France Is Dragging the Eurozone Toward a Debt Crisis

France at the Edge: A Debt Trajectory That Should Alarm Europe

France's public debt-to-GDP ratio is climbing toward the level Greece recorded on the eve of its sovereign-debt crisis. That single comparison, drawn from Desmond Lachman's analysis for Project Syndicate, deserves to be read twice. Greece in 2009 was the trigger for the most severe existential test the euro has faced. France today is not Greece in size, structure, or institutional standing. It is something arguably more dangerous: a core economy with peripheral finances, drifting toward a threshold that markets have historically treated as a point of no return.

The arithmetic behind that drift is unforgiving. France has run primary deficits—borrowing that excludes interest payments—for decades, and the stock of outstanding debt keeps compounding even when headline deficits narrow. The IMF's Fiscal Monitor has repeatedly flagged France among advanced economies whose debt ratios are projected to keep rising over the medium term absent policy change, a status shared by few peers of comparable credit standing. The European Commission's fiscal sustainability assessments have similarly placed France in a category where medium-term risks are rated high, driven less by any single year's shortfall than by the absence of a credible consolidation path.

Context matters here. Global sovereign borrowing costs have risen sharply since 2022, as major central banks unwound ultra-loose monetary policy and term premia reasserted themselves across the curve. Every basis point of higher yield translates into real money for a government rolling over debt at a ratio near or above 110% of GDP. France, which spent much of the 2010s borrowing at negative real rates, now faces a refinancing environment in which the interest bill is one of the fastest-growing line items in the budget. That is the mechanics of a debt trap: not a sudden stop, but a slow squeeze.

Political Paralysis: Why Paris Cannot Course-Correct

Consider what has to happen for France to stabilize its debt ratio: either primary surpluses large enough to offset the snowball effect of interest costs, or nominal growth persistently above the average interest rate on the debt. France has neither. The political system, fragmented across a weakened center, an insurgent far right, and a restive left, has demonstrated a repeated inability to pass budgets that meaningfully reduce the deficit. Successive governments have resorted to constitutional mechanisms to push spending plans through without a full parliamentary vote—a procedural workaround that solves nothing and inflames everything.

This is where the French case diverges from the Greek one in a way that should concern Brussels more, not less. Greece in 2010 was a small economy that could be ring-fenced, however painfully, with a troika program and a firewall. France is the eurozone's second-largest economy, a permanent member of the UN Security Council, and a co-architect of the single currency itself. There is no external authority with the standing to impose conditionality on Paris, and no French government that could survive accepting it. The adjustment must be domestically generated, and the domestic machinery for generating it is jammed.

Economists have long understood this bind. Olivier Blanchard's work on debt sustainability emphasizes that what matters is not the level of debt alone but the gap between the interest rate and the growth rate, and the political capacity to run primary surpluses when that gap turns adverse. On both counts, France is exposed. The growth-interest differential has turned against it as borrowing costs normalize, and the political capacity to respond is precisely what is missing. Nouriel Roubini has warned for years that eurozone fiscal vulnerabilities would resurface once the era of cheap money ended. That era is over.

Rising Borrowing Costs and the Sovereign Debt Spiral

Start with a simple transmission channel. When a government's debt ratio is high and its deficit is wide, lenders demand a higher term premium to hold its bonds. That higher yield raises the interest bill, which widens the deficit, which pushes the ratio higher still. The loop is self-reinforcing in the absence of a credible brake. France's spread over German bunds—the eurozone's risk-free benchmark—has periodically widened in recent years, a signal that markets are no longer pricing French debt as a near-substitute for German paper.

The global backdrop amplifies the problem. Since 2022, sovereign yields have risen across the United States, the United Kingdom, and the eurozone as inflation forced central banks to abandon yield suppression. The ECB has ended net asset purchases under its quantitative easing programs and has been shrinking its balance sheet. For years, the ECB's purchases absorbed a large share of eurozone sovereign issuance, compressing yields and insulating governments from market discipline. That cushion is being withdrawn. France, as one of the largest issuers in the euro area, is among the most exposed to the change.

