With lower nominal GDP growth and bond yields having risen substantially since the pandemic, stronger primary balances are needed to keep public debt burdens from increasing. In most advanced economies, including some major economies, gross financial liabilities are again rising more rapidly than GDP due to persistent primary deficits and GDP growth that no longer exceeds the effective interest rate on debt. This is reflected in rising projections for the weighted average of OECD economies’ gross public debt – which is projected to reach 113% of GDP by the end of 2027.
Public finance
Public finance is about government revenues, expenditures, assets and debt and how they impact the economy. Impacts are multiple and far-reaching, ranging from the short-run response to downturns to income distribution, long-term growth and environmental sustainability. Many countries around the world need to tackle high and rising public debt while responding to mounting spending pressures from ageing, defence and climate and preserving social support to those most in need. The OECD works with governments to help them address these challenges.
Latest public finance recommendations from the OECD Economic Outlook
Public debt has been rising more rapidly than GDP
Higher defence spending will absorb fiscal room for manoeuvre
Many advanced economies have begun to implement plans to bolster defence spending, including NATO countries who have committed to allocating 3.5% of GDP to core military spending by 2035. Near-term gains to economic activity are expected in countries borrowing to finance re-armament, with potentially larger payoffs in economies with ample spare capacity and established local defence industries. Lasting benefits may, however, be modest in many small, highly-open economies heavily reliant on purchases of foreign-produced military equipment. Some countries can afford to sustain higher debt-financed expenditure on defence for some time, with debt ratios climbing above current levels. However, even in these countries, concurrent pressures to spend more on health, long-term care and climate measures will eventually absorb fiscal room for manoeuvre, requiring spending reallocation or higher revenues.
Fiscal consolidation is needed in many countries to keep public debt sustainable
Optimal fiscal adjustments will vary across economies and depend on initial conditions, including the state of the public finances and the economy. A reduction and reallocation of government outlays would be desirable where debt needs to be lowered and spending is high relative to the size of the economy. Higher tax receipts may also be needed where there is room to lift revenues in a manner that limits distortions to work incentives and economic activity. Fiscal consolidation should in all cases be guided by credible medium-term plans, supported by strong fiscal institutions.
OECD Public Finance Dataset
To investigate how public finances can best be designed to promote long-run growth and address inequality, it is essential to have comprehensive, cross-country comparable data on government spending and revenues. By identifying key variables of public finance across as many countries as possible, and with a time series element to allow for longitudinal analysis, the OECD Public Finance Dataset provides a detailed data set to contribute to an evidence-based debate on shaping growth-enhancing and equality-promoting fiscal policies.
Latest Ecoscope blog posts
-
oecdecoscope.blog27 March 2026 -
oecdecoscope.blog15 October 2025 -
oecdecoscope.blog24 June 2025
Public finance related reports
-
21 PagesThis paper provides an assessment of the national medium-term fiscal structural plans submitted by EU countries and compares them to the prior guidance issued by the Commission. The national plans are instrumental in ensuring sustainable fiscal policy in the euro area, while providing fiscal paths tailored to country-specific macroeconomic conditions and needs. To gauge the national plans and their effects at the euro area level, we focus on three related issues: to what extent were fiscal paths revised following the initial guidance by the Commission, how much fiscal consolidation do national plans imply for the euro area on aggregate, and how well is public investment spending protected under national plans. We find that the national fiscal plans for some countries imply less fiscal consolidation than the prior guidance and that the amount of fiscal consolidation at the euro area level embedded in the national plans between 2025 and 2028 is less than envisioned by the Commission in its prior guidance. Finally, even before recent activation of escape clauses permitting higher defence spending in several countries, public investment seemed protected in most EU countries, despite planned fiscal tightening in the agreed national plans.Learn more
-
33 PagesReforming Brazil’s consumption tax system has long been acknowledged as a crucial policy priority, as the present fragmented system raises the costs of doing business, distorts production chains and obstructs inter-state trade. In late 2023, Brazil successfully passed and is currently implementing a major tax reform that will address the challenges related to the current complex system. Implementing a value added tax system in a federal country that shares the authority to levy VAT among the federal and subnational governments presents challenges. This paper analyses several aspects of these challenges and describes possible solutions, based on the policy experiences of other countries. It also discusses core design features of the new dual value added tax, its management and the transition towards the new regime.Learn more
-
