The document discusses the concept of time value of money. It defines time value of money as the principle that money received in the present is worth more than the same amount received in the future. This is because money available now can earn interest and has greater purchasing power than the same amount in the future due to inflation and uncertainty. The document also discusses how time value of money is an important concept used in investment decisions, capital budgeting, and financing decisions to evaluate costs and returns over time.