At the end of 2025, almost two-thirds of Belgium’s Maastricht public debt was held by non-residents. Official European government-finance data show 68.3554% of GDP in debt held by non-residents and 39.5020% by Belgian residents, against total Maastricht debt of 107.8574% of GDP.
The short answer
Because the official holder series use the same debt definition and the same GDP denominator, their shares of the total debt stock can be derived directly.
| Holder | Official series, % of GDP | Share of total Maastricht debt |
|---|---|---|
| Non-residents | 68.3554% | 63.4% |
| Belgian residents | 39.5020% | 36.6% |
| Total | 107.8574% | 100% |
The resulting 63.4% non-resident / 36.6% resident split is a Cameralius derivation: each official holder series is divided by the corresponding total Maastricht-debt series. It is not presented as an independently published Eurostat percentage.
The finding refers specifically to Belgium’s consolidated general-government Maastricht debt at face value at the end of 2025. It does not identify individual investors, named banks or funds, or the nationalities of ultimate beneficial owners.
What debt are we measuring?
This article uses the same debt universe as How much public debt did Belgium have at the end of 2025?
Eurostat defines Maastricht debt as the consolidated gross debt of the whole general-government sector outstanding at the end of the reference period, measured at nominal or face value.
For Belgium, general government includes the relevant units of central government, state government, local government and social-security funds. The debt measure covers liabilities in three principal instrument categories: currency and deposits, debt securities and loans.
Internal liabilities between units inside general government are removed through consolidation.
Eurostat’s first 2026 Excessive Deficit Procedure notification reported Belgium’s end-2025 Maastricht debt at €692.461 billion, equal to 107.9% of GDP. The holder statistics are therefore answering who held the financial claims represented by that defined debt stock — not who held every conceivable liability of the Belgian public sector.
What does “held” mean?
Debt exists on two sides of a balance sheet.
For the Belgian government, a government bond or loan is a liability. For whoever holds the corresponding financial claim, it is an asset.
The holder statistics classify the creditor side of that relationship according to the institutional sector and residence of the direct holder.
Eurostat’s debt-structure framework distinguishes resident financial corporations, resident non-financial sectors and non-residents, with more detailed institutional-sector classifications available within the statistical system.
This is a statistical classification of creditors. It is not a register of names.
What does “non-resident” mean?
In national accounts, non-residents belong to the rest of the world sector. The classification is based on economic residence rather than citizenship or nationality.
A non-resident holder can therefore be many different kinds of institution: for example, a foreign bank, investment fund, pension or insurance institution, central bank or another investor resident outside Belgium.
So the finding that roughly 63% of Belgian Maastricht debt was held by non-residents does not mean that foreign governments owned 63% of Belgium’s debt.
Who are the Belgian resident holders?
The remaining 36.6% of the end-2025 Maastricht debt was held inside the Belgian economy.
That resident side can include financial corporations and non-financial resident sectors. But saying simply that “Belgians owned 36.6% of Belgian debt” would be too loose.
A government security held directly by a Belgian bank or investment institution is statistically held by that financial corporation. A Belgian household may in turn own a pension, insurance or investment product whose portfolio contains government securities.
Direct statistical ownership and ultimate economic exposure are not necessarily the same thing.
Why can’t we simply list Belgium’s biggest creditors?
Because this dataset does not provide a ranked register of individual creditors.
It can establish that a claim belongs to a resident institutional sector or to the rest of the world. From that classification alone, it cannot establish which named investment fund owns the claim, which particular bank holds it, which foreign country ultimately owns it, or which household may have indirect exposure through an intermediary.
Turning these sector statistics into a list of Belgium’s largest named creditors would therefore create information that the source does not establish.
Why might another Belgian debt-holder chart show different numbers?
Because “Belgian public debt” is not a safe label unless its perimeter is specified.
The Belgian Debt Agency manages financing for the federal state. Investor information about Belgian government securities can therefore answer useful questions about holders of particular federal debt instruments.
But federal-state financing is not automatically the same universe as consolidated Belgian general-government Maastricht debt.
This article deliberately keeps the holder data inside the same general-government perimeter as our existing €692.461 billion debt article. Otherwise a federal investor distribution could be placed beside a general-government debt total and produce an apparently precise answer with mismatched boundaries.
See What counts as Belgian government? for why that distinction matters.
