1. Introduction

Hydrogen production—particularly green hydrogen produced by electrolysis using low-carbon electricity—often faces a significant cost disadvantage compared with conventional fossil-fuel-based hydrogen and competing fuels. The principal legal and economic difficulty is therefore not simply how to authorize hydrogen production, but how to create a sufficiently predictable revenue stream to make large capital investments financeable.

Governments increasingly address this problem through subsidies, production incentives, contracts for difference (CfD)-type mechanisms, tax incentives, grants, and long-term offtake contracts.

A hydrogen CfD-type mechanism generally provides a producer with a contractual payment that compensates, wholly or partly, for the difference between:

the cost or agreed strike price of low-carbon hydrogen; and

a market-based reference price representing the value obtainable from hydrogen or a competing fuel.

The UK's Hydrogen Production Business Model (HPBM) is an important example. It provides revenue support through a private-law Low Carbon Hydrogen Agreement (LCHA) between the hydrogen producer and the government-appointed counterparty, the Low Carbon Contracts Company (LCCC). (GOV.UK)

2. Why Hydrogen Requires Subsidy Support

Hydrogen markets differ from mature electricity markets in several important respects.

A. High production costs

Green hydrogen requires:

electrolyser investment;

electricity procurement;

water treatment;

compression and storage;

transport infrastructure; and

certification and compliance systems.

The resulting hydrogen price may exceed the price that industrial users are willing to pay.

B. Immature demand

Hydrogen demand is developing in sectors such as:

steel;

chemicals;

refining;

heavy transport;

shipping;

aviation fuels;

power generation; and

industrial heating.

Because long-term demand is uncertain, lenders may be unwilling to finance projects without predictable revenue.

C. Price volatility

Hydrogen producers can face substantial fluctuations in electricity costs and competing-fuel prices. A long-term support contract can reduce this risk.

D. Carbon externality

Where fossil fuels do not fully internalise their environmental costs, low-carbon hydrogen can face an artificial price disadvantage. Subsidies may therefore be designed to correct this market failure.

3. Meaning of a Hydrogen CfD-Type Scheme

A conventional electricity CfD generally guarantees a generator a contractual strike price. Where the market reference price is below the strike price, the counterparty pays the difference.

The UK's electricity CfD scheme is structured around a long-term private-law contract between a low-carbon generator and LCCC. (GOV.UK)

A hydrogen CfD-type mechanism applies the same broad economic principle but must account for the special characteristics of hydrogen.

The simplified structure is:

Hydrogen production cost → Strike price → Reference price → Variable support payment

For example, if:

strike price = £X/kg hydrogen

reference price = £Y/kg hydrogen

and X > Y, the producer receives a support payment representing the relevant difference, subject to the contractual formula.

The actual hydrogen schemes can be substantially more complicated because they may incorporate production volumes, sales, eligible offtakers, gas or electricity prices, carbon prices and other contractual variables.

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The economic purpose is to reduce revenue uncertainty rather than simply give an unrestricted grant.

4. UK Hydrogen Production Business Model

The UK's HPBM is one of the clearest examples of a CfD-type hydrogen support mechanism.

The government states that Hydrogen Allocation Rounds provide revenue support through the HPBM and that successful projects enter into an LCHA. The support is intended to overcome the operating-cost gap between low-carbon hydrogen and higher-carbon counterfactual fuels. (GOV.UK)

Main characteristics

The model includes:

competitive allocation;

long-term contractual support;

a government-appointed counterparty;

project eligibility requirements;

hydrogen quality and carbon-intensity requirements;

payment calculations;

production and sales conditions; and

contractual monitoring and compliance.

The first Hydrogen Allocation Round selected 11 projects with a combined capacity of 125 MW and provided more than £2 billion of revenue support, alongside more than £90 million of capital support through the Net Zero Hydrogen Fund. (GOV.UK)

5. Price Support and Volume Support

An important innovation of the UK HPBM is that support is not limited to a conventional price difference.

The government's description of the model identifies two principal forms of support.

