Critical illness cover is designed to pay a lump sum when the policyholder is diagnosed with, or undergoes a procedure for, one of the specified serious medical conditions covered by the policy, subject to definitions and survival periods. The lump sum can then be used flexibly, for example to reduce a mortgage, fund treatment, pay for care, adapt a home, or support lifestyle costs during recovery. This is different from income protection, which is intended to replace a proportion of earnings through regular payments when the policyholder cannot work due to incapacity. It is also different from private medical insurance, which typically covers eligible medical treatment costs rather than providing cash. Long-term care cover is aimed at meeting care costs when ongoing care is required, usually later in life, and it commonly pays benefits based on care needs rather than a diagnosis of a critical illness. CISI-style questions often test product purpose and benefit shape. The defining feature of critical illness cover is the lump sum payable on diagnosis of a specified condition.