Form 1099-DA: what it is and why your records matter more than ever

The rollout happens in stages, and the staging is where taxpayers can get hurt.

The timeline

The form implements the broker reporting rules of section 6045 of the Internal Revenue Code, which Congress extended to digital assets in the Infrastructure Investment and Jobs Act of 2021. Treasury and the IRS spelled out the details in final regulations published July 9, 2024 — T.D. 10000, 89 FR 56480 — and the form itself, formally Digital Asset Proceeds From Broker Transactions, is filed with the IRS with a copy furnished to you.

For transactions beginning in 2025, brokers report gross proceeds: the total amount you received when you sold or exchanged a digital asset. For transactions beginning in 2026, brokers also begin reporting cost basis, meaning what you originally paid.

The definitions matter. Under the IRS instructions for Form 1099-DA, a digital asset is covered only if it was acquired in an account for which the broker provides custodial services and held there until the broker disposes of it. A unit transferred in from a private wallet or another platform is noncovered no matter when you bought it — the receiving broker never saw the purchase, so it has no basis to report.

The zero-basis problem

That one-year gap creates what practitioners call the zero-basis problem. When the IRS receives a form showing proceeds but no basis, its systems can treat the entire proceeds amount as gain.

Work the arithmetic and the stakes get concrete. On the real numbers, that taxpayer reports a $1,000 gain on Form 8949; at a 24 percent marginal rate, the tax is $240. If the IRS’s matching systems instead see $10,000 of unexplained proceeds, the proposed tax at that same rate is $2,400 — ten times the correct amount on the same trade. The distortion works on losses, too: sell for $10,000 what you bought for $12,000 and you have a $2,000 loss, but a proceeds-only report can present the sale as $10,000 of gain. Where your actual gains land depends on your bracket and holding period, which our 2026 crypto tax rates guide covers.

The mismatch usually surfaces as a CP2000 notice — the IRS’s document-matching proposal, not a bill and not an audit. Our CP2000 guide walks through that notice in detail. Taxpayers who cannot document their basis face inflated notices and the burden of proving what they paid.

And the problem does not fully expire when basis reporting begins. Brokers report only the basis they have: units you move between platforms arrive without a purchase history attached, exchanges shut down and take their records with them, and each broker sees only its own account. Even in 2026 and beyond, a large share of forms will carry proceeds with no basis — or a basis that does not match your books.

If your Form 1099-DA is wrong

A Form 1099-DA is an information return. It tells the IRS what your broker knows, which is not the same as what you owe. When a form overstates your gain — most often because basis is missing — the response is methodical:

• Start from your records, not the form. Assemble acquisition dates, amounts paid, and fees for every unit you sold, from your own exports and statements.
• Report the correct figures on Form 8949. Your return is where gain is actually computed. Report your true basis with documentation behind it rather than adopting an inflated number because it matches the form.
• Ask the broker to correct the form. Brokers can issue corrected Forms 1099-DA. A corrected form is not required for you to file accurately, but it prevents the mismatch from surfacing later.
• Keep the paper trail. If the IRS questions the difference, your documentation is the answer. Save it with the tax year’s records.
• If a notice arrives, respond inside the window. A CP2000 built on a proceeds-only form is a proposal, and proposals are corrected with records. Our CP2000 guide and IRS letter decoder cover the letters this process generates.

What not to do

• Do not ignore the form. The IRS has its copy, and matching is automated. A mismatch you never address becomes a proposed assessment.
• Do not copy an inflated form onto your return to avoid a mismatch. That converts a paperwork problem into real tax you did not owe.
• Do not wait for a notice to reconstruct your records. Platforms disappear; the export you can download today may not exist next year.
• Do not guess at basis. Expect to have to prove what you paid. A reconstructed number with documentation behind it is worth far more than a round-number estimate.

And if reconciling broker forms against your own history turns up years that were never reported at all, that is a solvable problem with established paths — our guide to unreported crypto walks through the options.

Current relief

The IRS has acknowledged the transition problem. Notice 2026-20 extends temporary relief on the adequate-identification rules — how taxpayers specifically identify which units of a digital asset were sold when their broker cannot yet accept those instructions — through December 31, 2026, giving the reporting system time to mature. That relief concerns the identification of units; it is not relief from filing obligations or penalties.

The mechanics are worth knowing. The relief, first granted in Notice 2025-7 and now running from January 1, 2025 through December 31, 2026, applies only to units held in a broker’s custody. During that period you may identify the specific units you are selling in your own books and records — by purchase date and time, by purchase price, or by a standing order you record before the sale — without communicating the identification to the broker. If you make no identification at all, the default rule treats your earliest-acquired units in that account as sold first. And under the notice, the units identified in your books control your tax result even when the broker’s form reports something different — which is precisely why the notice warns that broker-reported basis for 2026 transactions may not match your records.

And it does not change the fundamental point for taxpayers: the accuracy of your return still depends on your own basis records.

Separately, proposed regulations under REG-105064-25 would govern how brokers furnish these forms electronically. Published March 6, 2026, the proposal would give brokers an alternative process for obtaining customer consent to electronic-only delivery of Form 1099-DA statements; the written comment period closed May 5, 2026, and the comments are public on the regulations.gov docket. Our founder, Andrew Gordon, submitted a formal comment letter on that proposal through his tax firm and testified at the IRS public hearing on July 8, 2026, because how millions of taxpayers receive these forms affects whether they can actually use them. Both documents are linked, with the public docket records, in our research library.

What you can do now

• Keep your own records of every acquisition: the date, the amount paid, and the fees.
• Export transaction histories from every exchange and wallet you use, because platforms shut down and data disappears.
• Reconcile broker-reported proceeds against your own records before you file.
• If you held digital assets before 2025, confirm how their remaining basis was allocated across your wallets and accounts under the Rev. Proc. 2024-28 safe harbor — wallet-by-wallet tracking has applied since January 1, 2025.
• If you choose specific lots when you sell, record the identification in your own books no later than the sale itself. That timing is what makes it count.
• If a form overstates your gain because basis is missing, your documentation is what corrects it.

The policy question underneath

How this reporting regime is staged — and what happens to the taxpayers caught in the proceeds-only gap — remains a live policy question. Our affiliate, Digital Asset Tax Advocacy, has taken positions on digital asset tax administration issues; you can read about its work on its section of this website. This page, like everything we publish, is educational only.

Common questions

Last reviewed July 30, 2026 · Reviewed by Andrew Gordon, JD, CPA

This page is educational and does not constitute tax or legal advice for your specific situation. For questions about your own filings, consult a qualified tax professional.