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In the United States, you report a large over-the-counter (OTC) crypto sale on your own federal income tax return: you answer "Yes" to the digital asset question, list the disposal on Form 8949 and carry the totals to Schedule D, whether or not anyone sends you a tax form. The size of the sale does not create a different tax form for the seller; it adds reporting by other parties around the trade, namely the broker's Form 1099-DA where the counterparty is a broker, and the bank's own obligations when the dollars arrive.
This article covers the federal rules that apply in the United States, with amounts in US dollars. It is general information, not legal or tax advice.
An OTC sale is a sale negotiated directly with a desk, a broker or another holder instead of being placed on an exchange order book. That changes how the price is agreed, not what the Internal Revenue Service (IRS) expects from the seller. It does change how much of the paper trail the seller has to build alone, since a negotiated trade produces only the records the two sides wrote down.
Start dates from the IRS's digital assets guidance; thresholds from FinCEN's currency transaction reporting pamphlet and the federal suspicious activity reporting rule for banks.
What does the seller of a large OTC crypto position have to report?
The seller of a large OTC crypto position reports the disposal on the federal income tax return for the year of the sale, on the same forms as a small sale. The IRS states in its guidance on digital assets that a taxpayer with digital asset transactions must report them whether or not they result in a taxable gain or loss, and its questions and answers on these transactions add that income, gain or loss is reported regardless of the amount or whether you receive a payee statement or information return.
Nothing on those forms depends on the dollar value of the trade: a sale of $3,000 and a sale of $3,000,000 are reported in the same columns. Size matters elsewhere, in the tax that falls due and when it is paid, in the attention the receiving bank gives to the incoming funds, and in the evidence needed to support the cost basis claimed.
The gain itself is the amount you received less your adjusted basis in the units sold, and the IRS's guidance treats a holding of more than one year as long-term and one year or less as short-term. How basis is established and which units are treated as sold is a subject of its own; the point here is where the figures go once they exist.
How do you answer the digital asset question on the return?
A seller who sold, exchanged or otherwise disposed of a digital asset during the tax year answers "Yes" to the digital asset question on the federal return. The IRS words the question as asking whether, at any time during the tax year, you received a digital asset as a reward, award or payment for property or services, or sold, exchanged or otherwise disposed of a digital asset or a financial interest in one.
The question is not limited to individuals. According to the IRS's digital assets guidance, the question appears on Forms 1040 and 1040-SR, Form 1040-NR, Form 1041 for estates and trusts, Form 1065 for partnerships, Form 1120 for corporations, Form 1120-S for S corporations and Form 709 for gifts. A fund organized as a partnership, a family trust or a corporate treasury therefore meets the same question on its own return.
The answer is given under the same signature as the rest of the return, so it should agree with every other record of the year. The IRS lists merely holding digital assets in a wallet or account, without transacting, among the situations where the answer is "No"; the year of the sale is answered differently from the years in which the position was only held.
A sale paid in a stablecoin instead of dollars is still a disposal, with proceeds measured in dollars at the value of what you received. Converting that stablecoin to dollars later is a second disposal, and it is reported too.
How does the sale go on Form 8949 and Schedule D?
The sale goes on Form 8949 line by line, sorted into short-term and long-term parts, and the totals of each part are carried to Schedule D. The IRS's instructions for Form 8949 ask for a description of the asset, the date acquired, the date sold or disposed of, the proceeds, the cost basis, any adjustment with its code, and the resulting gain or loss.
For digital assets, the instructions say the description gives the name or symbol of the asset and the number of units sold. Each page of the form is also marked with a box that says what the broker reported to the IRS, and digital assets have their own set of boxes, separate from those used for stocks and bonds.
| Situation | Held one year or less | Held more than one year |
|---|---|---|
| Form 1099-DA received, basis reported to the IRS | Box G | Box J |
| Form 1099-DA received, basis missing or not reported to the IRS | Box H | Box K |
| No Form 1099-DA received for the transaction | Box I | Box L |
The third row is the one many OTC sellers end up on, and the instructions are explicit that a digital asset transaction with no Form 1099-DA goes under Box I or Box L, not under the boxes used for other property. The form has a place for a sale no broker reported.
Fees need care. The instructions for Form 1099-DA say brokers report gross proceeds net of digital asset transaction costs, and the Form 8949 instructions have you enter a selling cost that is not already reflected in the reported proceeds or basis as an adjustment with its code. In a negotiated trade the fee may be inside the price or invoiced separately: know which before you fill in the proceeds column, and keep the document that shows it.
A position built over several years is rarely one line: units bought on different dates have different bases and holding periods, so one OTC sale can fill several rows.
Will the OTC desk or counterparty send a Form 1099-DA?
