The Tax Authority Tightens Its Grip: What the Mass Crackdown on Freelancers and SMEs Really Means

Spain’s Tax Agency (Agencia Tributaria) has significantly stepped up its audit activity targeting smaller businesses. Industry experts cite millions of annual enforcement actions and tens of thousands of in-person visits to businesses across the country — a trend that makes one thing clear: tax scrutiny of freelancers and small businesses is no longer an occasional risk, but an everyday reality.

This is no coincidence. The Tax Agency has spent years investing in data analytics and automated cross-referencing tools: the Real-Time VAT Reporting System (SII), the mandatory rollout of e-invoicing — which is being fully consolidated throughout 2026 — and the growing use of artificial intelligence to detect irregular patterns have all dramatically expanded the Agency’s ability to flag discrepancies without launching a traditional audit.

What the Tax Agency Checks — and How It Detects Issues

Enforcement activity is concentrated in three main areas: VAT, personal income tax (IRPF) from business activity, and accurate income reporting. For freelancers, one of the most common triggers is the deduction of expenses with no clear link to the professional activity: home utility bills, mixed-use vehicles, meals, or entertainment costs. Any deduction that cannot be substantiated with documentation when challenged creates a real risk of a supplementary assessment, surcharges, and interest.

For SMEs, scrutiny intensifies around the consistency between taxable bases reported in the Corporate Income Tax return and data flowing in from third parties: customers, suppliers, financial institutions, or e-commerce platforms. Automated cross-matching between what a company declares it has invoiced and what its customers declare they have deducted has drastically narrowed the margin for “inadvertent” errors that might once have gone unnoticed.

In-person visits — which affect physical businesses such as hospitality, retail, clinics, and workshops — aim to verify whether the business’s actual activity matches its declared figures: capacity, visible staff, transaction volumes at tills or card terminals. A venue with a queue at the door and an unusually low declared turnover is precisely the profile that the algorithms flag for an on-site inspection.

How to Prepare: Prevention Is the Best Defence

In this environment, a reactive approach — waiting for a notice before putting your records in order — is the most costly strategy. Business owners who have been through inspections consistently find that the difference between a case that closes without consequences and one that ends in penalties usually comes down to the quality of the documentation already in place, not the taxpayer’s good intentions.

A few concrete measures that significantly reduce your risk:

Keep your accounts up to date, every day. A daily ledger with supporting documents for each entry is the most effective shield against any enforcement action.

Get your e-invoicing system operational now. With the Verifactu system advancing through 2026, businesses still managing invoices on paper or in spreadsheets are in an increasingly exposed position.

Ensure consistency across all tax returns. Your VAT returns (Form 303), withholding returns (Form 111), and personal or corporate income tax filings must all reconcile with each other and with your internal accounts. Even minor discrepancies trigger automatic alerts in the Agency’s systems.

Document every deductible expense. Every expense claimed must be backed by a complete invoice, a clear connection to the business activity, and — where there is any doubt — a written explanation that can be provided if challenged.

The Value of a Good Tax Adviser

In an environment where the Tax Agency operates with mass data analytics tools, having a tax adviser who knows the regulations and the Agency’s enforcement criteria in depth is not a luxury — it is a genuine competitive advantage. Proactive support — reviewing the consistency of returns before filing, spotting potential red flags in advance, and keeping documentation organised ahead of time — saves time, money, and the personal stress that any audit process inevitably brings.

At Zythos Business, we support freelancers and SMEs with their day-to-day tax and accounting management, so that if the Tax Agency does come knocking, it is a reason for confidence rather than concern. Because the best inspection is the one that finds nothing to question.