Stolen crypto tax loss

What counts as a tax loss for lost or stolen crypto?

If someone steals your crypto, through a hack, scam, or a failed exchange, you might wonder if you can claim that loss and reduce your tax bill. Whether that’s possible depends on where you live, how the loss happened, and what kind of proof you’ve collected.

Here’s the distinction: selling crypto at a lower price than you paid is easy to show, because the sale sets a definite value. Losses like theft, lost access to a wallet, or funds locked during a platform failure are more complicated. You may still be considered the owner, at least on paper, and there’s always a chance you’ll get the crypto back someday. Because of that, most tax authorities ask for strong evidence that the loss is final. For details about offsetting these losses against your gains, see how capital losses offset gains.

And while crypto prices move sharply, and investing in them carries a risk of loss, a tax claim lowers your gain for tax, but doesn’t restore your money.

Evidence and timing: when a crypto loss is recognised

If you're aiming to claim a stolen crypto loss, tax authorities ask for exact records: what assets you had, when you bought them, and how they disappeared. That means keeping exchange account statements, blockchain transaction data (showing coins leaving to an unknown wallet), police paperwork, and any letters from the platform or an insurer. Those documents, together with your main crypto tax records, form the basis for your claim.

Loss timing is set by local law. In some places, you recognize the loss the year you detect it. Elsewhere, it only counts after recovery options are gone, like after a formal insolvency or court confirmation. That wait could stretch a year or even longer, so hang on to your documentation until everything gets resolved.

And one more thing: some tax authorities only allow loss deductions for business activity. If you're holding crypto privately, you could have more restrictions, or none at all. Check the exact rule for your tax status.

How to report a stolen crypto loss on your return

You need to report the loss in the format your tax return uses, usually with the date of discovery, the original cost, and a summary of the evidence you've collected. In some tax systems, losses like fraud or theft have dedicated lines or supplementary forms. Others treat them as disposals, so read the instructions for your own jurisdiction closely.

If the tax office asks for more, a brief written note explaining why you reported the loss a certain way or how you calculated your numbers can help. Save copies of everything you send or submit.

Worked example: a phishing attack and a claimed loss

Let’s say you bought tokens for 10,000 euros. A phishing attack tricks you into moving them out of your wallet. Your exchange records confirm the purchase, and the blockchain shows the transfer out to an address you don't own. You file a police report and, when the platform confirms there’s no recovery, you claim the loss in a later tax year.

Your files should clearly set out the cost basis (here, 10,000 euros). Since there’s no sale, what happens next depends squarely on how tax law in your country treats crypto theft.

Frequently asked questions