Whether a Form 1099-DA arrives after an OTC sale depends on who the counterparty is: a business that meets the IRS's definition of a broker reports the sale, and a private counterparty does not. The IRS's guidance on digital assets describes the brokers concerned as those that take possession of the digital assets being sold, and names custodial trading platforms, certain hosted wallet providers, digital asset kiosks and certain processors of digital asset payments.
The IRS's instructions for Form 1099-DA define a broker as a person who, in the ordinary course of a trade or business, stands ready to effect sales of digital assets to be made by others, and they include a person who effects customers' dispositions as an agent, as a dealer or as a digital asset middleman. A desk that buys from customers for its own book as a regular business is acting as a dealer, so the definition can reach it. The instructions do not mention OTC desks by name, and whether a given desk files depends on facts you cannot see from outside: whether it is a US or a foreign business, in what capacity it dealt with you, and how it has documented you. The reliable way to know is to ask the desk at onboarding whether it will issue a Form 1099-DA for the trade and in whose name.
Three situations commonly leave the seller with no form at all:
- A private counterparty. Another holder, a fund or a company buying for its own account, with no business of effecting sales for others, is not a broker under that definition.
- A non-custodial arrangement. The IRS states that the final regulations do not include reporting requirements for brokers commonly known as decentralized or non-custodial brokers, which do not take possession of the assets.
- A seller that is an exempt recipient. The Form 1099-DA instructions say brokers are not required to report sales made for corporations, subject to an exception for S corporations, or for exempt foreign persons, among other exceptions. A corporate treasury can sell through a reporting broker and still receive nothing.
When a form does arrive, read what it contains. The IRS's guidance sets two start dates: brokers report gross proceeds for transactions on or after January 1, 2025, and basis on certain transactions on or after January 1, 2026. The instructions limit basis reporting to what they call covered securities, broadly digital assets acquired after 2025 in an account where the broker provided custody and held there until the sale. Units bought earlier, or transferred in from your own storage shortly before the trade, are noncovered: the form may show proceeds and leave basis blank. That is the Box H or Box K case, and the basis you enter is the one your own records support.
A copy of Form 1099-DA goes to the IRS, so your Form 8949 should start from its figures and adjust them openly where they are incomplete.
Who reports what, on which form, and by when?
Four parties can have a reporting obligation around one large OTC sale: the seller, the broker if there is one, the bank that receives the dollars, and any business that receives physical cash. The table sets out each one with its form and deadline, as described on the pages of the IRS and of the Financial Crimes Enforcement Network (FinCEN), the Treasury bureau that administers bank reporting.
| Who reports | Form and content | Deadline |
|---|---|---|
| Seller | Digital asset question, Form 8949 and Schedule D with the annual return | Return due date, April 15 for a calendar-year individual |
| Seller | Estimated tax on Form 1040-ES | The payment date that follows the period of the sale |
| Broker, where the counterparty is one | Form 1099-DA: gross proceeds, and basis for covered assets | Statement to the customer in mid-February, filing with the IRS by the end of March when filed electronically |
| Bank receiving physical currency above $10,000 | Currency transaction report | Filed by the bank; the customer files nothing |
| Bank, at its own judgment | Suspicious activity report | Within 30 calendar days of detection; confidential |
| Business receiving cash above $10,000 | Form 8300 | Within 15 days of the cash transaction |
| Seller with foreign accounts | FBAR, and Form 8938 with the return | April 15, with the FBAR extended automatically to October 15 |
The mid-February and end-of-March dates come from the IRS's general instructions for information returns, which move them when they fall on a weekend or holiday. Only the first, second and last rows are the seller's own filings; the others are made by someone else about a transaction the seller is part of.
What does the bank report when the dollars arrive?
A bank that receives the dollar leg of a large OTC sale by wire has no automatic federal report to file because of the amount alone, but it monitors the movement and may file a suspicious activity report if it cannot explain it. FinCEN's pamphlet on currency transaction reporting describes the automatic report, the currency transaction report, as covering transactions in currency, meaning cash or coin, of more than $10,000 conducted by or on behalf of one person, including several currency transactions that add up to more than $10,000 in one day.
A wire transfer is not currency. A seller who receives $2,994,000 by wire has not made a currency transaction, and no currency transaction report results from it. FinCEN also states plainly that large currency transactions are not illegal: the report is a routine filing, for which the bank asks for identification.
The second report is different in kind. Under the federal rule on suspicious activity reports by banks, a bank files when a transaction of at least $5,000 leads it to know, suspect or have reason to suspect that the funds come from illegal activity, that the transaction is designed to evade reporting requirements, or that it has no business or apparent lawful purpose or is not the sort in which the particular customer would normally be expected to engage, and the bank knows of no reasonable explanation after examining the facts. The bank has 30 calendar days from detection, and it may not disclose the report or its existence to the person concerned. The decision is the bank's.
