Crypto losses in Spain: offset and reduce taxes
Types of crypto losses:
- Sale/swap losses: Capital loss (price sold < price paid)
- Hack/scam/failed project: Deductible when "definitively produced" (requires evidence)
- DeFi impermanent loss: Capital loss on withdrawal
Offsetting rules:
- Capital losses offset capital gains (same year, any asset class)
- Excess losses offset capital income (dividends, interest) up to 25% of net positive balance
- Remaining balance carried forward 4 years
2-month anti-wash rule: Loss on asset X + purchase of identical asset within 2 months before/after = loss deferred until the repurchased position is sold.
kointax automatically identifies all losses and applies the 2-month rule correctly.


