---
title: Why isn't my indexation ready?
description: "Is your indexation not ready in OWNER? See the causes: method without automatic calculation, CPI not known yet, end date or no method."
---
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October 20, 2026
# Why isn't my indexation ready?
## The most common reasons an indexation isn't ready, with the solution.
Expecting an indexation, but it's not under **Contracts \> Indexations**? Usually a figure is missing or something in the rental contract prevents OWNER from preparing the indexation.
**In this article**
1. [Causes and solutions](https://knowledge.owner.app/en/indexation-not-ready#oorzaken)
2. [Has the sales invoice already been sent without indexation?](https://knowledge.owner.app/en/indexation-not-ready#al-gefactureerd)
## Causes and solutions
| Cause | Solution |
| --- | --- |
| The rental contract uses **Vrije sector**, **Middenhuur** or **Sociale huur** (Dutch free-sector, mid-rent or social housing). | OWNER doesn't calculate automatically for these methods yet. Index manually by deviating from the scheduled indexation. See [Can I deviate from a scheduled indexation?](https://knowledge.owner.app/en/deviate-from-scheduled-indexation?hsLang=en) |
| The CPI figure isn't known yet (Monthly CPI or Annual average CPI) and automatic invoicing and indexation is **off**. | Wait for the final CBS figure; OWNER doesn't use provisional figures. As soon as the figure is available, the indexation is made ready automatically. |
| No indexation method or indexation date has been entered in the rental contract. | Open the rental contract, click the pencil and, under **Indexation**, enter the **Indexation method** and the date under **Next indexation**. See [Which indexation methods are there and how do you link them?](https://knowledge.owner.app/en/indexation-methods?hsLang=en) |
| The rental contract has an end date before the indexation date. | Change the end date or remove it. OWNER then creates the indexation after all. |
| A Belgian rental contract concluded before February 1, 1994. | The Belgian methods can't automatically calculate such old rental contracts. Deviate from the scheduled indexation and enter the correct amount or percentage yourself. |
| A unit outside the Netherlands or Belgium. | There are no CPI methods here. Use a custom method with a fixed percentage: [How do I index by the same percentage every year?](https://knowledge.owner.app/en/fixed-percentage-indexation?hsLang=en) |
## Has the sales invoice already been sent without indexation?
If automatic invoicing and indexation is **on**, the indexation is always planned. If the figure isn't known yet on the sending date, the sales invoice may still go out with the old rent. So check the planned indexations before the sending date.
Has the sales invoice already been sent? Then create a sales invoice for the difference yourself via **Financial \> Sales invoices** and click **New**. If the indexation is laid down in the rental contract, you may charge the difference retroactively.
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