Disability insurance is income replacement insurance — it pays a monthly benefit when an illness or injury prevents you from working. Most people insure their homes, cars, and lives without insuring the income that pays for all of those things. For working adults without substantial savings or a working spouse who could cover all household expenses, a disability would be financially catastrophic without coverage.
How common is disability?
More than 1 in 4 people who are 20 years old today will become disabled before reaching retirement age, according to the Social Security Administration. Among long-term disability claims, the average duration ranges from roughly 78 months for workers in their early 30s to 86 months for workers in their mid-40s, according to data cited by NerdWallet — not weeks, but years.
Social Security Disability Insurance (SSDI) exists but the average monthly benefit was $1,584 as of September 2025, according to SSA data. That’s below the poverty line for most families. Qualifying for SSDI is also difficult and slow — the application process often takes years, and approval rates are low.
Short-term vs long-term disability
| Feature | Short-term disability | Long-term disability |
|---|---|---|
| Elimination period | 0–14 days | Typically 90 days |
| Benefit period | A few months to 2 years | Several years to retirement age |
| Replaces | 60%–70% of base salary | 40%–60% of base salary |
| Source | Often employer-provided | Employer plan or individual policy |
The elimination period is the waiting time between when a disability begins and when benefits start. Short-term disability covers the early months; long-term disability picks up after the elimination period ends. Coordinating both ensures no gap in coverage.
What disability insurance typically pays
Long-term disability insurance generally replaces 40%–60% of your pre-disability income. Individual policies tend to offer higher replacement rates than group employer plans. Benefits are usually capped at a monthly maximum (such as $10,000/month) regardless of income.
Group employer LTD plans often replace 60% of base salary, excluding bonuses and commissions. If you earn variable compensation, check whether your plan covers only base salary — and whether you need a supplemental individual policy.
Do you need it?
You likely need disability coverage if:
- Your income is essential to covering household expenses
- You have fewer than 3–6 months of living expenses saved
- Your employer doesn’t offer long-term disability insurance
- You’re self-employed (no employer coverage at all)
You may need less coverage if your spouse earns enough to support the household independently, or if you have substantial liquid assets and could self-insure a multi-year income gap.
Types of policies
Group employer plans are the most common source. Many mid-to-large employers offer short-term and long-term disability as a benefit, sometimes at no cost to the employee. The downside: benefits are typically taxable, coverage ends when you leave the employer, and benefit definitions may be less favorable than individual policies.
Individual disability policies are portable, stay with you between jobs, and often have more favorable terms. They cost more — premiums generally range from 1% to 3% of your annual income for long-term coverage, varying by age, occupation, benefit period, and elimination period — but provide more reliable protection.
Two key policy features to look for:
- Own-occupation definition: pays if you can’t do your specific job, even if you could technically work in a different field. Important for high-skilled professionals.
- Noncancelable and guaranteed renewable: the insurer cannot cancel your policy or raise your premiums as long as you pay on time.
State disability programs
California, Hawaii, New Jersey, New York, and Rhode Island require employers to carry short-term disability insurance for employees. Benefit durations and replacement rates vary by state — California’s program, for example, can pay benefits for up to 52 weeks. If you work for a covered employer in one of these states, you have a baseline of short-term coverage; self-employed workers and some categories of public employees may need to opt in separately.
Where to start
Check your employer benefits first — most large employers offer group LTD and STD. If the plan has gaps (low replacement rate, taxable benefits, no own-occupation definition), explore individual policies from an independent insurance broker who can compare multiple carriers.