---
title: "Manage calculated fields in a crediting rule"
slug: "manage-calculated-fields-in-a-crediting-rule"
description: "Add calculated fields to apply fees, deductions, or commission percentages to transaction records."
updated: 2026-02-24T18:36:05Z
published: 2026-02-24T18:36:05Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://support.fullcast.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Manage calculated fields in a crediting rule

Calculated fields apply fees, deductions, or commission percentages to transaction records. For example, if a credit card type (like Visa or Mastercard) has a different fee, a calculated field would apply that fee to the total deal value.

Calculated fields are often used in combination with lookup fields. Lookup fields are run first followed by calculations. While all calculations can be done in a single field, create separate fields for each step of a calculation allows for more detailed reporting. This shows intermediate values to validate information and makes it easier to track how the final amount was derived.

## Before you begin

- [Create a crediting rule](/v1/docs/create-crediting-rules#create-a-crediting-rule).

## Manage a calculated field

You must save any changes made to calculated fields before you exit or all changes will be lost.

1. Go to **Commissions > Crediting Rules**.
2. Find and select a crediting rule.
3. In the **Calculated Fields** section, complete the following as needed:

AddEditDelete

1. Click **Add**.

![Add option for calculated fields.](https://cdn.document360.io/369efcf7-66f9-4f6b-9d45-9ca24a5b06cf/Images/Documentation/image(458).png)
2. Complete the following fields:

| Field | Description |
| --- | --- |
| **Field Name** | Type a name for the field or select an available field that will be referenced in ledgers and transactions. |
| **Formula Type** | Select the type of formula for the calculated field: - **Calculation:**Single formula calculated. - **Concatenation:** One or more formulas that are combined. |
| **Type** | Select the [data type](/plan-and-pay/docs/calculated-fields-syntax#calculated-field-data-types) for the field. |
| **Formula** | Reference the extracted fields to [build formulas](/plan-and-pay/docs/calculated-fields-syntax). |
3. Click **Add**.
4. Add as many calculated fields a needed.

You cannot change the name, formula type, or data type of a calculated field, you can only update the formula.

1. Find the calculated field you want to edit.
2. Click **edit**.

![Edit option for a calculated field.](https://cdn.document360.io/369efcf7-66f9-4f6b-9d45-9ca24a5b06cf/Images/Documentation/image(459).png)
3. Update the formula as needed.
4. Click **Update**.

1. Find the calculated field you want to delete.
2. Click **Delete**.

![Delete option for a calculated field.](https://cdn.document360.io/369efcf7-66f9-4f6b-9d45-9ca24a5b06cf/Images/Documentation/image(460).png)

1. Click **Save**.

## Use calculated fields in a transaction table

1. In the crediting rule, go to the **Transactions**tab.
2. Click the **Column Chooser**.
3. Drag and drop the calculated field from the **Column Chooser** to the transactions table.