Do No Significant Harm: The EU’s Next Major Environmental Principle?

The European Union may be approaching an important shift in environmental governance. Whether a coal-fired installation, a motorway, an irrigation system or an industrial investment can receive EU funding may increasingly depend on six words: do no significant harm.

The principle is not new. DNSH began as part of the EU Taxonomy’s framework for sustainable investment and subsequently entered several major funding instruments, including the Recovery and Resilience Facility, the Social Climate Fund, InvestEU and Cohesion policy. What is changing is its reach and institutional function.

For the 2028–2034 Multiannual Financial Framework, the Commission proposes to replace this fragmented landscape with a single set of DNSH criteria for the entire EU budget. A concept paper published on 15 July 2026 sets out the envisaged approach, with final guidance due by 1 January 2027.

The result could make DNSH one of the most consequential environmental governance tools of the next budget cycle. But calling it the EU’s next major environmental principle requires an important qualification.

A budgetary safeguard, not a new Treaty principle

DNSH does not occupy the same legal position as the environmental principles associated with Article 191 TFEU, such as precaution, prevention, rectification of environmental damage at source and polluter pays. Nor is it identical to the environmental integration obligation in Article 11 TFEU.

Its immediate legal function is more specific. Article 33 of the Financial Regulation places DNSH within sound financial management and performance: EU programmes and activities should, where feasible and appropriate, pursue their objectives without significantly harming the six environmental objectives identified by the Taxonomy Regulation.

Those objectives cover:

• Climate-change mitigation
• Climate-change adaptation
• Sustainable use and protection of water and marine resources
• The transition to a circular economy
• Pollution prevention and control
• Protection and restoration of biodiversity and ecosystems

DNSH is therefore best understood as a budgetary eligibility and programme-design rule. It does not generally prohibit an activity from taking place. It asks whether EU money should support it.

That distinction is crucial. A project may be lawful under environmental legislation and still raise a separate question about whether public finance should enable it.

How DNSH differs from neighbouring principles

The relationship between DNSH and established EU environmental principles becomes clearer when their timing and function are compared.

Precaution

The precautionary principle addresses decision-making under scientific uncertainty. It provides a basis for protective action where a potentially serious risk cannot yet be established with full scientific certainty.

DNSH is different. Its central question is not whether uncertain risk justifies intervention, but whether an activity falls within conditions that should exclude or constrain EU financial support.

Environmental integration

Article 11 TFEU requires environmental protection requirements to be integrated into the definition and implementation of Union policies. It is a broad mainstreaming obligation.

DNSH makes that logic operational within the budget. It translates environmental integration into intervention fields, eligibility conditions, carve-outs, assessments and funding decisions.

Polluter pays

The polluter-pays principle addresses the allocation of environmental costs: the party responsible for pollution should bear the cost of preventing, controlling and remedying it.

DNSH moves the decision upstream. Its question is not who pays after harm occurs, but whether public money should finance an activity associated with significant harm in the first place.

The principles can therefore reinforce one another, but they are not interchangeable. DNSH adds a distinct financial gatekeeping function.

From fragmented assessments to an exhaustive list

The Commission’s proposed model is designed around simplification.

Under the current budget, similar activities may face different DNSH criteria depending on the funding instrument. This has produced duplication, legal uncertainty and complex self-assessments. The new guidance would instead identify a limited and exhaustive list of activities that may cause significant harm unless they satisfy defined carve-out conditions.

The concept paper identifies 18 categories, covering areas such as:

• Fossil-fuel extraction, infrastructure and power generation
• Certain emissions-intensive industrial processes
• Fossil-fuel-capable vehicles, vessels and aircraft
• Road construction and airport development
• Fishing vessels and gear
• Landfills, mechanical biological treatment and waste incineration
• Deep-sea mining and marine geoengineering
• Barriers affecting free-flowing rivers
• Desalination and irrigation investments
• Manufacture or marketing of identified substances of very high concern

For intervention fields outside the specified list, DNSH would be regarded as automatically fulfilled. Within the list, targeted carve-outs would allow funding where defined safeguards are met.

