Few things feel worse than opening a wallet and finding it empty. Maybe a hacker drained it, a too-good-to-be-true investment turned out to be a scam, an exchange collapsed, or you simply cannot remember the password to a hardware wallet you set up years ago. Once the shock wears off, a practical question usually follows: can I at least deduct this on my taxes?

The honest answer is that it depends heavily on how the Bitcoin was lost. Some situations may qualify for a deduction, many do not, and a few sit in a gray area. This guide walks through the basics in plain language.

Why the type of loss matters

For federal tax purposes, Bitcoin is treated as property. When you sell property for less than you paid, you generally have a capital loss, which is the cleanest and most familiar way to deduct a drop in value. (We cover that in Bitcoin Losses: How Capital Loss Deductions Work.)

Coins that are stolen, lost, or stuck in a failed platform were never sold, though. Instead of a sale, the tax rules look at whether you had a theft loss, a casualty loss, or some other kind of loss, and each one has its own limits. That is why two people who both lost $20,000 of Bitcoin can end up with very different tax results.

Personal theft and casualty losses are tightly limited

Since 2018, federal law has sharply restricted deductions for personal casualty and theft losses. In general, those losses are only deductible when they are tied to a federally declared disaster, and that limitation has since been extended rather than allowed to expire. A hacked wallet or a stolen phone is rarely connected to a declared disaster, so many ordinary personal thefts simply do not produce a deduction.

That sounds discouraging, but it is not the end of the analysis. The key question becomes whether the Bitcoin was held for personal reasons or as part of a transaction you entered into to make a profit.

Scams and the profit-motive question

Losses from a transaction entered into for profit are treated differently from purely personal losses. If you sent Bitcoin into what you believed was a legitimate investment and it turned out to be a fraud, you may have a theft loss connected to a profit-seeking transaction, which is not subject to the same disaster-only restriction.

In 2025, the IRS Office of Chief Counsel released advice walking through several common scam scenarios. In some of them, victims who transferred funds hoping to earn a return were viewed as potentially able to claim a theft loss. In others, where the victim was not trying to make an investment, the loss was treated as personal and not deductible. The details of each situation mattered a great deal.

Chief Counsel advice is not binding precedent, and every case turns on its facts. Still, the takeaway is useful: if you lost Bitcoin to an investment-style scam, it is worth reviewing with a CPA rather than assuming nothing can be done.

When an exchange or lender fails

If your Bitcoin was held on a platform that froze withdrawals or filed for bankruptcy, the tax picture can be complicated. Depending on the facts, the loss might be treated as a theft (if fraud was involved), as a loss on a claim that became worthless, or as something you can only deduct later.

Timing is often the hardest part. A theft loss is generally taken in the year you discover it, but not while you still have a reasonable prospect of getting money back. If a bankruptcy case is ongoing and creditors may receive a distribution, you may need to wait until the amount you will recover is reasonably clear. Keep every notice, claim form, and distribution record from the case.

Lost keys and forgotten passwords

This is the gray area. If you lose access to a wallet because a seed phrase was misplaced or a password was forgotten, the coins still exist on the blockchain; you just cannot reach them. There is no clear, specific IRS guidance saying that this situation creates a deductible loss.

Casualty losses traditionally involve a sudden, unexpected event, and simply forgetting a password is hard to fit into that box. Some practitioners have discussed other theories, but none is a sure thing. If you are in this situation, document what happened and talk with an advisor before claiming anything.

Records that help in any of these cases

Whatever caused the loss, good documentation is what makes a deduction defensible. Useful records include:

• Proof of what you owned. Purchase records, exchange statements, and your cost basis for the coins that were lost.
• Transaction details. Wallet addresses, transaction IDs (hashes), dates, and amounts showing where the coins went.
• Reports you filed. Police reports, complaints to the FBI’s Internet Crime Complaint Center (IC3), and correspondence with the exchange or platform.
• Evidence of intent. For scam losses, messages, websites, or contracts showing you expected an investment return.
• Recovery efforts. Bankruptcy claims, insurance claims, or any partial repayments you received.

If you have not been keeping organized records, our guide to Bitcoin tax records worth keeping is a good starting point.

Watch out for recovery scams

One last warning: people who have just lost crypto are frequent targets for a second scam. Messages promising to recover stolen Bitcoin for an upfront fee are a common trick. Legitimate law enforcement and bankruptcy trustees do not ask you to pay in crypto to get your money back.

Key takeaways

A Bitcoin loss is not automatically deductible. Ordinary personal theft is usually not deductible under current law, while losses from investment-style scams and failed platforms may qualify depending on the facts and timing. Lost passwords remain uncertain territory. In every case, careful records and a conversation with a qualified CPA are your best tools.

This article is general information only and is not tax, legal, or investment advice. Tax rules for theft, casualty, and other losses are complex, can change, and depend on your specific facts. Consult a qualified CPA or tax attorney about your situation before claiming a loss on your return.