Franziska Mager is senior researcher and advocacy lead for climate and inequalities at the Tax Justice Network.
As the climate crisis accelerates, global fault lines widen. Wealthy nations gut aid budgets while pouring fortunes into their militaries. Their climate finance commitments ring hollow, hidden behind claims that public funds have run dry.
But the money is there – and a bold tax justice agenda can unlock it. Reclaiming tax sovereignty – the power to decide how wealth is taxed and where it goes – can shift resources from billionaires and corporate giants to real climate solutions.
Tax Justice Network analysis shows governments could raise an extra US$2.6 trillion a year by applying a modest wealth tax on the richest 0.5% and ending corporate tax abuse. This would more than cover global climate finance needs and still leave most countries with billions to invest in care, education and green jobs at home.
Coalition set sights on taxing luxury air travel to fund climate action
The climate crisis is accelerating. Floods, heatwaves and crop failures are pushing more people into precarity. Climate adaptation, mitigation, and loss and damage could cost US$9 trillion a year by 2030. Yet the global community is still scrambling to honour a US$100 billion pledge made over 15 years ago.
As attention turns from the Bonn climate talks to the fourth Financing for Development conference in Seville, climate finance remains a structural void that policy declarations alone cannot fill.
On the road to COP30 in Belém, governments face a critical choice: keep chasing inadequate voluntary climate finance handouts, or finally confront the rigged tax systems that let the super-rich and big polluters amass obscene wealth while the planet burns.
Plugging leaky tax systems
As our research shows, fair taxes on extreme wealth and curbing multinational tax abuse could raise more than double the UN’s US$1.3 trillion annual climate finance goal for 2035. The real issue isn’t where new money comes from, but why governments let public resources leak through a broken tax system.
Applying a modest annual wealth tax of 1.7-3.5% and reclaiming tax from multinationals that underpay could unlock revenue equal to 2.4% of global GDP. This money could be raised today if governments closed loopholes and took action.
Our modelling based on countries’ historic emissions responsibility shows striking results: with a US$300 billion global climate finance fund, 89% of countries could cover their share and still have billions left for public services. Even with a US$1.5 trillion fund, 58% would contribute their fair share and have money to spare.
Take the United States. It could raise enough additional revenue to contribute US$365 billion a year towards climate finance and still be left with US$412 billion to spend at home. China, India, the United Kingdom and Brazil follow the same pattern.
This is the core message of our climate finance slider tool. Taxing extreme wealth and curbing tax abuse does not pit climate justice against development. It enables both. The interactive tool shows how much countries could raise and how much they could contribute if tax rules were rebalanced in favour of people and planet.
Governments lose tax control
So why are countries still acting like climate finance is unaffordable?
The answer lies in decades of eroded tax sovereignty. Governments have signed away their taxing rights through unfair treaties, handed out corporate tax breaks under economic coercion, and let wealth pour into secrecy jurisdictions. In doing so, they’ve stripped themselves of the power – and the will – to tax the richest and biggest polluters driving the climate crisis.
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Today, 61% of countries have an “endangered” level of tax sovereignty or worse — meaning they are failing to collect tax revenue worth at least 5% of what they already raise, largely from their richest households and from multinational corporations that underpay tax.
Nearly a fifth of countries fall into the “negated” category, missing out on the equivalent of 15% or more of their annual tax revenue. These are not natural constraints. They are political outcomes shaped by an unequal global financial system.
Across the Global South, the consequences are especially severe. Governments face impossible tradeoffs between education and adaptation, debt service and disaster response. Climate finance cannot be separated from this wider fiscal injustice.
When forced to borrow for every disaster or rely on aid pledges, governments lose both agency and time. The race to build resilience becomes a race against the clock – one they cannot win without revenue.
Wealth taxes popular with voters
It’s time to reframe the debate. Climate finance can’t rely on broken promises or voluntary pledges. It must come from fair, redistributive tax systems that reflect both capacity to pay and responsibility for emissions.
The upcoming UN Tax Convention is a once in a generation opportunity to rebalance global tax rules. Done right, it could help countries tax their richest residents and corporations fairly, ending tax havens, profit-shifting and billionaire impunity.
Comment: A global wealth tax is needed to help fund a just green transition
But we do not need to wait for negotiations to conclude. Countries can act now by introducing wealth taxes, renegotiating exploitative tax treaties, increasing transparency and aligning fiscal policies with climate goals.
These reforms are not only possible. They are popular. Polling consistently shows widespread support for taxing extreme wealth to fund public goods.
Extreme wealth fuels climate inaction, rising debt and inequality. In a world on fire, refusing to tax those who profit most is no longer neutral – it’s a global risk.
The post There is no climate finance gap – only a tax sovereignty gap appeared first on Climate Home News.
There is no climate finance gap – only a tax sovereignty gap
Climate Change
Congress Grills Officials About the Potomac River Sewage Spill
Months after a collapsed pipe pushed nearly 250 million gallons of raw sewage into the river, residents say the area still smells.
Members of a congressional subcommittee this week questioned utility leaders and state officials about their knowledge of preexisting problems with the sewage line that collapsed on Jan. 19 near the Potomac River.
Congress Grills Officials About the Potomac River Sewage Spill
Climate Change
China’s Shark Finning Could Lead to US Seafood Sanctions
A formal petition to the U.S. government calls for sanctions on Chinese seafood imports as it highlights China’s loophole-ridden illegal shark fin trade.