A. Price support

The producer receives a variable premium based upon the difference between the contractual strike price and the relevant reference price.

The purpose is to compensate for the fact that low-carbon hydrogen may cost more than the competing fuel.

B. Volume support

Hydrogen projects may face a problem even where the price is attractive: there may not be enough customers.

The HPBM therefore incorporates volume-related support. The CMA's description of the scheme explains that the subsidy per unit can increase where hydrogen sales fall, using a sliding-scale mechanism. (GOV.UK)

This is legally significant because it shows that hydrogen CfD-type support is not necessarily a simple price guarantee.

It is better understood as a revenue-support architecture combining:

price-risk allocation + demand-risk allocation + investment-risk reduction.

6. Legal Foundation in the United Kingdom

The statutory foundation has been strengthened by the Energy Act 2023.

Section 76 provides for regulations concerning the allocation of hydrogen-production revenue-support contracts. It permits the creation of allocation frameworks and different allocation rounds. (Legislation.gov.uk)

This creates a legal structure consisting broadly of:

Primary legislation → Regulations → Allocation framework → Competitive allocation → Individual LCHA → Payment and enforcement

This hierarchy is important because government support cannot simply operate as an informal political promise. Investors require legally enforceable contractual rights and clearly defined administrative rules.

7. Competitive Allocation and Subsidy Control

A central legal issue is how governments select projects without creating arbitrary or discriminatory advantages.

Competitive allocation can involve:

eligibility screening;

technical assessment;

financial assessment;

cost assurance;

price or value-for-money assessment;

due diligence;

final offers; and

contractual negotiation.

The UK has also subjected major energy subsidy schemes to scrutiny under the Subsidy Control Act 2022 framework.

For example, the CMA's Subsidy Advice Unit has reviewed the compliance assessment for the UK's renewable CfD scheme. (GOV.UK)

The same legal principles are relevant to hydrogen:

Is there a legitimate policy objective?

Is the subsidy necessary?

Is it proportionate?

Does it distort competition more than necessary?

Is the amount of support limited to the identified market failure?

Does the allocation mechanism provide appropriate competitive discipline?

8. State Aid and International Trade Issues

Hydrogen subsidies can also create competition-law and international-trade questions.

Where public money supports hydrogen producers, governments must consider whether the support:

advantages particular undertakings;

distorts competition;

affects cross-border trade;

discriminates between technologies or suppliers;

creates excessive compensation; or

disadvantages producers in other jurisdictions.

Within the EU, State aid rules and the European Commission's evolving framework for clean-energy and hydrogen support are particularly important.

For cross-border hydrogen markets, subsidy design must therefore be compatible with:

competition law;

State aid/subsidy-control rules;

public procurement principles;

WTO disciplines where relevant; and

international investment obligations.

9. Contractual Structure

A hydrogen CfD-type agreement normally needs to address much more than the support price.

Important contractual provisions include:

1. Conditions precedent

The project may need to obtain:

planning permission;

environmental permits;

hydrogen production certification;

grid connection;

financing;

land rights; and

offtake arrangements.

2. Commercial operation date

The contract should specify when the project must become operational.

3. Production obligations

The producer may be required to achieve minimum production or availability levels.

4. Eligible hydrogen

The agreement must define what constitutes qualifying low-carbon hydrogen.

5. Reference price

The calculation of the reference price is critical because it determines the amount of public support.

6. Strike price

The strike price reflects the project's supported economics.

7. Payment mechanism

The contract must specify:

measurement;

invoicing;

payment dates;

adjustments;

verification; and

audit procedures.

8. Change in law

Long-term hydrogen contracts must anticipate regulatory changes.

9. Force majeure

Events such as infrastructure failure, natural disasters or extraordinary governmental actions may affect production.

10. Termination

The contract must determine the consequences of:

project failure;

insolvency;

persistent non-performance;

fraud;

regulatory breach; or

failure to achieve milestones.

10. The Low Carbon Hydrogen Agreement

The UK LCHA demonstrates how these principles are translated into an enforceable contractual framework.

