Personal Finance · 5 min read · 2026-01-31
The 9-variable disability sizing.
Disability is the under-insured catastrophe in personal finance. Nine variables size the policy correctly.
1 in 4 workers face disability. Most have no individual coverage.
Approximately 1 in 4 working-age Americans will face a disability lasting 90 days or more. The financial impact — lost income for months or years — is the single largest household risk in working years. Most workers rely on inadequate employer coverage and Social Security Disability with multi-year approval timelines.
The nine indicators
The nine variables of disability sizing.
Each is a household-specific input that determines the appropriate coverage. The composite produces the right policy.
Income replacement target percentage
Threshold: 60–70%
Most policies replace 60–70% of pre-disability income. Higher replacement creates moral hazard and is rarely available.
Own-occupation vs any-occupation definition
Pattern: own-occupation preferred
Own-occupation pays if you can't do your specific job. Any-occupation pays only if you can't do any job. Vast difference in coverage.
Elimination period (waiting period)
Threshold: 90 days typical
Longer elimination periods reduce premium. 90 days is the standard balance between premium cost and emergency-fund need.
Benefit period (years covered)
Threshold: to age 65 or 67
Lifetime benefit is gold standard but expensive. To-age-65 is the typical compromise. Short benefit periods (2–5 years) leave gaps.
Cost of living adjustment (COLA)
Pattern: rider available
COLA rider increases benefit annually with inflation. Important for long-disability scenarios; adds 10–20% to premium.
Existing employer-provided coverage
Pattern: 1–3× salary typical
Employer LTD typically replaces 50–60% of salary, sometimes capped. Individual policies supplement to higher replacement.
Occupation class and risk
Pattern: white-collar vs manual
Coverage cost varies dramatically by occupation. Surgeons and dentists face highest premiums; office workers lowest.
Social Security Disability eligibility
Pattern: backup with multi-year delay
SSDI provides modest income but with 1–3 year approval cycles. Cannot be relied on for primary disability replacement.
Future income growth expectations
Pattern: future-purchase option
Future Increase Option riders allow buying additional coverage as income grows without further underwriting. Valuable for early-career professionals.
Why disability is the most under-insured risk
Death is the well-known catastrophic risk; life insurance markets are mature and most households have some coverage. Disability is statistically more likely (1 in 4 vs 1 in 50 for premature death) but markets are smaller and most households are uninsured.
The financial impact of long-term disability is often more devastating than premature death. A household losing the working spouse to death faces a single financial event; a household losing income to multi-year disability faces ongoing medical costs, lost income, and depleted assets. Disability that lasts 5+ years can wipe out savings completely.
Own-occupation is the gold standard
Own-occupation policies pay if the insured cannot perform their specific job. A surgeon who develops hand tremors collects benefits even if they can work as a hospital administrator. Any-occupation policies pay only if the insured cannot do any job suitable to their education and experience. The same surgeon may not collect under any-occupation if they can do administrative work.
Own-occupation coverage is materially more expensive but provides much stronger protection. For high-income professionals (physicians, attorneys, executives), own-occupation is generally worth the premium. For lower-income workers, the cost differential may not justify it.
Employer LTD is rarely sufficient
Employer-provided long-term disability coverage typically replaces 50–60% of base salary, with caps that limit higher earners. The benefit is taxable if the employer pays the premium. Bonuses and equity compensation are often not covered.
Individual disability supplemental policies fill the gap. The combination of employer LTD plus individual policy can replace 70–80% of total compensation, with the individual portion tax-free if the individual paid the premium. The structure matters.
When to buy
Disability insurance is most affordable for young, healthy professionals. Lock in coverage with future-increase riders that allow expansion of benefits as income grows. The same coverage purchased mid-career is often 2–3× more expensive due to age and health changes.
The discipline is to evaluate coverage early, lock in own-occupation language and future-increase capacity, and maintain coverage through career changes (individual policies are portable; group LTD is not).
Get the nine, every Monday.
Free weekly digest. The only U.S. equity letter that publishes a name only when nine independent signals align.
Common questions
Questions.
Is disability insurance worth the cost?
For most working-age earners with dependents and limited assets, yes. The probability and severity of disability justify the premium.
Does my employer LTD count?
Partially. Group LTD typically has lower replacement, broader 'any occupation' definitions, and is taxable if employer-paid. Supplement with individual coverage.
What about pregnancy?
Routine pregnancy is generally not covered. Complications from pregnancy may be covered. Read the policy.
Are there age limits?
Coverage typically caps at 65 or 67. Pre-retirement coverage is the design intent.
Can I get coverage if I'm self-employed?
Yes, individual disability policies are widely available. May require more income documentation than employee policies.
What's the difference between SSDI and private disability?
SSDI is federal, requires multi-year approval, has strict 'unable to do any work' definition, and pays modest amounts. Private disability fills the gap with broader coverage and faster decisions.
One name. Sometimes weeks of silence. Always with conviction.
Free weekly digest. No credit card. Unsubscribe anytime.