Natural capital accounting is a system for measuring and tracking the value of natural resources the same way countries and companies track financial assets. It treats things like forests, water, soil, and wildlife as a form of capital, recording both the “stock” (how much exists) and the “flow” (what benefits they provide to people over time). The goal is to make the economic contributions of nature visible in balance sheets and national accounts, so they factor into real decisions about spending, land use, and long-term planning.
Stocks, Flows, and Why the Distinction Matters
The UN defines natural capital as the stock of renewable and non-renewable resources (plants, animals, air, water, soils, minerals) that combine to yield a flow of benefits to people. Think of a forest as a stock. The timber it produces, the carbon it absorbs, the water it filters, and the flood protection it provides are all flows. Traditional economic accounting captures the timber sale but ignores the rest. Natural capital accounting is designed to capture all of it.
This stock-and-flow structure mirrors how financial accounting works. A company tracks its assets (stock) and its revenue (flow). A country tracks its infrastructure and its GDP. Natural capital accounting simply extends that logic to the environment, so a wetland that prevents $50 million in annual flood damage shows up as an asset, not empty land waiting for development.
Physical and Monetary Measurement
Natural capital accounts come in two forms. Physical accounts record quantities in their natural units: hectares of forest, cubic meters of water, tons of carbon stored in soil. Monetary accounts then convert those quantities into dollar or euro values representing the cost to society if those services disappeared.
The monetary conversion can take several forms. Some values are straightforward, like avoided water treatment costs when a watershed filters pollutants naturally. Others are harder to pin down, like the social value of clean air measured by counting the number of people whose health depends on it. The luxury group Kering, for example, built an “Environmental Profit and Loss” statement that measures six categories of impact across its entire supply chain: greenhouse gas emissions, air emissions, water pollution, water consumption, waste production, and land use. Each is first recorded in physical units (tons of CO2, hectares of land) and then converted into euros. That single-currency translation lets the company compare completely different types of environmental impact side by side, evaluate raw material choices, and hold individual brands accountable for their own action plans.
The International Standard: SEEA
The main global framework is the System of Environmental-Economic Accounting, or SEEA, maintained by the United Nations. It functions as the environmental counterpart to the System of National Accounts that countries already use to calculate GDP. The most recent major addition, SEEA Ecosystem Accounting, was adopted by the UN Statistical Commission in March 2021. It provides a standardized way to organize data about habitats and landscapes, measure ecosystem services, track changes in ecosystem assets, and link all of that to economic activity.
One distinctive feature of the SEEA Ecosystem Accounting framework is that it is spatially explicit. Accounts can be presented as maps, allowing users to see exactly where and when changes are occurring. Carbon sequestration, for instance, can be mapped across ecosystems over time, covering not just forests but also wetlands, grasslands, and coastal systems that play a role in stabilizing the climate. The framework also includes dedicated carbon accounts that track carbon stocks and flows across biomass, soils, the atmosphere, and the economy.
As of the 2025 Global Assessment, 98 countries have implemented some form of SEEA accounting. Implementation ranges from initial pilot compilations to regular production and public dissemination of accounts.
How Governments Use It
The practical appeal of natural capital accounting is that it plugs environmental data directly into the same budgeting and forecasting processes governments already rely on. A 2023 U.S. national strategy document laid out several concrete applications. Natural capital accounts would give agencies better visibility into supply chain vulnerabilities, helping them understand how dependence on specific natural resources creates economic and financial risk. They would allow the federal government to track returns on nature-based infrastructure investments, like those funded through the Bipartisan Infrastructure Investment and Jobs Act, which currently don’t appear on the nation’s balance sheet.
Agricultural policy offers a specific example. Natural capital accounts can quantify the economic contributions of pollinators, giving agencies the data they need to design targeted incentive programs for on-farm pollinator habitat conservation. Without those accounts, the economic case for conservation spending remains abstract. With them, it becomes a line item with a measurable return.
The World Bank’s WAVES program (Wealth Accounting and Valuation of Ecosystem Services) has pushed this approach in developing countries. In the Philippines, one of eight core implementing countries, the program created pilot accounts for minerals and mangroves in the Laguna Lake Basin and Southern Palawan. The idea is to mainstream natural resource accounting into national development planning so that decisions about land use, extraction, and coastal development reflect the full value of what’s at stake.
Corporate Natural Capital Accounting
On the business side, natural capital accounting is increasingly tied to financial disclosure requirements. The Taskforce on Nature-related Financial Disclosures (TNFD) has established a framework that asks companies to report on their relationship with nature across four pillars: governance, strategy, risk and impact management, and metrics and targets. Under governance, companies describe how their boards oversee nature-related risks and opportunities, including engagement with Indigenous Peoples and local communities. Under strategy, they identify dependencies on nature across short, medium, and long time horizons and disclose priority locations where their operations intersect with sensitive ecosystems.
Kering’s Environmental Profit and Loss approach illustrates how this plays out in practice. The company measures impacts from raw material production through consumer use and product end of life. By converting everything to monetary values, the EP&L reveals which stages of the supply chain drive the largest impacts, which materials carry the heaviest environmental cost, and how different sourcing locations compare for the same product. That information then feeds into sourcing decisions. If switching from conventional cotton to organic cotton in a specific region reduces the monetized environmental cost by a measurable amount, the business case becomes concrete.
Why Traditional Accounting Misses Nature
Standard national accounts and corporate balance sheets were never designed to capture the value of ecosystem services. GDP measures market transactions, so a forest only contributes to GDP when its timber is sold. The water filtration, flood control, carbon storage, and biodiversity that same forest provides are invisible. This creates a systematic blind spot: investments in nature-based solutions get miscategorized or lost entirely, and the depletion of natural resources doesn’t register as a loss on any balance sheet.
Natural capital accounting corrects this by expanding the production boundary, recognizing services like carbon sequestration and air filtration that benefit people but never pass through a market. For governments, this means infrastructure decisions can weigh a wetland’s flood protection value against the cost of building a concrete levee. For companies, it means supply chain risks tied to water scarcity, soil degradation, or pollinator decline become quantifiable financial exposures rather than vague sustainability concerns.