Individual disability insurance is important because most people's greatest asset is their ability to earn an income. Statistics show that about 1 in 3 women and 1 in 4 men will be disabled for 3 months or longer at some point in their career. Disability can jeopardize one's finances and quality of life. The key sources of disability income are employer-provided short-term and long-term disability insurance, Social Security, and individual disability insurance policies. It is important to understand the benefits and limitations of different policies to ensure adequate financial protection in the event of a disability.