What it means
Before taxonomies existed, any firm could describe a product or project as green with no agreed test behind the claim. A green taxonomy replaces that with a classification list: specific activities, each with measurable criteria that decide whether the activity qualifies.
The criteria are usually more demanding than they first appear. Under the best-known systems an activity must make a substantial contribution to an environmental objective, do no significant harm to the other objectives, and meet minimum social safeguards on matters such as labour rights.
For companies, the practical consequence is a reporting exercise. Large firms in the jurisdictions concerned must disclose what share of their revenue, capital expenditure and operating expenditure comes from taxonomy-aligned activities, which turns a definitional question into a set of numbers on a page.
The distinction between eligible and aligned trips up almost everyone. An activity is eligible if it appears on the list at all, and aligned only if it also meets the technical screening criteria, so a company can have high eligibility and very low alignment.
Taxonomies are not identical across the world, and several jurisdictions have built their own with different thresholds and different treatment of contested activities such as natural gas and nuclear power. Multinational groups therefore often report against more than one, and finance teams need to be clear about which rulebook a stated percentage refers to.
In practice
Real-world examples.
Example
A European asset manager screens a portfolio and finds that only 11% of the underlying revenue is taxonomy-aligned, which forces it to rename a fund that had been marketed on its environmental credentials.
Example
A utility discovers that its hydroelectric generation is eligible but not aligned, because a fish-passage requirement in the do-no-significant-harm criteria has not been met, and budgets $12,000,000 to fix it.
Example
A car maker reports 0% aligned revenue in the current year but 38% aligned capital expenditure, using the gap to show investors that its spending has already shifted to electric platforms even though its sales have not.
Think of it
“Green taxonomy is a classification of what counts as green-definitions for sustainable activities.
Formula
Calculation
Taxonomy alignment percentage = Revenue (or capital expenditure) from aligned activities / Total revenue (or total capital expenditure)
A building materials group reports total revenue of $800,000,000. Of that, $325,000,000 comes from activities that appear on the taxonomy list, making it taxonomy-eligible revenue. After applying the technical screening criteria, only $260,000,000 meets the emissions thresholds and the do-no-significant-harm tests, so aligned revenue is $260,000,000. The alignment ratio is $260,000,000 / $800,000,000 = 32.5% of total revenue, while the proportion of eligible revenue that is actually aligned is $260,000,000 / $325,000,000 = 80%. On the capital expenditure side the group spent $120,000,000 in the year, of which $54,000,000 went on aligned activities such as a low-carbon cement kiln, giving a capital expenditure alignment of $54,000,000 / $120,000,000 = 45%, a figure investors read as a signal of where the business is heading.Case study
Seen in the real world.
Vellamore Estates is an illustrative and fictional commercial landlord with 40 buildings and annual rental income of $220,000,000. Its marketing has described the portfolio as a sustainable property platform for years, based on a scattering of certifications.
When taxonomy reporting becomes mandatory for the group, the finance team runs the criteria building by building. Almost all the rental income is eligible, since owning and letting real estate is a listed activity, but only 14 buildings meet the energy performance threshold, giving aligned revenue of $77,000,000, or 35% of the total.
The board's first reaction in this fictional account is to bury the number. The chief financial officer argues the opposite: publish the 35%, publish the retrofit plan and the capital expenditure alignment behind it, and let investors judge the direction of travel. The illustrative point is that a taxonomy turns a vague reputation into a specific figure, and the only durable response is to move the figure.
Watch out
Common mistakes.
- Quoting eligibility figures as if they were alignment. Eligibility only means the activity is on the list, while alignment means it passes the technical tests, and the two numbers can differ enormously.
- Assuming a low alignment percentage means a bad company. Many worthwhile activities, including most services and much of manufacturing, are simply not covered by the current lists.
- Treating one jurisdiction's taxonomy as universal. Thresholds and the treatment of activities such as gas-fired power differ between systems, so a percentage is meaningless without saying which rulebook produced it.
Questions
People also ask.
Does a green taxonomy ban anything?
No. It is a classification and disclosure tool, not a prohibition, though it strongly influences where investment money flows.
Who has to report against one?
Typically large listed companies and financial institutions in jurisdictions that have adopted a taxonomy, with smaller firms often drawn in indirectly by lenders and customers.
What does do no significant harm mean?
An activity that helps one environmental objective must not seriously damage the others, so a low-carbon project that pollutes water heavily would fail the test.
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