CIRS 1313
Analistas de Sistemas (CIRS Art. 151) · Systems Analysts (CIRS Art. 151)
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The CIRS Art. 151 activity code for systems analysts working as individual freelancers in Portugal. Carries the 0.75 simplified-regime coefficient, identical to CIRS 1332 (programmers) and other listed professions.
CIRS 1313 is the Art. 151 activity code for "analistas de sistemas" (systems analysts), covering individual independent professionals in Portugal whose primary activity is systems analysis.
How it relates to CIRS 1332
The two codes that cause the most confusion in tech-adjacent freelancing are 1313 (systems analysts) and 1332 (programmers). Both appear in the Art. 151 CIRS table. Both carry the 0.75 simplified-regime coefficient. Both have the same withholding treatment. For most practical purposes, the mechanics are identical.
The distinction is in the nature of the work:
- CIRS 1332 (Programadores informáticos): primary activity is writing and implementing code
- CIRS 1313 (Analistas de sistemas): primary activity is analyzing systems, defining requirements, designing architecture, specifying solutions
In practice, many technical professionals do both. You register under the code that most accurately describes your primary activity. If you are primarily a developer who occasionally does architecture work, 1332 is your code. If you are primarily a solution architect or systems designer who also writes some code, 1313 may be more accurate.
The AT looks at what you actually do, not just what code you registered under. When in doubt, the distinction is low-stakes for tax purposes since both codes carry identical coefficients.
The same expat layer applies
For systems analysts with foreign clients, the same cross-border obligations apply as to programmers under 1332:
- AT-certified invoicing software is required (Portaria 363/2010)
- EU B2B invoices: 0% VAT, Declaração Recapitulativa from first invoice
- Foreign SaaS costs (Stripe, AWS, etc.): reverse-charge VAT obligation from day one
- Portuguese clients withhold 23%; foreign clients do not
See the CIRS 1332 guide for the full expat mechanics. Everything in that post applies equally to CIRS 1313 holders.
Cross-references
Frequently asked questions
What is CIRS 1313?
CIRS 1313 is the 'analistas de sistemas' (systems analysts) entry in the Art. 151 CIRS professional activity code table. It applies to individual freelancers whose primary activity is systems analysis. It carries the 0.75 coefficient: 75% of gross revenue is taxable under the simplified regime. This is the same coefficient as CIRS 1332 (programmers) and most other named Art. 151 professions.
What is the difference between CIRS 1313 and CIRS 1332?
Both are Art. 151 CIRS codes carrying the same 0.75 coefficient. CIRS 1332 is 'programadores informáticos' (programmers) and CIRS 1313 is 'analistas de sistemas' (systems analysts). The distinction is about the primary nature of your work: someone who primarily designs and specifies systems (analysis, architecture, requirements, documentation) registers under 1313; someone who primarily writes and implements code registers under 1332. In practice, many technical professionals do both. You register under the code that best describes your primary activity.
Does CIRS 1313 have the same tax treatment as CIRS 1332?
Yes. Both codes carry the 0.75 simplified-regime coefficient, the same withholding rate (23% from Portuguese clients under OE2025), and the same cross-border VAT obligations for expat freelancers with foreign clients. The codes differ in the label they attach to your activity, not in the tax mechanics.
Is CIRS 1313 the same as CAE 1313?
No. CIRS Art. 151 codes and CAE codes are two entirely separate systems. CIRS codes are maintained by AT (Autoridade Tributária) and apply to individual freelancers. CAE codes are maintained by INE and apply to companies and entities. The same number in both systems refers to entirely different classifications.
Related terms
Portugal's simplified tax regime for solo entrepreneurs and small businesses, where taxable income is calculated using fixed coefficients applied to gross revenue.
Trabalhador IndependenteSelf-Employed WorkerThe Portuguese term for an independent worker or sole entrepreneur, the equivalent of a freelancer or sole trader in other countries.
Abertura de AtividadeOpening ActivityThe process of registering as a self-employed worker (trabalhador independente) with the Portuguese tax authority, officially starting your freelance activity.
CAEClassificação Portuguesa de Atividades Económicas · Economic Activity CodeThe Portuguese economic activity classification code. Assigned when you open your business activity. Determines your tax category, applicable coefficients, and which obligations apply.