France Real Rent Reference Index: Inflation-Adjusted IRL Since 2002

The France real rent reference index is an Eco3min composite: the IRL, the only index French law allows for revising residential rents, divided by the national consumer price index and rebased to 100 = 2015 annual average. Quarterly from the fourth quarter of 2002, 95 observations. It answers a question the nominal IRL cannot: whether a legally indexed rent has kept its purchasing power. It has not. The real index stands at 95.6, close to its all-time low and 5.7 points below its 2009 peak.

Dataset: France Real Rent Reference Index (2002–2026) · Updated 2026-04-01

Source: INSEE (IRL and consumer price index) · Eco3min composite, base 100 = 2015

Macro Takeaway

Construction & Components

The composite removes general inflation from the legal rent index, leaving only the movement of indexed rents relative to consumer prices. It measures the cumulative cost of the smoothing built into the IRL formula.

Formula:

Real Rent Index = IRL / Consumer price index, rebased to 100 = 2015

Components:

• Rent reference index (IRL) — INSEE, dataset IRL — quarterly, metropolitan France, base 100 at Q4 1998. The numerator, itself derived from a twelve-month moving average of consumer prices excluding tobacco and rents.
• Consumer price index — INSEE, IPC datasets — monthly, all households, whole of France. The deflator, chained across the 2015 and 2025 bases over 360 overlapping months.

Frequency reconciliation: The IRL is quarterly and the consumer price index monthly. The pipeline aligns them with a backward as-of merge, so each quarter is deflated by the price index of its first month rather than a quarterly average. Reconciling two frequencies means knowing the publication step of each, which the release timetable for INSEE indices sets index by index.

Coverage: Fourth quarter 2002 to second quarter 2026, bounded by the start of the IRL series.

Dataset Overview

Dataset Variables

The CSV, Excel and JSON files contain the following columns.

Column names match the CSV headers exactly.

Download the Complete Dataset

The full real rent reference index series, including both components, is available in CSV and Excel formats.

Direct Data Access

INSEE publishes both components but not their ratio. The Eco3min structured dataset returns the composite and both inputs on one quarterly grid:

Direct CSV Access — Eco3min Structured Dataset

https://eco3min.fr/dataset/fr/fr-real-rent-index.csv

This URL returns the complete dataset in CSV format. It can be used directly in pandas, R, curl, or any data tool. JSON and XLSX are available at the same path with the corresponding extension.

Using the Dataset in Python

import pandas as pd

url = "https://eco3min.fr/dataset/fr/fr-real-rent-index.csv"
df = pd.read_csv(url, parse_dates=["date"])

print(df.head())
print(df["real_rent_index"].describe())

Using the Dataset in R

library(readr)

url <- "https://eco3min.fr/dataset/fr/fr-real-rent-index.csv"
df <- read_csv(url)

head(df)
summary(df$real_rent_index)

Both examples load the dataset directly from the URL — no download or API key required.

Methodology

The composite is recomputed daily by an Eco3min pipeline. The consumer price index is chained across INSEE base 2015 and base 2025 over a 360-month overlap before the division, so no break appears at the rebasing date. On a single amount rather than a rent index, the same deflation by French prices is what our INSEE purchasing-power coefficients tool applies.

The monthly consumer price index is aligned onto the quarterly IRL grid with a backward as-of merge, so each quarter is deflated by the price index of its first month. One methodological caution: the IRL is itself derived from a consumer price index, so this composite divides a smoothed price measure by a raw one. The result is a measure of the lag introduced by the smoothing, not an independent price comparison.

Data Quality & Provider Notes

Latency follows the IRL, published about ten days after the end of the reference quarter. The price component is always ahead.

Revisions propagate from the price side: INSEE revises the consumer price index between provisional and definitive publication, and the chaining factor is recomputed at each run.

No native alternative exists. Neither INSEE nor any commercial provider publishes a deflated IRL as a series.

What This Index Captures (And What It Doesn’t)

The composite is a structural measure of the purchasing power of legally indexed rents. It is not a measure of market rents and not a measure of housing affordability.

What it captures:

• The cumulative cost of the IRL’s twelve-month smoothing across periods of rising and falling inflation
• The combined effect of the smoothing and the 2022-2024 statutory rent cap
• Comparability of rent indexation policy across very different inflation regimes

What it does NOT capture (common misinterpretations):

• Market rents. The IRL governs revisions of existing leases only. New leases are priced freely outside rent-control zones, and market rents in tight cities have risen far faster than the IRL.
• What landlords actually receive. Revision is a right, not an obligation, and many leases are revised late or not at all. The index measures the legal ceiling on indexation, not realised rent.
• Affordability. Deflating by consumer prices is not dividing by tenant income. A falling real IRL is compatible with rents becoming less affordable if incomes fall faster.
• An independent price comparison. The IRL is itself built from a consumer price index. This composite divides a smoothed price measure by a raw one, so it measures a lag rather than a genuine relative price.

The series is most useful for quantifying how much purchasing power the IRL’s smoothing costs over long horizons, read alongside its two component columns.

Historical Regimes

• 2002–2008 — roughly flat in real terms. The index moves from 101.1 to around 100, with rents and prices rising at similar pace. The IRL had only existed since 2005; the earlier part is a backcast.
• 2009 — the series high. The index peaks at 101.3 in January 2009. Consumer prices had fallen sharply with oil while the twelve-month moving average kept the IRL elevated — the smoothing working in landlords’ favour for once.
• 2010–2019 — the slow erosion. From roughly 101 to 99.52 by January 2020. With inflation near 1%, the lag cost little each year but accumulated steadily.
• 2021–2023 — the inflation gap. Down to 97.53 by the second quarter of 2022 and to the series low of 95.33 in April 2023. The moving average and the 3.5% statutory cap both held the nominal index below prices.
• 2024–2026 — a partial and incomplete recovery. Up to 96.47 by early 2025, then back to 95.59 by the second quarter of 2026. Three years after the peak of inflation, the real index has recovered less than half a point from its low.

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Macroeconomic Dataset Hub

This dataset is part of the Eco3min macro-financial data repository.

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Sources

• INSEE — rent reference index (IRL), metropolitan France, dataset IRL, and consumer price index, datasets IPC-2015 and IPC-2025.
• Composite computed by Eco3min from the two series above.
• Reuse: INSEE public statistics may be reused, including commercially, subject to acknowledgement of the source and preservation of the integrity of the information.

Dataset Reference

Eco3min Research. (2026). France Real Rent Reference Index (2002–2026). Eco3min composite from INSEE data.<br> https://eco3min.fr/en/france-real-rent-index-dataset/