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Koinly FIFO vs AEAT FIFO: key differences for Spain

Why Koinly's FIFO can differ from what the Spanish AEAT requires and the impact on your tax return.

Equipo kointax·July 3, 2025·6 min read

Koinly FIFO vs AEAT FIFO: key differences for Spain

Key AEAT FIFO particularities Koinly may miss:

  1. Global FIFO per asset (not per exchange) — all BTC across exchanges forms one FIFO stack
  2. Donations/inheritances — acquisition cost is the declared value for gift/inheritance tax
  3. 2-month repurchase rule — losses are deferred if the same asset is repurchased within 2 months
  4. Staking/airdrop acquisition price — market value at reception

kointax implements all these AEAT-specific FIFO rules exactly.

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