Bitcoin for Tax Advisors: Guiding Clients on Crypto Assets in Austria

Why crypto now comes up in almost every client conversation

For a long time, Bitcoin was a niche topic for most Austrian tax practices, relevant to a handful of tech-savvy clients but rarely part of the standard intake conversation. That is changing quickly. Under the Krypto-Meldepflichtgesetz, Austria’s implementation of the EU’s DAC8 directive, a mandatory automatic exchange of information on crypto assets has applied since January 1, 2026, similar to what has long existed for bank accounts.

For your clients, this means reporting crypto service providers have been collecting their customers’ transaction data since 2026 and must submit it to the tax authorities by 31 July of the following year, for the first time in 2027. Anyone who assumed crypto gains would stay under the radar needs to rethink that assumption now. For you as an advisor, the practical takeaway is simple: raising the topic proactively is now more useful than waiting for a client to bring it up.

The tax basics, briefly

As a professional, you likely already know the following points, we cover them briefly anyway since they set up everything else. Since Austria’s 2022 eco-social tax reform, income from cryptocurrencies like Bitcoin is treated as capital income, taxed at a flat special rate of 27.5 percent on realized gains. When a domestic crypto service provider is involved, this tax (KESt) has generally been withheld automatically since 2024; otherwise it is declared through the client’s tax return.

For so-called Altbestand, crypto assets acquired on or before February 28, 2021, the pre-reform rules still apply, which can be relevant to how a later sale is taxed. Simply swapping one cryptocurrency for another does not trigger a taxable event in Austria; the acquisition cost carries over. A gain is realized when crypto is exchanged for euros or another fiat currency, and also when it is exchanged for goods or services, which includes paying with Bitcoin (section 27b(3) EStG). If you want more background from a consumer’s perspective, our article How to Buy Bitcoin in Austria covers the buying side in plain language.

The new reporting duty: DAC8 and the Krypto-MPfG

The Krypto-MPfG implements the OECD’s international Crypto-Asset Reporting Framework (CARF) and the EU’s DAC8 directive into Austrian law. The reporting obligation falls on reporting crypto service providers, meaning providers that carry out exchange transactions in crypto assets for their customers, such as exchanges and brokers, not on the individual client. They must submit the data for each calendar year by 31 July of the following year (sections 5 and 19 Krypto-MPfG).

In practice, this means the likelihood of incomplete or incorrect crypto declarations being discovered rises sharply, since tax authorities will have automated access to 2026 transaction data starting in 2027. That shifts the advisory conversation: the question is no longer whether an issue eventually surfaces, but how a client handles it now, while there is still time for an orderly, correct declaration.

Typical situations in client advisory

A handful of recurring situations tend to come up in practice. This overview is not a substitute for a case-by-case review, but it shows what tends to matter in each scenario.

• Private investors with older, undeclared trades. The first step is usually reconstructing a clean transaction history before deciding how to proceed.
• Freelancers or small business owners accepting fees in Bitcoin. Beyond the taxation of any later gain, how the inflow is classified as business income matters too. For VAT, the BMF treats a supply paid for in Bitcoin like one paid for in euros. For the practical side of accepting payments, meaning wallet, payment flow and record keeping, Zapfinity can be a useful starting point for clients.
• Companies holding crypto assets on the balance sheet. Here, accounting questions around valuation and disclosure come on top of the income tax picture.
• Clients actively asking about their own reporting obligations. The new reporting duty is an obvious reason for this question. An early, calm clarification is usually easier than a later correction under time pressure.

How to raise the topic in an intake conversation

A calm, matter-of-fact opening is usually easier than a pointed question about crypto holdings. Three possible approaches:

• Make it a standard intake question. Ask new and existing clients about crypto assets routinely, the same way you would ask about brokerage accounts or foreign bank accounts, rather than leaving it to chance whether the topic comes up.
• Frame the new reporting duty calmly, without alarmism. The message is not panic, it is simply that transparency is easier to achieve by acting now than by reacting later to an inquiry from the tax office.
• Ask about the data first, not the assessment. What platforms and wallets were used is the first question. The tax treatment follows afterward, once you have complete records.

What good documentation needs

Regardless of the specific case, a clean crypto declaration needs the same core building blocks: a complete transaction history across every exchange and wallet used, the acquisition date, which decides between pre-reform and new holdings, and the acquisition cost. Where the same cryptocurrency was bought repeatedly at different prices and held in the same wallet, the Austrian crypto regulation (KryptowährungsVO) requires the moving average price for gains realized after 31 December 2022.

For clients who have been active across multiple platforms for years, this is often the most time-consuming part of the engagement, though a manageable one. Several specialized crypto tax software providers now offer automated reporting that can provide a useful first pass, but the output still needs professional review before it goes into a filing.