Belgium
Banking sector profile — Europe
Data as of October 2026 • TGB Intelligence Unit
Policy rate as of 7 October 2026: 2.50% (ECB deposit facility rate; source: European Central Bank)
Banking sector at a glance
Structure and performance
Belgium's banking sector is highly concentrated: the five largest credit institutions held 74.4% of sector assets in 2025 on ECB data. KBC Group and BNP Paribas Fortis, the Belgian subsidiary of BNP Paribas, are of similar size at around US$460bn of assets each, and Belfius, owned by the Belgian State, and ING Belgium complete the group of large domestic lenders. Brussels also hosts financial-market-infrastructure banks such as Euroclear Bank and The Bank of New York Mellon SA/NV, whose balance sheets enlarge aggregate banking statistics but which the NBB excludes from its sector analysis.
The dominant model is deposit-funded retail banking, frequently combined with insurance. Deposits from households and non-financial corporations reached €716bn at end-2025, 57% of the sector's balance sheet, while loans to these sectors rose to €730bn. Market funding has grown as central bank term funding was repaid: debt securities issued increased from under €90bn in 2022 to €126bn, or 10% of liabilities. Savers are rate-sensitive; a one-year State note in September 2023 drew €22bn of deposits, which banks competed to recapture when it matured.
Profitability is solid but below its 2024 peak. Sector net profit was €8.4bn in 2025 (€9.0bn in 2024), a return on equity of 9.7%, with net interest income of €17.3bn and a cost-to-income ratio of 57.4%. Asset quality is strong, with an NPL ratio of 1.3% at end-2025, and the sector CET1 ratio stood at 15% with a total capital ratio of 19.2%. KBC reported first-half 2026 net profit of €1.71bn, and BNP Paribas Fortis a CET1 ratio of 14.0% at June 2026.
The NBB's 2026 Financial Stability Report describes an uncertain operating environment and a changing regulatory landscape, but a sector capable of absorbing shocks. Its concerns include a commercial real estate market that shows signs of recovery but retains pockets of risk, the growing role of non-bank financial counterparties in funding, and a government bond portfolio that rose to €115bn, or 9% of assets, in 2025. Risks in the residential property market have declined, allowing the NBB to fold its mortgage-specific capital buffer into a slightly higher countercyclical buffer.
Structural trends
The shifts shaping banking in Belgium.
Macroprudential simplification: the NBB raised the countercyclical buffer rate from 1% to 1.25% on 1 January 2026; after a six-month implementation period the higher rate applied from 1 July 2026, when the mortgage-specific buffer was abolished and total requirements fell from about €3.9bn to €3.3bn.
Rising market funding: banks' outstanding debt securities grew from under €90bn in 2022 to €126bn at end-2025, 10% of liabilities, replacing ECB targeted longer-term refinancing.
Central European expansion: KBC completed the €708m acquisition of 98.45% of Slovakia's 365.bank on 15 January 2026, ahead of a planned merger with its ČSOB subsidiary.
Normalising returns: sector return on equity fell to 9.7% in 2025 from 11.4% in 2024, although net interest income still rose to €17.3bn from €16.9bn.
Leading institutions
Largest banks in Belgium by total assets.
| # | Bank | Total assets (US$) | Type |
|---|---|---|---|
| 1 | KBC Group | US$466.9bn | Universal |
| 2 | BNP Paribas FortisSubsidiary of BNP Paribas | US$460.8bn | Universal |
| 3 | Belfius | US$226.6bn | State-owned |
| 4 | ING BelgiumSubsidiary of ING | US$189.4bn | Universal |
| 5 | Argenta | US$78.6bn | Savings |
| 6 | Crelan | US$67.1bn | Cooperative |
| 7 | BNY Mellon SA/NVSubsidiary of BNY | US$57.5bn | Commercial |
| 8 | BeobankSubsidiary of Crédit Mutuel Alliance Fédérale | US$14.9bn | Commercial |
Largest banks in Belgium by total assets, FY2025 audited accounts. Domestic groups as in the TGB Bank Rankings; subsidiaries of foreign groups shown with their own accounts and marked. Not a ranking table. Converted at official central-bank rates for each fiscal year-end.
Supervision and capital rules
Significant institutions, including KBC, Belfius and the Belgian subsidiaries of BNP Paribas and ING, are supervised directly by the ECB within the Single Supervisory Mechanism. The National Bank of Belgium supervises less significant institutions, conducts macroprudential policy and acts as national resolution authority, while the FSMA oversees conduct of business and investor protection. EU capital rules implementing the Basel III final reforms (CRR3) have applied since January 2025. The NBB's 1.25% countercyclical buffer has applied since 1 July 2026, replacing the former buffer for mortgage portfolios; in March 2026 the NBB announced that the rate would stay at 1.25%. Deposits are guaranteed up to €100,000 per depositor under the EU-harmonised scheme.
What changed in 2026
- January 2026: the NBB raised the countercyclical buffer rate to 1.25% on 1 January, effective from 1 July 2026, and KBC completed its acquisition of Slovakia's 365.bank on 15 January.
- May 2026: the NBB's Financial Stability Report put 2025 sector net profit at €8.4bn and the NPL ratio at 1.3%, judging the sector capable of absorbing shocks.
- August 2026: KBC reported second-quarter net profit of €1.15bn and raised its 2026 net interest income guidance to about €7.05bn.
- September 2026: the ECB raised its deposit facility rate by 25bp to 2.50% effective 16 September, following a first increase in June.
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