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

Fixed and variable monthly budgeted expenses should first be planned at the beginning of each budgeting period, typically at the start of the month. This allows individuals to assess their expected income, allocate funds accordingly, and adjust for anticipated variable expenses. Additionally, reviewing past spending patterns can help in accurately forecasting these expenses. Regularly revisiting and adjusting the budget throughout the month ensures financial goals are met.