France's €3.5 Trillion Snowball: Debt Crisis

France's €3.5 Trillion Snowball: Debt Politics Ahead of 2027

France's public debt has hit €3.5 trillion — 117.5% of GDP — and interest costs alone are on track to become the state's biggest budget line by 2029, just as a fractured parliament heads into a presidential election.

France's public debt is no longer a slow-moving problem — it is on the cusp of a self-reinforcing "snowball" — interest costs outrunning growth — arriving precisely when the political system is least equipped to stop it. Reuters reported on July 7, 2026 that debt topped €3.5 trillion in the first quarter, 117.5% of GDP, and that the annual interest bill — €66 billion in 2025 — is on track to reach €100 billion by 2029, according to the Cour des Comptes. The load-bearing point: with the National Assembly unable to deliver a primary surplus and Marine Le Pen's National Rally leading polls for a May 2027 vote, the market is pricing not a fiscal problem but a political one. Paris, not Rome, now pays the higher premium.

The arithmetic has already tipped

The mechanics are unforgiving. When the average interest rate on outstanding debt exceeds nominal GDP growth, debt-to-GDP rises automatically unless the primary balance (the deficit before interest) is in surplus. France runs neither. The OFCE's June 2026 outlook has GDP growth at 0.7% in 2026 and the deficit stuck near 5% of GDP, keeping debt on an upward track from 113.2% in 2024 to 117.6% by end-2026, per a Sciences Po OFCE paper. The IMF's most recent Article IV baseline is more alarming still: without fresh measures, gross debt drifts to 121.5% of GDP by 2029, and the debt-stabilising primary surplus is not reached under the government's own plan until that year, according to the IMF's 2025 France staff report.

The primary document driving Brussels' patience and its threats is the EU Council Recommendation of 21 January 2025, which endorsed Paris's medium-term fiscal-structural plan and placed France under the reactivated Excessive Deficit Procedure. That document quietly builds in the snowball: it projects debt rising from 112.9% in 2024 to 116.5% in 2027 before any decline, and only if the government sticks to average net-expenditure growth of 1.1% a year through 2031. It has not.

Why 2026 fiscal politics broke

The 2026 budget was promulgated on February 19, 2026 under Article 49.3, after the government abandoned pension indexation cuts and higher medical franchises to buy Socialist non-aggression. The OFCE calculates the structural effort was cut roughly in half, from 0.8 to 0.5 points of GDP, and the deficit target loosened from 4.7% to 5.0%, per its Budget 2026: Un déficit de compromis analysis. The cost of that compromise: the same structural adjustment will now have to be pulled forward — roughly €40 billion of primary effort in 2027 — to keep the EU trajectory alive.

That is the bill Finance Minister Roland Lescure now has to draft. Speaking to lawmakers at the Aix-en-Provence Economic Forum, Lescure said he would push a 2027 finance bill tightening public finances further and aiming for a sub-5% deficit, Investing.com reported. Prime Minister Sébastien Lecornu, the fifth PM in less than two years, has to move a budget through a chamber where the National Rally and the left-wing NFP can jointly veto him at any moment. As the BBC put it, debt servicing now consumes more state resources than every department bar education and defence, and will overtake both by decade's end.

The market has already priced the politics

The most under-appreciated fact in French markets today is not the yield level; it is the ranking. The OAT–Bund 10-year spread has widened past the Italy–Bund spread. France now borrows at a higher premium over Germany than Italy does, a role reversal that would have been unthinkable in 2022. The Italian foreign-affairs institute IAI notes the OAT-Bund spread "has reached levels comparable to those of Italian government bonds," French yields remain contained in absolute terms only because of implicit ECB backstops, per its Last Tango in Paris briefing. AEI's Desmond Lachman puts the spread above 80 basis points — "its highest level since the 2010 Eurozone debt crisis" — in his Perfect French Debt Storm note.

Underneath the level, a subtler shift is showing up in academic pricing work. A Sciences Po study documents that since mid-2024, five-year OATs have traded at yields exceeding their credit-risk-equivalent swap-plus-CDS synthetic — a negative convenience yield that in effect strips French debt of its historic "core euro" liquidity premium, as shown in the Sciences Po working paper on negative convenience yields. Translation: investors no longer pay France for safety. They demand a discount for issuance risk.

Rating agencies have moved with them. Moody's cut France to Aa3 in December 2024. Fitch cut it to AA– in September 2025. S&P has France on negative outlook at the same level. Moody's senior VP Sarah Carlson told Aix-en-Provence that among Europe's five biggest borrowers, "the increase in interest payments relative to public debt will be greatest for France." That is the definition of a snowball warning.

