Unpriced Does Not Mean Unpaid

As climate liability reaches the Supreme Court, an eight-year lawsuit illustrates what happens when economically real costs have nowhere else to go.

On Monday, the Supreme Court heard oral arguments in Suncor Energy (U.S.A.) Inc., et al. v. County Commissioners of Boulder County, et al., a case Boulder, Colorado first brought against ExxonMobil and Suncor in 2018.

The litigation has already made a long journey from filing to the Roberts court. Boulder brought state-law claims seeking compensation for local harms associated with climate change and the companies’ production, promotion, and sale of fossil fuels. Eight years later, the question before SCOTUS is still not what those harms cost, or who should pay for them. The Court is considering whether federal law precludes Boulder’s claims from proceeding under Colorado law — and, before it can reach even that question, whether it has jurisdiction to decide the case at this stage. The legal questions are complicated, but the economic problem underneath them is not.

Boulder (as is true of every city, every region, and every nation) faces real and growing costs from climate change. Damage to property and infrastructure, wildfire and drought, pressure on water systems, and the expense of adapting a community to a changing climate are putting immense pressure on already stressed systems. Those costs exist regardless of what the Supreme Court decides. The litigation currently before the court asks whether some of them can be attributed to, and recovered from, fossil-fuel companies.

Economically, the costs already belong somewhere. An externality is often described as an “unpriced” cost. But, crucially, unpriced does not mean unpaid. Someone always pays, and historically, the parties who end up paying are those with the least power to negotiate the terms.

A cost excluded from one balance sheet will always appear on another. It appears in a household’s medical expenses, an insurer’s losses, a government’s adaptation budget, a farm’s diminished output, or infrastructure that must be repaired or replaced. The benefit and the harm may appear on entirely different ledgers, but that separation is an artifact of accounting, not reality. The costs were never separate. The accounting simply failed to connect them.

That matters because the absence of a price is not the absence of an allocation. When an economically real cost is left outside the transaction that helped create it, the cost is allocated by default to whoever eventually absorbs it. Frequently, that means people and institutions with little ability to identify the source of the cost, price it in advance, or put it back where it came from. Litigation arrives later and asks courts to reconsider that allocation. Sometimes that is necessary, but it is also an extraordinarily expensive and inefficient way to do the accounting.

By the time an externalized cost becomes the subject of litigation, much of the opportunity to manage it efficiently has already passed. The harm has occurred, and attribution has become adversarial. Plaintiffs and defendants spend years contesting causation, jurisdiction, and responsibility. Boulder’s case is eight years old, and SCOTUS is just now considering whether the claims can proceed at all. This is what pricing a cost after the fact looks like.

There is a better time to identify an externality, and that is before it becomes a liability.

Imagine that the economically significant harms associated with a business or an industry were visible alongside its revenue, its margins, and its conventional liabilities. Not as an ESG score or a subjective moral judgment, but as a defensible estimate of costs that are currently being borne. Imagine being able to see who bears those costs, how certain the evidence is, how the costs may change over time, and, critically, which interventions could reduce them in time.

For a company, that is information about liabilities and opportunities while there is still time to act. For an investor, it reveals risks and sources of value that conventional financial statements cannot see. For an insurer, it makes emerging exposures legible before they mature into claims. For a government, it shows which costs are migrating toward the public balance sheet, and what it might cost to stop them.

If an intervention costs $1 million and prevents $5 million in expected harm, the difference is not merely a social good; it is economic value. The harder question — and the financially interesting one — is who can capture, finance, insure, or otherwise act on that value.

Prevention is therefore a moral position and a problem of capital allocation.

At Calx, this is the problem we are working on. We are building the analytical infrastructure to identify externalized harms, determine who bears them, translate them into economically usable estimates, and compare the interventions available to reduce them.

Because the question is not whether climate harms will be paid for. They already are.

The question is whether we identify those costs early enough to manage them, while companies can reduce them, investors can price them, insurers can anticipate them, governments can plan for them, and capital can still move toward interventions that cost less than the harms they prevent. Or we can continue to leave those costs scattered across balance sheets that were never designed to contain them, wait until the damage becomes impossible to ignore, and spend years asking courts to determine where the bill belongs.

We’re building the accounting that makes collective debt legible, so it can be paid down collectively instead of extracted from someone, somewhere, all at once. Not simply because that is the morally correct thing to do, but because a debt collected all at once, from whoever has the least power to negotiate its terms, is a crisis.

And crisis (or litigation) is the most expensive way an economy can discover what it owed all along.