Haig Simmons Definition Detail

About Haig Simmons Definition Detail

The Haig Simons definition of income provides the theoretical benchmark for comprehensive income taxation. Under this definition, income equals consumption plus change in net worth. This includes unrealized capital gains, imputed rent on owner occupied housing, gifts, and inheritances. The US tax system departs significantly from the Haig Simons ideal by excluding unrealized gains until realization, not taxing imputed rent, and providing preferential rates for capital gains and dividends. The departures create distortions and opportunities for avoidance. Senator Ron Wyden proposed taxing unrealized gains for billionaires, a step toward the Haig Simons ideal. The proposal was controversial and did not advance. The Haig Simons framework continues to inform debates about whether the tax base should be income, consumption, or wealth.