In most industrial companies covered by the European carbon market, EU ETS compliance still runs on a hybrid architecture: operational data sits in the ERP, allowance management lives in a spreadsheet, and the emissions report is produced by an external consultant. This fragmentation splits accountability, multiplies error risk, and makes forward-looking carbon cost simulation virtually impossible.
Since 2024, the stakes have fundamentally changed. The EU ETS Phase 4 linear reduction factor was raised to 4.3% per year for 2024–2027, up from 2.2% in the previous phase. Free allowances for sectors covered by the Carbon Border Adjustment Mechanism (CBAM) are shrinking each year. And EUA prices fluctuated between €66 and €90 per tonne in Q1 2026 (cbamguide.com). For a facility emitting 150,000 tCO2 per year, every €1 move in EUA price represents €150,000 of financial exposure.
The ERP is no longer optional in this context. It is the only system capable of centralising production, energy, and consumption data in real time — and connecting it to the regulatory cycle of monitoring, reporting, and surrendering allowances.
EU ETS Phase 4 in 2026: What Has Actually Changed
A Cap Tightening Twice as Fast
Phase 4 of the EU ETS covers the period 2021–2030. It is governed by the directive revised in 2023, which hardened the reduction trajectory to achieve a 62% cut in emissions by 2030 relative to 2005 levels.
Two mechanisms were combined to achieve this. First, the Linear Reduction Factor (LRF) was raised from 2.2% to 4.3% for 2024–2027, then to 4.4% from 2028. Second, two one-off cap reductions (“rebasings”) were scheduled: 90 million allowances were withdrawn from the market in 2024, and a further 27 million in 2026.
The result: a 2026 cap set at 1,185 Mt CO2e, down significantly from Phase 3 levels.
EUA Prices in 2026 and Their Direct Financial Impact
EUA allowances saw significant volatility in 2026. The official weighted price for Q1 2026 — the figure used to calculate CBAM certificates — settled at €75.36 per tonne of CO2. Over the quarter, auction prices ranged between €66 and €90. In Q2, the average stabilised around €75.28.
These price ranges are not academic for a finance team. A company that has not hedged its carbon exposure before the start of the financial year bears the full weight of market volatility. An ERP that tracks the allowance position in real time enables EUA purchases or sales to be triggered at the right moment, in sync with treasury management.
The Phase-Out of Free Allowances for CBAM Sectors
Since 1 January 2026, companies in sectors covered by the Carbon Border Adjustment Mechanism (CBAM) have seen their free allowances reduced on a progressive schedule. In 2026, the share of obligations that must be covered by purchased allowances reaches 2.5% of total exposure. This percentage rises each year until 2034, when free allowances disappear entirely for these sectors.
In practice: a steel mill, cement producer, or aluminium smelter that previously relied on free allowances to cover all its emissions must now budget an increasing “carbon allowance purchases” line — running into tens of millions of euros by 2030.
The Penalty: €100 per Surplus Tonne, No Discount
The sanction for exceeding your surrender obligation remains unchanged: €100 per excess tonne of CO2, plus mandatory surrender of the missing allowances. Paying the fine does not waive the surrender requirement. For the 2026 compliance campaign, the effective penalty was estimated at approximately €118 per tonne once late-payment interest was factored in.
The ETS Compliance Cycle: 4 Annual Milestones Your ERP Must Own
EU ETS compliance is not a one-off event. It follows a rigid annual cycle that the ERP should treat as a first-class process — on a par with the financial year-end close.
1. The Monitoring Plan (permanent)
Every installation subject to EU ETS must maintain a monitoring plan approved by the relevant national competent authority (NCA). This plan defines precisely how emissions must be measured: via calculation from fuel consumption data, via direct stack measurement, or via a mixed approach. Any change to the industrial process that affects emissions may require the plan to be revised and re-approved.
2. The Annual Emissions Report (31 March)
Before 31 March each year, the operator must submit a detailed report of the installation’s verified emissions for the previous year to the competent authority. This report is built from ERP monitoring data: fuel consumption, process data, meter readings.
3. Independent Verification (before end of March)
The emissions report must be verified by an accredited independent body before submission. The auditor relies on the source data held in the ERP. An unverified report is not accepted by the authority.
4. Allowance Surrender (30 September)
The surrender of allowances matching verified emissions for the previous year must occur before 30 September. This is the date when the carbon cost crystallises in the company’s accounts. Allowances are transferred from the operator’s account to the Commission’s account via the EU Transaction Log (EUTL) — the Union Registry.
4 ERP Workstreams for Structured EU ETS Management
Workstream 1: Energy and Asset Module as the MRV Data Source
Monitoring, Reporting and Verification (MRV) is the backbone of EU ETS compliance. It depends on accurate, timestamped, traceable consumption data. That data already exists in the ERP: gas and electricity meter readings in the asset management module, energy supplier invoice lines in the procurement module, process consumption in the production management module.
The work to do: build an emission factor nomenclature in the ERP tied to each energy vector (natural gas, heating oil, coal, coke, propane), then configure automatic CO2 emission calculations from consumption volumes. This calculation must exactly reproduce the methodology defined in your approved monitoring plan.
For refrigerants and chemical-process emissions (lime kilns, calcination reactions), a specific configuration is needed: these process emissions are not linked to a measurable energy invoice, but to production orders or maintenance intervention reports.
