Norway’s salmon tax brought in NOK 468.6 million (€39.3 million) in net revenue for the state in 2024, far below the government’s earlier estimate of around NOK 3.7 billion (€311 million) per year. The gap has reignited a long-running debate over whether the resource rent model designed for aquaculture is working as intended, and whether coastal communities will see the public returns the tax was supposed to deliver.
What the salmon tax is, and who pays it
The “salmon tax” is the shorthand name for Norway’s resource rent tax on aquaculture (grunnrenteskatt på havbruk). It was introduced with effect from 1 January 2023 and applies to companies that hold commercial licences for sea-based farming of salmon, trout and rainbow trout.
The logic follows a familiar Norwegian principle: when private firms earn extraordinary returns from exploiting a common natural resource—in this case, access to coastal sea areas—part of that value should flow back to the public.
In practice, the tax is calculated on the profit linked to the sea phase of production. It is paid on top of ordinary corporate income tax, and is calculated after deducting allowable costs and other adjustments. The statutory rate is 32.1%, while production fees paid by the industry are deducted from what is ultimately payable.
The coastal politics behind the tax
Few Norwegian tax debates in recent years have been as politically charged as the salmon tax.
Supporters—primarily within the governing coalition at the time of introduction—framed it as a fairness measure: aquaculture companies have benefited from access to limited coastal areas and regulatory privileges, and the public should share in the value. They also argued that predictable revenue would strengthen the finances of coastal municipalities that host fish farms.
Opponents—led by parts of the industry and several opposition parties—warned it could reduce investment, push activity abroad, and weaken Norway’s global competitiveness in seafood. The first-year revenue numbers are now being used by critics to argue that the tax is either poorly designed or too easy to “plan around,” while supporters counter that it is too early to judge a system that depends on complex accounting and volatile markets.
Norway’s aquaculture sector remains one of Europe’s most strategically important seafood industries. How the salmon tax evolves will matter not only for Norway’s coastal economy, but also for wider debates in the Nordic region and the EU/EEA about how to tax resource-based profits while keeping investment and production at home.
The 2024 numbers: gross vs net revenue
The first full-year “scorecard” for the tax was always expected to be complicated, but the published figures still surprised many observers.
According to the Norwegian Tax Administration (Skatteetaten), the gross assessed resource rent tax for aquaculture in income year 2024 was NOK 1.005 billion (€84.4 million). After subtracting the production fee on farmed fish, the net resource rent tax was NOK 468.6 million (€39.3 million).
Those totals sit far below the revenue levels discussed when the tax was designed in 2022–2023. The government had previously indicated annual revenues in the range of NOK 3.65–3.8 billion, with a political ambition that a large share should benefit the municipal sector along the coast.
Why many producers paid zero
A central reason for the shortfall is that a large number of firms ended up with zero tax assessed in the first year of data.
Skatteetaten’s overview shows 77 companies with NOK 0 in assessed resource rent tax for 2024. Reporting requirements still apply even when no tax is payable, which means “zero” does not necessarily mean “no activity”—it can reflect how profits, costs and internal pricing are allocated.
Aftenposten and other Norwegian outlets have reported that several major listed groups—including Mowi, SalMar, and Grieg Seafood—did not pay resource rent tax for 2024.
The sector argues that the design of the tax, by focusing on value creation specifically in the sea phase, creates strong incentives to adjust internal structures and pricing. Large groups can split operations into multiple entities, move biomasses between units, or reorganise how services and inputs are purchased and billed across subsidiaries. If the sea-phase entity shows lower profit—because more costs are booked there or because services are purchased at higher internal prices—the taxable base can fall sharply.
The rules also allow negative resource rent income to be carried forward and offset against future positive resource rent income. That mechanism exists in other Norwegian resource rent models as well, but it means that weak years—whether because of salmon price swings, biological challenges, or cost spikes—can reduce payments in the early period.
Finally, the tax includes a basic allowance (bunnfradrag) intended to ensure that smaller producers do not pay. That policy choice narrows the pool of payers even further and makes the revenue outcome more sensitive to what happens in a relatively small number of large groups.
What could change: audits, prices, and transition rules
Both the government and the tax authorities have stressed that early figures may not be the final word. The resource rent tax is based on company reporting, and there may be disputes about how rules should be interpreted—especially around transfer pricing and transactions within corporate groups. Skatteetaten can later audit and adjust the basis if the reporting is found to be incorrect.
At the same time, the economics of Norwegian aquaculture can move quickly. Salmon prices, feed costs, biological conditions and disease outbreaks can all shift profitability year to year. If the industry returns to higher margins and firms’ sea-phase profits rise, revenue from the salmon tax could increase—particularly once the transition period ends and companies settle into stable reporting structures.
