Short answerDisability insurance replaces part of your paycheck when illness or injury stops you from working. It protects income, not medical bills.
What it actually is
Health insurance pays doctors. Disability insurance pays you. It sends a monthly check while you cannot work.
The check replaces part of your income, not all of it. The gap keeps the incentive to return.
Short-term vs long-term
Short-term coverage handles weeks to a few months. It covers recovery from surgery, injury, or a difficult pregnancy.
Long-term coverage handles years, sometimes to retirement age. It covers serious illness or lasting injury.
The two stack. Short-term carries the early months while long-term waits in the wings.
Employer coverage vs individual
Many employers offer group disability coverage. It is cheap or free, but it ends when the job ends.
An individual policy is yours alone. It follows you between jobs, and you control the terms.
Start from what work already gives you. You may need only a supplement, not a full policy.
Elimination period and benefit period
The elimination period is the wait before checks start. A longer wait means a lower premium.
The benefit period is how long checks keep coming. Choices range from a few years to retirement age.
A long wait with a long benefit period costs less than coverage that starts on day one.