Data Provision for FTSE International Ltd.

This page contains the internal information for FTSE International. It supports the licensing and collaboration between FTSE International and Global Footprint Network for the time period of February 1, 2026 to January 31, 2027.

The data sheet contains the information for each country (with time series that may go back for some countries till 1961) on:

• date of country overshoot day (they are explained here),
• population size,
• per capita footprint of consumption,
• per capital biocapacity, and
• days in the year until the country reaches its overshoot day or its deficit day. If the number is bigger than the number of days in the year, then no date is shown.

Only data are included that reach a sufficiently high quality score. Quality scores are explained here.

To download the file with the 2025 edition results of the Country Overshoot Days, click here.

This year, as part of this collaboration, FTSE also has access to 16 hours of scientific, technical, methodological, or interpretation support available from Global Footprint Network. Use so far:

March 24, 2026, 0.75 hours (answering tech questions)
March 26, 2026 0.5 hours (answering tech questions)
March 27, 2026 0.25 hours (making tech answers available)

Total                 1.5 hours

 

Interpretation

The significance of the biocapacity lens is explained here.

The link of such information to investments is outlined here.

A map of country data is available on Global Footprint Network’s data platform.

Relevant papers

Wackernagel, M., Hanscom, L., Jayasinghe, P., Lin, D., Murthy, A., Neill, E., Raven, P., 2021. The importance of resource security for poverty eradication. Nature Sustainability. Volume 4, pages731–738. https://doi.org/10.1038/s41893-021-00708-4. Plus supplementary information. Summaries are available in the Global Footprint Network blog and this press release.

Wackernagel, M., Lin, D., Evans, M., Hanscom, L., Raven, P., 2019. Defying the Footprint Oracle: Implications of Country Resource Trends. Sustainability, Volume 11 Issue 7, 2164, https://doi.org/10.3390/su11072164.

Borucke M, Moore D, Cranston G, Gracey K, Iha K, Larson J, Lazarus E, Morales JC, Wackernagel M, Galli A. 2013. Accounting for demand and supply of the Biosphere’s regenerative capacity: the National Footprint Accounts’ underlying methodology and framework. Ecological Indicators, 24, 518-533.

Contact

For questions, please email both Dr. Mathis Wackernagel (mathis.wackernagel@footprintnetwork.org) and Dr. David Lin (david.lin@footprintnetwork.org)

 

Questions and Answers on the Country Overshoot Day Data

1. Which dataset edition does this file correspond to?

The data provided correspond to the 2025 edition of the National Footprint and Biocapacity Accounts, released on April 22, 2025.

The next edition—the 2026 release—is expected on April 22, 2026.

All Country Overshoot Day estimates currently shared for 2026 are therefore based on calculations from the 2025 edition of the Accounts.

 

2. Is there a time lag in the data?

Yes. Most data in the National Footprint Accounts have at least a one-year lag, and typically more for fully complete datasets.

For example, in the 2025 edition:

• 2022 is the most recent year with complete underlying data.
• 2023 and 2024 are partially estimated using extrapolations and incomplete data sources.

Because of this structure, the most recent years always contain some level of estimation.

 

3. Why do data values differ from earlier publications (such as AXA Climate’s 2022 dataset)?

Each annual edition of the National Footprint and Biocapacity Accounts recalculates the entire historical dataset, not only the newest years.

This full recalculation is necessary to maintain internal consistency and reflects several ongoing updates, including:

• Revisions to historical data by UN statistical agencies
• Updates to international classifications
• Improvements in scientific understanding and modeling methods

These changes are documented in the annual Release Notes.

As a result, values in the 2025 edition may differ from those published in earlier versions, such as the 2022 edition referenced by AXA Climate. These revisions ensure the dataset remains scientifically consistent over time.

It is also important to note that the overall precision of the estimates is limited, so even a difference of about 10 days in Overshoot Day calculations can fall within the expected uncertainty range.

 

4. Why does the dataset not include a value for the Netherlands?

All calculated results undergo quality control checks before publication.

If a result shows significant anomalies or implausible values, it may be temporarily excluded from the dataset until further investigation is completed.

Global Footprint Network’s quality assurance approach is described in the report:

“Scoring Output Data Quality of the NFBA.”

This publication is available on the Global Footprint Network publications page.

 

5. Will new datasets be released every year on April 22?

Yes. The intention is to publish a new official edition of the dataset each year on April 22, stewarded by FoDaFo..

This annual release serves as the reference dataset for that year, enabling the calculation and recalculation of Country Overshoot Days and related indicators.

 

6. Will the latest data be shared at the time of each release?

Yes. Coordination is planned so that updated datasets can be shared around the time of each annual release (April 22).

One possible approach is to provide two download links:

• one for the current edition
• one for the previous edition, so users can retain access even after the newer dataset replaces it.

 

7. Why are some recent years estimated?

The most recent years always contain partial data because:

• Official international datasets take time to compile.
• Some inputs, such as trade data, arrive with delays.

Therefore, recent years include extrapolations and estimates that are refined in later editions.

Because trends in ecological footprint indicators change relatively slowly, these estimates are typically reasonably stable, though small revisions may occur in later releases.

 

8. How are Country Overshoot Days calculated for a current year (e.g., 2026)?

When Country Overshoot Days are calculated before January 1 of a given year, they rely on the most recent available dataset.

For example:

• Country Overshoot Days for 2026 are calculated using 2024 estimates from the 2025 edition of the Accounts.

The dates correspond to the actual calendar year (2026), but the underlying ecological footprint data come from the most recent dataset available at the time.

The 2026 edition, released in April 2026, will incorporate updated data and may slightly revise these calculations.

 

9. Why is Earth Overshoot Day often more stable than country-level results?

The global Earth Overshoot Day tends to be more robust than country results because it does not rely on international trade data, which are among the most noisy and uncertain inputs in the Footprint Accounts.

Country results, by contrast, are more sensitive to trade statistics and other country-level data revisions.