West Africa’s economy is set for steady growth of around 4.6% in 2026, creating a prime opportunity to strengthen its fiscal foundations. With a five-year average tax-to-GDP ratio of just 9.9%, boosting domestic resource mobilisation can unlock new funding for infrastructure, social services, and long-term development, paving the way for sustainable, inclusive prosperity.
The global average tax-to-GDP ratio stands at approximately 34% for OECD countries and around 16.5% for emerging market economies, according to the IMF’s World Revenue Longitudinal Data. This means that even as West African economies expand through hydrocarbon discoveries in Senegal and Niger or agro-processing booms in Côte d’Ivoire, the state captures less than half of the fiscal resources typical of its global peers. The result is a region perpetually rich in potential but structurally starved of the public investment capital needed to convert cyclical growth into structural transformation.
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The 20% tax-to-GDP benchmark established by the West African Economic and Monetary Union is not arbitrary; it is calculated as the minimum fiscal threshold a state needs to finance basic public goods independently, without resorting to inflationary deficit financing or excessive external borrowing. Yet, as of the most recent monitoring report from the WAEMU Commission, none of the eight member states has consistently met this target. The United Nations Development Programme estimates that Africa requires an additional $194 billion annually to meet the SDGs by 2030, with a significant portion needed for infrastructure, health, and education, precisely the sectors that low tax revenues leave chronically underfunded. The convergence criterion thus stands not as a technical target but as a stark indicator of the distance between West Africa’s fiscal reality and its developmental aspirations.
Data from the World Bank’s International Debt Statistics shows that the average external debt stock of sub-Saharan African countries doubled between 2010 and 2023, while the composition of this debt shifted dramatically towards more expensive private creditors. For West African nations, debt servicing now consumes a growing share of revenue, in some cases exceeding 30% of government expenditure. This creates a fiscal strangulation cycle: low tax revenue necessitates borrowing; borrowing consumes rising shares of future revenue through interest payments; and the remaining fiscal space for investment in growth-enhancing sectors shrinks, depressing the very economic activity that generates taxable income. The AfDB’s 2026 Regional Economic Outlook specifically warns that without revenue reform, the debt burden will tip several WAEMU countries from moderate to high risk of debt distress within this decade.
The new hydrocarbon projects in Senegal and Niger driving growth projections exemplify a critical challenge in resource governance. Historically, extractive industries in Africa have been enclave sectors that generate significant GDP growth and export earnings but contribute disproportionately little to domestic tax revenues, due to regressive fiscal regimes, extensive tax holidays, and profit-shifting mechanisms. The Natural Resource Governance Institute has documented that African governments capture, on average, less than 40% of the economic rents from their extractive sectors, compared to over 70% captured by countries like Norway. Senegal’s entry into the league of hydrocarbon producers, with major gas projects like the Grand Tortue Ahmeyim, provides a critical test case.
The International Labour Organisation estimates that informal employment accounts for over 85% of total employment in West Africa, with the informal sector contributing an estimated 50–65% of GDP. This vast economic activity operates largely outside the tax net. The challenge is not one of taxing the poor; it is about capturing revenue from a burgeoning class of informal-sector entrepreneurs, traders, and service providers who are neither fully exempt from tax obligations nor effectively registered. A study by the International Centre for Tax and Development found that simplifying registration procedures, combined with presumptive tax regimes that estimate turnover based on observable indicators rather than requiring full double-entry bookkeeping, can increase tax compliance among micro and small enterprises by up to 35%. The digitisation of tax administration, as recommended by the AfDB, is the most promising tool to crack this nut, but it requires significant upfront investment in IT infrastructure and taxpayer education to overcome the deep-seated distrust that many informal operators hold towards state revenue agencies.
