The New Reporting Regime Takes Effect
The IRS has begun its first substantive enforcement push under the digital asset broker reporting rules finalized by Treasury in 2024. Beginning with transactions in 2025, brokers—including centralized exchanges, certain payment processors, and, under a phased timeline, some decentralized platforms—must file Form 1099-DA to report gross proceeds from digital asset dispositions. Starting with transactions in 2026, brokers must also report cost basis.
This is not a minor administrative update. It represents a fundamental shift in how the IRS obtains third-party verification of taxpayer activity in digital assets, closing a visibility gap that has existed since Bitcoin's inception. For clients holding, trading, or building on blockchain infrastructure, the compliance stakes have changed materially.
What Form 1099-DA Requires
Form 1099-DA obligates brokers to report:
- Gross proceeds from sales or exchanges of digital assets
- Digital asset transaction identifiers, including wallet addresses and transaction hashes in certain circumstances
- Basis information (beginning with the 2026 tax year)
- Classification of the digital asset type and acquisition date, where determinable
The IRS has signaled that this data will be cross-matched against individual tax returns using automated systems similar to those long used for Form 1099-B securities reporting. Early enforcement priorities appear focused on taxpayers who received a 1099-DA but failed to report corresponding gain or loss—the lowest-hanging fruit for automated underreporter notices (CP2000-type mismatches).
Centralized Exchanges: A Familiar Compliance Model
For centralized exchanges, the compliance burden, while significant, tracks a model familiar from traditional brokerage reporting. These platforms control custody, possess KYC data, and can readily calculate proceeds at the point of sale. The primary friction points involve:
- Basis reconstruction for assets transferred in from external wallets or other exchanges
- Treatment of staking rewards, airdrops, and hard forks as separate cost-basis lots
- Coordinating reporting across multiple accounts held by the same beneficial owner
These are compliance headaches, not existential threats to the reporting model itself.
The Decentralized Platform Problem
The more consequential and legally unresolved issue involves decentralized finance protocols, automated market makers, and non-custodial platforms. Treasury's final regulations extended broker status to certain "trading front-end" platforms that facilitate digital asset sales, even absent traditional custody—a position that generated substantial industry pushback and legislative attention.
Decentralized platforms face valuation and reporting obstacles that do not exist in the centralized context:
- No custodial control over basis data. A protocol executing a swap has no reliable way to know a user's acquisition cost, prior wallet history, or holding period.
- Ambiguous "broker" status. Many DeFi protocols operate through smart contracts with no identifiable operator, making it unclear who bears the filing obligation.
- Valuation at the moment of execution. Automated market maker transactions often involve simultaneous multi-token swaps, liquidity pool entries, and wrapped-asset conversions, complicating any single "proceeds" figure.
- Pseudonymous counterparties. Absent KYC infrastructure, matching a wallet address to a taxpayer identification number is frequently impossible without third-party data requests.
These structural realities have prompted sustained industry commentary urging Treasury to narrow or delay the broker definition as applied to non-custodial software providers. The regulatory posture toward DeFi broker reporting remains in flux, and practitioners should expect continued rulemaking, litigation, and potential legislative intervention in this area.
Practical Enforcement Signals
Based on public IRS guidance and enforcement priorities articulated to date, several patterns are emerging:
- Automated matching first. Expect CP2000 notices generated from 1099-DA/return mismatches before targeted audits of complex DeFi activity.
- Basis disputes will dominate examinations. Because 2025 filings involve proceeds only, taxpayers reporting self-calculated basis should maintain contemporaneous records—exchange statements, wallet transaction histories, and cost basis methodology documentation.
- Voluntary compliance incentives. Taxpayers with historical unreported digital asset activity should evaluate available voluntary disclosure avenues before receiving an IRS inquiry, as post-notice remediation carries materially higher penalty exposure.
- Entity-level exposure for platform operators. Businesses operating exchange-adjacent infrastructure should reassess broker classification risk now, rather than waiting for an IRS examination to resolve the question adversely.
Recommendations for Businesses and Investors
Given the uncertainty surrounding decentralized platform obligations, we recommend the following posture:
- For investors: Reconcile personal records against any 1099-DA received well before filing. Do not assume the form's reported basis (where provided) is accurate, particularly for assets transferred between platforms.
- For exchanges and platform operators: Conduct a broker-status analysis under the final regulations, document the reasoning, and build reporting infrastructure with margin for anticipated technical corrections to the form and instructions.
- For DeFi protocol developers: Monitor ongoing regulatory and legislative developments closely, as the scope of "broker" status for non-custodial software remains one of the most contested unresolved questions in digital asset tax law.
- For all digital asset holders: Treat 2025 as a transition year. Basis reporting requirements arriving in 2026 will substantially increase IRS visibility into unrealized and realized gains, making proactive recordkeeping now the most effective risk mitigation available.
Conclusion
Form 1099-DA marks the beginning of comprehensive third-party reporting for digital assets, but its application to decentralized platforms remains legally and technically unsettled. Taxpayers and businesses operating in this space should treat the current period as a compliance inflection point—one requiring careful documentation, proactive broker-status analysis, and close monitoring of regulatory developments before the basis-reporting phase intensifies IRS scrutiny in 2026.