If the employer pays group LTD premiums, benefits are taxable; individually paid premiums produce tax-free benefits.
Disability income (DI) insurance replaces a portion of earned income when the insured cannot work because of sickness or injury. Unlike health insurance, which pays providers for medical bills, DI pays the insured a periodic income benefit to cover living expenses. DI is the most heavily tested health line on the national portion because the income-replacement logic, definitions, and probationary/elimination mechanics generate many exam questions.
Why Disability Risk Matters
The odds of a disabling event before retirement are far higher than the odds of premature death at working ages. A 30-year-old worker is several times more likely to suffer a disability lasting 90 days or longer than to die before age 65. Because of this, the human life value (HLV) and needs-based approaches used in life insurance apply equally to DI: the planner protects the income stream, not a lump sum.
Income Replacement Limits
Insurers never replace 100% of income. Replacing full income would remove the incentive to return to work (a moral hazard). DI carriers typically issue benefits equal to 60%–70% of gross earned income, and they coordinate with other coverage so the combined replacement does not exceed roughly 70%–80%.
Worked Example — Issue Limit
A prospect earns $100,000 of salary. Assume the carrier's issue-and-participation limit table allows 66 2/3% replacement.
| Step | Figure |
|---|---|
| Gross annual income | $100,000 |
| Replacement percentage | 66.67% |
| Maximum annual benefit | $66,667 |
| Maximum monthly benefit | $5,556 |
If the applicant already owns a group LTD policy paying $2,000/month, the carrier deducts it: $5,556 − $2,000 = $3,556/month of new individual coverage available. This coordination keeps total replacement under the issue limit.
Core Policy Types
- Individual DI — purchased personally; benefits are usually tax-free because premiums are paid with after-tax dollars.
- Group LTD/STD — employer-sponsored; if the employer pays premiums, benefits are taxable to the employee.
- Business overhead expense (BOE) — reimburses business expenses, not personal income (covered in 10.3).
- Key person and buy-sell DI — fund business continuity (covered in 10.3).
- Social Security disability — strict 'any occupation' standard; a 5-month waiting period.
Short-Term vs. Long-Term
Short-term disability (STD) typically pays for 13 to 26 weeks with elimination periods measured in days. Long-term disability (LTD) begins where STD ends and may pay for years, to age 65, or for life depending on the contract.
Definitions of Disability
The definition of disability is the single most important variable in a DI contract because it controls when a claim is payable.
Own Occupation ('Own Occ')
The insured is considered disabled if unable to perform the material duties of their own occupation, even if able to work in a different job.
- True own occ: pays full benefits even while the insured earns income in another occupation. Most liberal; highest premium.
- Modified own occ: pays only if the insured cannot do their own occupation and is not working elsewhere.
Example: A surgeon who loses fine motor control cannot operate. Under true own occ she collects full DI benefits even while teaching for a salary.
Any Occupation ('Any Occ')
The insured is disabled only if unable to perform any occupation for which they are reasonably suited by education, training, and experience. This is the strictest common definition; Social Security uses an even harsher 'any gainful occupation' standard. Premiums are lower because claims are harder to qualify for.
Split (Transitional) Definition
Many contracts use own occ for the first 24 months, then switch to any occ thereafter. This balances cost and protection and is a frequent exam answer.
Presumptive, Partial, and Residual
- Presumptive disability — automatically deemed totally disabled for specified losses (sight in both eyes, hearing, speech, two limbs) regardless of ability to work.
- Partial disability — flat reduced benefit when the insured can work part-time.
- Residual disability — benefit proportional to the percentage of income lost, the modern replacement for flat partial benefits.
Trap: 'Own occupation' is the BEST definition for the insured (easiest to claim, highest premium). 'Any occupation' is best for the insurer. Candidates often reverse these.
Residual Benefit — Worked Numeric
Residual disability pays in proportion to lost income. Suppose a policy has a $4,000/month total benefit, pre-disability income was $8,000/month, and the insured returns to part-time work earning $5,000/month.
| Step | Calculation | Result |
|---|---|---|
| Income loss | $8,000 − $5,000 | $3,000 |
| Loss percentage | $3,000 ÷ $8,000 | 37.5% |
| Residual benefit | 37.5% × $4,000 | $1,500/month |
Most contracts require a loss of at least 20% of income before any residual benefit is payable, and pay the full benefit once loss exceeds about 75%–80%.
Under a 'true own occupation' definition, a dentist who can no longer practice dentistry but takes a salaried teaching job will:
A worker earns $120,000. The carrier's issue limit is 60% and the applicant already has $3,000/month of group LTD. How much individual monthly benefit can be added?
Worked Example: Residual Benefit
A disabled insured returns to work part-time earning $3,000/month versus a $6,000 pre-disability income — a 50% loss. With a full benefit of $4,000/month, a residual rider pays the proportional loss: 50% x $4,000 = $2,000/month while partially disabled. This rewards a return to work without forfeiting all benefits.
Trap: a partial disability benefit pays a flat (often 50%) amount for a limited time; a residual benefit pays in proportion to income lost and typically runs the full benefit period. Know that "own occupation" is the most generous definition and "any occupation" the strictest.