Is foreign ownership necessarily a problem?
The holder split does not answer that question by itself.
Who holds government debt can matter for financing conditions, market exposure, investor concentration and the transmission of financial shocks. But the fact that a creditor is resident or non-resident does not by itself establish whether Belgian debt is sustainable, whether refinancing is secure or whether fiscal policy is sound.
This Data Note establishes the ownership structure first. It does not turn that structure into a causal or normative judgment.
Ownership can change even when total debt does not
The holder distribution is also a stock measured at a particular date.
Government securities trade. Financial institutions rebalance portfolios. Loans can change counterparties. Central banks and other investors can buy or sell government debt.
The total debt stock could therefore remain broadly unchanged while its holder composition changes. Conversely, total debt could increase while the share held by non-residents falls.
That is why the title asks who held Belgium’s public debt at the end of 2025, rather than presenting the holder map as permanently current.
What this does not mean
- Foreign governments held 63.4% of Belgian debt.
- 36.6% was personally owned by Belgian households.
- The figures describe only federal-government bonds.
- All Belgian public-sector liabilities are included.
- Residence identifies the nationality of the ultimate investor.
- Direct statistical holders are always the ultimate beneficial owners.
- The end-2025 distribution is still the exact distribution today.
- A high non-resident share is, by itself, evidence that Belgian debt is unsafe.
Why the reference date matters
Eurostat’s structure-of-government-debt statistics are annual. The metadata for this collection were last updated on 3 June 2026, while the ECB holder series used for the numerical observation were updated on 24 April 2026.
The reference period here is fixed: 31 December 2025.
Later releases can revise historical values. If they do, Cameralius can update the article transparently while preserving the fact that the question concerns the end-2025 debt stock.
This is the difference between a reference period and a source vintage.
The Cameralius rule
“Who owns Belgium’s debt?” sounds like a simple question. Three boundaries have to be fixed before the answer becomes meaningful.
- Which debt? Consolidated general-government Maastricht debt.
- When? The stock outstanding at the end of 2025.
- What does ownership mean? The residence and institutional sector of the direct statistical holder of the financial claim.
With those boundaries in place, the answer is clear: about 63.4% of Belgium’s Maastricht debt was held by non-residents at the end of 2025, and about 36.6% by Belgian residents.
Everything more specific requires more specific evidence.
Related Cameralius research
- How much public debt did Belgium have at the end of 2025?
- How does Belgium’s budget deficit become public debt?
- What counts as Belgian government?
- Why two official Belgian government numbers can both be correct
Sources & evidence
- Eurostat — Structure of government debt (gov_10dd_sgd). Controlling methodological source. The collection is based on ESA 2010 Table 28A and provides annual Maastricht-debt structure data, including breakdowns by institutional sector of the holder. Metadata last updated 3 June 2026.
- ECB Data Portal — Government debt by holder. Numerical holder series. For Belgium in 2025: non-resident-held debt 68.3554% of GDP and resident-held debt 39.5020% of GDP. Series updated 24 April 2026.
- ECB Data Portal — Government debt. Corresponding total Maastricht-debt series: 107.8574% of GDP for Belgium in 2025, updated 24 April 2026.
- Eurostat — Provision of deficit and debt data for 2025, first notification, published 22 April 2026. Cross-check for Belgium’s end-2025 general-government debt stock of €692.461 billion and 107.9% of GDP.
Cameralius derivation: 2025 holder shares of total Maastricht debt are calculated by dividing each official holder series, expressed as a percentage of GDP, by the corresponding total-debt series. No cross-source denominator is introduced. The resulting shares are 63.3757% for non-residents and 36.6243% for residents, rounded in the article to 63.4% and 36.6%.
Reference period: 31 December 2025.
Holder-series vintage: 24 April 2026.
Eurostat structure metadata vintage: 3 June 2026.
Evidence review: 6 September 2026.
Later official releases may revise historical values. Any material revision should be reflected transparently in this article’s evidence state rather than silently replacing the original source vintage.
Editorial status
Country: Belgium
Publication type: Data Note — vintage-locked
Topic: Public debt / debt holders / institutional sectors
Debt perimeter: Consolidated general-government Maastricht debt
Reference period: End-2025
Evidence state: Official observations plus labelled Cameralius derivation
Last evidence review: 6 September 2026