Two kinds of loss — and only one behaves
Every major theft or collapse (the record-setting Bybit hack in early 2025 was the latest to do it) produces the same question in bulk: my coins are gone — can I at least deduct them? The honest answer starts by splitting “loss” into two categories that tax law treats nothing alike:
- 1. Realised capital losses: you deliberately sold, swapped or disposed of a coin below its cost. Most countries have clear, usable rules for these.
- 2. Theft, lost keys, exchange collapse: the coins vanished, but you disposed of nothing. Tax law does not automatically treat this as a disposal — whether anything can ever be claimed varies by country, and the road is uphill everywhere.
Category one is the well-lit room; category two is the basement. We take them in that order.
Category one: realised capital losses, four countries
| Country | Offsets what | Carry-forward | Key point |
|---|---|---|---|
| United Kingdom | Current-year capital gains | Yes | Losses must be claimed to HMRC within the time limit to be usable. |
| Australia | Capital gains only (never salary) | Indefinite | Losses apply before the CGT discount. |
| United States | Capital gains + up to $3,000/yr of ordinary income | Remainder carries | $1,500 if married filing separately. |
| Germany | Same-category private-sale gains only | Yes (same category) | No offsetting against wages or other income types. |
The shared precondition: realisation. A price collapse on coins you still hold produces no usable loss anywhere in these four countries.
Category two: theft, lost keys, collapses
This is where hopes go to be disappointed. The directional map — each line to be confirmed against current official guidance, with an adviser, before anything is claimed:
- United States: since the 2017 tax reform, personal theft and casualty losses have been generally non-deductible outside declared disasters — a limitation 2025 legislation made permanent (state-declared disasters join from 2026). Losses in profit-oriented transactions or investment fraud (Ponzi schemes) may fall under separate rules such as the Rev. Proc. 2009-20 safe harbour — genuinely intricate territory.[1]
- United Kingdom: HMRC’s position is that losing your private key is not, by itself, a disposal — but where an asset has become worth next to nothing, a negligible value claim may treat it as disposed of, crystallising the loss. Theft is knottier still.[2]
- Australia: the ATO accepts that lost or stolen crypto may support a capital loss — where the evidence holds up: proof of ownership, amounts, the date of loss, and that recovery is not possible.[3]
- Germany: whether private-sphere theft losses deduct at all is disputed and generally difficult — a case-by-case professional question.
- Exchange collapses: claims usually stall until the loss becomes definite — and mid-liquidation, with recovery percentages unknown, it is not. Resist the urge to write it off unilaterally.
Why this section refuses to cheer you up
“My coins vanished” is the most contested, least harmonised corner of crypto tax, and the one where social media misinformation runs hottest. A crisp “yes, deduct it” would be more satisfying and less true. For meaningful amounts, one professional consultation is worth more than every thread you will read about it.
Deliberate loss selling — and the rules watching for it
Where realised losses offset gains, some holders sell losing positions before year-end on purpose — tax-loss harvesting. Legitimate in direction, but each country has teeth near it:
- United Kingdom: the same-day and 30-day rules — rebuy the same token within 30 days and the matching rules blunt the loss.
- United States: the wash sale rule currently addresses “securities”, and its application to property-taxed crypto has not been settled — a gap Congress has repeatedly eyed, so treat it as provisional, and economic-substance doctrine still applies.
- Australia: the ATO has warned explicitly about wash sales — selling to manufacture a loss and promptly rebuying can be undone under anti-avoidance provisions.
Evidence decides everything
Every path on this page — realised, stolen, stranded — ends at the same gate: evidence. Disposal dates and prices, the compromised wallet’s address and its on-chain trail, creditor filings from a collapsed platform. Kept as you go, they make claims possible; reconstructed after the fact, they often cannot be. The how is in Keeping transaction records.
FAQ
My coins have halved in value but I still hold them. Can I deduct that?
My exchange collapsed and I cannot withdraw. What now?
Can crypto losses offset my salary?
Official sources
- [1] US: IRS Topic 409 (Capital gains and losses); Pub. 547 (Casualties & thefts) — irs.gov/taxtopics/tc409
- [2] UK: HMRC, Cryptoassets Manual (losses / negligible value) — gov.uk/hmrc-internal-manuals/cryptoassets-manual
- [3] Australia: ATO, Crypto asset investments (lost or stolen crypto) — ato.gov.au/…/crypto-asset-investments
- Germany: BMF letter on cryptoassets (updated 2025); §23 EStG — bundesfinanzministerium.de
Checked against the official pages on 1 September 2026. Theft and collapse positions shift and attract dispute; the authorities’ current publications and professional advice govern.
Do not reach the conclusion alone
“My coins lost value” and “my coins are gone” are different tax events, and whether — and when — the second can be claimed often waits on liquidation outcomes or a claim’s formal worthlessness. This page marks the boundaries; it is not advice for your situation. Theft, collapses, Ponzi schemes and cross-border cases: preserve every document and put them in front of a licensed professional.