Crypto fraud tax 2026: When losses are tax-deductible

Legal framework, burden of proof and forensic analysis in scam cases

Victims of crypto fraud are often faced with the question of whether their losses are tax-deductible. For law firms, tax advisors, and compliance teams, the legal situation in Germany in 2026 is complex: While regular crypto losses can be deducted under Section 23 of the German Income Tax Act (EStG), recognition in scam cases encounters structural limitations. This article outlines the current framework and highlights key aspects of tax assessment and forensic documentation within a client's case.

Cryptocurrencies and Section 23 of the German Income Tax Act (EStG) as a tax starting point

Cryptocurrencies are considered under German tax law as other economic assets. Gains and losses from their sale fall under the private sales transactions according to Section 23 of the Income Tax Act (EStG). The decisive factor for the recognition of a loss is whether a Sale transaction im steuerlichen Sinne vorliegt und ob die einjährige Holding period nicht überschritten wurde. Nur innerhalb der Haltefrist realisierte Verluste sind grundsätzlich steuerlich berücksichtigungsfähig; nach Ablauf der Jahresfrist bleiben sie – ebenso wie Gewinne – außer Ansatz.

Furthermore, losses from private sales transactions are only offset to a limited extent: They can only be offset against gains from other private sales transactions in the same year or within the framework of the loss carryforward according to Section 23 Paragraph 3 of the German Income Tax Act (EStG). Offsetting against income from other types of income, such as wages or capital gains, is excluded. For client work, this means that even if a loss is recognized in principle, the tax effect is often reduced to offsetting it against concurrently realized cryptocurrency gains.

Have the tax implications of a scam case reviewed early on – especially if the client has concurrent capital gains during the tax year. A sound assessment tax classification is the basis for every further decision.

Why crypto fraud is not treated like a sale for tax purposes

The core problem with loss recognition lies in the missing consideration. Bei einem regulären Verkauf oder Tausch tritt der Eigentümer die Coins ab und erhält im Gegenzug Fiatgeld oder eine andere Kryptowährung. Bei Scam-Fällen – etwa durch fingierte Trading-Plattformen, Pig-Butchering-Modelle oder Phishing-Angriffe – fließen die Coins vom Opfer ab, ohne dass ein wirtschaftlicher Austausch im steuerrechtlichen Sinne stattfindet. Aus Sicht der Finanzverwaltung fehlt damit ein zentrales Tatbestandsmerkmal des § 23 EStG.

Consequently, tax offices often reject the tax deductibility of such losses. While the economic damage is not disputed, the prevailing opinion is that the rule does not apply due to the lack of a sale transaction. It is important to distinguish this from cases in which the coins were exchanged for worthless assets – for example, tokens from a sham exchange that technically exist but are economically worthless. In such situations, it can be argued that a (loss-making) sale transaction formally took place, even if the received value is economically zero.

In der Praxis lassen sich mehrere Betrugstypen unterscheiden, die steuerlich unterschiedlich zu bewerten sind. Beim klassischen Pig Butchering überweist das Opfer Coins an eine vom Täter kontrollierte Plattform und erhält lediglich eine Guthabensanzeige, die niemals auszahlungsfähig ist – hier fehlt der Austausch. Beim Phishing oder Wallet-Drainer-Angriff werden Coins ohne jede Gegenleistung abgezogen. Bei Diebstahl über kompromittierte Hardware-Wallets fließen Coins unberechtigt ab, ohne dass der Mandant den Vorgang autorisiert hat. Jede dieser Varianten hat eine andere steuerliche Angriffsfläche; eine pauschale Einordnung aller „Betrugsfälle“ als nicht absetzbar greift zu kurz.

Categories of cases for tax recognition of the loss

Despite the restrictive general stance, there are categories of cases in which recognition of loss is possible. The focus is on... Sham purchase scenarios, These are transactions in which the victim exchanges coins for worthless tokens or for a fictitious credit balance. Under certain conditions, such transactions can be classified as taxable sales transactions with a negative result. The crucial factor is proof that a formal exchange took place, even if the received value was economically worthless.

Another category of cases concerns Totalverluste durch Plattform-Insolvenz oder Exit-Scam. Verliert der Mandant Coins, weil eine Börse ihre Auszahlungen einstellt und Insolvenz anmeldet, kann unter Umständen ein Verlust nach § 23 EStG anerkannt werden, wenn der Ausfall als endgültig dokumentiert ist. Auch Verluste durch technische Manipulationen wie das gezielte Umleiten von Transaktionen – etwa Adress-Spoofing oder Clipboard-Hijacking – werden teilweise steuerlich anders bewertet als klassischer Vertragsbetrug. Die Rechtsprechung zu diesen Fallgruppen ist im Fluss; eine pauschale Antwort gibt es nicht, jede Konstellation erfordert eine Einzelfallprüfung anhand der konkreten Transaktions- und Vertragsdaten.

