Before you start
Create the fields your calculation needs first. A calculation can use:- Number and Decimal fields
- Other calculated fields
- A fixed number that you type into the calculation
Add a calculated field
This example adds a GST field to cases that works out GST as Case Fee × GST Rate %.Open the custom field settings
Choose Calculated

Calculated is the last option in the list of field types
Name the field
- Custom Field Name (required): The name shown on records, such as GST.
- Section (optional): The section the field appears in, such as Fees.
- Category (cases only, optional): Show the field only on cases in these categories.
- Description (optional): Extra help for your team. It appears in the field’s info icon on records.
Build the calculation

GST works out Case Fee × GST Rate %, and the grey box shows a worked example
Choose the decimal places
Check the preview
Save
What each step can do

The steps you can choose after Start with
How the calculation works
- Steps run in order, from the top down. There are no brackets. Each step uses the result of the step above it, like a calculator.
- Only the final result is rounded, to the field’s Decimal Places. When a step uses another calculated field, it uses that field’s rounded value, the same number you see on the record.
- A blank field gives a blank result. If any field a calculation uses is empty on a record, the result stays blank rather than showing 0. Dividing by 0 also gives a blank result.
- A calculation can’t use itself. Calculated fields that already use the field you are editing are greyed out in the list with Already uses this field.
- A calculation can have up to 20 steps.
How calculated fields show on records
A calculated field appears on the case, client or employer profile with the other custom fields. It can’t be typed in. Until it has a value, it shows Calculated automatically: on a new record until the fields it uses are filled in, and on a record that existed before you added the field until one of those fields is changed.
GST, Total and Balance Owing are worked out from Case Fee, GST Rate and Deposit Paid

The info icon shows the calculation

On a new case, GST and Total are worked out as soon as the Case Fee is typed in
Where else you can use calculated fields
- Lists: Show a calculated field as a column on the Cases, Clients or Employers list, and filter the list by it with Add filter, for example GST between 100 and 400. See Customise list columns.
- Contract and email templates: Use a calculated field as a placeholder, the same way as other custom fields. In the contract editor, calculated fields are listed under Placeholders marked (Calculated).
- Forms: A number question in a form can be prefilled from a calculated field. Answers can’t be saved back into a calculated field, because it can’t be typed in.
Changing a calculated field
To change a calculated field, go to the custom field settings and select the edit icon next to it. Change the steps or decimal places, then select Save. New steps apply to new records. Existing records keep the value they have, so a closed case doesn’t change because you changed the calculation today. An existing record gets the new steps when one of the fields the calculation uses is changed on it. For example, if GST uses a fixed rate of 15 and you change it to 10, an old case keeps its 15% GST until its Case Fee is changed. Then its GST, and any calculated field that uses GST such as a Total, is worked out with 10%. Before saving new steps, or when you turn a disabled calculated field back on, AdviserAide reminds you that existing records keep their current values. Select Save to go ahead.
Existing cases keep their current GST
Deleting fields used in a calculation
You can’t delete a field while a calculated field uses it. AdviserAide shows a message naming the calculated fields that use it, for example:Cannot delete custom field ‘Case Fee’ because it is used in these calculated fields: ‘GST’, ‘Total’. Change or delete those fields first.Change those calculated fields so they no longer use the field, or delete them first, then delete the field.
Examples
GST on a fee
GST = Start with Case Fee, × Multiply by % GST Rate A Case Fee of 1,000 with a GST Rate of 15 gives 150.00. Give GST Rate a default value of 15, so new cases start with 15%. For a client who is not charged GST, set GST Rate to 0 on that case and GST shows 0.00. For Australian GST, give GST Rate a default of 10 instead.Total including GST
Total = Start with Case Fee, + Add GST A Case Fee of 1,000 gives a Total of 1,150.00. If you don’t need a separate GST field, you can also use Start with Case Fee, + Add % GST Rate.Balance owing
A calculated field can use other calculated fields. Using the Total field above and a Deposit Paid decimal field: Balance Owing = Start with Total, − Subtract Deposit Paid A Total of 1,150.00 with a Deposit Paid of 250 gives 900.00. When the Case Fee changes on a case, GST, Total and Balance Owing all update.GST included in a fee
If your fees already include GST, work out the GST inside the fee like this: GST Included = Start with Case Fee, × Multiply by fixed number 15, ÷ Divide by fixed number 115 A Case Fee of 1,150 gives GST of 150.00.
GST included in a fee, worked out with fixed numbers
- Fee without GST: Start with Case Fee, ÷ Divide by fixed number 1.15. A fee of 1,150 gives 1,000.00.
- Australian GST included in a fee (10%): Start with Case Fee, ÷ Divide by fixed number 11. A fee of 1,100 gives 100.00.
- GST Divisor = Start with GST Rate, + Add fixed number 100. With a rate of 15, this gives 115.00.
- GST Included = Start with Case Fee, × Multiply by GST Rate, ÷ Divide by GST Divisor. A fee of 1,150 gives 150.00.