Workstream 2: Allowance Accounting and Position Management
An EU ETS allowance account works like a currency account: it has a balance, receives credits (free allocations, market purchases), and produces debits (surrenders, sales). Managing this “carbon portfolio” must be embedded in the ERP’s general ledger.
Credits to model in the ERP:
- Annual free allocations notified by the competent authority (at the start of the year)
- EUA purchases on the secondary market or at auction (price, date, counterparty)
- Inbound transfers from other installations within the same group
Debits to model:
- Annual surrender on 30 September (quantity = verified emissions for year N-1)
- EUA sales when the position is long (price, date, gain or loss)
Allowance stock valuation typically follows FIFO or weighted average cost, depending on the accounting treatment chosen (IAS 38 or the net liability method). The ERP must allow the selected method to be applied consistently over time.
Workstream 3: Connectivity with the Union Registry (EUTL)
The EU Transaction Log (EUTL) is the centralised registry through which all EU ETS allowance movements pass. Each transaction — purchase, sale, surrender, transfer — is recorded in the EUTL with a unique identifier and timestamp. Access to the registry is managed through each member state’s national administrator.
EUTL integration with the ERP can be achieved via API (for modern systems) or through transaction file imports/exports. The goal is to eliminate manual double-entry and ensure automatic reconciliation between the ERP allowance ledger and the actual position in the registry.
This connectivity is especially critical during the surrender window: any error in surrendered quantities or in the target installation identifier can trigger a registry rejection — and a breach of the 30 September deadline.
Workstream 4: Carbon Cost Simulation and Budget Integration
The real value of the ERP in EU ETS management is not post-hoc compliance — it is forward-looking anticipation. A well-configured ERP can calculate the projected carbon position in real time: expected emissions based on the production plan, available allowances, current EUA market price, and estimated compliance cost at 30 September.
This simulation feeds directly into budgeting and treasury management. It allows finance teams to answer concrete questions: should we buy allowances now at €75 or wait for prices to drop? What is the carbon impact of a 15% production increase? What would a switch from natural gas to biomass cost in carbon terms for a given kiln?
The ERP’s Business Intelligence modules — dashboards, scenario modelling — are the right tools for building these analyses. The prerequisite: consumption data and emission factors must be reliable and automated.
ETS2 in 2027: Build Now or Pay Later
The “classic” EU ETS covers only large industrial installations (approximately 10,500 across Europe). From 2027, a second system comes into force: ETS2, which extends the cap-and-trade principle to fossil fuels used in buildings, road transport, and small industrial installations not covered by ETS1.
The ETS2 timeline has two critical milestones:
- Regulated entities (in practice: fuel distributors) must have an operational monitoring plan in place before 31 December 2025. For companies distributing heating oil or non-road diesel to business customers, this obligation is already active.
- The first ETS2 allowance surrender is scheduled for 31 May 2028, covering emissions from the 2027 financial year.
For diversified industrial groups whose activities fell outside ETS1 (internal transport, warehouse heating, small sites), ETS2 means extending the carbon management perimeter in the ERP. The processes already built for ETS1 — MRV, position management, registry connectivity — can be reused, provided they were designed modularly from the outset.
For fuel distribution SMEs, this is an entirely new project: they have no ETS1 precedent and must build their carbon monitoring and reporting framework from scratch — either in their ERP or their commercial management system.
What SAP, IFS, and Mid-Market ERPs Offer
Among the major vendors, SAP provides a two-module combination for EU ETS management: SAP Sustainability Footprint Management (emission calculations per installation, per production order, per energy vector) and SAP Green Ledger (allowance accounting, position management, integration into the financial close). The two modules are interconnected, and SAP supports carbon budget planning alongside treasury integration.
For mid-market ERPs (Sage, UNIT4, Access Group), specialist connectors exist to feed external ETS reporting tools (such as ETSManager or RegistryLink) from ERP consumption data. This architecture is less integrated than the SAP approach, but faster to deploy and better suited to mid-sized manufacturers that do not justify a full Sustainability module.
For heavily exposed industrial sectors (steel, cement, refining, aluminium), sector-specific ERPs such as IFS Cloud and Infor CloudSuite Industrial include energy management modules with native emission factor configuration and MRV export formats recognised by national competent authorities.
Whichever vendor you choose, the critical constraint is the same: the quality of consumption data in the ERP. Even the best-designed carbon compliance module cannot compensate for non-automated meter readings or energy invoices keyed in manually weeks after the fact. The reliability of an EU ETS declaration starts with the discipline of operational data.
Key Takeaways
EU ETS Phase 4 has entered its active tightening phase: the cap is falling, EUA prices hover around €75, free allowances are eroding for CBAM sectors, and ETS2 adds a new layer from 2027. For industrial operators, carbon allowance management has become a first-order financial line item, with an annual compliance cycle governed by non-negotiable deadlines.
The ERP is the right tool to structure this management — provided you have tackled the four key workstreams: a reliable MRV data source, integrated allowance accounting, Union Registry connectivity, and carbon cost budget simulation. Companies that do this work now gain a lasting forecasting advantage over those that wait until year-end to discover their position.
To go further, see our guide on Scope 1, 2, 3 carbon accounting in ERP, which covers the complementary GHG Protocol obligations that sit alongside EU ETS for companies that need to report full value-chain emissions.
