Voluntary Disclosure for Crypto Gains

You did not declare your crypto gains in Germany, or not completely? A voluntary self-disclosure under Sec. 371 of the German Fiscal Code (Abgabenordnung) lets you correct that with immunity from prosecution, as long as you act before the tax office catches up with you. Three conditions must be met: the disclosure must be complete, it must be timely, and you must pay the back taxes plus interest. Sounds simple, is not: an incomplete disclosure protects nothing. That is why the clean preparation of your transaction data is the decisive part, and exactly that is my specialty.

Since 2026 the clock runs faster: crypto exchanges in the EU are obliged to report their customers transaction data to the tax authorities. Once your case counts as discovered, the disclosure route is blocked. The window does not close someday, it closes foreseeably.

When you need a voluntary disclosure

• You made gains with Bitcoin or altcoins years ago and never declared them, assuming nobody would care.
• You declared your sales but forgot staking rewards or lending interest, which are taxable as other income. Airdrops count too, whenever you did something for them, even just a social media post or sharing your data.
• You traded on foreign or decentralized platforms and assumed German tax offices would never know.
• You sold, swapped or paid with coins within the one-year holding period without knowing that even crypto-to-crypto swaps are taxable disposals (Federal Ministry of Finance circular of 6 March 2025).
• Your tax assessment is final, but you know the numbers are wrong.

Even if you filed wrongly out of ignorance, you should act. Whether a voluntary disclosure or a simple correction is the right instrument depends on the case, more on that below. Background reading: Tax evasion with cryptocurrencies.

The requirements for immunity

Completeness: all or nothing

The disclosure must cover all non-time-barred tax offenses of one tax type, at minimum those of the last ten calendar years (Sec. 371 para. 1 Fiscal Code). Declaring only what the office would probably find anyway earns no immunity: partial disclosures have been ineffective since 2011. For crypto, completeness means: every exchange, every wallet, every DeFi contract, every swap, across all years. This is where disclosures fail when the data base is patchy.

Timing: before it is too late

Immunity is blocked once one of the events in Sec. 371 para. 2 has occurred. The most important ones:

• An audit order was served on you or your representative.
• The initiation of criminal or administrative fine proceedings was announced to you.
• An official appeared, for instance for an audit or inspection.
• The offense was already discovered in whole or in part and you had to reckon with it.

The last point becomes the core risk now: once exchange data flows into the tax office automatically, discovery can occur without you noticing. A letter with specific questions about your crypto is an alarm signal, but depending on the procedural stage there is still room to act. That is the first thing I assess, if needed together with the tax office representation.

Payment: taxes plus interest

Immunity requires paying the evaded taxes within the set deadline, plus evasion interest of 0.5 percent per month, i.e. 6 percent per year (Sec. 235 Fiscal Code). Above 25,000 euros per offense there is no automatic immunity anymore: proceedings are only dropped against an additional surcharge under Sec. 398a Fiscal Code, staged from 10 percent (up to 100,000 euros) over 15 percent (up to 1 million) to 20 percent (above). Expensive, but in practically every case cheaper than criminal proceedings ending in conviction.

2026: why the window matters now

With the new EU reporting obligations (DAC8) and the international crypto reporting framework (CARF), crypto service providers have been recording their customers transaction data since January 1, 2026. The first reporting wave for 2026 must reach the Federal Central Tax Office by July 31, 2027, after which EU states exchange the data automatically. The German legal basis is the Crypto Asset Tax Transparency Act, passed in December 2025. Practically: the years in which the tax office saw crypto only through individual exchange requests are over. File your disclosure before your data is reported and processed, and you stay ahead of discovery. Wait, and the only thing left may be criminal defense.

Correction or voluntary disclosure: the difference

The terms get mixed up constantly, yet the distinction is decisive. Correction under Sec. 153 Fiscal Code: you filed wrongly without knowing and only now notice the error. Then you are obliged to correct without delay, and no criminal proceedings are at issue. Voluntary disclosure under Sec. 371: the accusation in the room is that you knew or accepted the risk. Then the correction must meet the strict disclosure requirements, otherwise it protects nothing. The line between the two is fluid and legally delicate: a correction dressed up as harmless that the office treats as a failed disclosure is the worst of all outcomes. That is why I build every late declaration of crypto gains so that, in doubt, it withstands the requirements of a complete voluntary disclosure.