For migrant workers trapped onboard Chinese distant water fishing fleets, cutting the fins off sharks as they writhe violently on rusted decks in the Indian Ocean isn’t accidental. It’s an intentional and lucrative act that marks the start of a bloody half-a-billion-dollar offshore supply chain, tacitly supported by Beijing yet covertly concealed from port inspectors globally.
Climate Change
New data shows rich nations likely missed 2025 goal to double adaptation finance
New data on international climate finance for 2023 and 2024 suggests that wealthy countries are highly unlikely to have met their pledge to double funding for adaptation in developing nations to around $40 billion a year by 2025 amid cuts to their overseas aid budgets.
At the COP26 climate summit in Glasgow in 2021, all countries agreed to “urge” developed nations to at least double their funding for adaptation in developing countries from 2019 levels of around $20 billion by 2025. Funding for adaptation has lagged behind money to help reduce emissions and remains the dark spot even as the data showed overall climate finance rose to a record $136.7 billion in 2024.
A United Nations Environment Programme report warned last year that wealthy nations were likely to miss the adaptation finance target and the data released on Thursday by the Organisation for Economic Co-operation and Development (OECD) shows that in 2024 adaptation finance was just under $35 billion.
The OECD, an intergovernmental policy forum for wealthy countries, said the increase between 2022 and 2024 was “modest”, adding that meeting the doubling target would require “strong growth” of close to 20% in 2025.
More cuts likely
The OECD’s figures do not go up to 2025, but several nations announced cuts to climate finance last year. The most notable was the abandonment of US pledges to international climate funds by the new Trump administration but the UK, France, Germany and other wealthy European countries also pared back their contributions.
Joe Thwaites, international finance director at the Natural Resources Defense Council, said developed countries were “not on track” to meet the adaptation funding goal.
Power Shift Africa director Mohamed Adow said adaptation finance is needed to expand flood defences, drought-resistant crops, early warning systems and resilient health services as the world warms, bringing more extreme weather and rising seas. “When that money fails to arrive, people lose homes, harvests and livelihoods – and in the worst cases, their lives,” he warned.
Imane Saidi, a senior researcher at the North Africa-based Imal Initiative, called the $35 billion in adaptation finance in 2024 “a drop in the ocean”, considering that the United Nations estimates the annual adaptation needs of developing countries at between $215 billion and $387 billion.
If confirmed, a failure to meet the goal is likely to further strain relations between developed and developing countries within the UN climate process. A previous pledge to provide $100 billion a year of total climate finance by 2020 was only met two years late, a failure labelled “dismal” by the UAE’s COP28 President Sultan Al Jaber and many other Global South diplomats.
Missing that goal would also raise doubts about donor governments’ commitment to meeting their new post-2025 adaptation finance goal. At COP30 last year, governments agreed to urge developed countries to triple adaptation finance – without defining the baseline – by 2035.
African and other developing countries have pointed to lack of funding as a key flaw in ongoing attempts to set indicators to measure progress on adapting to climate change.
Speaking to climate ministers from around the world in Copenhagen on Wednesday, Turkish COP31 President Murat Kurum stressed the importance of climate finance. “It is easy to say we support global climate action,” he said, “but promises must be kept.”
He said the COP31 Presidency will use the new Global Implementation Accelerator and recommendations in the Baku-to-Belem roadmap, published last year, to scale up climate finance – and will hold donors accountable for their collective finance goals.
He noted that developed countries should this year submit their first reports showing how they will deliver their “fair share” of the new broader finance goal set at COP29 in 2024, to deliver $300 billion a year in climate finance by 2035. They are due to report on this once every two years.
Broader climate finance
The OECD data shows that the overall amount of climate finance – including funding for emissions cuts – provided by developed countries grew fast in 2023 before declining in 2024. In contrast, the amount of private finance developed countries say they “mobilised” increased in both 2023 and 2024, pushing the top-line figure to a record high.
While the OECD does not say which countries provided what amounts, data from the ODI Global think-tank suggests that the 2024 cuts to bilateral climate finance were spread broadly among wealthy nations.
Thwaites of NRDC welcomed the fact that overall climate finance provided and mobilised by developed countries exceeded $130 billion in both 2023 and 2024. He said that this was “well above earlier projections” and “shows that when rich countries work together, they can over-achieve on climate finance goals”.
But Sehr Raheja, programme officer at the Delhi-based Centre for Science and Environment, said these figures are “modest” when set against the new $300-billion goal.
“While the headline total figure of climate finance remains alright,” she said, “declining bilateral climate spending raises important questions about the predictability of high-quality, concessional public finance, which has consistently been a key demand of the Global South.”
She also lamented that loans continue to dominate public climate finance and that mobilised private finance is concentrated in middle-income countries and on emissions-reduction measures rather than adaptation projects. “Private capital continues to follow bankability rather than climate vulnerability or need,” she added.
Ritu Bharadwaj, climate finance and resilience researcher at the International Institute for Environment and Development, said the figures painted an outdated picture as climate finance has since declined as rich countries shrink their overseas aid budgets and increase spending on defence.
Last month, the OECD published figures showing that international aid – which includes climate finance – fell by nearly a quarter in 2025. The US was responsible for three-quarters of this decline. The OECD projects a further decline in 2026.
With Thursday’s climate finance report, the OECD is “publishing a victory lap for 2023 and 2024 at almost the same moment its own aid statistics show the funding base eroding underneath it,” Bharadwaj said.
The post New data shows rich nations likely missed 2025 goal to double adaptation finance appeared first on Climate Home News.
New data shows rich nations likely missed 2025 goal to double adaptation finance
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