Article 318 of the Income Tax Code 1992 establishes a clear principle: the Belgian tax administration is not authorized to collect information from banking institutions to establish taxes on their clients. This legal foundation still structures the relationship between taxpayer and tax authority, but its exceptions have multiplied in recent years to the point of redefining the actual scope of bank secrecy in Belgium.
Article 318 CIR 92: technical scope and operational exceptions
The protection mechanism is based on a principle prohibition addressed to the tax authority, not to the banks themselves. The administration cannot, in theory, initiate a “bankonderzoek” (bank investigation) without having prior indications of fraud or irregularities. The procedure requires that the taxpayer be informed first and that they can contest the request within a defined timeframe.
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In practice, this protection erodes as soon as an automatic exchange mechanism comes into play. The Central Contact Point (PCC), operational since 2013, already centralizes the account numbers and financial contracts of each Belgian taxpayer. The tax authority has a complete directory of bank accounts, without needing to request anything from the bank itself.
We observe that the distinction between “knowing that an account exists” and “accessing its contents” remains the last technical lock. This lock is the focus of the current debate, as the Belgian government is considering generalized access to transactions, coupled with algorithmic data mining. To delve deeper into the mechanisms of Belgian bank secrecy, the resources available on bankgeheimen.be detail the applicable legal framework.
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DAC8 and CRS 2.0: tax transparency applied to crypto-assets
The European directive DAC8, transposed into Belgian law with application starting January 1, 2026, marks a turning point for holders of crypto-assets. Belgian financial institutions must now automatically collect and transmit detailed data on crypto-asset users: identity, tax residence, identification numbers, purchase and sale transactions, conversions between cryptos, significant transfers.
The first international automatic exchanges are scheduled for 2027. Specifically, a Belgian resident holding crypto-assets on a foreign platform will have their data transmitted to the SPF Finances by the country where that platform is established, and vice versa.
At the same time, the OECD has adopted CRS 2.0, an updated version of the standard for automatic exchange of information on financial accounts. This update extends the scope to electronic money products and central bank digital currencies. We recommend considering that any digital asset held abroad will be visible to the Belgian tax authority in the medium term.
Enhanced reporting obligations for foreign accounts
Belgian taxpayers with accounts abroad must already declare them to the PCC and in their annual personal income tax return. With CRS 2.0, cross-checking becomes systematic. An undeclared account in a country participating in the CRS automatically generates an alert to the SPF Finances.
- The declaration to the PCC covers bank accounts, life insurance contracts, and, since DAC8, crypto wallets held through regulated providers
- The voluntary regularization period, when still open, remains significantly less costly than an adjustment with penalties and tax increases
- Accounts held in non-participating CRS countries are not invisible: FATCA agreements and bilateral treaties cover an increasing share of jurisdictions
Tax data mining and generalized access to bank transactions
The Belgian government’s project for generalized access to bank transactions represents a paradigm shift. It is no longer about consulting a targeted account after indications of fraud, but about subjecting all banking flows to algorithmic analysis without prior human intervention.
This mechanism raises a fundamental legal issue. Blind computer analysis can trigger tax audits based on statistical patterns, without an agent having identified a specific suspicious behavior. The taxpayer then finds themselves in the position of having to justify perfectly lawful transactions.
Concrete avenues for asset structuring
Protecting one’s savings in this context does not mean concealing income. It is about organizing one’s assets in a way that reduces exposure to algorithmic false positives and documenting the legality of one’s operations.
- Centralize accounts in a limited number of institutions to simplify traceability and avoid inconsistencies between declarations and PCC data
- Systematically keep evidence of atypical movements (donations, real estate sales, inheritances) that could be interpreted as anomalies by an algorithm
- Anticipate the declaration of crypto-assets before the effective entry into force of DAC8 automatic exchanges in 2027, rather than waiting for a forced regularization
- Document exempt income or non-taxable capital gains (normal management of private wealth) with contemporaneous evidence of the operation
UBO register and transparency obligation on corporate structures
The UBO (Ultimate Beneficial Owner) register requires Belgian companies, non-profit organizations, and foundations to declare their beneficial owners. Although distinct from bank secrecy in the strict sense, the UBO register complements the information network accessible to the tax authority. A corporate structure used to hold financial assets is no longer an opaque shield.
Discussions around a potential overhaul of the UBO register (sometimes referred to as “UBO bis”) indicate that the trend is towards greater granularity in the information required. We recommend not structuring assets around the opacity of a legal entity: this strategy has a limited lifespan within the current regulatory framework.
Belgian bank secrecy retains a legal basis, but its practical content has reduced to procedural protection: the right to be informed before a bank investigation and the possibility to contest. For a compliant taxpayer, the best protection remains rigorous documentation of each significant asset operation, rather than reliance on a legal principle whose exceptions now exceed the rule.