Budget deficit and public debt: what the “3%” rule is — and why it keeps coming back

The number that returns with every budget

Every year, when the budget hits TV and feeds, the same totem comes back: “we’re above 3%.” For many people it has become a moral verdict (serious / reckless) or an abstract threat (“Brussels”). In practice it is mainly a reference threshold in EU fiscal rules — useful for comparison, not enough to explain everything.

This piece does not settle “too much spending / too much tax.” It separates deficit from debt, explains why we talk in % of GDP, where the 3% comes from, what an excessive deficit procedure does, and where France sits in 2026 — with official figures, and the usual filter: a budget-law target is not yet a final statistical outturn.

Deficit ≠ debt (and that is not a quibble)

Two different objects, often glued into one sentence:

• The public deficit (negative balance): in a given year, general government (central state, social security, local government…) spends more than it takes in. It is an annual flow. Measured in euros, then as % of GDP.
• Public debt: the stock of borrowing still owed (Maastricht sense: consolidated gross debt). It is a stock. It mostly rises when deficits pile up, but also depends on GDP growth, interest rates, and some financial operations.

Imperfect but useful analogy: the deficit is this year’s overdraft; debt is the credit still outstanding. You can shrink the annual overdraft without immediately crashing the credit balance — especially if the stock is already large.

Another common mix-up: the central-state budget deficit is not exactly the Maastricht public deficit (which aggregates state + social security + local government). Headlines sometimes blur them. When people say “the 3%,” they usually mean the general government balance as a share of GDP.

Why % of GDP?

A €150 billion deficit “on its own” says almost nothing: huge for a small country, manageable for a large economy. GDP (output in a year) is the yardstick. Saying “5% of GDP” means: the annual gap between revenue and spending is about one-twentieth of the country’s economic activity.

Same logic for debt: 115% of GDP means the public borrowing stock is a bit more than one year of production — not that “every resident owes 115% of their salary,” and not that it must all be repaid tomorrow. It is a sustainability and comparison ratio, not a personal invoice.

Two useful nuances:

1. The debt/GDP ratio can fall even if debt in euros rises, if nominal GDP grows faster.
2. Conversely, a deficit that “holds steady” in GDP points can still inflate the debt if you stay above a path compatible with growth and rates for long enough.

Where the “3%” (and the “60%”) come from

In the Maastricht Treaty (1990s) and then the Stability and Growth Pact, the European Union set reference values for member states’ public finances:

• public deficit should not exceed 3% of GDP (except in circumstances the texts allow);
• public debt should not exceed 60% of GDP, or should be falling sufficiently if it is above that.

These thresholds are club rules for a monetary union: limit fiscal slippage in one country that could weigh on confidence in the euro and on others. They are not a magic law of economics. Some economists find them too rigid; others see a necessary political guardrail. The reader’s point: the 3% is first an institutional criterion, not proof that below it “everything is fine” and above it “everything collapses.”

The framework has evolved (pact reforms, temporary suspension during Covid, a new EU economic governance framework in force from 2024). The spirit remains: multi-year paths, Commission and Council surveillance, and the option to open a procedure when a country drifts lastingly from the references.

Excessive deficit procedure: what it means (and what it does not)

When a state lastingly breaches the references — or drifts too far — the EU can open an excessive deficit procedure. In simplified form:

1. the Commission assesses and may propose opening the procedure;
2. the Council decides;
3. the country receives recommendations (correction timetable, fiscal effort);
4. in theory sanctions exist (especially in the euro area) — in practice they are rare and highly political.

This is not a bailiff seizing the French Treasury overnight. It is a process of institutional pressure: reports, deadlines, talks with Brussels, reputational risk on markets, and constraints on the path shown in budget documents. For a government, staying “in procedure” mainly means every budget must be justified inside a European frame — not only before the national parliament.

Where France stands (2025–2026 ballpark)

According to Insee, the 2025 public deficit stands at 5.1% of GDP (after 5.8% in 2024). Clearly above the 3% reference.

On the 2026 initial budget law (LFI), budget.gouv presents a public-deficit target around 5.0% of GDP — lower than the 2025 objective, still far from 3%. Trajectory documents (draft budget / medium-term fiscal-structural plan) aim to return under 3% by 2029. Read that as a government commitment and an horizon aligned with EU recommendations — not as an automatic machine. A path can slip if growth, rates, or political choices change.

On debt, Insee puts the Maastricht ratio at 115.6% of GDP at end-2025, then around 117.5% at end-Q1 2026. The ~115–118% range you hear in 2026 debates fits recent releases — remembering the ratio moves each quarter and with GDP revisions. That is not “France goes bankrupt tomorrow”; it is also not cosmetic: a large stock + higher rates than before 2022 costs money.

Why interest payments squeeze (even without a “crisis”)

When debt is heavy and interest rates rise, the debt service (interest paid to creditors) eats a growing share of the budget. This is not abstract: every billion in interest is a billion not available for something else — hospitals, schools, transition, tax cuts, whatever your priority.

Three simple mechanisms:

1. Stock effect — the higher the debt, the more a given rate costs.
2. Rate effect — refinancing older bonds at higher rates gradually lifts the bill.
3. Credibility effect — if investors doubt the path, they ask for a premium; borrowing costs can rise before any spectacular “crisis.”

So the “3%” also returns for a very earthy reason: staying far above the threshold for years, with debt already high, makes correction longer and room for manoeuvre tighter — whatever the political colour in office.

What the “3%” is / is not

How to read the next budget fight

1. Ask whether the figure is the deficit or the debt.
2. Check billions vs % of GDP — and which year.
3. Separate target (LFI, draft budget) from outturn (Insee, Eurostat notification).
4. Link the 3% to the EU frame: reference + possible procedure, not a free-floating slogan.
5. Ask about interest: even if you dislike Brussels rules, the cost of the stock is real.

The “3%” bites because it compresses concrete choices into one number: what to fund, what to tax, what to borrow, how fast to close the gap. Understanding the mechanism does not require loving the rule. It only keeps you from confusing a European threshold with either an apocalypse — or a detail that does not matter.

Going further

• budget.gouv — LFI 2026 — official deficit target and path.
• budget.gouv — draft budget 2026 — consolidation plan presentation.
• Insee — 2025 deficit and debt — national statistical outturn.
• Insee — Q1 2026 debt — quarterly Maastricht ratio.
• EU Council — excessive deficit procedure — institutional frame.
• European Commission — economic governance — rules and surveillance.