This is a major methodological choice. Instead of asking every beneficiary to prove that an activity does no significant harm across all six objectives, the system would concentrate scrutiny on activities the guidance identifies as materially problematic.

Presumptions, carve-outs and exemptions

Several proposed mechanisms would reduce duplication.

An activity compliant with the EU Taxonomy’s substantial-contribution and DNSH technical screening criteria would be treated as DNSH-compliant for the next MFF. This avoids reassessing an activity that has already met the Taxonomy’s environmental standard.

The proposed CAP framework would also treat support subject to farm-stewardship conditions as compliant. Direct income interventions not linked to a specific project or investment, including certain payments to households and small farmers, could qualify through a proportionate approach.

The Commission also envisages circumstances in which applying DNSH would not be feasible or appropriate. These include crisis situations, overriding reasons of public interest, and defence and security. Properly defined, such exceptions can preserve the EU budget’s ability to respond to emergencies and strategic needs. Defined too broadly, however, they could weaken the consistency the common framework is intended to create.

The same tension appears in the carve-outs. Roads may qualify where accompanied by clean-mobility measures; certain irrigation investments may qualify where metering, water-body status and effective water savings are demonstrated; emissions-intensive industrial investments may qualify where they deliver substantial greenhouse-gas reductions under a credible decarbonisation plan.

The detail of these conditions will determine whether the new framework is genuinely selective or merely formal.

The difficult relationship with existing environmental law

One of the consultation’s most important questions concerns the baseline.

The Commission argues that DNSH should begin from the high level of protection already provided by EU environmental legislation. Repeating existing obligations would add administrative burden without necessarily adding environmental protection. The guidance should therefore impose additional safeguards only where EU funding creates a distinct need for them.

That is a coherent simplification argument. But it also exposes the central policy choice.

If DNSH requires no more than compliance with existing law, its added value as a funding safeguard may become limited. Environmental legislation often establishes minimum conditions for lawful activity; public investment can reasonably be expected to apply a more strategic test when allocating scarce resources.

Conversely, if DNSH becomes a parallel environmental authorisation regime, it may reproduce the complexity and uncertainty the Commission is trying to remove.

The better distinction is between duplicating legal compliance and protecting the integrity of public expenditure. DNSH need not repeat every permit condition. It should identify where financing an otherwise lawful activity would create long-term lock-in, undermine an environmental objective, or conflict materially with the strategic purpose of EU spending.

The implementation question

The practical significance of DNSH will depend on more than the wording of the 18 categories.

A single list can improve predictability, but only if intervention fields are mapped consistently across programmes. Carve-outs can support proportionality, but only if their evidence requirements are clear. Exceptions can preserve flexibility, but only if justifications are transparent and reviewable.

Responsibility will also vary by management mode. Member States will need to integrate DNSH assessments into their plans and maintain compliance during implementation. The Commission will oversee directly managed programmes, while indirect management will require reliable arrangements with implementing partners.

This turns DNSH into an administrative-capacity test as much as an environmental one. The framework must be simple enough to apply consistently, yet robust enough to influence real funding choices.

Simplification without hollowing out the principle

The Commission is attempting to make DNSH both simpler and more consequential.

That is possible. An exhaustive negative list, automatic compliance outside identified fields, recognition of Taxonomy alignment and targeted carve-outs could remove large amounts of low-value assessment. Concentrating scrutiny on activities with the greatest potential impact may improve environmental outcomes while reducing paperwork.

But simplification is not neutral. Every excluded category, carve-out and exemption distributes access to public finance. The final guidance will therefore reveal how the EU balances environmental integrity, competitiveness, strategic autonomy, crisis response and administrative feasibility.

If the balance is right, DNSH can become a disciplined rule for preventing EU funds from reinforcing environmental lock-in. If it is too weak, it will become symbolic. If it is too cumbersome, it will recreate the fragmented burden it was designed to replace.

The consultation remains open until 16 September 2026. The question is no longer whether DNSH will shape the next EU budget, but what level of environmental ambition that financial gatekeeping function should carry.

Sources

• European Commission concept paper on DNSH guidance for the MFF 2028–2034
• European Commission: Performance Regulation and DNSH consultation