Major advanced economies within the Group of Seven are confronting mounting strain on public finances as debt burdens remain elevated while spending demands grow. Policymakers face a constellation of pressures - from population ageing to climate and defence commitments - that are already stretching budgets, and the recent Iran war has reintroduced inflationary risks that make servicing those liabilities more challenging.
Markets reacted sharply in March, with borrowing costs in Europe experiencing their largest monthly jump in years. Countries that depend heavily on imported energy have felt this most acutely as surging oil and gas prices add to fiscal strain. Higher borrowing costs, if sustained, can curtail government capacity to maintain public services and investments by increasing the share of revenue earmarked for interest payments; in extreme cases, a government can face serious difficulty in meeting its debt obligations.
A live dashboard monitors a range of sovereign debt measures across the G7 to gauge how these pressures are evolving and where vulnerabilities are concentrated.
Borrowing costs and yields
Government bond yields across the G7 climbed considerably after the COVID-19 pandemic and following Russia's invasion of Ukraine, as central banks raised policy rates aggressively to rein in higher inflation. Beyond monetary policy, longer-term borrowing costs have risen because investors demand greater compensation for the risks associated with holding longer-dated sovereign debt. The recent Iran war is the latest shock to add volatility to this backdrop.
Among peers, Britain has seen particularly pronounced moves: its 10-year government yield reached levels in March not seen since 2008, and it currently faces the highest borrowing costs within the group.
Shift toward shorter maturities - and the trade-offs
Yields on shorter- versus longer-dated bonds have widened, making long-term borrowing relatively more expensive. This gap has been magnified by a mix of factors, including fiscal concerns, central bank reductions in bond holdings, and lower purchases of long-term sovereign debt by traditional buyers such as insurers and pension funds. Those investors have reduced their activity in markets stretching from Japan to Britain.
As a response, many governments have increased issuance of shorter-term paper to limit exposure to high long-term rates. That approach reduces immediate interest expense risk tied to long maturities, but it carries its own hazard: bills and short-term bonds must be rolled or refinanced sooner. Any further increase in yields thus transmits quickly into higher interest outlays.
Debt-to-output and long-term drivers
With the exception of Germany, debt portfolios in the G7 are roughly equal to or exceed annual economic output. Past shocks - the 2008 global financial crisis, the 2011-12 euro area debt turmoil and the 2020 pandemic - all pushed debt ratios higher while weighing on growth and increasing public spending obligations.
Japan stands out with the largest debt-to-output ratio in the group, with liabilities exceeding twice the size of its economy. Even Germany, which historically emphasized fiscal prudence, has increased borrowing to support defence spending and public investment. Looking ahead, ageing populations, rising interest bills and expanded commitments on defence and climate policy are likely to push debt levels even higher absent substantive policy adjustments.
Interest payments and fiscal space
As governments refinance previously issued low-cost debt at market rates that are considerably higher, interest payments are rising as a share of GDP in most G7 countries. While these payments remain below some historical peaks for several nations, the upward trend is clear and notable, particularly in the United States. Among OECD members, aggregate interest payments already exceeded defence spending in 2024.
Term premium and investor compensation
The term premium - the additional yield investors demand for holding longer-term sovereign bonds - has increased since the pandemic, notably in U.S. Treasuries. That elevation reflects a range of investor concerns, including the outlook for U.S. fiscal policy, reductions in central bank bond holdings and questions about central bank independence, in addition to uncertainty over longer-run inflation. The rise in term premia is not confined to the United States; it is a global phenomenon, with measures across major OECD countries reaching their highest level in more than a decade according to recent assessments.
Shifts in sovereign risk within Europe
One debt measure that has improved for several countries is the risk premium investors charge on individual euro-zone sovereigns relative to Germany, regarded as the bloc's safest borrower. The euro area has moved away from the most acute stresses witnessed during the past debt crisis; Italy, once emblematic of those strains, has seen its spread narrow to the lowest level observed since 2008, helped by stronger European cohesion after the pandemic, increased political stability and a lower budget deficit.
By contrast, French sovereign bonds have been repriced to reflect higher perceived risk following a fractured political backdrop after a shock election in 2024 that has impeded efforts to reduce the budget deficit.
Japan under scrutiny
Japan, the most indebted advanced economy by the debt-to-output metric, remains under close market scrutiny after government spending proposals put forward by Prime Minister Sanae Takaichi raised fiscal concerns. Market stress in Japan's bond market began last May after a poorly received long-term bond sale: demand for a 20-year issuance fell to its weakest level since 2012 and another gauge of investor sentiment reached its second-worst mark since at least 1987. In reaction, Japanese authorities trimmed planned sales of longer-duration debt, which helped steady demand, although upward pressure on borrowing costs persists.
Overall, the G7 fiscal picture is shaped by a confluence of cyclical and structural forces. Geopolitical shocks can rapidly raise borrowing costs and inflation expectations, energy price swings amplify pressures for energy-importing nations, and demographic and policy-driven spending commitments point to a need for careful fiscal management if governments wish to avoid a further buildup in debt service burdens.