---
title: "Implementation on subscriptions and invoices"
slug: "indices-application-sur-les-abonnements-et-factures"
updated: 2025-10-27T12:42:04Z
published: 2026-01-07T10:04:01Z
canonical: "help.frisbii.com/indices-application-sur-les-abonnements-et-factures"
---
> ## Documentation Index
> Fetch the complete documentation index at: https://help.frisbii.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Implementation on subscriptions and invoices
 | Reminder: Pedro and Clara are part of the DreamHouse sales team, and want to implement index revision for their customers' subscriptions.
D'Angelo has just shown them how to create indexes and index values. Now they want to apply them to one of their subscriptions.
They created a Housekeeping Index with these three values: - Housekeeping Index 2020-01: Coefficient = 1,00
- Housekeeping Index 2021-01: Coefficient = 1,03
- Housekeeping Index 2022-01: Coefficient = 1,06
Their customer has taken out a 2-year subscription and will renew for another year. |
The following articles should be consulted before an index can be applied:
- [Adding fields to page layouts](/frisbii-app/docs/en/indices-ajout-des-champs-sur-les-présentation-de-page)
- [Creating and adding values](/frisbii-app/docs/en/indices-création-et-ajout-des-valeurs)
## Applying an index
This article explains how to apply an index to the following objects:
### On the subscription
The use of an index allows you to revalue the subscriptions.
### Steps
1. Go to the Subscriptions tab.
2. Open the subscription on which you want to apply the index.
- Please note: the subscription must be in Draft status as the indexes should be defined when a subscription is created.
3. In the Indexes tab, retrieve your index via the Index lookup field.
 4. The following fields are automatically filled in:
- Reference index date: Date used to calculate the reference index value (default = subscription start date).
- Reference index value: Relationship to the index value used as reference (automatically set by the Date for Reference Index field).
- Reference index coefficient: Reference coefficient in the calculation of the revised price (automatically set via the Reference Index Value relationship).
###
### On the subscription line item
D'Angelo has saved the subscription changes, now he continues on the subscription line items.
Indexes may only be applied to some subscription line items and not others, depending on your business model.
### Steps
1. Following the modification of the subscription, go to the subscription line items.
2. Tick the Applicable index box ?
3. Save.
Following this operation, the following information is automatically entered on the subscription line item
### 
### On the invoice
The index is applied to both subscription line items in Pedro and Clara's subscription.
D'Angelo now shows them how to check whether the subscription invoices have taken the index revision into account.
### Steps
1. Open the subscription on which you applied the indexes.
2. Click on Generate Schedule.
3. **Validate** in the confirmation window*.*
4. Go to the **Invoices** related list.
5. Check the draft invoices. 
Pedro and Clara can see that the price of the second invoice has been revised, so the index has been correctly applied.
When they open the invoice, they see that the information related to the index is displayed.
### On the invoice line item
Pedro and Clara would also like to check the result on the invoice line items.
#### Steps
- From the Invoices related list of your subscription, click on one of the invoices.
- Go to one of the invoice line items.
- Check that the Applicable Index box is ticked.
Note: The Index to display? box is also checked, if:
- There is a subscription line item linked to this invoice line item,
- On the subscription line item, the Applicable index box is checked,
- If the Index Date of the invoice >= the Index Reference Date of the subscription line item.
### On the change order
Last step! Pedro and Clara want to check that the index review is working properly when they renew their subscription.
### Steps
1. From the relevant (activated) subscription, click on the **Renew** button.
2. In the confirmation window, click on **Confirm**.
3. Open the **Change orders** related list:
You can already see the index applied to the change order from the related list.
4. Open the change order by clicking on the **name of the change order**.
In the **Index** section you see the details:
Pedro and Clara are happy, the index revision implemented with D'Angelo has been taken into account on the different objects concerned.
They will be able to apply it to all the subscriptions concerned.