Crypto and your tax return in Belgium: what to prepare

You are preparing your tax return and you hold crypto. Before looking for a box or a rate, gather the facts: which transactions did you carry out, over which period, and in what circumstances? A clear file lets your situation be examined without starting from an incomplete figure.

What follows is a preparation method for private individuals in Belgium. It helps organise the information to be analysed; on its own it does not determine how your transactions are treated for tax.

1. Identify the year concerned

Tell the income year apart from the assessment year. The official explanatory notes to the 2026 return concern assessment year 2026 for income from the year 2025. Transactions carried out in 2026 should therefore not be folded automatically into the file for 2025 income. Source: FPS Finance, explanatory notes to the 2026 return (in French).

Note that period in your file. Add the earlier acquisitions needed to understand the assets sold or exchanged during the year. If you moved between countries, note the dates and prepare the documents about your residence: that point has to be settled before any tax analysis.

2. List every transaction, even without a bank withdrawal

Do not build your file only around the euros that reached your account. The list of questions published in 2022 by the Advance Rulings Service (Service des Décisions Anticipées) asks for the dates and amounts of purchases, sales and conversions between cryptocurrencies. That source shows why a complete inventory matters; it is not a set of instructions for the current return. Source: Advance Rulings Service, list of questions on cryptocurrencies (in French).

In your inventory, separate:

• purchases and sales against euros or other currencies;

• exchanges between crypto-assets;

• transfers between your own exchanges and wallets;

• assets received as pay, as a gift or through an inheritance;

• staking rewards, lending, mining and other activities, if you carried any out.

The list is there to avoid omissions, not to presume that every line is taxable. For internal transfers, match the send to the receipt so the same movement is not counted twice. Our guide to preparing your crypto transaction history sets out how to collect the files.

3. Make the amounts verifiable

Prepare a working table with the date, the exchange or wallet, the type of transaction, the asset, the quantity, the fees and the reference of the supporting document. Keep the original exports separately.

Where a euro valuation is needed for the analysis, state its source and the moment used. If a tool produced a report, keep its settings and flag the transactions it did not recognise. A total worked out from incomplete data has to stay labelled as provisional.

For example, a sale visible on one exchange is not enough to explain a result if the purchase was made several years earlier on another account. Flag the missing acquisition and look for its document, rather than quietly replacing the amount with an estimate.

4. Explain how you invest

Add a short factual note: the date of your first investments, how they were funded, how often you trade, how long you hold, any borrowing, and any use of automated software. Mention crypto activities linked to your work, or carried out for other people.

The Advance Rulings Service questionnaire cited above covers, among other things, strategy, borrowing and the place crypto holds in your movable assets. Set out your facts with their supporting documents, without turning one feature on its own into a tax conclusion. "I hold my assets for a long time" is no substitute for examining the whole file.

5. Document the accounts and the open questions

For each exchange you used, keep the identity of the contracting entity, the country, your account identifier and whatever opening or closing dates are available. FPS Finance sets out how foreign accounts are reported to the National Bank of Belgium's central point of contact (PCC) and in the tax return. It expressly mentions cryptocurrency accounts held abroad and advises declaring them, while stating that the exact obligations may change. Keep those accounts with a foreign provider apart from the wallets whose private keys you hold yourself: the page says nothing about how the latter are treated. Have your situation clarified if needed. Source: FPS Finance, foreign accounts (in French).

Finish with a precise list of the points to settle: missing data, how a reward is treated, an uncertain valuation, or an obligation attached to an account. You can then look at the rules applying to the period concerned before carrying any amounts over.

Taking stock of your file

See our crypto tax support service. To go over the information to gather, book a free 30-minute video call, with no obligation.

Sources consulted on 16 September 2026: FPS Finance and the Advance Rulings Service. The 2022 questionnaire is cited as a documentary reference, not as the state of the law in 2026.