(6 minute read)

• The Bureau of Meteorology has confirmed a strengthening El Niño that could become one of the most powerful on record, and Australia’s spring bushfire outlook already shows elevated risk across most states and territories.
• The last comparable event, the 2019–20 “Black Summer”, produced wildly different cost estimates depending on what was measured: as low as $2.3 billion in insured losses, or as high as $100 billion in total economic impact.
• Understanding why those numbers diverge so dramatically is the key to understanding what a severe bushfire season actually costs Australia; and who ends up paying for it.

By Yassa Ahmed

Australia’s Bureau of Meteorology confirmed in June that El Niño had arrived, and by late August it was warning the event could strengthen into one of the most powerful “Super El Niño” systems recorded since 1950; a phenomenon some meteorologists have taken to calling a “Godzilla” El Niño.

The Australian and New Zealand Council for Fire and Emergency Services’ spring outlook, released August 19, shows increased bushfire risk across most states and territories, with soil moisture deficits already expanding through eastern Australia and Western Australia by July.

It is a familiar setup. El Niño weakens the trade winds that carry moisture toward Australia’s east coast, drying out vegetation ahead of summer and loading the dice for exactly the kind of extreme fire conditions that produced the 2019–20 Black Summer season; still, five years on, the reference point every subsequent bushfire forecast gets measured against.

Which makes it worth asking a genuinely useful question before summer arrives: what does a season like that actually cost, in dollar terms; and why do the answers to that question vary so enormously depending on who’s doing the counting?

The Same Disaster, Wildly Different Price Tags

Search for “the cost of the Black Summer bushfires” and you’ll find figures ranging from roughly $2 billion to over $100 billion; for the same event. That is not sloppy reporting. It reflects three genuinely different things being measured, and untangling them is the most useful thing an economics piece on this topic can do.

Insured losses are the narrowest and most precise figure: the Insurance Council of Australia put the direct insured loss at around $2.3 billion (some estimates run closer to $5.5 billion once revised). This only counts what insurers actually paid out; it excludes anything uninsured, which in bushfire prone regional Australia is a substantial share of total losses.

The GDP impact is a wider, harder to pin down number. Treasury’s own estimate put the reduction in GDP at around $4.6 billion, while a Sydney Global Studies (SGS) analysis of just three of the worst affected local government areas found a $3.9 billion hit to those regions alone; a reminder that national GDP figures can understate how severely a handful of communities were affected.

Total economic cost is the broadest measure, and where the eye watering headline numbers come from. Estimates exceeding $100 billion, cited by researchers at UNSW’s BusinessThink, attempt to capture everything: destroyed capital and infrastructure, lost productivity, higher future insurance premiums, reduced tourism, healthcare costs from smoke exposure, and, more contestable, non market values like biodiversity loss and the economic value of a life lost.

These broader figures are legitimate and important for understanding total social cost, but they are a different kind of number entirely from what shows up in quarterly GDP data or an insurer’s claims book, and the two should not be quoted interchangeably.

Where the Real Money Went

Even sticking to the more conservative, better documented figures, Black Summer’s sectoral breakdown is instructive. Agriculture alone absorbed up to $5 billion in losses, 6 to 8% of agricultural GDP that year, split roughly evenly between damaged farmland and infrastructure, and the loss of more than 100,000 livestock.

Tourism lost an estimated $2.8 billion in total output, as smoke haze and highway closures kept visitors away from regions that depend heavily on seasonal trade.

Smoke related healthcare costs alone reached $1.95 billion; more than nine times the median annual bushfire healthcare cost of the previous 19 years combined.

Zoom out to the national picture and Deloitte estimates that natural disasters currently cost the Australian economy more than $38 billion a year across all disaster types; a figure it projects will grow to at least $73 billion annually by 2060 as climate driven events become more frequent and severe.

The Insurance Mechanism Worth Understanding

The part of this story with the most direct relevance to household budgets, rather than abstract GDP figures, is what repeated severe bushfire seasons do to insurance markets. Insurers price risk forward, not backward; so an increasingly active fire season does not just cost money when it happens; it reshapes premiums for years afterward, for everyone in a fire prone postcode, whether or not their own property was ever touched by flame.

Researchers at UNSW have flagged a genuine risk here: as bushfire frequency and severity rise, Australian insurers may increasingly follow overseas peers in simply withdrawing coverage from the highest risk areas altogether, rather than pricing it at whatever premium the actuarial tables demand.

That creates what the industry calls a “protection gap;” households priced out of, or entirely excluded from, insurance in exactly the areas most likely to need it.

This also connects to a thread worth watching in its own right: insurance costs are a real, measured component of Australia’s inflation basket, and rising premiums, driven by exactly this kind of climate risk repricing, have been one of the stickier contributors to underlying inflation in recent years.

A severe bushfire season does not just show up in disaster relief budgets. With enough repetition, it shows up in the same inflation data the Reserve Bank is trying to bring back to target.

What a “Godzilla” Season Would Actually Mean

None of this is a prediction that this coming season will replicate Black Summer; El Niño loads the dice for worse fire conditions, but it does not guarantee any particular outcome, and Australia’s fire and land management agencies have invested heavily in preparedness since 2019–20.

But the scale of the numbers above is the reason meteorologists and economists alike are watching this spring’s conditions closely rather than treating the forecast as routine seasonal noise.

If the coming season does turn severe, the costs will not land evenly. Farmers and regional tourism operators carry disproportionate exposure. Households in fire prone areas face a genuine, multi-year risk of rising premiums or reduced insurance availability, regardless of whether their own property is directly affected.

And government budgets, already stretched by the scale of Black Summer’s $2 billion federal recovery package, would face renewed pressure at a moment when fiscal room is already tighter than it was in 2019.

The headline “bushfire season could be one of the worst on record” is, unfortunately, a familiar one in Australian summers. The more useful habit, every time that headline appears, is asking which of the three cost measures above is actually being quoted; because the difference between “$2 billion” and “$100 billion” is not an exaggeration.

It is the difference between what got insured, what showed up in GDP, and everything else that never made it into either number.