Standard activity IDs
for sustainable bonds
ACT-ID.io helps issuers, banks, SPO providers, investors, and vendors identify and compare the activities financed by labelled bonds.
The same ACT-U, every step of the way
A single financed action — say a wind farm — can be named once and referenced identically from the underlying project all the way to a bond investor's quarterly impact report.
ACT-U-W4G2UF Wind power generation ACT-U-W4G2UF Wind power generation ACT-U-W4G2UF Wind power generation ACT-U-W4G2UF Wind power generation The payoff: the investor's "how much of my labelled-bond portfolio is financing wind?" query becomes a group-by-ACT-U sum, working identically whether the bond is from Singapore, Germany, or Brazil — as long as every participant in the chain speaks ACT-U.
What is a financed activity?
A use-of-proceeds is the specific, financeable thing a bond's capital pays for — "construction of offshore wind generation", "retrofit of existing buildings to high energy-efficiency standards", "installation of early-warning systems for extreme heat events."
Use-of-proceeds is the atomic unit of the registry: each gets a stable
ACT-U-XXXXXX identifier and is what bond frameworks, SPO opinions, and
investor reports ultimately reference. An economic activity layer (ACT-A-,
ISIC/NACE-aligned) sits beneath it as producer-side classification — one economic
activity, many use-of-proceeds framings.
Use-of-proceeds are the common link across issuances globally. A green bond issued in Singapore and one issued in Germany may use different taxonomies, different languages, and different frameworks — but both can reference the same ACT-U. That's what makes use-of-proceeds the right layer to standardise.
A note on the word "activity": most existing taxonomies
(EU Taxonomy, CBRT, ASEAN, and others) publish lists they call "activities" —
but the entries are typically verb-phrases describing what proceeds can finance,
not producer-side industry classification. In ACT-ID's terminology those are
use-of-proceeds (ACT-U). True economic-activity classification
(ISIC / NACE sectors) lives on the ACT-A layer beneath.
Read the full explanation →
Financed activities are described inconsistently
Across bond frameworks, SPO opinions, investor systems, and datasets, the same financed activity gets described in dozens of different ways.
"Offshore wind", "offshore wind generation", "offshore wind farm construction", "wind energy (offshore)" — all meaning the same thing, but written differently by every issuer, every SPO, and every data provider.
This inconsistency makes it harder to compare transactions, map frameworks to taxonomies, build reliable datasets, and report clearly to investors.
Without a shared reference, every comparison requires manual interpretation.
SPOs, investors, and data vendors each build their own mapping tables.
The same transaction is classified differently across providers.
What the shared vocabulary delivers at each link in the chain
The same ACT-U pays off differently for each participant — clearer disclosure upstream, compatible roll-up in the middle, consistent aggregation downstream.
Clear allocation for issuers
List the specific use-of-proceeds your labelled issuance will allocate to, using standard ACT-U identifiers. One bond, one unambiguous list — the same list that SPO providers verify and investors report against.
Compatible roll-up for banks
When borrowers describe their investments in ACT-Us, the loan book rolls up into the same vocabulary the bank's bond issuances use. The financing chain — from underlying project, through the loan book, into a bond — stays traceable end-to-end.
Portfolio consistency for investors
Aggregate financed use-of-proceeds across every holding, regardless of
issuer, market, or framework. What used to be bespoke SPO-to-SPO mapping
becomes a simple SUM() by ACT-U.
One registry. Every taxonomy.
Activities in labelled bonds
In labelled bonds — green, social, sustainability — issuers commit to allocating proceeds to eligible economic activities. These activities are defined by taxonomies (EU Taxonomy, national taxonomies) and referenced in bond frameworks.
ICMA Green Bond Principles and the EU Green Bond Standard (EU GBS) require clear identification of financed activities. But there is no standard way to reference them across issuers, frameworks, and data systems.
ACT-ID provides the missing standard identifier layer — making activities trackable, comparable, and machine-readable across frameworks.
The name "ACT-ID"
The name "ACT-ID" is a play on words — combining "act" (to take action) with "Activity ID." Every labelled bond finances specific economic activities, and ACT-ID gives each one a standard identifier.
Built for every participant in the bond market
Issuers
Reference Act IDs in your framework and allocation reporting for clarity and comparability.
Learn more →Banks & Arrangers
Standardise activity references across transactions and improve internal mapping.
Learn more →SPO Providers
Reference Act IDs in opinions for consistent activity identification across issuers.
Learn more →Investors
Tag holdings and compare financed activities across issuers with a shared reference.
Learn more →Data & Software Vendors
Integrate Act IDs to improve interoperability and reduce bespoke mapping work.
Learn more →One use-of-proceeds. One identifier. Used everywhere.
Sector: Energy • Hash-derived identifier • Version 1
"Eligible Use of Proceeds: Electricity generation from wind power (ACT-U-W4G2UF)" "Use-of-proceeds confirmed as ACT-U-W4G2UF — Electricity generation from wind power" { "act_id": "ACT-U-W4G2UF", "allocation_pct": 42.5 } isin,act_id,name
XS1234567890,ACT-U-W4G2UF,Offshore wind Three steps to clearer activity identification
Find the activity
Search the ACT-ID.io registry for the activity that matches what is being financed. Browse by sector or search by name.
Browse the registry →Use the Act ID
Reference the Act ID in your bond framework, SPO annex, investor system, data feed, or reporting table.
See usage examples →Compare and map
Because everyone references the same ID, comparison across transactions and mapping to frameworks becomes straightforward.
Read the methodology →ACT-ID in the real world
XframeworkID carries ACT-ID references on bond frameworks and Second Party Opinions in the green bond market. On each document's profile page, the eligible use-of-proceeds are tagged with their ACT-U identifiers — so an analyst can aggregate financed activities across issuers, frameworks, and jurisdictions in a single view. Tags shown are only those with textual evidence in the source document; loose matches are set aside for review. Coverage as of 2026-04-24.
Free to use — no licence required
Issuers, banks, SPO providers, investors, researchers, and regulators can use Act IDs freely — cite them in disclosures, tag them in internal systems, include them in reports. Registry data is published under CC-BY 4.0 (attribution to act-id.io).
A vendor licence is only needed when data or software vendors re-distribute Act IDs in a commercial product — datasets, analytics platforms, API services. That licence supports the registry's ongoing maintenance.