Deemed value penalties are financial penalties commercial fishers are required to pay when they catch more fish than they are legally allowed. 

Commercial fishers must acquire Annual Catch Entitlements (ACE) to cover the fish they catch. If they catch more fish than they have ACE, they must buy more ACE. If they cannot source enough ACE, they are invoiced a set amount, per kilogram, for the extra fish. They can keep and sell the extra fish they land.