---
title: "Create item groups on estimates and invoices in the ServiceTitan Field Mobile App"
slug: "create-item-groups-on-estimates-and-invoices-in-fma"
tags: ["Area - Field Mobile App (FMA)", "Area - Estimates and Sales", "Role - Technician", "Focus - Service Replacement", "Focus - Construction", "Type - Commercial", "Type - Residential"]
updated: 2026-10-28T13:02:40Z
published: 2026-10-28T13:02:40Z
canonical: "help.servicetitan.com/create-item-groups-on-estimates-and-invoices-in-fma"
---

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

# Create item groups on estimates and invoices in the ServiceTitan Field Mobile App

## Overview

Add sub-items to create item groups on estimates and invoices in the Field Mobile App. This allows you to bundle services into a single line, increasing the scope of work without giving the customer visibility into material prices or hourly rates.

---

### 

#### Who uses this feature

- Technicians
- Applies to all business types

#### Feature configuration

- The Field Mobile App is optimized for iOS, iPadOS, and Android phones and tablets. For more, see [System requirements and mobile app information](/v1/docs/system-requirements).
- If you're using the Field Mobile App and need support, please contact [Technical Support](http://go.servicetitan.com/ask) (through the office) or reach out directly to [support@servicetitan.com](mailto:support@servicetitan.com).

## Things to know

- In Commercial terminology, jobs are referred to as work orders.
- The names of certain screens, tabs, and so on may be different based on your selection in **Menu** ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/icon-grid-view-outline.png?sv=2026-02-06&spr=https&st=2026-11-12T08%3A03%3A03Z&se=2026-11-12T09%3A03%3A03Z&sr=c&sp=r&sig=1U2pYdyWAdC8tgpqq0RFxhRo7LP3p23TcSH748%2F0v8k%3D) **> Settings**. For more, see [Show Residential or Commercial terms in the ServiceTitan Field Mobile App](/v1/docs/show-residential-or-commercial-terms).

## Use cases

- You sell a water heater installation but you also need to charge the customer for additional parts to complete the job and to dispose of the previous water heater.

## Add sub-items while adding a new item to an estimate or invoice in the Field Mobile App

1. Open your job (Residential) or Work Order (Commercial) and tap the tab you need:
  - **Estimates** or
  - **Invoice** (Residential) or **Work Order** (Commercial)
2. For estimates, tap **+ Add Items** on the estimate.
3. For invoices, tap **Add** or **View** in the *Invoice/Work Order Items* section.
4. Tap **Add Items** and use the pricebook to find, open, and **Add** the item then tap the **item** to open it.
5. Tap **+ Sub-Items**. ![Air conditioning unit installation details with pricing and options for sub-items.](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/create-item-groups-on-estimates-and-invoices-in-the-servicetitan-field-mobile-app-image-vtgncu91.png?sv=2026-02-06&spr=https&st=2026-11-12T08%3A03%3A03Z&se=2026-11-12T09%3A03%3A03Z&sr=c&sp=r&sig=1U2pYdyWAdC8tgpqq0RFxhRo7LP3p23TcSH748%2F0v8k%3D)
6. Use the pricebook to find and open the item you want to add as a sub-item then tap **Add**.
7. Tap **Create Item Group > Add** then select **Add to Estimates** or **Add to Invoice** (Residential) or **Add to Work Order** (Commercial).

## Add sub-items to an existing item on an estimate or invoice in the Field Mobile App

1. Open your job (Residential) or Work Order (Commercial) and tap the tab you need:
  - **Estimates** or
  - **Invoice** (Residential) or **Work Order** (Commercial)
2. For estimates:
  1. Open the estimate.
  2. Tap **Edit** in the *Items* section.
  3. Tap the **item** to open it.
3. For invoices:
  1. Tap **View** in the *Invoice/Work Order Items* section.
  2. Tap the **item** to open it.
4. Use the pricebook to find and open the item you want to add as a sub-item then tap **Add**.
5. Tap **Create Item Group > Update**.

## Edit item groups in the Field Mobile App

1. Open your job (Residential) or Work Order (Commercial) and tap the tab you need:
  - **Estimates** or
  - **Invoice** (Residential) or **Work Order** (Commercial)
2. For estimates:
  1. Open the estimate.
  2. Tap **Edit** in the *Items* section.
3. For invoices:
  1. Tap **View** in the *Invoice/Work Order Items* section.
4. Make the necessary changes then tap **Save**.

> [!TIP]
> **Tip:** You can edit the item group name and description by tapping **Edit** ![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/icon-edit.png?sv=2026-02-06&spr=https&st=2026-11-12T08%3A03%3A03Z&se=2026-11-12T09%3A03%3A03Z&sr=c&sp=r&sig=1U2pYdyWAdC8tgpqq0RFxhRo7LP3p23TcSH748%2F0v8k%3D) under *Item Groups*.

![User interface for estimating item groups with editing options and pricing details.](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/create-item-groups-on-estimates-and-invoices-in-the-servicetitan-field-mobile-app-image-floa366h.png?sv=2026-02-06&spr=https&st=2026-11-12T08%3A03%3A03Z&se=2026-11-12T09%3A03%3A03Z&sr=c&sp=r&sig=1U2pYdyWAdC8tgpqq0RFxhRo7LP3p23TcSH748%2F0v8k%3D)

## Want to learn more?

- See [Replace items on estimates and invoices in the ServiceTitan Field Mobile App](/v1/docs/replace-items-on-estimates-and-invoices-in-fma)
- See [Present and sell estimates in the ServiceTitan Field Mobile App](/v1/docs/present-and-sell-estimates-in-fma)