The 2027 field is fiscally regressive — on both flanks

Here is the second-order shock most wire coverage misses. The candidates leading the polls are not offering less spending; they are offering more.

Marine Le Pen's National Rally — subject to a July 7, 2026 appeals-court ruling on her 2025 conviction for misuse of €2.9 million in European Parliament funds, per Al Jazeera — has campaigned on company tax cuts and reversing the 2023 pension reform. Jean-Luc Mélenchon's NFP has floated €150–180 billion in additional spending. Even the centrist frontrunners — Édouard Philippe and Gabriel Attal — have accepted the Lecornu government's October 2025 suspension of the pension reform, at a cost the outgoing finance minister put at hundreds of millions in 2026 and billions in 2027, according to a BBC readout of Lescure's warnings. Only Bruno Retailleau's Republicans and, tentatively, Philippe are running explicitly on deficit reduction.

That leaves the Banque de France as the last institutional voice for discipline — and Emmanuel Macron has quietly moved to protect it. Governor François Villeroy de Galhau announced he would step down in June 2026, a year ahead of schedule, allowing Macron to appoint a six-year successor before the presidential vote, The Economist reported. Macron has also named Amélie de Montchalin to run the Cour des Comptes and Fabien Mandon as armed-forces chief. The pattern reads clearly: the president is fortifying independent institutions against a populist successor. Markets have noticed.

The historical parallel worth flagging

The convenient comparison is Italy in 2011. The more honest one is France itself in 1992–1993, when the franc came under attack inside the ERM and yields blew out on political — not fiscal — grounds. Today's constraint is different in kind. Inside the euro, France cannot devalue, cannot cut rates unilaterally, and cannot count on the ECB's Transmission Protection Instrument unless it stays inside the EU fiscal framework. AEI's Lachman warns bluntly that France's debt is "over seven times as large as that of Greece" in 2010 — a French crisis would not be contained. That is not a forecast. It is a description of the collateral profile of the eurozone's second-largest issuer.

For now, the ECB's implicit backstop and the €18% household savings rate keep OAT auctions covered. Domestic banks and insurers have absorbed the marginal issuance that non-residents have not. But the Banque de France's own research warns that a sustained 5-percentage-point drop in non-resident holdings would push yields roughly 40 basis points higher, according to a Banque de France working paper. Multiply that by France's ~€300 billion annual gross issuance and the cost compounds fast.

What to watch

The next six months are the ones that will decide whether the snowball starts rolling or is caught on the mountain.

• October 2026 — Lecornu's government must table a 2027 finance bill by mid-October. Article 49.3 usage, and any repeat of the pension-reform concession, will be read directly into the OAT–Bund spread.
• Late 2026 — Cour de Cassation timing on Le Pen's appeal (roughly six months from July 7). A definitive bar removes the polling frontrunner and reshuffles the race toward Jordan Bardella.
• March 2027 — Municipal elections, a live-fire test of RN and Socialist strength before the presidential first round.
• April 18 and May 2, 2027 — Presidential first and second rounds. Any programme costed above the EU expenditure path will meet a spread response the day after.

Diplomat View

The France story is being mis-framed. This is not a slow-motion Italy — Italy has run primary surpluses for two decades. It is closer to a slow-motion United Kingdom circa 2022, but without the escape hatch of an independent currency or central bank. Our call: the OAT–Bund spread stays wider than Italy's through the 2027 vote, and France is downgraded at least one further notch by two of the three major agencies before the runoff — unless Lecornu passes a 2027 budget with a credible €30 billion-plus primary effort and the Court of Appeal removes Le Pen from the ballot, collapsing the fiscal-populist bid. If both happen, the spread compresses 25–40 basis points and the ECB's implicit backstop holds. If neither happens — the more likely path — the snowball turns from metaphor to market event, probably in the six-week window between the first round and the runoff, when a Le Pen or Bardella lead forces investors to price a programme they cannot underwrite. The forecast is falsifiable: watch the 2027 primary-effort figure in Lescure's October bill, and the July 7 appeals ruling. Everything else is noise.

The Bottom Line

France's debt problem is arithmetically manageable but politically insolvent: the parliament that must vote the primary surplus is the same parliament that toppled two prime ministers over asking for one. With interest costs on track to exceed education and defence spending by 2029, the 2027 election is not a referendum on Macronism. It is the last window to stop the snowball before it moves the whole eurozone.