Spain’s Anti-Fraud Law, officially known as Law 11/2021 on measures to prevent and combat tax fraud aims to:
- Prevent and combat tax fraud
- Reduce the shadow economy
- Improve tax control
- Ensure fiscal transparency
Changes to Cash Payments
The law introduces new limits on cash payments:
- For transactions with businesses or professionals, the limit is reduced from €2,500 to €1,000.
- For individuals with a tax residence outside Spain, the limit decreases from €15,000 to €10,000.
Billing Software Requirements
One of the most significant aspects of the law is the regulation of billing software:
- Businesses must use approved billing programs that ensure the integrity, preservation, accessibility, readability, traceability, and immutability of records.
- The use of dual-use software or double accounting that allows income concealment is prohibited.

Requirements for Billing Software
Billing programs must meet the following criteria:
- Correctly identify the issuer of the invoice
- Assign a unique number to each invoice
- Include the date of issuance
- Specify the type of invoice (full or simplified)
- Show the total amount
- Detail the applicable VAT regime
Implementation Deadlines
- The law will come into effect on July 1, 2025, for self-employed individuals and businesses with an annual turnover below €6 million.
- Businesses exceeding this turnover must already comply with the regulations since 2017.
Penalties
Non-compliance with the Anti-Fraud Law can lead to significant penalties:
- A fine of 25% of the amount for accepting cash payments exceeding the established limit.
- A penalty of €50,000 for using or possessing non-approved or dual accounting software.
- Possible revocation of the Tax Identification Number (NIF) for failing to comply with regulations.
Recommendations for Businesses and Self-Employed Individuals
- Adopt an approved billing software before the effective date.
- Ensure that the software complies with all requirements set by the law.
- Avoid using spreadsheets or manual methods for accounting and invoicing.
- Stay informed about updates and changes in legislation.
The Anti-Fraud Law represents a significant shift in how businesses and self-employed individuals manage their invoicing and accounting. Adapting to these new requirements is crucial to avoid penalties and contribute to the fight against tax fraud in Spain.

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