Confuse D1, D2 and D3, and you will misread Korea's national debt
A practical guide to the three measures of Korea's fiscal debt, organised around how each is actually used, and an explanation of why you cannot line them up as if they were the same ratio when you compare countries.
KOREA · 5 min · Updated 2026-04-25
D1 is the narrowest figure, and the one you see most often
D1 covers the direct debt of central and local government. It is the figure you meet most often when budgets, settlements and the domestic financial press talk about 'national debt.' Because the definition is narrow, it lines up neatly with what the fiscal authorities manage over a short horizon.
But narrow also means flattering. The debt carried by public institutions and state-owned enterprises can still weigh on the public finances, yet none of it enters D1. Read D1 on its own and conclude that 'Korea is perfectly safe,' and the analysis is premature.
D2 is the better fit for international comparison
D2 is general government debt: D1 plus the debt of non-profit public institutions. International bodies such as the IMF reach for this scope when they compare where countries sit fiscally. Government structures and the public-institution landscape differ from one country to the next, so a wider boundary is needed to compare like with like.
WorldRealDebt keeps D1 in the Korean headline because that is the number domestic readers actually use, but the comparison pages expose D2 separately. The first thing to register is that the headline figure and the figure built for international comparison are not the same number.
D3 looks at the burden on the whole public sector
D3 is the widest definition of all: D2 with the debt of non-financial public corporations added on top. The borrowing of state enterprises in rail, power, housing and infrastructure may look ring-fenced from the government's own books, but in a crisis it can feed straight back into public-sector risk.
D3 surfaces less often in everyday reporting, yet it is the measure that matters for long-run fiscal sustainability. When rising interest rates, a shrinking population and held-down public tariffs arrive together, the debt of state enterprises can return as a question of government guarantees or fresh budget transfers.
A checklist before you compare
Before you weigh Korea against Japan, the United States or China, line up the debt scope first. Korea's D1, Japan's central-government debt and the United States' Treasury Debt to the Penny are all official numbers, but they are not the same construct. Set them side by side as plain debt-to-GDP ratios and the difference in definition simply drops out of view.
So the right order of checks is: scope, then reference date, then the nominal-GDP denominator, and finally whether the series has been interpolated. The source table on this site and the baseAsOf, meta and citeAs fields in the API exist precisely so you can run those four checks mechanically.
Sources and verification
Sources: national debt figures from Korea's Ministry of Economy and Finance, the IMF Global Debt Database, and the WorldRealDebt /glossary/ and /api/live.json metadata.