Denmark has the highest tax revenue relative to its economy size, with a tax-to-GDP ratio of 45.3%. This is more than double the rate collected in the United States. The country's tax system includes high income taxes, consumption taxes, and property levies, which finance universal healthcare, free education, and social security. Denmark consistently ranks among the world's happiest nations despite its substantial tax burden. Its tax system is a key factor in the country's high standard of living.
Seven of the top 10 highest-ranking countries are in Europe, with the Nordic region being particularly dominant. Bulgaria ranks second globally with a tax-to-GDP ratio of 38.8%, followed closely by Sweden at 38.7%. Bulgaria's relatively low headline tax rates, including a flat 10% corporate and personal income tax, contribute to its high ranking due to value-added tax and social security contributions. Sweden's welfare model is underpinned by a 25% VAT and extensive social contributions.
Two African nations, Namibia and Eswatini, feature in the global top 10 most taxed economies. Namibia ranks fourth globally with a tax-to-GDP ratio of 35.3%. The country's mining sector, which produces diamonds, uranium, and other minerals, generates substantial corporate tax revenue. A relatively small population and a large formal economy also contribute to its high ratio. Eswatini ranks eighth alongside Luxembourg at 30.7%, with much of its tax revenue coming from customs duties, income taxes, and VAT.
Finland rounds out the top 10 with a tax-to-GDP ratio of 30.4%, making it the fourth Nordic country in the list. The country's tax system combines progressive income taxes, a 24% VAT, and extensive social contributions that fund free education and universal healthcare. Other countries in the top 10 include Iceland, New Zealand, Norway, Luxembourg, and Eswatini. The rankings are based on data from the International Monetary Fund (IMF).
According to Daniel Kathali, an economist, the differences in tax-to-GDP ratios across countries reflect how governments structure their tax systems and fund public services. Nordic countries generally have broad tax bases that help finance extensive public programmes, including education, healthcare, and social security. In contrast, economies like the United States rely more heavily on private spending in areas such as healthcare and retirement.
Kenya's tax-to-GDP ratio stands at around 14%, well below the IMF's recommended threshold for sustainable public debt. Kathali explains that Kenya's low ratio is not due to low tax rates but rather non-compliance caused by the nature of the Kenyan economy. The informal sector, which accounts for a large portion of the GDP, is often non-compliant with tax regulations. This has constrained revenue growth, leading the government to increase taxes on salaries, customs, and VAT.
The Kenya Revenue Authority collected KSh 2.038 trillion by the end of March 2026, falling short of its KSh 2.122 trillion target for the period. In comparison, the US tax-to-GDP ratio stands at just 19.5%, less than half of Denmark's. Countries like Kuwait, Qatar, Bahrain, and Oman have even lower tax-to-GDP ratios due to their reliance on resource revenues.
Key points
- Denmark has the highest tax-to-GDP ratio globally at 45.3%.
- Namibia and Eswatini are the two African countries in the top 10 most taxed economies.
- Kenya's tax-to-GDP ratio is around 14%, below the IMF's recommended threshold.
