The size of the annual budget is the amount the central government spends per year. The government lays out the estimated earnings and spending for the course of the year. <br /> <br />These estimates may undergo changes during the course of the year. <br /> <br />For instance, income tax collections may turn out to be higher or lower than expected. Similarly, expenditure may overshoot or fall short. <br /> <br />Gaurav Choudhury, Deputy Executive Editor at Moneycontrol explains everything you need to know about how revenue and spending estimates can change.
