Form 1099-DA and TIN Compliance: What Digital Asset Brokers Need to Know Now

What Form 1099-DA Requires

Form 1099-DA — Digital Asset Proceeds From Broker Transactions — is the IRS's information return for digital asset sales and exchanges. It applies to custodial brokers: cryptocurrency exchanges, hosted wallet providers, digital asset kiosks, and payment processors that facilitate digital asset transactions for customers.

The reporting requirements are phasing in over two years:

Tax Year	What Must Be Reported
2025 (forms due early 2026)	Gross proceeds from digital asset sales
2026 and beyond	Gross proceeds plus cost basis for covered securities

For 2025, the IRS has indicated it will not impose penalties for incorrect or late 1099-DA filings as long as brokers make a good faith effort to file correctly and on time. That transitional relief doesn't extend to willful non-compliance — and it doesn't protect brokers from backup withholding obligations tied to missing or invalid customer TINs.

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Who Is Covered

The broker reporting rules under the final regulations apply to entities that take custody of digital assets being sold by their customers. That includes:

• Centralized cryptocurrency exchanges (Coinbase, Kraken, Gemini, etc.)
• Hosted wallet providers that facilitate sales
• Digital asset kiosks (Bitcoin ATMs) that effect sales on behalf of customers
• Payment processors that handle digital asset transactions (PDAPs)

Decentralized exchanges and purely on-chain transactions where no custodial broker is involved are not covered under current rules. The IRS has provided temporary relief from reporting for certain DeFi transactions until further guidance is issued.

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The TIN Problem for Digital Asset Brokers

For traditional 1099 filers, TIN collection happens through a W-9 request — a standard, familiar process. For digital asset brokers, the challenge is scale and timing. Exchanges may have millions of customers who onboarded during a period when TIN collection wasn't required or wasn't enforced — and now need to file 1099-DAs for those customers' 2025 transactions.

The specific TIN-related problems that surface at scale:

Missing TINs Customers who onboarded before rigorous KYC requirements may not have a verified TIN on file. Without a TIN, the broker is required to apply 24% backup withholding on reportable transactions.

Unvalidated TINs A customer provided a TIN at onboarding, but it was never checked against IRS records. Self-reported TINs are frequently incorrect — transposed digits, SSN vs. EIN confusion, name formatting that doesn't match IRS records. An unvalidated TIN that fails IRS matching is treated the same as a missing TIN for backup withholding purposes.

Name/TIN mismatches The IRS matches the name and TIN combination — not just the TIN alone. A customer whose legal name on file doesn't match their IRS record will generate a mismatch, even if the TIN number itself is correct.

Foreign customer misclassification Customers who identified as non-US persons at onboarding but whose transactions suggest US tax residency create a separate compliance exposure. Brokers need a process to identify and re-classify these accounts before filing.

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The Backup Withholding Relief Provision

The IRS regulations include a specific backup withholding relief provision that makes TIN matching directly relevant to digital asset brokers' compliance position.

For 2026 transactions, brokers are relieved from backup withholding obligations for any transaction where:

• The broker obtained the customer's TIN
• The broker submitted the customer's name and TIN to the IRS TIN matching program
• The IRS confirmed the name/TIN combination matches records

In other words: running your customer TINs through IRS TIN matching is the documented path to backup withholding relief. Brokers who skip this step and file with unvalidated TINs carry both the backup withholding obligation and the penalty exposure that comes with incorrect information returns.

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What Good TIN Compliance Looks Like for Digital Asset Brokers

Step 1: Identify gaps in your customer TIN data Run your full customer database to identify accounts with missing TINs, unverified TINs, or TINs that have never been submitted to IRS matching. This is your liability map.

Step 2: Collect missing TINs For customers with missing TINs, trigger a W-9 collection workflow. For US persons, this means a Form W-9. For non-US persons, the appropriate W-8 series form. Customers who refuse to provide a TIN are subject to 24% backup withholding on their transactions.

Step 3: Validate all TINs against IRS records Submit your customer name/TIN combinations through IRS TIN matching — not just at onboarding, but before filing season. This catches the stale data problem: customers who provided a correct TIN two years ago but whose legal name has since changed.

Step 4: Resolve mismatches before filing For customers whose TIN/name combination fails matching, follow up for corrected information before filing their 1099-DA. Document every outreach attempt — this is your reasonable cause record if penalties are ever assessed.

Step 5: Apply backup withholding where required For customers who don't respond and whose TIN remains unvalidated, backup withholding at 24% must be applied to reportable transactions going forward. Document the withholding in your records and remit to the IRS on schedule.

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How TIN Comply Helps Digital Asset Brokers

TIN Comply is built for the scale and workflow that 1099-DA compliance requires:

• Bulk TIN Matching — submit your full customer list in a single file and receive IRS match results across all records. No per-record manual processing
• API Integration — embed TIN validation directly into your customer onboarding flow so new accounts are validated at registration, not at filing time
• EIN Lookup — for customers whose TIN returns a mismatch, cross-reference millions of business records to find the correct identifier
• W-9 Collection — automated outreach, digital W-9 collection, and instant TIN validation in one workflow for customers with missing documentation
• Audit Trails — every validation result logged with a timestamp, exportable for IRS documentation and internal compliance review

Start a free trial and run your customer TIN file through IRS matching before your 1099-DA filing deadline.

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Bottom Line

Form 1099-DA is in effect now. Digital asset brokers filing for 2025 transactions need accurate customer TIN data — not just on file, but validated against IRS records. The brokers who built that process during 2025 are in a clean position. The ones who didn't are filing with unknown exposure and have a narrow window before 2026 mandatory basis reporting raises the stakes further.

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This article is for informational purposes only and does not constitute legal or tax advice. Consult a qualified tax professional for guidance specific to your organization.