A seven-figure credit from a digital asset business is unlike most accounts' usual activity, so the bank's compliance team may ask what it is. They are doing a job the law gives them. The useful response is the true one, with documents: where the assets came from, the trade confirmation, the identity of the paying desk. Telling the relationship manager before the trade lets the question be answered before the wire lands.
A large sale divided into smaller ones for commercial reasons, such as limiting market impact, is a normal execution choice and is documented as such. Dividing transfers in order to defeat a report is the conduct the law punishes.
Does Form 8300 apply, and do digital assets count as cash?
Form 8300 applies to a person in a trade or business who receives more than $10,000 in cash in one transaction or in related transactions, and under the IRS's current transitional guidance digital assets are not counted as cash for that purpose. The IRS says the form is due within 15 days after the cash transaction, and that the business gives a written statement to each person named on it by January 31 of the following year.
Two definitions keep this form at the edge of most OTC trades. The IRS's reference guide for Form 8300 defines cash as the coins and currency of the United States or a foreign country, extended in some cases to cashier's checks, bank drafts, traveler's checks and money orders with a face value of $10,000 or less, and it says in terms that a wire transfer does not constitute cash for Form 8300 purposes. A desk paid by wire, or a seller paid by wire, is outside the form.
Digital assets are the open point. Congress amended the underlying statute to bring digital assets within the definition of cash, and the IRS responded with Announcement 2024-4: until the Treasury Department and the IRS publish regulations implementing that change, persons are not required to include digital assets when determining whether cash received exceeds $10,000. Ordinary cash still counts and is still reported. That announcement is the position verified for this article; because it is transitional by its own terms, a business that receives digital assets as payment should confirm with its tax adviser, for the year concerned, whether implementing regulations have since been published.
Do foreign accounts add an FBAR or a Form 8938 filing?
A seller with accounts outside the United States may have two further filings, and neither is specific to digital assets. According to the IRS's comparison of the two regimes, the Report of Foreign Bank and Financial Accounts (FBAR, FinCEN Form 114) is filed electronically with FinCEN when the aggregate value of foreign financial accounts exceeds $10,000 at any time in the calendar year, and Form 8938 is attached to the income tax return when specified foreign financial assets exceed thresholds that start, for an unmarried person living in the United States, at $50,000 on the last day of the tax year or $75,000 at any time during it.
Whether a foreign account that holds digital assets is itself reportable must be checked for the year concerned. In Notice 2020-2, FinCEN stated that a foreign account holding only virtual currency was not reportable on the FBAR, that an account also holding other reportable assets was, and that it intended to propose amending the regulations to include virtual currency. For Form 8938, the IRS page verified for this article does not address digital assets at all.
The link with an OTC sale is the dollar leg: if the proceeds are paid into a bank account abroad, that account is an ordinary foreign financial account from the day the money arrives, whatever the status of the wallet the assets came from.
When is the tax paid after a large gain?
The tax on a large gain is generally paid during the year through estimated tax payments, not only with the return the following April. The IRS states that individuals generally must make estimated payments if they expect to owe $1,000 or more when the return is filed, and that the year is divided into four payment periods: income of January through March is paid by April 15, April and May by June 15, June through August by September 15, and September through December by January 15 of the following year.
The IRS also describes when no underpayment penalty applies: broadly, when withholding and estimated payments reach the smaller of 90% of the current year's tax or 100% of the tax shown on the prior year's return. The 2026 Form 1040-ES raises the second figure to 110% for a taxpayer whose prior-year adjusted gross income was more than $150,000, or $75,000 if married filing separately.
Take a worked example with illustrative figures: a seller whose prior-year tax was $90,000, whose withholding in the sale year is $92,000, and whose adviser estimates a total tax of $600,000 for the sale year including the gain. The seller's prior-year income was above the $150,000 mark.
| Measure | Calculation | Amount |
|---|---|---|
| 90% of the current year's tax | 90% × $600,000 | $540,000 |
| 110% of the prior year's tax | 110% × $90,000 | $99,000 |
| Required annual payment | The smaller of the two | $99,000 |
| Additional payment needed beyond withholding | $99,000 − $92,000 | $7,000 |
| Balance still due with the return | $600,000 − $99,000 | $501,000 |
Meeting the prior-year test with $7,000 more protects against the penalty; it leaves $501,000 to pay with the return, an amount to set aside from the wire. The $600,000 is an assumption of the example, not a rate: the real figure comes from the computation of the gain.