Besondere Bedeutung hat die Abgrenzung bei Diebstahl und Hack. Werden Coins ohne Zustimmung des Eigentümers aus einer Wallet entwendet, etwa durch kompromittierte Private Keys oder Angriffe auf Hot Wallets, liegt nach überwiegender Auffassung ebenfalls kein Veräußerungsgeschäft vor. Der Schaden ist zivil- und strafrechtlich relevant, bleibt aber im Regelfall außerhalb des § 23 EStG. Wurde die Kryptowährung dagegen innerhalb der Haltefrist unter Täuschung in eine andere Position getauscht – etwa in einen wertlosen Scam-Token auf einer manipulierten DeFi-Oberfläche –, kann ein formales Tauschgeschäft mit negativem Ergebnis argumentiert werden. Für die Praxis heißt das: Der konkrete technische Ablauf des Verlusts ist für die steuerliche Einordnung genauso wichtig wie die rechtliche Qualifikation.

Have the type of scam clarified early on – a non-binding initial assessment shows whether tax loss recognition can realistically be pursued.

Required evidence: What tax authorities demand in scam cases

The more complex the legal issue, the more important the documentation becomes. For tax recognition, the following evidence is typically required: complete documentation. Transaction histories with timestamps and counterparty addresses, unambiguous Wallet assignments to the beneficial owner, who Proof of fraud in the form of written communication, platform screenshots or contract documents, as well as a Criminal charges at the responsible public prosecutor's office. In addition, tax authorities expect comprehensible documentation of the asset outflow, showing when which coins were transferred to which address and why this outflow is considered final.

A simple statement of victimization is generally insufficient. Tax authorities increasingly require structured evidence that reconstructs the economic sequence of events and plausibly establishes the link between the client, wallets, and the fraudulent activity. In this context, the following are also... Proof of origin of funds This is relevant because the original deposit of the lost coins must be fully documented. Without this proof, the very basis for a tax claim often disappears. Tax advisors should therefore check as early as possible which data gaps need to be filled before the loss is presented to the tax office.

Typical data sources for evidence include CSV and API exports from the affected exchange, on-chain data on inbound and outbound transactions, chat and email histories with the perpetrators, and screenshots of the fake platform. Each of these sources has its limitations: exchanges delete accounts, fake platforms are taken offline, and screenshots alone are of little value without metadata. Therefore, structured data backup should be carried out as early as possible – ideally concurrently with filing a criminal complaint, while the perpetrators are still actively communicating and platform access is still functioning.

Forensic documentation, criminal complaint and wallet analysis

The forensic preparation It forms the backbone of any reliable loss documentation. A structured forensic blockchain analysis It assigns the transactions to the client, shows the flow of coins from the originating wallet to the perpetrator's recipient addresses, and reveals whether the funds were mixed, exchanged, or converted into fiat currency in the meantime. This analysis is not only relevant for tax purposes but also important for civil claims and criminal proceedings.

The Criminal charges From a tax perspective, this is more than just a formal act. It documents the intent to pursue legal action and is an important indicator for tax authorities that the loss was not fabricated retroactively. A structured legal support This improves the quality of the display and creates starting points for tax arguments. Parallel proceedings – criminal law, civil law, tax law – benefit directly from a shared, forensically developed database, because the same transaction and wallet data serve as the basis in all three lines of inquiry.

Have the forensic documentation prepared early – the longer ago the fraud occurred, the more difficult it becomes to reconstruct reliable transaction chains, especially if coins were moved via decentralized mixers or cross-chain bridges.

When external crypto-forensic support makes sense in a tax mandate

Not every scam case requires specialized forensic analysis. In simple scenarios—few transactions, one platform, clear documentation—the existing data is usually sufficient. Things become complex when clients have suffered losses across multiple wallets, chains, or mixing services, when coins have been exchanged in the meantime, or when the perpetrators professionally employ multi-tiered recipient structures. In such cases, reconstructing the transaction chain is virtually impossible without specialized tools and methods.

The Financial Forensics GmbH supports Law firms, tax advisors and compliance departments We assist with the research, analysis, and legally sound documentation of cryptocurrency fraud cases. Our focus is on the forensic analysis of asset outflows, the identification of relevant recipient addresses, and the structured presentation of information for tax authorities, law enforcement, and civil courts. This collaboration does not replace tax or legal advice but rather provides the reliable data foundation upon which such advice can be provided. The emphasis is on methodological transparency and auditable documentation – criteria that purely victim-based accounts regularly fail to meet.

Bring crypto-forensic expertise on board early – especially in scam cases involving multi-tiered wallet structures or cross-border elements. non-binding case discussion shows the sensible next steps.

Conclusion: Crypto losses due to fraud – documentation determines the tax implications

The tax deductibility of losses from crypto fraud will be difficult in Germany in 2026, but not impossible. Crucially, losses from crypto fraud must be clearly distinguished between classic scams without consideration – where recognition under Section 23 of the German Income Tax Act (EStG) regularly fails – and situations involving a (formal) sale transaction, where tax deductibility can be argued. Between these two extremes lie categories such as platform insolvencies or sham purchases of worthless tokens, each of which must be assessed individually.

For law firms, tax advisors, and compliance teams, the following applies: The legal leeway is limited, but manageable. Those who correctly classify the case and create robust forensic documentation significantly increase their chances of tax relief. Without structured evidence, however, even a theoretically possible loss carryforward remains unattainable in most cases.

FAQs – Frequently Asked Questions about Crypto Fraud and Taxes