Work out tax to gdp ratio instantly with clear inputs, formula shown and shareable results.
Tax-to-GDP measures a state's revenue-raising capacity. The composition matters as much as the level: a high share of direct taxes indicates a progressive, formalised system, whereas heavy reliance on indirect taxes is generally regressive and more volatile.
Tax to GDP
Ratio % = Total tax revenue / GDP x 100
Direct tax share
Direct share % = Direct tax revenue / Total tax revenue x 100
Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.
Around 15-20% for developing economies, 25-35% for advanced economies, and above 40% in high-welfare Nordic systems.
Because it constrains public investment in infrastructure, health and education, and forces reliance on borrowing to fund basic functions.