Find your CAE activity code
Describe what you do — we match it against the complete CAE Rev.4 classification in force since 1 January 2025 and rank the closest results.
From a suggestion to a code: what to do next
Results are AI-assisted candidates, not confirmation from AT or INE. The first result does not guarantee your tax classification, a VAT exemption or an IRS coefficient.
- Describe the specific service, your customers and what you will invoice for. ‘Private maths tutoring’ is more useful than ‘education’.
- Compare candidates with INE's CAE Rev.4 explanatory notes, including exclusions. For a personal profession, also check the article 151 table; no match in our tool does not prove that no CIRS code exists.
- Check your current registration in Posição Integrada on Portal das Finanças. To add an individual's activity, use an amendment declaration; this search does not register or change anything.
CAE or CIRS? Teaching examples and code 1519 · Prepare your activity declaration
Guidance checked : INE official lookup · AT CAE/CIRS FAQ.
Frequently asked questions
What is a CAE code?
CAE stands for Classificação Portuguesa de Atividades Económicas — the official classification of what you actually invoice for. You pick one when you open atividade, and it stays attached to your activity at the Autoridade Tributária.
Why does picking the right code matter so much?
The code must describe the activity you actually carry on. It affects how the activity is classified across public systems and can matter for regulatory and tax treatment, but it is not a menu for choosing the lowest tax coefficient. If two results look plausible, check their official designations and confirm the activity with the AT or SICAE before filing.
Should I use a CAE code or an article 151.º CIRS code?
For an individual, article 151 allows classification by CAE or the professional-activity table. Choose by the actual work; registering a CAE does not avoid the IRS coefficient for a specifically listed profession. A company can only have CAE codes. The linked guide explains teaching codes, 1519 and the official lookup.
Is the suggestion here official?
No. The candidate codes come from the official CAE Rev.4 list in the annex to Decreto-Lei 9/2025, but the ranking of your description is an AI-assisted suggestion, not a ruling. Confirm the code in SICAE or with the AT before putting it on a form.
Does this still use CAE Rev.3?
No. Decreto-Lei 9/2025 established CAE Rev.4, revoked the decree behind Rev.3 and produced effects from 1 January 2025. This finder uses the complete 915-subclass Rev.4 annex, rechecked against the Diário da República on 31 August 2026.
Can I change my code later?
An individual can add or change an activity through a declaração de alterações on Portal das Finanças, under ATividade → Submeter declarações. Companies may first need an IRN change if the activity is outside their corporate object. Check the deadline for the particular change, submit the correct declaration and verify the resulting registered details; this finder makes no changes for you.