Most people insure their cars and homes but not their most valuable asset: their ability to earn income. The Social Security Administration estimates that one in four 20-year-olds will become disabled before reaching retirement age. For workers in physically demanding occupations, the rate is even higher. Disability insurance replaces a portion of your income when illness or injury prevents you from working.
Short-Term vs. Long-Term Disability
Short-term disability (STD) covers income loss for 3–6 months after a qualifying illness or injury. Most employers provide some STD coverage. It fills the gap between when you stop working and when long-term disability kicks in.
Long-term disability (LTD) begins after the short-term period ends (the "elimination period," typically 90–180 days) and can last years, decades, or until retirement age. This is the coverage that actually protects your financial life from a serious disability.
The Most Important Policy Feature: Definition of Disability
"Any-occupation": You are disabled only if you cannot perform any job for which you are educated or experienced. The surgeon could be a teacher, so they're not "disabled" under this definition. This is the weaker (and cheaper) standard used in many group plans.
For professionals with specialised skills, own-occupation coverage is essential. The premium difference is meaningful, but so is the protection difference.
How Much Coverage You Need
Most policies replace 60–70% of your gross income. This sounds like a pay cut, but disability benefits from individually-purchased policies are paid tax-free (because you paid the premiums with after-tax dollars). Employer-paid disability benefits are taxable income. Factor in your tax bracket when calculating how much net income you need to replace.
Target: enough monthly benefit to cover your essential fixed expenses (housing, utilities, insurance, food, minimum debt payments) without drawing down savings indefinitely.
Group vs. Individual Policies
Employer group plans are cheaper but have several disadvantages: they use the "any-occupation" definition after 2 years, coverage ends when you leave the job, and benefit amounts are limited. If you have a high income or specialised profession, consider supplementing or replacing group coverage with an individually-owned policy.
Individual policies cost $150–$400/month for a healthy 35-year-old professional, depending on coverage amount, elimination period, and benefit period. A 90-day elimination period (covered by your emergency fund) significantly reduces the premium compared to a 30-day elimination period.
Who Needs It Most
Disability insurance is most critical if: you are the primary income earner in your household, you have dependents, you have significant debt, you work in a high-skill specialised field, or your savings are insufficient to cover more than 2–3 years without income. If you're single with no dependents and low fixed expenses, the calculus is different — but the risk of multi-year disability is the same for everyone.