How to use Act IDs
Act IDs are designed to be simple to use. Reference them wherever you currently describe a financed activity — alongside your own language and descriptions.
The basic principle
You don't replace your existing language with an Act ID. You add the Act ID alongside your description — giving readers a standard reference they can use to compare, map, and classify, without changing how you communicate internally.
Think of it like an ISBN for a book. The book still has a title, an author, and a description. The ISBN is simply a stable, universal reference that makes the book unambiguous in any system.
Act IDs in practice
Eligible use of proceeds
Reference Act IDs in your eligible use-of-proceeds categories. Your own descriptions and eligibility criteria still apply — the Act ID is added as a standard reference in brackets or alongside.
4. Eligible Use of Proceeds — Renewable Energy
Net proceeds will be allocated to the following eligible activities:
- 4.1 Offshore wind electricity generation ACT-A-7K4M2Q
Construction, installation, and operation of offshore wind turbines and associated infrastructure. Minimum capacity threshold: 10 MW. - 4.2 Solar photovoltaic electricity generation ACT-A-3N8P5R
Development and operation of utility-scale and commercial solar PV facilities.
SPO annex or activity table
Include an activity mapping table in your SPO annex, linking the issuer's use-of-proceeds categories to Act IDs. This makes the opinion more parseable and provides investors with a direct reference.
| Issuer category | Act ID | Standard activity name | Mapping type |
|---|---|---|---|
| Offshore wind energy projects | ACT-A-7K4M2Q | Offshore wind electricity generation | Exact |
| Solar installations — utility and commercial | ACT-A-3N8P5R | Solar photovoltaic electricity generation | Exact |
| Urban metro and tram systems | ACT-A-9X2L6W | Electric passenger rail transport | Broader |
Internal holding records
Tag holding records with the Act ID for the financed activity. This lets you aggregate, compare, and report by activity across your labelled bond portfolio.
{
"bond_id": "XS1234567890",
"issuer": "Example Utilities Corp",
"bond_type": "green",
"allocation_date": "2025-06-30",
"activities": [
{
"act_id": "ACT-A-7K4M2Q",
"activity_name": "Offshore wind electricity generation",
"issuer_category": "Offshore wind energy projects",
"allocation_eur": 120000000,
"allocation_pct": 60.0
},
{
"act_id": "ACT-A-3N8P5R",
"activity_name": "Solar photovoltaic electricity generation",
"issuer_category": "Solar installations",
"allocation_eur": 80000000,
"allocation_pct": 40.0
}
]
} Structured data export
Include Act IDs in structured data exports, APIs, and flat files. This makes your data directly interoperable with any system that understands Act IDs — with no additional translation layer required.
isin,issuer,bond_type,act_id,activity_name,alloc_eur,alloc_pct,report_date XS1234567890,Example Corp A,green,ACT-A-7K4M2Q,Offshore wind electricity generation,120000000,60.0,2025-06-30 XS1234567890,Example Corp A,green,ACT-A-3N8P5R,Solar photovoltaic electricity generation,80000000,40.0,2025-06-30 XS2345678901,Example Corp B,green,ACT-A-7K4M2Q,Offshore wind electricity generation,200000000,100.0,2025-06-30
Allocation and impact reporting tables
Reference Act IDs in your allocation and impact reporting tables, alongside your impact indicators. This links your reported data to a standard activity reference for easy comparison across issuers and periods.
| Category | Act ID | Allocation | % of proceeds | Capacity (MW) |
|---|---|---|---|---|
| Offshore wind | ACT-A-7K4M2Q | €120m | 60% | 450 MW |
| Solar PV | ACT-A-3N8P5R | €80m | 40% | 220 MW |
| Total | — | €200m | 100% | 670 MW |
Where to find Act IDs
Browse the ACT-ID.io registry to find Act IDs for specific activities. You can search by name or browse by sector. Each record includes the Act ID, a description, associated criteria, mappings to external frameworks, and citations showing the provenance of the record.
If an activity you need is not yet in the registry, contact us. The registry is growing and we prioritise activities with active demand from the market.