---
title: When is the indexation letter sent?
description: When does OWNER send the indexation letter? The difference between automatic invoicing and indexation on or off, and how to announce earlier.
---
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October 20, 2026
# When is the indexation letter sent?
## When the indexation letter goes out depends on the Automatically bill and index setting.
When the indexation letter reaches the tenant depends on the **Automatically bill and index?** setting.
**In this article**
1. [Automatic invoicing and indexation is on](https://knowledge.owner.app/en/indexation-letter-timing#automatisch-aan)
2. [Automatic invoicing and indexation is off](https://knowledge.owner.app/en/indexation-letter-timing#automatisch-uit)
3. [Should the tenant receive the letter earlier?](https://knowledge.owner.app/en/indexation-letter-timing#eerder-aankondigen)
## Automatic invoicing and indexation is on
The indexation is always planned, even if the figure isn't known yet. At the moment you set under **How many days before the due date?**, OWNER first applies the indexation and sends the indexation letter. Right after that (a few seconds later), the sales invoice with the new rent goes out.
Example: if the setting is 20 days and the new rent takes effect on January 1, the tenant receives the indexation letter and the sales invoice around December 12.
## Automatic invoicing and indexation is off
The indexation is only made ready once the figure is known. You then decide when to approve the indexation and send the indexation letter.
## Should the tenant receive the letter earlier?
There is currently one term for all indexation methods; there is no separate notice period per method. If you want to announce earlier, you have two options:
- Choose a larger number of days under **How many days before the due date?**. Note: this also applies to sending your sales invoices.
- Turn off **Automatically bill and index?**. Then you approve the indexation yourself and send the letter whenever you want.
You can find both settings under **Settings \> Modules \> Contracts \> Rental contracts**.
**Note:** the text of the indexation letter is fixed and can't be changed. Only the owner's logo and details can be set. The letter is sent in the language of the person who receives it ([here's how to set it](https://knowledge.owner.app/en/document-language?hsLang=en)).
Want to use a different percentage or amount? Read [Can I deviate from a scheduled indexation?](https://knowledge.owner.app/en/deviate-from-scheduled-indexation?hsLang=en) Is nothing ready? Read [Why isn't my indexation ready?](https://knowledge.owner.app/en/indexation-not-ready?hsLang=en)
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