Is Uruguay Taxing Away Its Own Growth? The Laffer Curve Revisited

Uruguay’s long-term challenge may not be public revenue itself, but a tax structure that weakens incentives to invest, innovate and produce.

Is Uruguay Facing the Laffer Curve? The Cost of a State That Suffocates Its Own Tax Base
By Dr. Nelson J. Mosco Castellano

Uruguay faces a structural crossroads that no longer allows for delays or superficial diagnoses.
Year after year, public debate tends to focus obsessively on the day-to-day balance of the fiscal accounts, losing sight of the broader picture: the long-term sustainability of our economy and the alarming loss of dynamism in the private sector.
To understand the true scope of this phenomenon, it is essential to bring to the table an economic concept that is as classic as it is underestimated within the corridors of political bureaucracy: the Laffer Curve.
The premise, formulated by American economist Arthur Laffer, follows an uncompromising logic. There is a tipping point at which tax rates become so high that they begin to destroy the incentives to produce, invest and work.
Once that threshold has been crossed, increasing taxes no longer raises additional revenue; instead, it shrinks the tax base and encourages informality.
When we take a close look at Uruguay’s tax structure, the conclusion is as clear as it is concerning: our country is operating dangerously deep within the zone of diminishing returns described by that curve.
Uruguay’s formal tax burden fluctuates between 26% and 28% of GDP.
At first glance, this figure may appear broadly consistent with regional averages or even below those of the OECD.
However, such an assessment ignores the realities of economies of scale.
For a small domestic market, burdened by structurally high operating costs and energy and fuel prices that weigh like an anchor, sustaining a State of this size requires marginal tax rates that suffocate the productive fabric.
The result is not always an immediate nominal decline in tax collections, but something far more damaging: a silent and constant erosion of economic potential.
The clearest symptom of this exhaustion can be found in the Value Added Tax (VAT).
With a standard rate of 22%, Uruguay has one of the highest consumption tax rates on the continent.
Here, the “Laffer effect” is not merely a theoretical abstraction; it is evident in the reality of our border regions.
Whenever the tax gap with neighboring countries becomes unsustainable, consumers and merchants vote with their feet, shifting economic activity toward informality or smuggling.
A gradual and strategic reduction in VAT would not necessarily deprive the State of revenue.
On the contrary, it would formalize transactions, reduce the cost of living for citizens and ultimately broaden the effective tax base.
In the area of personal income, the outlook is no more encouraging.
The highly progressive structure of the Personal Income Tax (Category II), together with the IASS, which quickly rises to marginal rates of up to 36%, effectively functions as a direct tax on talent and additional effort.
In key sectors of the knowledge economy—including independent professionals, software developers and global consultants—the disincentive is immediate.
When a professional realizes that a substantial share of every additional peso earned will be used to finance public spending, the market’s rational response is to produce less, retire earlier or seek jurisdictions with more competitive tax systems.
We are penalizing productivity precisely when we need it most to achieve the next stage of development.
Perhaps the clearest admission that the system has surpassed its optimum lies in the design of the Corporate Income Tax (IRAE), set at 25%.
The Uruguayan State itself recognizes that collecting this rate uniformly under the general regime would freeze private investment.
To avoid that outcome, it has been forced to construct an elaborate framework of exemptions and special regimes, ranging from COMAP investment incentives under the Investment Law to free trade zones.
While these mechanisms have been indispensable parachutes for attracting capital, they also expose the inconsistency of the overall system: the ordinary tax regime is simply not competitive in today’s world.
Uruguay’s real challenge is not how to collect more revenue by squeezing the same lemons, but how to return to sustained high rates of economic growth.
Maintaining the current tax status quo means condemning the country to stagnation, preserving a State with first-world costs but an economy whose productivity remains severely constrained.
The evidence suggests that a supply-side shock, based on broad tax simplification and lower tax rates, offers the most promising path to restoring oxygen to the private sector.
The initial impact on public finances should be contained through an unwavering commitment to efficiency and the modernization of public spending.
Only by expanding the tax base through a dynamic, formal and free economy will Uruguay achieve genuinely sustainable public revenue.
It is time to understand that, in fiscal policy, less can sometimes truly be more.

Taxation.
Competitiveness.
Growth.

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