Crypto Exchange Bankruptcy: Tax Treatment for Customers

When a crypto exchange bankruptcy wipes out your holdings, the IRS allows you to claim a deduction—but not necessarily in the year the exchange collapses. A theft loss requires proof that theft actually occurred; a capital loss may be easier to substantiate. This article explains which path applies, how to value your loss, and when you can claim it on your tax return.

Theft loss vs. capital loss

The choice between claiming a theft loss and a capital loss shapes both the deduction process and the year in which you can claim it.

A theft loss under Internal Revenue Code Section 165(c)(3) allows you to deduct the decline in value of property due to theft, casualty, or sudden loss. The key requirement is proof that theft actually occurred—not merely that the exchange went insolvent, mismanaged funds, or collapsed. For example, if the exchange operator knowingly stole customer coins and fled (as in some fraud cases), you may have a theft loss. If the exchange was hacked and coins were stolen by a third party, that may also qualify as a theft loss if the exchange’s negligence or security failure constituted the underlying event.

However, many exchange collapses involve mismanagement, poor custody, or undercapitalization—not provable theft. In these cases, claiming a theft loss becomes difficult because the burden is on you to show that someone deliberately stole the funds with criminal intent. The IRS and courts have generally been skeptical of theft loss claims based solely on exchange insolvency.

A capital loss is simpler to establish. When the coins become worthless or are permanently lost due to the exchange’s failure, you can treat the loss as a sale of the asset at zero (or the salvage value recovered in bankruptcy). The loss equals the fair market value of the coins on the date you know they are gone, minus your cost basis.

Most taxpayers and advisors recommend the capital loss approach for exchange bankruptcies because it requires less proof of criminal intent and aligns with the economic reality: you bought coins at one price, they became worthless or unredeemable, and you have a realized loss.

When the loss is “identifiable”

The IRS does not allow you to claim a loss in the year of the exchange collapse if the loss is still speculative or if recovery appears possible. The loss must be identifiable—meaning there is a clear, objective indication that the coins are gone and will not be recovered.

For example:

• FTX collapse (November 2022): Many customers did not claim a loss in 2022 because bankruptcy proceedings were ongoing and recovery through the trustee was uncertain. As of 2023 and 2024, when distributions began and the likelihood of full recovery became clear, customers could identify their loss and claim it.
• Exchange liquidation: If the exchange announces a specific date by which all accounts will be frozen and liquidated, that date typically marks the loss realization.
• Wallet seizure: If a hacked exchange’s wallet is permanently lost or seized by law enforcement, the date of the seizure is usually the loss date.

The year you claim the deduction depends on when you can prove with reasonable certainty that the coins are gone. This is why many exchange bankruptcy losses are claimed one to three years after the collapse, once bankruptcy proceedings clarify the outcome and the trustee’s recovery plan is finalized.

Work with a tax professional to determine the right year for your loss. Claiming the loss too early (before recovery is truly impossible) may result in the IRS disallowing it and requiring you to amend your return. Claiming it too late (years after the loss is clearly identifiable) may trigger penalties or other complications.

Valuation at the loss date

To calculate your capital loss, you must determine the fair market value of your coins on the date the loss is identifiable. This is not the price you paid when you bought them; it is the market price of the same coin on the day the exchange failed or the coins became unredeemable.

For example, if you bought 1 Bitcoin for $30,000 in 2020, held it on the exchange at the time of collapse, and Bitcoin was trading at $40,000 on the loss date, your loss is based on $40,000 of value, not your $30,000 cost. Your capital loss is then $40,000 minus your $30,000 basis, yielding a $10,000 gain—not a loss. (This scenario is rare in major exchange collapses where prices have often fallen, but it illustrates how valuation on the loss date matters.)

Use the spot price from reputable sources—CoinGecko, CoinMarketCap, or the exchange’s last reported price—to establish the fair market value on the loss date. Document this carefully; the IRS may question whether you have used a reasonable valuation.

If the coins were partially recovered through the bankruptcy process (a common outcome), you may have a smaller loss. For example, if you recover 40% of your coins’ value through a trustee distribution, your deductible loss is 60% of the fair market value on the loss date.

Documentation and proof

To claim a loss, gather and keep:

1. Exchange account statements showing the coins you held and their quantity.
2. Transaction records showing the dates and prices when you acquired the coins (to establish cost basis).
3. News or official announcements marking the date of the exchange failure, hack, or freezing of accounts.
4. Bankruptcy court filings (available online for major cases), which document the loss and any recovery.
5. Fair market value evidence on the loss date—screenshots of price data, exchange reports, or credible crypto data sources.
6. Recovery documents if you received partial compensation from a bankruptcy trustee, including the date and amount of distributions.

Without this documentation, the IRS may deny or reduce your claimed loss. Exchange bankruptcies can be audited years later, especially for high-value losses, so maintain records indefinitely.

Claiming the deduction on your return

A capital loss is reported on Schedule D and Form 8949. If your total capital losses exceed your capital gains for the year, you can offset up to $3,000 of ordinary income. Unused losses carry forward to future years indefinitely and may be used against future gains or up to $3,000 of ordinary income each year.

A theft loss (if you can substantiate it) is claimed as a casualty or theft loss on Schedule A (for itemizers) or under Section 165(c)(3) deductions, though this has become much more restrictive in recent years. The Tax Cuts and Jobs Act of 2017 suspended most personal casualty losses except those tied to federally declared disasters. Crypto theft losses not linked to a declared disaster are generally not deductible for individuals.

This is another reason capital loss treatment is preferable: it is unambiguous and not subject to the casualty loss restrictions.

Example: FTX and subsequent claims

When FTX collapsed in November 2022, customers holding coins on the exchange had no way to access them. The bankruptcy trustee eventually began distributing recovered assets to creditors in 2024. A customer who held 10 Bitcoin worth $200,000 (at November 2022 prices) and never recovered any could claim a $200,000 capital loss (minus their cost basis). If their basis was $100,000, the loss is $100,000. If they recovered $80,000 in a trustee distribution, the deductible loss is reduced to $20,000.

The customer could claim the loss starting in the tax year the loss becomes identifiable (typically the year of the collapse or shortly after, depending on when recovery prospects become clear). They would file an amended return for the applicable year or claim it going forward.

See also