Nature and Biodiversity

Do we need a global aviation tax?

David Hodgkinson
Associate Professor, University of Western Australia
Our Impact
What's the World Economic Forum doing to accelerate action on Nature and Biodiversity?
The Big Picture
Explore and monitor how Future of the Environment is affecting economies, industries and global issues
A hand holding a looking glass by a lake
Crowdsource Innovation
Get involved with our crowdsourced digital platform to deliver impact at scale
Stay up to date:

Future of the Environment

Aviation has an emissions problem. As an industry, both in the scope of its operations and the nature of its emissions, aviation has a significant effect on the environment. Despite this, aviation emissions remain largely unregulated and are increasing even as many other industry sectors decrease theirs.

If global aviation was a country its emissions would be ranked about 7th, between Germany and South Korea, on carbon dioxide (CO2) alone. At the same time, air travel itself continues to grow 4 – 5% per year.

International action

In October 2013, the Assembly of the United Nations aviation body, the International Civil Aviation Organisation (ICAO), reached a consensus agreement to proceed towards a global market-based mechanism when the Assembly meets next in 2016, to be implemented in 2020. It mirrors the approach taken by the United Nations Framework Convention on Climate Change and its Kyoto Protocol generally on climate change matters.

Design of any market-based mechanism

Five years out from the proposed start date, a plethora of design issues need to be addressed, including how it would be implemented, and whether liable entities would be airline corporations, or nations, or a curious combination of both.

In late 2013, ICAO released a report assessing the viability of various market-based mechanisms to address the aviation emissions problem. It contemplates three options – global mandatory offsetting; global mandatory offsetting with revenue and global emissions trading. One option is not there, but arguably should be: a tax.

A tax on aviation

In terms of policy instruments or systems to mitigate climate change – to increase the price of carbon, to limit emissions and to encourage the development of alternative energies – the more simple a system is, the more likely it is to work.

The question is whether to rely on quantity-based or price-based instruments. A quantity-based instrument is an emissions trading scheme, with the most common example a cap-and-trade system – such as those schemes which the Australian government has implemented or tried to implement. A less well known, and seldom taken up version of an emissions trading scheme, is a baseline-and-credit scheme.

A carbon tax imposes a fee for every ton of carbon produced. Put another way, a carbon tax imposes a fee on fossil fuels – coal, oil, natural gas – in proportion to the carbon they contain. Fuels which are more carbon-intensive (coal, for example) become more expensive under a carbon tax; solar becomes more competitive. A carbon tax would raise the price of fossil fuels.

Supporters of a carbon tax on aviation, both in isolation and as part of an emissions trading scheme, point out that taxes capture revenue more easily than quantitative instruments, and are less costly. Tax infrastructure is in place; pre-existing collection mechanisms exist. Taxation has lower administrative and compliance costs than does carbon trading.

Taxation is more direct and more transparent than emissions trading and provides price certainty and stability (as opposed to permit price volatility) by implementing a fixed price for carbon emissions across the airline industry.

The option of a tax on aviation would also be consistent with ICAO’s guiding principles for the design and implementation of market-based mechanisms for international aviation (including transparency, administrative simplicity and cost-effective implementation).

Any tax on aviation could take the form of a ticket tax or a departure tax or both. Specific fuel taxes are prohibited under the 1944 Chicago Convention on International Civil Aviation and most bilateral air services agreements.

Who will pay?

Regardless of whether ICAO members ultimately determine that a trading scheme or a tax is the preferred instrument to address the aviation emissions problem, the costs of both will be passed on to passengers. In ICAO’s 2013 report, it is estimated that in 20 years time, the cost of a market-based scheme would be about US$10 per seat for a flight of 12,000 kilometres and US$1.50 per seat on a flight of 900 to 1,900 kms.

The ICAO consensus agreement also reflected demands from developing countries to put more of the onus on industrialised countries overall to reduce aviation emissions. So depending on the nationality of the airline and the relevant route, some passengers will pay more, and some will pay less.

Under any market-based mechanism, then, some passengers will be more “equal” than others.

This article is published in collaboration with The Conversation. Publication does not imply endorsement of views by the World Economic Forum.

To keep up with Forum:Agenda subscribe to our weekly newsletter.

Authors: Rebecca Johnston is an Adjunct Lecturer in Aviation Law at the University of Notre Dame Australia and a director of HodgkinsonJohnston Pty Ltd. David Hodgkinson is an Associate Professor, Law School at University of Western Australia.

Image: An EasyJet aircraft comes into landing during sunset at East Midlands airport, central England October 5, 2008. REUTERS.

Don't miss any update on this topic

Create a free account and access your personalized content collection with our latest publications and analyses.

Sign up for free

License and Republishing

World Economic Forum articles may be republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License, and in accordance with our Terms of Use.

The views expressed in this article are those of the author alone and not the World Economic Forum.

Related topics:
Nature and BiodiversityIndustries in Depth
World Economic Forum logo
Global Agenda

The Agenda Weekly

A weekly update of the most important issues driving the global agenda

Subscribe today

You can unsubscribe at any time using the link in our emails. For more details, review our privacy policy.

Ban these companies from advertising, says UN chief, and other nature and climate stories you need to read this week

Michael Purton

June 13, 2024

About Us



Partners & Members

  • Join Us

Language Editions

Privacy Policy & Terms of Service

© 2024 World Economic Forum