Fiscal capacity

Based on Wikipedia: Fiscal capacity

In 2000, Friedrich Schneider and Dominik Enste calculated a number that reveals the fragility of the modern state: while the informal economy in wealthy OECD nations averages a manageable 15% of GDP, in developing states, the median swells to 37%. In Nigeria, that figure climbs to a staggering 76%. This is not merely a statistic of economic underperformance; it is a map of where the state's reach ends and where the law dissolves into silence. When three-quarters of a nation's economic activity happens in the shadows, the government's ability to build roads, fund schools, or protect its citizens evaporates. This is the core reality of fiscal capacity: the ability of a state to extract the revenues necessary to exist, measured not just by the money in the treasury, but by the depth of its administrative reach into the lives of its people.

Fiscal capacity is often misunderstood as simply the power to tax. While taxes are the lifeblood of public finance, the concept is far more architectural. It is the ability of the state to raise revenues to provide public goods and carry out its functions, given a specific administrative and fiscal accounting structure. In the lexicon of economics and political science, you might hear it called tax capacity, extractive capacity, or the power to tax. Yet, to view it solely through the lens of a tax collector's ledger is to miss the machinery that drives it. A state can have a high statutory tax rate on paper, but if it lacks the inspectors to audit returns, the courts to enforce compliance, or the bureaucracy to process payments, that rate is a fiction. Fiscal capacity is the state's investment in itself—the training of tax inspectors, the efficiency of the revenue service, and the monitoring structures that turn a promise of payment into a deposit in the national bank.

This investment is not optional; it is the bedrock of state-building. When a government successfully extracts revenue, it unlocks the ability to fund infrastructure development, health systems, education, military defense, and social insurance. These are the public goods that distinguish a functioning society from a collection of individuals. Consequently, fiscal capacity is inextricably linked to economic growth and development. Wealthier, developed countries do not simply happen to be richer; they have historically made successive investments in their fiscal capacities over time. They have built the administrative muscles required to collect a much larger share of their income in taxes than their poorer counterparts.

The patterns of this evolution are stark and well-documented. In their 2012 analysis of 73 countries since 1800, economists Besley and Persson outlined a set of "stylized facts" that describe the trajectory of state power. The most obvious is that rich countries collect significantly higher tax revenue than poor countries, even when statutory rates are comparable. But the composition of that revenue tells a deeper story. Rich nations rely heavily on income taxes, levied directly on the earnings of citizens and corporations. Poor nations, conversely, rely disproportionately on trade taxes—tariffs on imports and exports. This is not a matter of preference, but of capacity.

The distinction between income taxes and trade taxes is the difference between a sniper and a broad net. Income taxes require a sophisticated bureaucracy. To tax an individual's income, the state must know who that person is, where they live, what they earn, and how they spend. It requires a registry of the population, a system to track wages, and a legal framework to handle evasion. It demands a culture of compliance and the technological infrastructure to monitor it. Trade taxes, however, are blunt instruments of efficiency for the weak state. They can be collected at a handful of border checkpoints or ports. A customs officer needs only to see a ship dock or a truck cross a line to levy a fee. It requires far fewer administrative resources and does not depend on the state knowing the details of every citizen's life.

Here lies the paradox of development. Optimal taxation theory suggests that income and consumption taxes, such as the Value-Added Tax (VAT), are economically efficient. They distort markets less and raise revenue with less friction. Corporate income taxes, tariffs, and seignorage (the profit a government makes from issuing currency) are often considered inefficient because they can stifle trade and investment. Yet, in the real world of developing nations, the "inefficient" tariffs persist. Why? Because the "efficient" taxes are often impossible to collect.

The barrier is the informal economy. This is the sector of the economy that operates outside the government's monitoring. It exists when the general population can easily evade taxes due to low tax morale, poor governance, or insufficient administrative resources. When a government in a developing country attempts to raise income taxes to modernize its revenue stream, it often triggers a defensive reaction. Taxpayers, fearing the burden, shift their activities from the formal sector to the informal. A shopkeeper stops issuing receipts; a factory owner pays workers in cash; a farmer sells crops in the black market. The tax base shrinks precisely as the tax rate rises.

This dynamic explains why developing countries cannot simply copy the tax codes of the West. In a society with a large informal economy, raising taxes does not automatically generate more revenue; it often generates more evasion. The state is forced to choose between a theoretically efficient tax system that collects nothing and an inefficient one that actually funds the government. As Emran and Stiglitz argued in 2005, tariffs may provide a "less distorting source of tax revenue" in these specific contexts. If increasing income taxes drives the entire economy underground, then the government is better off collecting a tariff at the border, even if it theoretically hampers trade. The goal is not abstract efficiency; it is the survival of the state's ability to function.

The human cost of weak fiscal capacity is measured in the absence of public goods. When the state cannot extract revenue, it cannot build the hospitals that save lives, the schools that educate the next generation, or the roads that connect farmers to markets. In Nigeria, where the informal economy consumes 76% of GDP, the state's inability to tax this vast sector leaves the government starved of resources. The result is a cycle of poverty and weak governance. Without the revenue to fund a professional civil service, the state cannot monitor the population. Without monitoring, compliance remains low. Without compliance, the state remains poor.