How the required amount is spread across the four dates is also a calculation. Under the regular method each date expects $24,750 of the $99,000. The IRS notes that a taxpayer whose income arrives unevenly may be able to reduce a penalty by annualizing income and making unequal payments, using Form 2210; which method suits a sale late in the year is a question for the adviser.
What does the calendar look like for a $3,000,000 sale?
For a $3,000,000 sale agreed on August 20, the reporting calendar runs from the trade date to the following April, with one tax payment date only 26 days after the trade. The example is illustrative: an individual who files on a calendar year sells 50 units of a digital asset to a US desk at $60,000 a unit, $3,000,000 gross. The desk charges 0.20%, or $6,000, and wires $2,994,000. The units were bought in one lot four years earlier for $800,000 and were moved from the seller's own storage to the desk for the trade. The gain is $2,994,000 less $800,000, or $2,194,000, long-term.
| When | What happens | Who acts |
|---|---|---|
| Before Day 0 | Basis records assembled; desk asked whether it issues a Form 1099-DA; bank told a large wire is expected | Seller |
| Day 0, August 20 | Trade agreed and confirmed in writing; the two legs are delivered under the agreed settlement terms | Seller and desk |
| From Day 1 | Bank reviews the incoming $2,994,000 and may ask for supporting documents | Bank, then seller |
| Day 26, September 15 | Estimated tax payment for the period June through August | Seller |
| Day 148, January 15 | Estimated tax payment for the last period of the year, if any is still planned | Seller |
| Day 179, mid-February | Form 1099-DA furnished if the desk is a reporting broker; basis probably blank, as the units were transferred in | Desk |
| The following April 15 | Return filed: digital asset question "Yes", Form 8949 under Box K (or Box L if no form came), Schedule D, balance of tax paid | Seller |
Day numbers count calendar days from the trade date. The question to the desk comes before the trade, because the answer decides which box the seller ticks months later. The bank's review can fall in the same weeks as the first tax payment, so the funds needed on Day 26 should not depend on a review being finished. And the Form 8949 will carry a basis of $800,000 that no third party has reported, which makes the seller's own records the only support for a gain of $2,194,000 instead of $2,994,000.
An extension of time to file the return, where one is requested, moves the filing date and not the payment date.
Which file should be assembled before the sale?
The file to assemble before a large OTC sale is the set of documents that lets every later form be completed from evidence and lets the bank's questions be answered the same day. The IRS's guidance says a taxpayer must keep records sufficient to establish the positions taken on the return, including records documenting receipts, sales, exchanges and other dispositions.
- Acquisition records for every lotDate, number of units, amount paid and fees for each purchase, with the statement or onchain record that shows it. These support the date acquired and cost basis columns of Form 8949.
- The chain of custodyTransfers between your own wallets and accounts from acquisition to sale, so that the units sold can be tied to the lots claimed and a transfer is not mistaken for a disposal.
- The counterparty's reporting statusA written answer from the desk or broker: whether it will issue a Form 1099-DA, for which tax year, in which name and taxpayer number. For a private counterparty, a note that no form is expected.
- The trade documentsThe signed confirmation or term sheet with trade date and time, units, price, gross amount, and any fee stated separately. In the worked example: 50 units, $60,000, $3,000,000 gross, $6,000 fee.
- Proof of both legsThe transaction identifier of the asset transfer and the bank advice for the incoming wire, $2,994,000 in the example, showing the paying party.
- A source-of-funds summary for the bankOne page that links items 1 to 5: how the position was acquired, who bought it, and what amount will arrive from which account.
- The tax payment planThe adviser's estimate of the year's tax, the estimated payment dates that follow the trade, and the amount to set aside from the proceeds until the return is filed.
Settlement itself, meaning who delivers first and how each side is protected while the two legs cross, has its own controls. For reporting, what counts is that each leg leaves a record that names the parties and the amount, and that those records agree with the confirmation.
What do state taxes and entity sellers change?
State income taxes and the legal form of the seller change the forms used and the amount due, not the principle that the seller reports the disposal. Most US states levy their own income tax, with their own rates, returns, estimated payment rules and treatment of capital gains, and some levy none; the rules vary from one state to the next and are not covered here. A seller who moved between states during the holding period, or who is resident in one state and banks in another, should raise that point with an adviser before the trade.
An entity seller meets the same federal question on a different return. A partnership or S corporation reports the sale on its own return and passes the result to its owners; a corporation pays its own tax, and the IRS sets the estimated tax threshold for corporations at $500 of expected tax. The Form 1099-DA exceptions described earlier mean that an entity may be the party least likely to receive a broker's form and so the most dependent on its own books.
Across all of these cases one rule does not move: the disposal is the seller's to report, in full, on the return for the year in which it happened, and every transitional point named above is confirmed for that year before the return is signed.