The strategy of deepening regional financial integration through the Bourse Régionale des Valeurs Mobilières (BRVM) in Abidjan is critical because it addresses the other side of the fiscal equation: the mobilisation of long-term, local-currency capital. The BRVM, which serves all eight WAEMU countries, has a market capitalisation representing a fraction of the region’s combined GDP, compared to stock markets in more advanced economies where market capitalisation often exceeds GDP. A study by the African Securities Exchanges Association indicates that African institutional investors, including pension funds and insurance companies, hold over $1.8 trillion in assets under management, much of which is invested offshore or in low-yield government securities due to a lack of domestic investment-grade instruments. By developing the BRVM’s capacity to list infrastructure bonds and green bonds, and by creating harmonised regulatory frameworks for cross-border portfolio investment, the region can recycle its own savings into the very energy and transportation projects that current fiscal constraints starve of capital. This reduces reliance on volatile and dollar-denominated external debt while building a domestic constituency of bondholders invested in the economic stability of the region.
Côte d’Ivoire’s projected growth of 6.5% and its ambition to achieve upper-middle-income status by 2030 encapsulate the entire region’s opportunity and fragility. The Ivorian economy has been a standout performer since the end of the post-electoral crisis, driven by investments in infrastructure, cocoa processing, and a growing services sector. However, an IMF Article IV consultation report has flagged that despite this stellar growth, the country’s tax-to-GDP ratio, while improving, remains below the WAEMU target. The government’s National Development Plan explicitly identifies the formalisation of the economy and the broadening of the property tax base as strategic priorities. The property tax is particularly emblematic: across Africa, property taxes yield less than 0.5% of GDP compared to over 2% in OECD countries, yet they are among the most economically efficient taxes, distorting economic decisions the least. Côte d’Ivoire’s fiscal trajectory over the next five years will serve as a proof of concept for whether strong growth can, with deliberate policy effort, be converted into strong fiscal capacity, or whether the WAEMU convergence criteria will remain permanently aspirational.
The report rightly emphasises that rebuilding the social contract is fundamental to improving tax compliance. This is not a soft, rhetorical point; it is a finding with rigorous empirical backing. The Afrobarometer survey network has consistently found that Africans’ willingness to pay taxes is strongly correlated with their perception of government performance in delivering services. In countries where citizens rate the government’s performance in health and education highly, tax morale is significantly higher. Conversely, where corruption is perceived as endemic and public services are absent, tax evasion is rationalised as a form of self-defence against a predatory state. A seminal paper published in the Journal of Development Economics on tax morale in sub-Saharan Africa found that a one-point improvement on a five-point scale of perceived government effectiveness correlated with a measurable increase in the likelihood of voluntary tax payment. Thus, tax modernisation that is not accompanied by visible, tangible improvements in the quality of clinics, schools, and roads is unlikely to succeed, because it demands a fiscal quid pro quo that citizens will resist if the “quo” never materialises.
The estimate that West Africa can close an annual development financing gap of $90–100 billion through domestic resource mobilisation is both a measure of the problem and the solution. This figure, originating from the African Economic Outlook series, aligns with broader continental estimates that illicit financial flows, tax avoidance by multinational corporations, and untaxed high-net-worth wealth account for a combined drain that exceeds total annual official development assistance and foreign direct investment combined. The Tax Justice Network’s State of Tax Justice report estimates that African countries lose over $25 billion annually to multinational corporate tax abuse alone. Closing this gap through tax base broadening, aggressive negotiation of double taxation treaties, and the establishment of transparent beneficial ownership registries to prevent profit shifting would, in principle, free West African states from their structural dependence on external finance. The policy implication is radical but straightforward: the money already exists within the regional economy; it is simply not flowing through the treasury.
West Africa’s growth narrative is currently a story of a high-performance engine mounted on a broken chassis of fiscal institutions. The projected 4.6% growth rate for 2026 is real and reflects genuine entrepreneurial dynamism and resource potential, but it will remain a hollow metric if it continues to bypass the public treasury. The path to transformation lies in a sequenced, politically difficult reform agenda that begins with the administrative modernisation of tax collection, digitisation, simplified regimes, and property cadastre, and deepens into a political project of re-legitimising the state through service delivery. The region’s ambition to become a globally competitive, self-reliant economic bloc depends entirely on whether its governments can convert the paradox of “growth without revenue” into a virtuous cycle of “growth through investment”, where every percentage point of GDP growth mechanically increases the fiscal capacity to fund the next round of human and physical capital development. This is not a technical tax adjustment; it is the foundational act of reclaiming fiscal sovereignty from a structurally leaky system.
