Digital Control of Hacienda
The Spanish Tax Agency (Agencia Tributaria — Hacienda) operates with an enormous volume of data and monitors a significant share of the country’s financial flows almost in real time. Systems such as the Immediate Supply of Information (SII) allow the authorities to supervise VAT transactions of large companies, covering approximately 80% of total invoicing. Starting from 2026, banks and payment systems also provide even more detailed information regarding bank accounts, cards, and financial transactions.
How Are Taxpayers Selected for Audits?
The Tax Agency does not act randomly. Each year, the Annual Tax Control Plan is published (approved in February 2025 and officially released in the BOE on March 17), defining priority audit areas, including: crypto assets, VAT evasion schemes, excessive expenses declared by lawyers and self-employed professionals, related-party transactions, transfer pricing, and indicators of high living standards combined with officially low income.
Artificial intelligence and Big Data play a key role, as algorithms automatically detect tax inconsistencies. Social media also falls within the analytical scope. Although inspectors do not manually monitor every post, displaying a luxury lifestyle (yachts, Ferrari cars, luxury travel) while reporting minimal or zero income may trigger a system “risk flag.” In 2025, the Spanish Tax Agency officially strengthened controls in such cases.
Legal Ways to Reduce the Tax Burden
- Holding Structures: These allow profits to be redistributed within a corporate group with reduced taxation (in some cases around 1.25%), instead of distributing dividends directly to individuals taxed at rates between 19% and 28%.
- 15% Corporate Tax Rate for New Companies: Under the Startup Law, companies officially recognized as startups may apply a reduced 15% Corporate Income Tax rate during their first four profitable years, instead of the standard 25%.
- ZEC Regime in the Canary Islands: Companies meeting investment and job-creation requirements may benefit from a 4% Corporate Income Tax rate. This regime is currently valid until the end of 2026, with possible extension.
Important Warning on Tax Residency
Hacienda actively applies the concept of the “center of vital interests.” Even if an individual spends more than 183 days per year outside Spain, they may still be considered a Spanish tax resident retroactively if their family, main assets, or economic interests remain in Spain, potentially leading to additional tax assessments for several previous years.
Conclusion
In 2026, the Spanish Tax Agency is no longer based on traditional paperwork audits but functions as a powerful digital system driven by data analytics and artificial intelligence operating 24/7. The best protection is proper tax planning and full compliance with applicable legislation.
📌 If you require tax advice, tax planning, or tax optimization, feel free to contact us.
