ARTICLE
15 January 2026

Cryptocurrency Tax Litigation Evidence (Part ii): Evidence, Burden Of Proof, And Managing Risk Of A CRA Tax Audit Or CRA Tax Reassessment

RS
Rotfleisch & Samulovitch P.C.

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Rotfleisch Samulovitch PC is one of Canada's premier boutique tax law firms. Its website, taxpage.com, has a large database of original Canadian tax articles. Founding tax lawyer David J Rotfleisch, JD, CA, CPA, frequently appears in print, radio and television. Their tax lawyers deal with CRA auditors and collectors on a daily basis and carry out tax planning as well.
Cryptocurrency tax litigation in Canada increasingly turns on evidentiary rigor rather than theoretical tax characterization.
Canada Tax
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Cryptocurrency tax litigation in Canada increasingly turns on evidentiary rigor rather than theoretical tax characterization. As CRA tax audit activity intensifies and CRA tax reassessment exposure expands across digital asset users, Canadian taxpayers involved in cryptocurrency trading, DeFi participation, NFTs, or exchange failures face heightened scrutiny. In this enforcement environment, evidence—not intent alone—often determines the outcome of Canadian cryptocurrency tax litigation.

From the perspective of an experienced Canadian crypto tax lawyer, the most common weakness in cryptocurrency disputes is inadequate documentation. During a CRA tax audit, the Canada Revenue Agency expects taxpayers to substantiate ownership, intention, valuation, and transactional history across decentralized and centralized platforms. When these expectations are not met, a CRA tax reassessment almost invariably follows.

Burden of Proof in Canadian Cryptocurrency Tax Litigation

In tax litigation, including Canadian cryptocurrency tax disputes, the burden of proof generally rests with the taxpayer. Once the CRA issues a CRA tax reassessment, the factual assumptions underlying that reassessment are presumed to be correct unless the taxpayer can demolish them with credible, reliable, and contemporaneous evidence.

This burden of proof is particularly significant in cryptocurrency tax litigation, where CRA tax audit assumptions often relate to business income characterization, adventure in the nature of trade, or unreported gains. A Canadian tax litigation lawyer will typically focus on identifying which CRA assumptions can be challenged and whether sufficient evidence exists to do so effectively.

Unsupported assertions, reconstructions prepared after a CRA tax audit has commenced, or incomplete exchange records rarely succeed before the Tax Court of Canada.

CRA Tax Audit Expectations and Cryptocurrency Evidence

During a CRA tax audit involving cryptocurrency, CRA auditors routinely request extensive documentation, including exchange statements, wallet addresses, blockchain transaction histories, funding sources, and explanations of trading strategy. CRA tax audit practices now regularly incorporate blockchain analytics and third-party reporting to identify discrepancies.

Where documentation gaps exist, a CRA tax reassessment often follows on the basis that income is unreported, losses are unsubstantiated, or activity constitutes a business. From a Canadian tax litigation lawyer's perspective, CRA tax reassessments in cryptocurrency cases frequently rely on adverse inferences drawn from missing or inconsistent records.

Courts continue to place greater weight on contemporaneous evidence created before the CRA tax audit than on summaries or explanations prepared after reassessment.

Business Income, Adventure in the Nature of Trade, and Cryptocurrency

Determining whether cryptocurrency activity constitutes business income or capital gains remains central to many CRA tax reassessments. Canadian courts assess intention, frequency of transactions, market knowledge, time devoted, and financing methods when determining whether an activity amounts to an adventure in the nature of trade.

The principles articulated in Happy Valley Farms Ltd. v. The Queen are particularly relevant in cryptocurrency tax litigation, as they emphasize intention at the time of acquisition. In the digital asset context, this analysis applies to high-frequency trading, arbitrage strategies, DeFi yield activities, and NFT creation or resale.

A seasoned Canadian tax litigation lawyer will ensure that documentary evidence aligns with these legal criteria when responding to a CRA tax audit or advancing a notice of objection.

DeFi, NFTs, Exchange Failures, and CRA Tax Reassessments

CRA tax reassessments involving DeFi activity present unique challenges. Liquidity pools, staking arrangements, and protocol failures often complicate proof of ownership, disposition, and loss realization. Similarly, NFT creators and NFT traders face CRA tax audit scrutiny depending on whether their activities resemble commercial exploitation or speculative investment.

In exchange failure cases, CRA tax reassessments frequently dispute whether a loss has been realized and, if so, when. Taxpayers must often establish both the legal and economic finality of the loss—an evidentiary burden that can be difficult without proper documentation.

These disputes commonly proceed from CRA tax audit to CRA tax reassessment, followed by a notice of objection and, if unresolved, Tax Court litigation.

Pro Tax Tips for Managing CRA Cryptocurrency Enforcement Risk

  • Effective management of CRA tax audit and CRA tax reassessment exposure begins long before litigation.
  • Maintain comprehensive, contemporaneous records across all exchanges, wallets, and protocols.
  • Document intention, trading strategy, and time commitment consistently and contemporaneously.
  • Do not assume technological complexity will excuse evidentiary gaps during a CRA tax audit.
  • Engage a Canadian tax litigation lawyer early to evaluate risk and prepare for a potential notice of objection or Tax Court appeal.

Frequently Asked Questions on Cryptocurrency Evidence and CRA Audits

Who bears the burden of proof after a CRA tax reassessment?

In Canadian tax litigation, the taxpayer generally bears the burden of disproving the CRA's assumptions.

Is blockchain data sufficient during a CRA tax audit?

Blockchain records are useful but rarely sufficient on their own without corroborating evidence linking transactions to the taxpayer.

How does the CRA treat losses from collapsed exchanges or DeFi protocols?

CRA tax reassessments often challenge valuation, timing, and realization, making detailed evidence critical.

Should I retain a Canadian tax litigation lawyer during a CRA tax audit?

Early involvement of a Canadian tax litigation lawyer can significantly improve outcomes at the notice of objection and litigation stages.

Conclusion: Evidence as the Core Risk Factor in Cryptocurrency Tax Litigation

As CRA tax audit activity and CRA tax reassessment enforcement continue to expand, evidence has become the decisive factor in Canadian cryptocurrency tax litigation. From audit to reassessment, notice of objection, and Tax Court proceedings, taxpayers who cannot substantiate their position face substantial financial and penalty exposure.

Strategic evidence management, guided by an experienced Canadian tax litigation lawyer, is essential in navigating CRA enforcement in the digital asset space.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

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