There is also a maturity dynamic that gets less attention than it deserves. Much of France's outstanding debt was issued when rates were low or negative. As those bonds mature and are refinanced at today's higher yields, the average effective interest rate on the debt rises mechanically, year after year, regardless of what the government does on the spending side. The IMF has estimated that this "interest-rate-growth" dynamic can add meaningfully to debt ratios in advanced economies over the next several years. France sits squarely in that cohort.

Contagion Risk: What a French Debt Shock Means for the Eurozone

Suppose French spreads widen sharply. The first casualty is not France. It is the eurozone's financial architecture. French banks hold large portfolios of French government debt, and French debt is embedded in collateral frameworks, benchmark indices, and cross-border bank exposures across the currency union. A sustained repricing of French sovereign risk would transmit directly into the balance sheets of lenders in Germany, the Netherlands, and beyond, and into the wider European financial system.

The ECB's Transmission Protection Instrument, designed to counter unwarranted fragmentation, was built with smaller economies in mind. Whether it could credibly backstop a market as large as France's without triggering a political crisis over conditionality is an open question. The eurozone debt crisis of 2010–2012 was ultimately contained because the ECB pledged to do "whatever it takes" and because the affected economies were small enough to be rescued. Neither condition holds as cleanly for France. The institution would face pressure to act, and the politics of acting would be far more fraught.

The contagion channel runs through confidence as much as through balance sheets. The euro's credibility rests on the premise that its core members are fiscally sound. If the second-largest member is perceived as a credit risk, that premise erodes, and with it the willingness of global investors to hold euro-denominated assets at prevailing yields. Italy, with an even higher debt ratio, would face immediate spillover pressure. The eurozone debt crisis would not be a Greek problem this time. It would be a French one, and that is a different order of difficulty.

Global Spillovers: Why the World Cannot Afford to Ignore Paris

France is not a closed economy, and its debt is not a domestic matter. French sovereign bonds are a core holding in global reserve portfolios, pension funds, and insurance balance sheets. A repricing of French risk would ripple into global bond markets already stretched by heavy issuance from the United States, Japan, and the United Kingdom. The world is absorbing record volumes of sovereign debt at a moment when central banks are no longer buyers. Adding a French risk premium to that mix tightens global financial conditions for everyone.

Trade and growth channels matter too. France is the eurozone's second-largest economy and a major trading partner for Germany, Spain, Italy, and beyond. A fiscal shock that forces austerity or depresses French demand would weigh on European growth, which in turn would weigh on global growth. The IMF has repeatedly warned that eurozone fragmentation risk is a downside risk to the world outlook. A French debt crisis would be the most consequential test of that warning in the currency's history.

There is also a monetary policy dimension. The ECB sets policy for the entire euro area, but its decisions are calibrated to aggregate conditions. A French fiscal crisis would create a conflict between the stance appropriate for a stressed core and the stance appropriate for the rest. That conflict was manageable when the stress was confined to the periphery. It becomes far harder to manage when the stressed economy is large enough to move the aggregate itself.

What Would a Credible Fiscal Adjustment Even Look Like?

Begin with the scale. Stabilizing a debt ratio near or above 110% of GDP with an interest-growth gap working against you requires primary surpluses on the order of 1% to 2% of GDP for an extended period, according to standard debt-sustainability arithmetic of the kind Blanchard and others have popularized. France currently runs primary deficits. Closing that gap means finding several percentage points of GDP in consolidation—through spending restraint, revenue increases, or both—and sustaining it for years, not quarters.

The composition matters as much as the size. France's public spending is among the highest in the OECD as a share of GDP, which means consolidation cannot avoid touching pensions, health care, and public employment. Those are precisely the areas where French politics has repeatedly proved immovable. A credible plan would need to be phased, legislated, and credibly enforced across electoral cycles. No French government in recent memory has managed that on this scale.

There is no painless version of this. Growth-enhancing reforms can help lift the denominator, but they work slowly and cannot be assumed. Inflation erodes real debt but at a cost the ECB will not tolerate indefinitely. Financial repression is not available in a currency union with free capital movement. The only durable path runs through the tedious, unpopular work of primary surpluses and structural reform—the same path Greece was forced down, and the same path France has spent a decade avoiding. The eurozone debt crisis of the next decade will be written in whether Paris finally takes it.

Source: Project Syndicate