A practical companion to the numbers: what actually happens when Bitcoin meets a Belgian succession file
The Question the Rate Tables Don't Answer
If you've looked into Bitcoin inheritance tax in Belgium, you've probably already found the rate tables, including our own breakdown of how European tax rates impact your digital asset legacy across Belgium, France, Luxembourg, and the Netherlands. Spouses and children pay less, distant relatives pay far more, and the exact bracket depends on your region. Rates matter, but they only tell you how much tax applies once everyone agrees on two much harder questions first: what exists, and what is it worth?
For a bank account or a house, those two questions answer themselves. A notary requests a balance statement; a property gets appraised. For Bitcoin, neither happens automatically. That gap is where most of the real risk in Belgian crypto successions actually lives.
Step One: Proving the Bitcoin Exists at All
Belgian succession tax is calculated on the deceased's worldwide estate, and Bitcoin is unambiguously part of that estate. The tax authorities don't treat it as exempt or informal. But an asset can only be taxed, and inherited, if someone can demonstrate it exists.
This is where Bitcoin behaves nothing like traditional wealth. There's no third party, no bank, no broker, no registry, that will send a notary a statement confirming your holdings. If the deceased held their own keys and never documented the fact anywhere accessible, the estate's declared value can be wrong not because anyone lied, but because no one knew to look.
In practice, this means the executor or notary handling the succession needs one of two things:
- Direct evidence: wallet addresses, exchange account records, or a documented storage plan left by the deceased.
- Indirect evidence: transaction history, email records, exchange KYC accounts, or other digital footprints that establish holdings existed.
Services built specifically to reconstruct this picture, such as CryptoLegacy Scanner's audit of email history for exchange and wallet activity, exist precisely because this step so often fails silently. An estate can be settled, taxed, and closed while a wallet worth a significant sum sits untouched simply because no one connected to the succession knew it was there.
Step Two: Valuing It Correctly (and On the Right Date)
Once Bitcoin holdings are established, Belgian succession tax requires a valuation as of the date of death, not the date the succession is filed, not the date the executor discovers the wallet, and not an average over some convenient period. Given Bitcoin's volatility, the difference between the date of death and the date of filing can represent a meaningful swing in the taxable value, in either direction.
This creates two practical obligations:
- Documenting the exact valuation date and the source used. Belgian tax authorities expect a defensible methodology, typically the closing price on a recognized exchange on the date of death, converted to EUR. An estimate pulled together months later from memory won't hold up to scrutiny.
- Valuing each asset separately if holdings span multiple wallets or exchanges. Bitcoin held across several addresses or platforms still needs to be aggregated and valued consistently, which is harder than it sounds once cold storage, exchange accounts, and any lending or staking positions are all in play.
Underdeclaring, even unintentionally through incomplete records, carries real consequences: penalties, interest, and in more serious cases scrutiny that extends well beyond the crypto holdings themselves.
Step Three: Understanding What DAC8 Changes
Belgian succession tax on Bitcoin used to rely almost entirely on voluntary disclosure. The estate declared what it knew about, and enforcement depended on that declaration being honest and complete. DAC8, the EU directive extending automatic exchange of information to crypto-asset service providers, changes that foundation.
Under DAC8, crypto exchanges and service providers operating in the EU are required to report account and transaction information to tax authorities, similar to how banks have long reported under existing exchange-of-information frameworks. For successions, this has a direct implication: an estate that fails to declare crypto holdings the deceased held on a regulated exchange is increasingly likely to be caught by a data mismatch, not just an audit.
This doesn't extend the same way to genuinely self-custodied Bitcoin with no exchange trail. DAC8 reports what regulated platforms know, not what's sitting in an undocumented cold wallet. But it does mean the "no one will ever know" assumption that some estates historically relied on for exchange-held crypto no longer holds. For executors and heirs, the practical takeaway is simple: treat crypto holdings on exchanges as already visible to the tax administration, because in most cases, they effectively are.
What Heirs Should Actually Do
Strip away the tax theory and the practical sequence for a Belgian estate involving Bitcoin looks like this:
- Establish what exists, through documentation left by the deceased, or a systematic digital forensics review if none exists.
- Value it as of the date of death, with a documented, defensible source for the price used.
- Declare it in the succession filing alongside traditional assets, applying the applicable regional rate based on the heir's relationship to the deceased.
- Keep the access problem separate from the tax problem. Even correctly declared and taxed Bitcoin is worthless to an heir who can't recover the private keys. Valuation and inheritance tax are only half the challenge; secure, structured access is the other half.
That fourth point is where most of the actual failure happens in practice. Belgian tax authorities are increasingly well-positioned to know that Bitcoin was part of an estate. Whether the heirs can actually access that Bitcoin is a separate question entirely, and it's the one a rate table will never answer for you.
Bitcoin inheritance tax in Belgium isn't just a percentage. It's a chain of correct documentation, timely valuation, and secure access, and it only takes one broken link for a legally sound succession to still end in a permanent loss.