How do I convert an IAE heading to CNAE?

Use the official correspondence table published by INE. In NACEBridge you enter the heading and we return the equivalent CNAE in 4 and 5 digits.

What if my IAE heading matches several CNAE codes?

Some headings map to more than one CNAE. Pick the one that best describes your real main activity; for tax questions consult your advisor.

IAE → CNAE

IAE ↔ CNAE converter

Convert a Spanish IAE heading to the matching CNAE code — or the other way around — using the official mapping published by the tax administration.

IAE → CNAE

Open the IAE → CNAE converter →Decode a single code →

IAE (Impuesto sobre Actividades Económicas) uses its own list of headings; CNAE is the European statistical classification. Both describe economic activities, but they are not identical.

This converter gives you the most common mapping between each IAE heading and the CNAE 2025 code. Data comes from the official AEAT and INE tables.

If your main activity changes, always review both codes: Social Security and the tax office use different systems.

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FAQ

Are IAE and CNAE the same?: No. IAE is a local tax with its own headings; CNAE is the European statistical classification. An official mapping table links the two.
How do I convert an IAE heading to CNAE?: Use the official correspondence table published by INE. In NACEBridge you enter the heading and we return the equivalent CNAE in 4 and 5 digits.
What if my IAE heading matches several CNAE codes?: Some headings map to more than one CNAE. Pick the one that best describes your real main activity; for tax questions consult your advisor.

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