+0.42% for the national farm index in 2025

The farm rent index is used to calculate the amount of rent to be paid by the farmer to the lessor for rented agricultural land.

1. Background and presentation of the 2025 index

By ministerial decree of 23 July 2025, published in the Journal officiel on 27 July 2025, the national farm index for 2025 was set at 123.06 (base 100 in 2009).

This represents an increase of +0.42% compared with the index for 2024, which was 122.55, with an increase of +5.23% compared with 2023.

2. Calculation methodology

The index is made up of two heavy components:

•  60% based on the change in the national Gross Farm Income (RBEA) per hectare index over the last five years.
• 40% based on changes in the consumer price index or domestic Gross Domestic Product (GDP).

The calculation formula is therefore :

Farming index = (0.6 × RBEA index) + (0.4 × GDP index)

It is defined by decree no. 2010-1126 of 27 September 2010.

3. Period of application

The 2025 index applies to farm rent due between 1 October 2025 and 30 September 2026, throughout France and for all types of production.

4. Example of a practical calculation

Let's assume that a lease has set the rent at €330 per hectare for 2023. Here is an illustrative update:

• 2024: application of the +5.23% variation:
  €330 × (122.55 / 116.46) ≈ €347.26

• 2025: application of the +0.42% variation:
  €347.26 × (123.06 / 122.55) ≈ €348.72

As a result, the rent per hectare for 2025 would be close to €348.72 excluding tax.

Summary table

Why is this development useful to understand?

1. Anticipation of agricultural rents: The index enables owners and farmers to carry out an annual review in line with economic trends, thus avoiding disputes.
2. 2. Balanced proportion: The system combines market data (RBEA) and general price trends (GDP), ensuring realistic updating.
3. 3. Limited impact this year: Whereas 2024 saw an exceptional jump, 2025 is characterised by a strong stabilisation, which facilitates budget forecasting.
4. 4. Regulatory transparency: Publication of the index via decree and official gazette guarantees uniform use throughout the country and for all products.

To find out more

• Index history since 2009 : 2025 at 123.06; 2024 at 122.55; 2023 at 116.46...

• Decree governing the index : decree no. 2010-1126 of 27 September 2010

• How do you calculate the rent?

In conclusion

The 2025 farm rent index, set at 123.06, is virtually stable after a jump in 2024. Its rigorous calculation, based 60% on RBEA and 40% on GDP, ensures that farm rents are updated in a balanced and transparent way. This year, the impact is moderate, but still necessary to reflect the real evolution of the agricultural context.