How the disclosure works with me

1. Confidential initial consultation. We clarify the facts: which years, which platforms, which activities. You get an honest assessment of whether and how fast action is needed. I respond within 24 hours.
2. Data reconstruction. The hard part. I work with CoinTracking and the usual tools daily and reconstruct difficult histories: closed exchanges, deleted accounts, DeFi transactions no standard import captures, as in Crypto Reporting & Audit.
3. Tax calculation across all years. FIFO-compliant gain calculation under Sec. 23 EStG, classification of staking, lending and airdrops, loss offsetting, holding period checks. You know to the euro what is coming, interest included, before anything is filed.
4. Strategy and filing. Drafting and filing the disclosure with the competent tax office. In cases with criminal complexity I bring a specialized defense lawyer into the team, in coordination with you. The tax side stays with me.
5. Support until closure. Follow-up questions, review of the amended assessments, monitoring of payment deadlines. The case is closed for me when the proceedings are dropped, not before.

What a voluntary disclosure costs

No serious flat rate exists, because the effort depends almost entirely on the data situation: number of years, platforms, DeFi share, quality of your existing exports. After the initial consultation and a look at your data you receive a concrete effort estimate before you decide. The consultation itself costs nothing. For perspective: the fee is regularly the smallest item next to back taxes and interest, and a professionally built disclosure protects exactly the validity everything depends on.

100% confidential

As a German tax advisor I am bound by the statutory duty of confidentiality. Nothing you tell me leaves the room. That holds from the first call to the final assessment.

Limitation periods: which years still count

Two periods run in parallel and are often different in length. For tax assessment, the limitation period in cases of tax evasion is ten years (Sec. 169 para. 2 sentence 2 Fiscal Code), so the office can reassess that far back. For criminal prosecution, simple tax evasion expires after five years, particularly serious cases only after fifteen (Sec. 376 Fiscal Code). A valid disclosure must in any case cover at least the last ten calendar years. Which years are still open in your case I check at the start, because it determines the scope and the amount you will repay.

The Sec. 398a surcharge in detail

Above 25,000 euros of evaded tax per offense there is no automatic immunity. Proceedings are only dropped if, on top of tax and interest, a surcharge under Sec. 398a Fiscal Code is paid, staged by amount: 10 percent up to 100,000 euros, 15 percent up to one million and 20 percent above. The surcharge is calculated per offense, not on the total. Even so, the combination of tax, interest and surcharge is almost always cheaper than a conviction with a record and defense costs. I calculate your realistic total before filing.

When the tax office is already asking

A letter with specific questions about your crypto activity is an alarm signal, but not automatically the end of the disclosure route. What matters is whether a blocking event under Sec. 371 para. 2 has already occurred, such as a served audit order or the initiation of proceedings. As long as that is not the case, room to act remains, but it is narrow and every day counts. If a blocking event already happened, it is no longer about immunity but about orderly damage control, then I work closely with a specialized defense lawyer on the criminal side while handling the tax side and the communication with the tax office.

Disclosure with several people involved

For spouses assessed jointly, caution is required: a joint tax return does not mean a joint disclosure is enough. Each person is assessed individually under criminal law, so as a rule everyone involved needs their own complete disclosure. The same applies to partners, heirs or authorized persons who had access to the accounts. I clarify at the start who has to declare, so that an incomplete constellation does not endanger validity for everyone.

Common myths about voluntary disclosure

• It can be anonymous. No. A valid disclosure is by name and assigns the amounts concretely.
• Declaring only what they would find anyway is enough. No. Partial disclosures have been ineffective since 2011; completeness across all years is required.
• A tool export is a sufficient basis. No. Unchecked reports contain errors that can topple the calculation and with it the validity.
• As long as no letter arrives, everything is open. Not necessarily. With automatic exchange reporting, discovery can occur without you noticing.

What applies after the disclosure

With the disclosure the past is cleaned up, but the future has to stay clean. Anyone still active in crypto needs correct ongoing records from now on, otherwise the problem starts again. I set up the documentation so the coming years are right from the start, on request as part of ongoing crypto tax advisory. The disclosure is then not a one-off patch but the starting point for lasting legal certainty.

As of June 2026. This text is general information and does not replace individual advice. In a confidential initial consultation we clarify whether and how fast you need to act, within 24 hours.