The government has published standard terms and conditions, front-end agreements and explanatory material for HAR1. The LCHA is expressly described as a private-law contract between a government-appointed counterparty and a hydrogen producer. (GOV.UK)

This distinction is important.

A subsidy programme can have two separate legal dimensions:

Public-law dimension

This concerns:

statutory authority;

subsidy control;

eligibility;

allocation;

administrative decisions;

transparency; and

judicial review.

Private-law dimension

This concerns:

contractual payment;

breach;

termination;

damages;

dispute resolution;

contractual interpretation; and

enforcement.

Hydrogen projects therefore sit at the intersection of administrative law and contract law.

11. Case Law: Drax Power Ltd v Secretary of State

A particularly useful case for understanding CfD-type support is:

R (Drax Power Ltd) v Secretary of State for Energy and Climate Change [2014] EWCA Civ 1153. (BAILII)

The case arose in the context of the UK's electricity-market reforms rather than hydrogen specifically.

The Court considered the legal framework surrounding Contracts for Difference and explained the basic economic purpose of the mechanism.

The CfD was understood as a long-term private-law contract under which the generator receives the difference between the reference price and strike price.

The court recognised that the mechanism was intended to provide greater price certainty and thereby encourage investment in low-carbon generation. (BAILII)

Relevance to hydrogen

Although Drax is not a hydrogen case, its principles are highly relevant because hydrogen support contracts use a similar conceptual architecture:

Long-term contractual revenue certainty → reduced market risk → increased investment incentives.

It demonstrates that the legal character of CfD support should not be confused with an unconditional government grant.

12. Case Law: R (Hinkley Point C) / Austria v Commission

Another important case is the litigation concerning the UK's support arrangements for Hinkley Point C.

The European Court of Justice dealt with a CfD used as part of the support package for the nuclear project. The case concerned EU State aid law and the compatibility of the support mechanism with the internal market.

The Court's materials describe the CfD as a mechanism intended to provide price stability for electricity sales during the operational phase of the project. (EUR-Lex)

Relevance to hydrogen

The case illustrates a crucial proposition:

A long-term CfD can constitute a form of public support requiring scrutiny under subsidy/State aid law.

That principle is particularly important for hydrogen because governments may commit billions in long-term support.

A hydrogen CfD must therefore be designed so that the support is:

necessary;

proportionate;

transparent;

appropriately targeted; and

capable of justification under applicable subsidy-control rules.

13. Administrative Review of CfD Allocation Decisions

Modern CfD systems also demonstrate the importance of procedural fairness.

Under the UK's electricity CfD framework, unsuccessful applicants can challenge certain allocation decisions through a staged dispute process. Ofgem explains that a Tier 2 review examines whether the Delivery Body correctly applied the CfD Regulations and Allocation Framework based on the evidence available at the relevant time. (Ofgem)

This provides an important model for hydrogen allocation systems.

A hydrogen allocation framework should establish:

transparent eligibility requirements;

consistent evaluation criteria;

reasons for decisions;

review mechanisms;

conflict-of-interest protections; and

appropriate judicial or administrative oversight.

14. Risk Allocation

The most important function of a hydrogen CfD is risk allocation.

The precise allocation determines the actual value of the subsidy.

15. Additional Subsidy Instruments

CfD-type contracts are only one component of hydrogen policy.

Governments can combine them with:

Capital grants

These reduce upfront construction costs.

Tax incentives

Examples include production or investment tax credits.

Concessional finance

Government-backed loans can reduce financing costs.

Guarantees

Government guarantees can reduce lender risk.

Demand-side subsidies

Industrial consumers can receive incentives to purchase low-carbon hydrogen.

Public procurement

Governments can create demand through procurement requirements.

Carbon contracts

A carbon-price mechanism can reduce the competitive disadvantage of low-carbon hydrogen.

Certification systems

Guarantees of origin and carbon-intensity certification can create a price premium for qualifying hydrogen.

16. Avoiding Over-Subsidisation

A major legal and economic problem is overcompensation.

Suppose a hydrogen project receives:

capital grant;

production subsidy;

tax credit;

concessional loan;

guaranteed offtake; and

CfD-style revenue support.

