Supreme Court to Decide If the IRS Can Access Your Crypto Data Without a Warrant — What Harper v. Werfel Means for You
By Seth C. Little, J.D., LL.M. (Tax)
The Supreme Court is now considering a groundbreaking case with major implications for cryptocurrency users in the United States. Harper v. Werfel centers on whether the IRS can collect your crypto transaction data from platforms like Coinbase without a warrant—and the decision could reshape digital privacy rights in the age of blockchain.
What Is the Harper Case About?
In 2016, the IRS issued a "John Doe" summons to Coinbase, requiring the exchange to hand over financial records of more than 14,000 customers. One of those users, James Harper, claims he was blindsided. He said he had properly reported his Bitcoin activity on his tax returns and received no prior notice before getting a letter from the IRS in 2019 suggesting he may have underreported income.
Harper sued, arguing that the IRS violated his constitutional rights by obtaining his data without a warrant or notifying him beforehand.
The Legal Issues at Stake
At the core of the case are two constitutional arguments:
Fourth Amendment: Harper says his financial data is protected from unreasonable searches and seizures. He argues that the government should have needed a warrant based on probable cause to access his Coinbase records.
Fifth Amendment: Harper also claims the IRS violated his due process rights by failing to inform him or give him a chance to challenge the data request before it happened.
The IRS, meanwhile, relies on the long-standing "third-party doctrine." This legal principle holds that individuals don’t have a reasonable expectation of privacy for information voluntarily shared with third parties—like banks or cryptocurrency platforms.
Lower courts, including the First Circuit Court of Appeals, agreed with the IRS. But Harper appealed to the Supreme Court, which has now agreed to hear the case.
Why This Case Matters to Crypto Holders
If you’ve ever traded, sold, or held cryptocurrency, this case could directly affect your privacy and your obligations when dealing with the IRS.
If the Supreme Court sides with the IRS: The government will likely continue to use broad John Doe summonses to gather bulk crypto data from exchanges. This could increase audits, investigations, and enforcement actions against individuals suspected of underreporting crypto gains.
If the Court rules in favor of Harper: The IRS could be forced to obtain individual warrants or court orders based on specific suspicion—raising the bar for how and when they can access your digital financial records. This would offer stronger privacy protections for crypto users across the board.
What Should You Do Now?
Regardless of the outcome, crypto investors and traders should:
-Keep accurate records of all cryptocurrency transactions.
-Report all taxable crypto activity on your tax returns, including trades, conversions, and earnings from staking or mining.
-Be aware that the IRS is actively enforcing crypto tax compliance and using advanced tools and data analytics to track activity—even before the Court rules on Harper.
Final Thoughts
Harper v. Werfel could be a landmark decision that updates constitutional privacy rights for the digital age. As crypto becomes more mainstream, the balance between tax enforcement and personal privacy is increasingly under the spotlight.
The Supreme Court’s ruling will set the tone for how far the government can go in monitoring your crypto activity—without ever knocking on your door.
Need help with crypto tax compliance or responding to an IRS letter? Contact Jeffords Anthony, PLLC for a confidential consultation.
