After creating your budget, close the Budget Manager window, and select the budget in the left sidebar (below your accounts).

Select the “Edit” button at the top right of the budget screen to open the "Edit Budget" window.

Select the “+” button at the bottom left of the window, and enter the appropriate values for each column to create the budgeted items.

Amount -  
Enter the amount of money you'd like to budget for this category.

Category -  

Click on the drop-down menu to select the category you'd like to budget for.

Interval -  

Use the drop-down menu to select the frequency at which your budget will repeat. When selecting the interval, you can also choose whether you want the time period to be prorated or not.

Start Date -  

Select the date you'd like your budget for this item to begin.

End Date -

Select the date you'd like your budget for this item to end.
If you do not enter an end date, the budget item will continue indefinitely.

Note that if you have an expense or income item that has an irregular intervals or changes amounts throughout the year, you will need to enter individual line items for each instance, using the Start Date and Interval fields to define them. In this case you may find it easier to use the new budget format.

When you are done editing the budget, press "OK" at the bottom right of the window.

You will then see your budgeted items displayed in the main budget register.

When viewing the budget register, the column on the right displays your budget amounts for the specified time period. Click on the column heading to choose between one of the time periods below.

Calculate Budget -

To have Moneydance automatically calculate a budget based on your past spending, click the "Calculate" button in the "Edit Budget" window.The "Effective On" field is the date when you'd like your new budget to begin.

In the "Date" field, select the range of transactions you'd like to use in the calculations - Last Year, This Year, This Month etc. This will set the start date and end date fields accordingly.

Alternatively you can set the "Date" field as "Custom Date", and specify the date range manually.

The final field allows you to select the range you'd like to use when calculating this budget:
Annually, Tri-Monthly, Bi-Monthly, Monthly, Semi-Monthly, Tri-Weekly, Bi-Weekly, or Weekly.