France dedicates more than 75 billion euros each year to servicing its debt alone—more than the combined budget for higher education and research. Public debt reaches 115.7% of GDP at the end of 2025, while the OECD projected actual growth of 0.9% in 2026, compared with 1.8% for the median of its members. Interest charges reduce budgetary margins and have increased sharply, though it is not established whether they absorb the bulk of those margins. Economists diverge on the response: should spending be cut first or should growth be stimulated first?
The essentials
- The debt service charge for all public administrations was 64.7 billion euros in national accounting in 2025 according to INSEE/FIPECO; in the state’s budgetary accounting alone, the minister of economy confirmed 52 billion euros for 2025 and 64 billion euros projected for 2026 — figures in national accounting, all public administrations combined, reach approximately 74 to 78 billion euros depending on sources, and heading toward 80.
- Stabilization of the debt-to-GDP ratio depends on the gap between apparent nominal interest rates and nominal growth, the primary balance, and stock-flow adjustments (INSEE, OFCE).
- Public investment has advanced recently in real terms; investment by public administrations rose 8.7% in volume in 2023 then 6.5% in 2024 according to revised data (INSEE).
- The Canadian case of 1994 and the Italian case post-2011 offer two opposite trajectories from a comparable starting point, and their conditional lessons merit examination.
- Reform of the structure of spending or targeted investment in certain sectors appears necessary to prevent lasting budgetary tensions.
75 billion: what this figure really means
To understand the real weight of this figure, a comparison suffices. The Ministry of Education budget amounts to approximately 60 billion euros. That for higher education and research slightly exceeds 30 billion. French debt interest, meanwhile, now reaches approximately 75 billion euros in national accounting across all administrations — and this sum repays not a cent of principal. It pays only the cost of time, the rent on borrowed money. For the first time in recent budget history, interest charges became the leading item of spending, ahead of Defense.
Debt service is not new, but it changes in nature when rates rise. Between 2020 and 2022, negative rates made French debt quasi-free at the margin. Since 2022, new issues are made at substantially higher rates, and the interest charge increases as old debt, contracted at low cost, matures and must be refinanced. The progression is sharp: 58 billion in 2024, approximately 67 billion in 2025, 74 to 78 billion depending on scope in 2026. According to Rexecode, this movement is not finished: the charge could reach approximately 120 billion euros by 2030.
Interest charges could continue rising for several years before stabilizing, even if policy rates fall slightly. The Economy Ministry itself anticipates that the annual charge could approach 100 billion euros by 2029 if rates remain durably elevated.
The figure that makes this situation particularly constraining is the differential between the apparent interest rate on debt and the rate of nominal economic growth. When the interest rate exceeds the growth rate—what economists call the snowball effect—the debt-to-GDP ratio spirals upward spontaneously, even without new primary deficits. France faces a rise in refinancing costs. In 2025, nominal French GDP growth was 1.9%. The effective interest rate on the outstanding debt, not just long-term rates, must be compared to this nominal growth.
Long-term borrowing rates, meanwhile, oscillate between 3.5 and 4.5%. A durable gap between the apparent rate on outstanding debt and nominal growth can increase debt, depending on the primary balance and stock-flow adjustments.
Investment frozen, growth compressed
Public administrations’ investment rose 8.7% in volume in 2023 then 6.5% in 2024 according to revised data. This sentence deserves to be read slowly. It means that public investment in real terms has increased recently, while needs in digital infrastructure, energy transition, and vocational training have risen sharply. The available accounts show no established decline in public investment’s share of GDP.
This choice is not trivial. OFCE documents the mechanism: certain sectors—training, energy, transport infrastructure—are identified as generators of medium-term growth. Investment in vocational training is associated with growth effects exceeding some routine social transfers. Yet public investment spending has increased recently, while operating expenses and social charges have continued to rise.
The OECD then projected 0.9% effective GDP growth for France in 2026, which illuminates medium-term projections. This estimate is lower than that for other advanced economies, including the United States. Nominal growth observed directly enters the debt-to-GDP dynamic; potential growth illuminates medium-term projections. When it declines, the same debt becomes heavier to bear, even if its nominal amount does not increase.
The weakness of public investment in research amplifies this decline: as data on R&D effort shows, France watches the world accelerate without structurally correcting its positioning in high-value-added sectors.
The Stiglitz thesis: a self-imposed fiscal constraint
Economist Joseph Stiglitz, at the European Tax Symposium in March 2026, formulated what he calls a fiscal trap: states that refuse to tax the largest fortunes sufficiently deprive themselves of the revenue needed to invest, which compresses growth, which makes debt heavier, which reinforces pressure on public spending. The loop sustains itself.
Applied to France, the argument has real coherence. Public investment has not experienced continuous freeze since 2017, but it declined in 2020 and rose between 2023 and 2025. This choice results partly from political constraint: increasing levies on capital or large fortunes encounters strong resistance, amplified by capital’s international mobility. The rise in debt charges—which jumped 16 billion euros in two years, from 58 billion in 2024 to approximately 74-75 billion in 2026—reduces budgetary margins without its share of revenues rising continuously. The governor of the Banque de France said it bluntly: this increase “risks eliminating all room for maneuver” to finance other public priorities.
The data partly confirm this: France is not a fiscally under-armed state; its mandatory levy rate is among the highest in the OECD. The problem is therefore less the overall level of taxation than its structure and the allocation of spending it finances. A large part of tax revenues serves to finance operating expenses and transfers whose economic multiplier is weak. Stiglitz points to a real reality, the constraint on investment, but his prescription (increased capital taxation) encounters an obstacle that French data make visible: The rate depends on the definition retained: 42.8% in INSEE national accounts for 2024, 43.5% according to OECD, and 45.3% in the Eurostat series including imputed contributions; the space to levy more taxes without affecting activity is limited.
