The break-even point is one of the simplest yet least used analytical tools in management. It helps to provide a dynamic view of the relationships between sales, costs and profits. A better understanding of break-even, for example, is expressing break-even sales as a percentage of actual sales—can give managers a chance to understand when to expect to break even (by linking the percent to when in the week/month this percent of sales might occur).
The break-even point is a special case of Target Income Sales, where Target Income is 0 (breaking even).
 Other uses of the term
The break even point is also the point on a chart indicating the time when something has broken even, and is a general term for not having gained or lost something in a process.
The notion can also be found in more general phenomena, such as percolation, and is rather similar to the critical threshold. In energy, the breakeven point is the point where usable energy gotten from a process exceeds the input energy.
In computer science, the term refers to a point in the life cycle of a programming language where the language can be used to code its own compiler or interpreter. This is also called self-hosting. This usually marks a transition from a “toy” language to a language usable in the real world.
In medicine, it is a postulated state when the advances of medicine permit every year an increase of one year or more of the life expectancy of the living, therefore leading to medical immortality(barring accidental death).