Form 1099-DA for S Corporations: How to Reconcile Crypto Transactions Before Filing

Starting with transactions occurring on or after January 1, 2025, digital asset brokers that take custody of customer assets — including cryptocurrency exchanges, hosted wallet providers, and certain payment processors — are required to issue Form 1099-DA to report proceeds from digital asset sales and exchanges. For S Corporations that hold crypto, trade digital assets, or receive them as payment, these forms began arriving in early 2026 and carry a compliance obligation that goes beyond simply receiving the form. And unlike C corporations, which brokers can generally treat as exempt recipients, S corporations are not exempt from this reporting under the Form 1099-DA instructions — so expect your brokers to file. The real work is reconciliation, and for most subchapter S companies, it needs to happen before the 1120-S is filed.

What Form 1099-DA Reports — and What It Does Not

Form 1099-DA functions similarly to Form 1099-B for traditional securities: it reports gross proceeds from digital asset transactions facilitated by a qualifying broker. What it does not report for the 2025 tax year is cost basis. Under the final regulations, broker basis reporting applies only to covered digital assets acquired on or after January 1, 2026 — meaning that every Form 1099-DA issued for 2025 transactions shows proceeds only, without the acquisition cost needed to calculate gain or loss. S-corp accounting for digital assets therefore requires the S Corporation to independently calculate and document cost basis for every position sold, exchanged, or disposed of during 2025. That basis gap will not fully close in 2026 either: assets bought before 2026, or transferred into an account from an outside wallet, still will not carry broker-reported basis.

The IRS also gave brokers a soft landing for the first year. Under Notice 2024-56, brokers that make good-faith efforts to file and furnish accurate Forms 1099-DA for 2025 sales avoid information-reporting penalties — and a filing can still count as good faith if it lands up to a year after the original due date. This creates a meaningful timing risk: if your S-corp reported digital asset income on its 1120-S for 2025, but a broker issues a late or corrected Form 1099-DA showing different proceeds, the IRS will see a mismatch and may initiate an inquiry. (Related relief in Notice 2024-56 and Notice 2025-33 also waives backup withholding on digital asset sales for 2025 and 2026, so a missing W-9 will not trigger withholding yet.) As covered in our recent article on S-corp audit risk in 2026, we expect 1099-DA mismatches to be caught by IRS automated matching.

How Reconciliation Works for an S Corporation

Reconciling Form 1099-DA S-corp reporting means comparing the gross proceeds on every 1099-DA the S Corporation receives against the digital asset income and gains reported on Form 1120-S. Where figures differ — due to missing cost basis, unreported transactions not covered by broker reporting, or assets moved between wallets before being sold — the S Corporation must document the difference clearly and report income based on its own complete transaction records, not solely on the 1099-DA. For pre-2025 holdings, remember that Rev. Proc. 2024-28 offered a safe harbor for allocating unused basis across wallets and accounts as of January 1, 2025 — if your S-corp made that allocation, it is the starting point for any defensible basis calculation; if it did not, you must substantiate basis under the ordinary recordkeeping rules.

Not all digital asset transactions are covered by broker reporting, complicating S-corp small business taxes compliance here. Congress nullified the separate rule that would have treated DeFi front-ends as brokers — H.J. Res. 25, signed in April 2025, wiped out the DeFi broker regulations — so trades on decentralized exchanges and peer-to-peer transfers generally produce no 1099-DA at all. Brokers using the optional reporting methods can also skip reporting a customer’s qualifying stablecoin sales up to $10,000 in aggregate for the year and specified NFT sales up to $600. But any resulting gain or loss is still taxable and must appear on the 1120-S. A bookkeeper or CPA firm familiar with digital asset S corporation reporting should be tracking transactions at the wallet level throughout the year, not reconstructing them at tax time.

What to Do If Your S Corp Has Digital Asset Activity

The first step is a complete transaction export from every exchange or wallet your S Corporation used during 2025. Cross-reference these against any Forms 1099-DA received. Where the forms and your records agree, document the reconciliation. Where they diverge, determine whether the difference reflects missing basis, an unreported transaction, or a broker error — each has a different resolution path.

Accounting for small business digital assets is an area where errors are expensive. Receipt of a Form 1099-DA is not itself what makes a transaction taxable — your S Corporation’s own records determine what is reportable — but discrepancies between 1099-DA and your 1120-S can trigger automated notices. Establishing clean S-corp accounting practices around digital assets now, before those notices arrive, is substantially less costly than responding to them after the fact.