The lessons of Italy and Canada
France is not the first advanced economy to find itself in this configuration. Two comparisons illuminate possible trajectories, provided they are not used as prophecies.
Italy crossed the 120% debt-to-GDP threshold in 2011, after the eurozone crisis. Since then, the country has never left it. Its potential growth has remained around 0.5% annually, lower than France’s. Its public investments declined. The interest charge has oscillated between 3.5 and 4% of GDP, a level that permanently absorbs budgetary margins.
The result: an administered stagnation, socially costly, without open crisis but without exit. Spreads between Italian and German rates have regularly reflected market doubts about sustainability, without ever triggering rupture, in part thanks to ECB support.
Canada in 1994 is the most often cited counter-example. Canadian federal debt hovered around 68% of GDP, lower in proportion, but perceived as unsustainable by markets, to the point that the Wall Street Journal described the country as an “honorary third-world country.” The Chrétien government programmed a reduction of approximately 19% of certain program spending between 1994-1995 and 1997-1998, accompanied by clarification of power-sharing between federal government and provinces. But the Canadian recovery resulted from several factors: budgetary consolidation, monetary conditions, restructurings, and American demand. Their respective contributions cannot be ranked.
Exporting the Canadian recipe to France, with anemic European growth, assumes conditions that do not exist.
French industry, which now contributes less to GDP than Greek industry, structurally weighs on the country’s export capacity, and thus on growth driven by external demand.
According to some economists, the structure of French public spending presents an important resource allocation challenge. A public spending level at 57% of GDP remains compatible with investment if allocation is well calibrated. In France, rigid spending—pensions, payroll, and interest—absorbs a significant portion of available budgetary space, and public investment spending has increased recently. This analysis leads to recommending a reorientation of existing spending rather than a further increase in levies.
Three trajectories for the next fifteen years
One possible scenario in the short term is that of administered stagnation. Debt would remain at a high level. Growth would be moderate. Balance would be maintained by successive adjustments rather than by structural reforms. Social space compresses slowly: public services degrade through under-investment, without visible rupture.
This scenario is politically stable in the short term; no actor has interest in triggering a crisis, but it produces an accumulation of fragilities. According to some analyses, France faces major investment needs in energy transition, aging, and digital.
The second scenario is that of accelerated structural reform. It assumes a reorientation of public spending: reduction of operating expenses and transfers with weak multipliers, targeted increase in investments in training and energy. This is the most favorable scenario long-term. It is also the most improbable politically in the short term. France has not undertaken budgetary reform of this scope since the 1980s.
The political coalitions opposing it are stable and powerful.
The third scenario is that of a confidence crisis. A rise in long-term rates could increase the debt-to-GDP ratio. The rate spread between French government bonds and German ones—the OAT-Bund spread—is the signal to watch. It already crossed 80 basis points during political turbulence in 2024. A durable widening of the spread would have significant effects on refinancing costs—all the more so because France’s Treasury Agency must raise more than 530 billion euros in 2026, including approximately 320 billion at medium and long term, a record level.
This scenario would trigger through silent accumulation of doubts about the long-term trajectory, not by deliberate decision.
The avenues that would prevent the third scenario without waiting for the second are known. First, selectivity of budget cuts: favoring operating expenses over investment spending, the reverse of what has been practiced since 2017. Next, use of European budgetary space: European recovery funds can finance transformative investments without burdening national debt if their absorption is effective, which remains a real execution challenge. Finally, a review of fiscal spending governance, the niches and exemptions that cost tens of billions each year without systematic evaluation of their effectiveness.
The weakness of French research and development, documented by patent filing and publication data, illustrates the real cost of this decade of constrained investment: it is future potential growth that erodes, not merely the present.
The spread and the growth revision in 2027
Two indicators will make it possible to know, by 2027, in which scenario France is genuinely engaged. The first is the evolution of the OAT-Bund spread. A widening of the spread would be a warning signal for the confidence crisis scenario.
The second is INSEE’s revision of potential growth in 2027. If this revision confirms an upturn linked to artificial intelligence’s effects on productivity, the sustainability equation improves. If it revises downward, the trajectory of administered stagnation risks self-reinforcing.
France possesses real assets: high household savings, a solid banking system, an industrial base which, despite its relative decline, retains strong positions in aeronautics, luxury, and nuclear energy. These assets are not sufficient to mechanically escape the debt trap, but they give time, and time, well used, is a resource that stagnating economies often waste without seeing it.
Sources
- OFCE, French Public Debt 2026: https://www.ofce.sciences-po.fr/blog/dette-publique-francaise-2026/
- Joseph Stiglitz, EU Tax Symposium 2026, remarks on oligarchization and taxation: https://www.eunews.it/en/2026/03/17/stiglitz-at-the-tax-symposium-the-us-is-no-longer-a-democracy-yes-to-a-wealth-tax/
- FIPECO (François Ecalle), Analyses on French debt and public finances: https://www.fipeco.fr
- INSEE, French public debt and potential growth data 2025
- Banque de France, Annual report and macroeconomic projections 2025-2026
- OECD, Economic Outlook 2026 (comparative potential growth)
- Rexecode, Refinancing shock: French public debt changes regime, July 2026: https://www.rexecode.fr/conjoncture-previsions/notes-d-analyse/points-d-actualite/pa-france/choc-du-refinancement-la-dette-publique-francaise-change-de-regime
