Question

When should fixed and variable monthly budgeted expenses first be planned?

Answer 1

at the start of each month

Answer 2

Fixed expense refer to the cost that does not fluctuate no matter how much you produce or sell,

Variable expense refer to the cost that fluctuate according to how much you produce or sell.

They both should be planned and budgeted before the operational process, Ideally before the new operational period began ( every 1 year)