What Is the Tax Burden Rate
The national burden rate is the ratio of total tax and social security contributions to national income. According to OECD 2023 data, France (46.1%) and Denmark (45.3%) rank highest, while Mexico (16.9%) and Colombia (19.7%) rank lowest. Japan stands at 33.5%, nearly identical to the OECD average of 34.0%.
The national burden rate indicates "how much of citizens' income the government collects," but its interpretation is not straightforward. A high burden rate signifies "heavy taxation" on one hand, but also funds comprehensive public services (healthcare, education, pensions, childcare support) on the other. The level of the burden rate alone cannot determine citizens' actual standard of living.
Impact on Disposable Income Rankings
MyRank's income ranking uses pre-tax gross income as its basis. However, the amount actually available for spending is disposable income (net income) after deducting taxes and social insurance premiums. At the same gross income of 5 million yen, Japan (effective tax rate approximately 20%) and Belgium (effective tax rate approximately 40%) produce a difference exceeding 1 million yen in take-home pay.
Furthermore, adding the value of public services received after tax makes comparison even more complex. In Denmark, high tax rates fund free healthcare, free university education, and generous unemployment insurance. When these "in-kind benefits" are monetized, the actual standard of living exceeds what nominal disposable income suggests.
Progressive and Regressive Taxation - Who Bears the Burden
Income tax is progressive (higher earners face higher rates), but consumption tax is regressive (lower earners pay a higher proportion of income). Even when the overall national burden rate is identical, the distribution of that burden varies dramatically depending on tax composition.
Nordic countries impose high rates on both income and consumption taxes, but cash transfers to low-income households and public services produce substantial redistributive effects. Conversely, in countries with consumption tax-centered systems, even a nominally low burden rate can weigh heavily on low-income earners in practice. A single number - the national burden rate - cannot reveal this distributional fairness.
Social Insurance - The Invisible Burden
Of Japan's 33.5% national burden rate, tax accounts for 25.1% and social security contributions for 8.4%. However, including employer-side contributions makes the effective social insurance burden considerably larger. Economists interpret employer-paid social insurance premiums as being indirectly borne by workers through lower wages (the incidence question).
Pay slips show "take-home pay" after income tax and employee social insurance deductions, but employer-side contributions are invisible. Including this "hidden burden," Japan's effective burden rate is estimated to be 5-8 percentage points higher than official statistics suggest. Even when rankings indicate a "light tax burden," the impression may shift once invisible contributions are factored in.
The Relationship Between Tax Burden and Happiness
Counter-intuitively, national burden rates and happiness scores are positively correlated. The top-ranked countries in the World Happiness Report (Finland, Denmark, Switzerland) all have high burden rates. The pathway suggested is that high tax burdens fund comprehensive social security, which reduces life anxiety and consequently elevates happiness.
However, this correlation does not prove causation. In societies with high social trust, citizens accept heavy burdens because they trust taxes will be used appropriately, and this trust enables comprehensive public services. Simply raising tax rates in low-trust societies would not produce the same outcome. Institutional design and social trust are inseparable.