The functional budget is one that relates to any of the functions of an organization. The number of functional budgets depends upon the size and nature of business. The following are the commonly used:
A flexible budget is a budget that takes into account changes in sales volume and other cost driver activities.
The budget incorporates the effects on each cost and revenue as a result of the change in activity. It determines the variability of the cost along with the level of activity, which will be then used as a control tool. The aim of this budget is to control the cost.
A budget manual is a document that sets outstanding instructions governing the responsibilities of persons and the procedures, forms and records relating to the preparation and use of budgets and it is a booklet containing standing instructions regarding the procedures to be followed and the time schedules to be observed.
To line up the various functions of the Budget Committee, to bring them together and to co-ordinate their efforts in the matter of preparation of target figures, there should be a person usually designated as the Budget Controller, who can provide ready data relating to all the functions. He is more or less the secretary to the budget committee. The Budget Controller does not control; he is a staff man; he advises but does not issue instructions.