NACE Code and VAT Mismatch: Can Your Invoices Be Rejected?

With the regulation that came into force as of April 1, if there is a mismatch between the NACE code and the VAT rate shown on the invoice, the system will be able to reject invoices automatically.

This development means a critical risk, especially for businesses that use e-invoice.

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What Is the NACE Code and Why Does It Matter?

The NACE code is the code that officially defines your business's field of activity. In the tax system, your type of activity is assessed through this code.

If the VAT rate on the invoice you issue is not compatible with your registered activity code, the system may treat this as a technical error.

This can lead to the following consequences:

• The invoice being rejected by the recipient's system
• Disruption of operational processes
• Collection delays
• Irregularities in accounting records

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Why Does the Mismatch Occur?

The mismatch generally arises in the following situations:

• If the business's field of activity has expanded but the NACE code has not been updated
• If products or services subject to different VAT rates are sold
• If an incorrect rate has been defined in the ERP or e-invoice system

This risk is higher, especially in businesses with multiple fields of activity.

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What Should You Do?

The following steps are recommended to eliminate these risks:

• Check your NACE codes in the GIB (Revenue Administration) system
• Add any missing NACE codes that match your activities
• Review the VAT definitions in your ERP and e-invoice system
• Make sure your integrator system operates in line with current legislation

Businesses that use the Mikro infrastructure can manage process compliance in a more controlled way through Mikro Software Solutions.

In addition, Technical Support and Consulting Services for system compliance and technical configuration can minimize the risk of invoice rejection.

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The Importance of Software in NACE - VAT Compliance

Manual control methods may not be sufficient for changes like these. Automatic control mechanisms become critical, especially for companies that issue a high volume of invoices.

Business-specific control and validation scenarios can be integrated into the ERP infrastructure through the custom software development approach.

This way:

• The system gives a warning when an incorrect VAT rate is entered
• NACE mismatches are detected in advance
• The invoicing process is secured

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Conclusion: Not a Technical Error, a Strategic Risk

A mismatch between the NACE code and the VAT rate is not merely a technical error. It can directly affect your cash flow and operational continuity.

For this reason, it is critically important to keep your activity codes up to date, configure your software systems in line with legislation, and establish regular control mechanisms.

It is possible to eliminate these risks with the right digital infrastructure.