Global debt climbed by more than $10 trillion in the first half of 2026 to a record $365.5 trillion, according to the Institute of International Finance’s latest Global Debt Monitor, published on 23 September. Emerging markets accounted for most of the increase, with China a leading driver, while the IIF pointed to strategic AI infrastructure and defence spending as key forces behind the borrowing surge across both advanced and developing economies.
Two ways of reading the same number
On one side of the debate, the headline figure looks less alarming once set against the size of the global economy. Debt-to-GDP ratios have stayed broadly stable in recent years, and IIF panellists noted this owes more to growth and inflation than to any deliberate belt-tightening by governments. Borrowing on this view is simply financing the things economies say they need: data centres and computing power for the AI race, energy security, and rearmament in a more contested world.
On the other side, analysts convened by the IIF, including voices from JPMorgan Asset Management, UBS, Allianz and Fitch Ratings, cautioned that tight credit spreads across sectors leave markets with what they called “little margin for error” if interest rates, inflation or geopolitical shocks move the wrong way. Net government and corporate bond borrowing is on track to reach roughly $29 trillion in 2026 alone, and panellists said a return to the ultra-low interest rates of the pre-pandemic decade is unlikely, meaning every additional trillion borrowed now costs more to service than it once would have.
Who ultimately carries the bill
Higher public debt does not stay confined to finance ministries. Governments servicing larger debt loads at higher rates typically face a choice between raising taxes, trimming public spending, or both, while businesses and households compete with the state for the same pool of savings, which can keep borrowing costs elevated for a mortgage or a small business loan long after a central bank stops raising rates.
Why It Matters
Debt itself is not new, but the combination of record levels, higher-for-longer interest rates and rising geopolitical spending marks a shift from the conditions of the 2010s. Whether today’s borrowing simply reflects a world investing in its future or one storing up fiscal strain will not be settled by a single data release, but the scale of the number now in circulation ensures it will shape budget decisions, credit ratings and household borrowing costs well beyond 2026.
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