This is not merely an administrative failure; it is a political and social fracture. Tax morale—the willingness of citizens to pay taxes—is deeply rooted in the social contract. In states where the government is viewed as corrupt, predatory, or absent, the moral obligation to pay taxes dissolves. Why should a citizen pay income tax if the money disappears into the pockets of elites or if the government offers no protection in return? In such environments, the informal economy becomes a rational choice, a survival mechanism for a population that has been excluded from the benefits of the state. The tax inspector is not seen as a public servant but as a threat to be avoided.

The contrast with developed nations is illuminating. In the United States, the Internal Revenue Service (IRS) represents a massive, technologically advanced apparatus capable of tracking income, assets, and transactions. This infrastructure allows the US to rely heavily on income taxes, which are more equitable and efficient than tariffs. The state knows its citizens, and the citizens, broadly speaking, comply. This compliance is not just about fear of punishment; it is about the expectation of return. The revenue collected funds a social safety net, public education, and infrastructure that benefits the payer. This cycle of extraction and provision reinforces the state's legitimacy and strengthens its fiscal capacity.

However, the path to this strength is not linear. Rich countries have made successive investments in their fiscal capacities over time, often in response to crises. War, in particular, has been a catalyst for fiscal expansion. The need to fund massive military operations forced states to build the bureaucracies necessary to extract resources from their populations. But the legacy of these investments is not just the money raised; it is the permanent expansion of the state's reach into the private lives of its citizens. The ability to tax is the ability to know, and the ability to know is the foundation of modern governance.

For developing nations, the challenge is to break the cycle of informality. This requires more than just changing tax laws; it requires a fundamental transformation of the state's relationship with its people. It demands investment in the "state structures"—the monitoring, administration, and compliance mechanisms that make extraction possible. It requires building a tax administration that is efficient, transparent, and capable of enforcing policies. It requires a political will to combat corruption and ensure that tax revenue is actually spent on public goods.

The puzzle of why developing countries cannot simply adopt efficient tax types is a puzzle of capacity, not just policy. You cannot have a high-tech tax system in a low-tech society. You cannot enforce income taxes where the economy is largely cash-based and unrecorded. The solution lies in a gradual, deliberate build-up of administrative capability. This might mean starting with the easier-to-collect taxes, like tariffs or consumption taxes on specific goods, and using that revenue to fund the expansion of the tax administration. Over time, as the state becomes more capable, it can broaden its base, moving toward income taxes and away from the distortive trade taxes that have long constrained its growth.

The stakes of this transition are incredibly high. A state with low fiscal capacity is a state that is vulnerable. It cannot respond to economic shocks, it cannot invest in long-term development, and it cannot protect its citizens from external threats. It is a state that exists in name only, its authority limited to the capital city and the border crossings. In contrast, a state with strong fiscal capacity is a state that can shape its own destiny. It can plan for the future, invest in its people, and build a society that functions on the principles of rule of law and public accountability.

The data is clear: the gap between the rich and the poor is, in large part, a gap in fiscal capacity. Rich countries collect a much larger share of their income in taxes, and they do so with a system that is more efficient and less distorting. Poor countries struggle with a system that relies on inefficient taxes and a vast informal economy that eludes their grasp. But this is not a permanent condition. The history of state-building shows that fiscal capacity can be built. It requires investment, political will, and a recognition that the ability to tax is not just a financial tool, but the very essence of the state's power to provide for its people.

The informal economy is not a sign of freedom; it is a sign of exclusion. When people retreat into the shadows, they are not escaping the state; they are being forced out of it by a state that cannot reach them. The solution is not to punish the informal sector, but to expand the formal sector's capacity to include it. This means building trust, improving governance, and creating a system where paying taxes is seen as an investment in a shared future rather than a burden to be evaded.

As we look at the global landscape, the divergence is stark. In Hong Kong and Singapore, the informal economy is a mere 13% of GDP, a testament to efficient governance and high compliance. In Nigeria, it is 76%, a testament to a state struggling to find its footing. The difference is not just in the numbers; it is in the lives of the people. In the former, public goods are abundant, and the state is a partner in development. In the latter, the state is often absent, leaving citizens to fend for themselves in a fragmented economy.

The path forward for developing nations is difficult. It requires a long-term commitment to building the administrative machinery of the state. It requires a shift from viewing taxes as a burden to viewing them as the price of civilization. And it requires a recognition that the "inefficient" taxes of today may be the necessary stepping stones to the "efficient" taxes of tomorrow. The goal is not to mimic the West, but to build a fiscal capacity that is appropriate for the specific political, social, and economic conditions of each nation.

Ultimately, fiscal capacity is the measure of a state's ability to fulfill its promise. Can it protect its citizens? Can it educate its children? Can it build the infrastructure that drives prosperity? The answer lies in the ability to extract revenue. It is a complex, messy, and often contentious process, but it is the foundation upon which all other state functions rest. Without it, the state is a ghost, haunting the landscape but unable to touch the lives of the people it claims to govern. With it, the state becomes a force for progress, capable of turning the raw potential of a nation into the reality of a thriving society.

The story of fiscal capacity is the story of modern statehood. It is a story of the struggle between the reach of the government and the resistance of the governed. It is a story of how the right to tax became the duty to govern. And it is a story that is still being written, in every developing nation where the tax collector still struggles to find the taxpayer, and where the path from informality to formality remains the most critical journey a state can take.