About TaxDown
TaxDown files the Spanish Renta by brute intelligence: it automatically cross-references a user's financial data against current Spanish tax regulations to surface every applicable deduction and credit, completing most returns in minutes. It's an authorized partner of the Spanish Tax Agency and also operates in Mexico.
Founded in Madrid in 2019, TaxDown serves over 4 million users, says it has managed more than €1.5 billion in taxes, and supplies its technology to 500+ partner companies.
The engine automatically cross-references user financial data against current Spanish tax rules to identify every applicable deduction and credit, positioning itself explicitly as an AI-driven tax platform.
Highlights
- 4 million+ users across Spain and Mexico; €1.5B+ in taxes managed
- Authorized partner of the Spanish Tax Agency
- Backed by Bonsai Partners plus BBVA Spark debt financing
Third-party reviews
Users highlight simplicity and strong refund outcomes, with occasional criticism of upselling to pricier plans.
Read on TrustpilotRatings belong to the cited platforms and change over time — last checked August 2026. TaxAIs does not collect its own reviews; follow the links above for current scores and full review text.
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