If all instruments are calculated independently, the producer could receive more support than necessary.

This can create:

excessive returns;

market distortion;

unfair competition;

subsidy-control problems; and

political/legal challenges.

Consequently, hydrogen subsidy contracts should contain mechanisms for:

subsidy stacking;

adjustment;

clawback;

reconciliation;

transparency;

audit; and

termination.

17. Interaction with Offtake Contracts

Hydrogen projects commonly depend upon long-term offtake agreements.

A typical structure is:

Government support contract + hydrogen offtake agreement + financing agreement

The offtaker might be:

steel producer;

refinery;

chemical manufacturer;

transport operator; or

power generator.

The CfD-type contract can make the hydrogen price sufficiently predictable for the offtake agreement to become bankable.

Thus, subsidy law and commercial contract law are closely interconnected.

18. Indian Legal Perspective

For India, a hydrogen subsidy/CfD framework would need to operate within the country's broader energy and environmental regulatory architecture.

Relevant legal and institutional considerations include:

Energy Conservation Act, 2001, as amended;

Electricity Act, 2003;

renewable-energy procurement frameworks;

electricity-market regulations;

environmental and pollution-control legislation;

industrial and safety regulations;

public procurement rules; and

the National Green Hydrogen Mission framework.

A future Indian hydrogen CfD could theoretically combine:

competitive bidding + guaranteed revenue support + green-hydrogen certification + long-term offtake + renewable-electricity requirements.

However, the precise legal structure would need to be established through appropriate legislation, regulations, government schemes and contractual instruments rather than simply importing the UK's model.

19. Key Legal Principles

Hydrogen CfD subsidy schemes should satisfy several principles.

Principle 1: Statutory authority

Government must have clear legal authority to spend public funds and enter long-term support contracts.

Principle 2: Transparency

Allocation criteria should be published in advance.

Principle 3: Competition

Competitive allocation can reduce subsidy costs and limit preferential treatment.

Principle 4: Proportionality

Support should address the identified market failure without unnecessarily compensating producers.

Principle 5: Technology neutrality, where appropriate

The government should explain why particular hydrogen technologies qualify or do not qualify.

Principle 6: Additionality

Support should generally generate investment or production that would not otherwise occur.

Principle 7: Environmental integrity

Public money should not support hydrogen that fails the applicable emissions or sustainability criteria.

Principle 8: Accountability

Payment calculations must be auditable.

Principle 9: Contractual certainty

Investors need confidence that contractual rights will be respected.

Principle 10: Adaptability

Long-term contracts must be capable of dealing with changing hydrogen markets and technologies.

20. Conclusion

Hydrogen subsidies and CfD-type support schemes are fundamentally mechanisms for allocating risk between the hydrogen producer, consumers and the state.

The UK Hydrogen Production Business Model demonstrates a particularly important model: rather than providing only an upfront grant, government uses a long-term contractual mechanism to address both price uncertainty and insufficient market demand. The HPBM operates through Low Carbon Hydrogen Agreements and competitive Hydrogen Allocation Rounds. (GOV.UK)

The principal legal lessons from existing CfD jurisprudence are that:

CfDs can be structured as private-law contracts;

government support may nevertheless constitute a subsidy/State aid requiring legal scrutiny;

allocation processes must comply with their statutory and regulatory frameworks;

long-term support should be carefully designed to prevent overcompensation;

transparent eligibility and dispute mechanisms are essential; and

hydrogen support must integrate public-law subsidy control with private-law contractual enforcement.

The cases Drax Power Ltd v Secretary of State [2014] EWCA Civ 1153 and the Hinkley Point C State aid litigation are therefore useful comparative authorities even though neither is specifically a hydrogen-production case. They help establish the broader legal principles governing CfD-based public support. (BAILII)

For contemporary UK policy, the statutory framework has also evolved: the Energy Act 2023 expressly provides powers concerning the allocation of hydrogen-production revenue-support contracts and allocation frameworks. (Legislation.gov.uk)