42 PagesGovernment expenditures average around 40% of GDP across OECD countries. With advanced economies facing fiscal challenges - including large deficits, high debt and rising ageing, climate and defence costs and already high taxes - there is strong interest in understanding and managing public spending. This paper explores the composition and determinants of government spending across OECD countries. It uses the classification of functions of government (COFOG) to analyse government expenditure across 13 key spending categories over the period 1995-2019 for 28 OECD countries with a view to identifying countries with exceptionally high spending in specific areas.Learn more
-
60 PagesPopulations are ageing in most OECD countries, as life expectancy increases and fertility rates decline. Living longer and ageing in better health are undoubtedly major accomplishments. The rapid ageing of societies, however, also poses important challenges. This paper provides a comprehensive assessment of the long-term implications of population ageing for public finances, drawing on the OECD Long-Term Model and previous analytical work. It develops an analytical framework to quantify the fiscal effects of ageing, examining rising pressures on pensions, health, and long-term care spending, as well as potential impacts on public revenues and debt dynamics The paper highlights the need for a comprehensive policy response that combines fiscal and structural reforms, providing policy directions to address the fiscal impact of population ageing through promoting healthy ageing, reforming pension systems, enhancing efficiency in healthcare and long-term care, broadening tax bases, and boosting labour force participation among older workers and under-represented groups. These policy efforts can be complemented by measures to boost fertility and immigration.Learn more
-
53 PagesWe analyse 34 debt reduction episodes since the late 1970s in OECD countries, focussing on the contribution from the change (often an increase) in the primary balance. This change is decomposed into three components (cyclical, discretionary and one-off) as well as into a detailed set of budget items on both revenue and expenditure sides, using an updated version of the OECD Public Finance Dataset. Favourable cyclical conditions have been the main driver of declining debt-to-GDP ratios, both through denominator effects and through an improvement in primary balances. Discretionary fiscal consolidation efforts, mostly on the expenditure side, have been a more modest driver of debt reduction during the episodes themselves, but have taken place on a larger scale in the run-up to the episodes. During debt reduction episodes, overall expenditure restraint appears to have been accompanied by growth-friendly shifts in the composition of public spending, mainly to the benefit of human capital formation. This reflects broader trends, such as the generalised increase in health expenditure, but also containment of spending on pensions and subsidies. On the revenue side, corporate income taxes have made the largest contribution to the improvement in primary balances.Learn more
-
35 PagesThe paper reviews the diverse experience of OECD countries in establishing and running independent fiscal institutions, offering insights that could be useful for Latin American countries seeking to set-up and strengthen those institutions in the region. Through cluster analysis, we identify different types of OECD independent fiscal institutions and draw practical lessons from cases studies. We also identify key features that could serve as a road map for Latin American countries in their efforts to establish or enhance independent fiscal institutions.Learn more
-
40 PagesThis study investigates the capacity of governments to reallocate spending across different functions of the government. It mobilises the COFOG dataset for the period 1996 - 2017, which allows comparing public spending mixes at detailed levels in ways that are consistent across countries and over time.Three main empirical findings are established. Firstly, countries differ in their propensity to reallocate public spending across functions and countries that reallocate more are also countries with sounder governance and tighter fiscal rules in place. Secondly, obstacles to reallocation are identified, with governments avoiding nominal cuts, especially in health and social expenditures. Thirdly, while the analysis underlines some degree of convergence among OECD countries in terms of public spending allocation, this convergence is not universal. A cluster of Nordic countries persists, and Greece is identified as diverging from the rest of countries included in the sample.Learn more
-
61 PagesBusiness investment in OECD countries has remained weak, in particular since the 2008 global financial crisis. At the same time, the cost of capital has significantly and steadily decreased over the last thirty years, reflecting a fall in both interest rates and corporate tax rates. This raises the question of whether business investment still responds to the cost of capital and thus whether corporate tax policy can support investment. This paper analyses trends in business investment and in the cost of capital in OECD countries over the past three decades. Then, it investigates empirically the sensitivity of business investment to corporate taxation, and how this sensitivity varies across firm, investment and tax-design characteristics. Panel regressions at the firm and industry levels confirm that business investment rates are negatively related to corporate taxation, measured by country-level forward-looking effective tax rates. However, the tax sensitivity of business investment has fallen significantly since the global financial crisis. It also differs significantly across firms, assets, and corporate tax design characteristics. Overall, the estimation results suggest that a nuanced and granular approach to corporate tax policy, accounting for heterogeneity in tax sensitivity, is needed to support investment effectively. The paper discusses possible policy options, including the reduction of non-profit taxes, the use of targeted corporate income tax instruments, and the use of more generous capital allowances where they may induce strong investment responses.Learn more