Some common reasons include: 1  a serious accident â such as a road accident, a severe head injury, a serious fall or severe burns. 2  a serious short-term condition â such as a heart attack or a stroke. 3  a serious infection â such as sepsis (blood poisoning) or severe pneumonia.
The definition of unnecessary is not needed. An example of something unnecessary is a bowl of sugar for cooking meatballs.
A necessary expense is one that is helpful and appropriate for your trade or business.. We make five distinctions when analyzing expenses. We separate personal expenses from business expenses. We separate business expenses into three broad types: cost of goods sold, capital expenditures, and deductible expenditures.