Laffer Curve
Quick Definition
A theoretical relationship showing that there is an optimal tax rate that maximizes government revenue — too high or too low both reduce collections.
Key Takeaways
- Tax revenue is zero at both 0% and 100% tax rates
- An optimal rate exists between the extremes that maximizes revenue
- Foundation of supply-side economics and arguments for tax cuts
- The optimal rate is highly debated and context-dependent
What Is Laffer Curve?
The Laffer Curve, popularized by economist Arthur Laffer in the 1970s, illustrates the theoretical relationship between tax rates and government revenue. It posits that at a 0% tax rate, revenue is zero (no taxes collected), and at a 100% tax rate, revenue is also zero (no incentive to earn). Between these extremes lies an optimal rate that maximizes revenue. The curve suggests that beyond a certain point, higher tax rates become counterproductive because they discourage economic activity, encourage tax avoidance, and drive capital to lower-tax jurisdictions. The Laffer Curve became a cornerstone of supply-side economics and influenced Reagan-era tax cuts. However, the optimal rate is debated and varies by economy, time period, and type of tax.
Laffer Curve Example
- 1Arthur Laffer reportedly sketched the curve on a napkin during a 1974 dinner with Dick Cheney and Donald Rumsfeld.
- 2Proponents argued that Reagan's tax cuts from 70% to 28% would increase revenue by stimulating growth.
- 3Some Scandinavian countries maintain high tax rates (50%+) with strong revenue, suggesting the peak of the curve varies by country.
Related Terms
Supply-Side Economics
An economic theory arguing that tax cuts, deregulation, and policies that increase production capacity drive economic growth more effectively than demand-side stimulus.
Fiscal Policy
Government decisions about taxation and spending used to influence economic conditions and achieve macroeconomic goals.
Economic Growth
The increase in the production of goods and services in an economy over time, typically measured by the growth rate of real GDP.
Aggregate Supply (AS)
The total output of goods and services that firms in an economy are willing to produce at various price levels during a given time period.
Fiscal Multiplier
The ratio measuring how much GDP changes in response to a change in government spending or taxation, indicating the effectiveness of fiscal policy.
GDP (Gross Domestic Product)
The total monetary value of all finished goods and services produced within a country's borders in a specific time period.
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