kointax vs Koinly: which is better for crypto taxes in Spain?
If you're looking for the best tool to calculate your crypto taxes in Spain in 2025, you've probably considered Koinly and kointax. Both promise to simplify crypto tax reporting, but there are important differences that can significantly influence your decision.
What is Koinly?
Koinly is an Irish platform founded in 2018. It's one of the most popular internationally, supporting over 170 countries. However, it was not designed specifically for Spain or the AEAT, which creates problems when trying to reconcile your Spanish tax return.
What is kointax?
kointax is a native Spanish platform, built from day one to comply with the requirements of the AEAT, IRPF, Models 172/173 and Model 720. Every calculation follows exactly the instructions of the Spanish Tax Agency.
Feature comparison
| Feature | kointax | Koinly |
|---|---|---|
| Designed for Spain | ✅ Native | ⚠️ Adapted |
| IRPF support (Income Tax Return) | ✅ Complete | ⚠️ Partial |
| Models 172/173 | ✅ Included | ❌ Not available |
| Model 720 | ✅ Included | ❌ Not available |
| Spanish language support | ✅ Native | ⚠️ Translation |
| Spanish FIFO method | ✅ Per AEAT rules | ⚠️ Generic FIFO |
| Base price | From €29/year | From $49/year |
| Spanish exchange integration | ✅ All Spanish | ⚠️ Mainly international |
| Spanish customer support | ✅ Yes | ❌ English only |
The FIFO problem in Koinly for Spanish users
The Spanish AEAT requires applying the strict FIFO method per currency pair, with specific rules about donations, inheritances and staking operations. Koinly applies a generic FIFO that doesn't always match what Spain's Tax Agency requires, which can generate discrepancies in your tax return.
kointax implements exactly the FIFO described in Spanish regulations, including correct treatment of staking as capital income, non-computable losses from repurchase within 2 months, and correct gain calculation in cryptocurrency swaps.
Verdict
If you file taxes in Spain, kointax is the safest option. It was designed by Spanish tax advisors specializing in crypto to comply exactly with what the AEAT requires. Koinly is a great tool for international users, but for Spanish tax returns it can fall short on critical points.
👉 Try kointax for free — no credit card required.