Taxation of Software and SaaS in Brazil: ISS, Cross-Border Payments and the Reform
Short answer. In Brazil, software is now taxed as a service — the Supreme Court (STF) settled the long ICMS-vs-ISS dispute in 2021, holding that licensing and use of software fall under ISS (municipal service tax), not ICMS. For cross-border software and SaaS payments, expect withholding (IRRF) plus CIDE. And the reform folds ISS into the new IBS/CBS — with ISS phasing down from 2029 and fully replaced by 2033 (2026 is a reporting-only transition year). And if you supply SaaS into Brazil from abroad, the reform now brings you into the CBS/IBS collection chain — see CBS/IBS for foreign digital suppliers.
Software is a service (ISS), not goods (ICMS)
For years, states (ICMS) and municipalities (ISS) both tried to tax software. In 2021 the STF, judging ADI 1945 and ADI 5659, ruled that licensing or the assignment of the right to use software — standardized or customized — is a service subject to ISS, excluding ICMS, with effects from 3 March 2021. This ended the double-tax exposure on domestic software transactions. [Source: STF — ADI 1945 and ADI 5659; LC 116/2003 (ISS) — Planalto]
Cross-border software and SaaS payments
When a Brazilian company pays a foreign software/SaaS provider, the cross-border layer typically applies:
- IRRF (withholding income tax) — generally 15% on royalties/licensing (25% to a low-tax jurisdiction). [Source: RIR/2018 — Decreto 9.580/2018 — Planalto]
- CIDE — generally 10% on royalties and technical/technology payments, depending on the contract’s nature. [Source: Lei 10.168/2000 — Planalto]
- Plus, for services, PIS/COFINS-Importação and municipal ISS-Importação may apply depending on classification.
The exact combination depends on how the payment is characterized (license, service, technical assistance) — a classification that should be analysed per contract.
What the 2026 reform changes
The IBS/CBS reform replaces ISS (and PIS/Cofins) with the dual VAT. Software and SaaS, as services, move into the IBS/CBS base during the 2026–2033 transition — bringing broad, non-cumulative credits but also a new compliance model. [Source: LC 214/2025 — Planalto]
Practical takeaway
For domestic supply, treat software as an ISS service (post-STF). For cross-border SaaS/licensing, model the IRRF + CIDE stack (and possible PIS/COFINS-Importação/ISS-Importação), characterizing each contract carefully. Then overlay the IBS/CBS transition, which reshapes indirect taxation of services from 2026.
FAQ
Is software taxed by ICMS or ISS in Brazil? ISS — the STF ruled in 2021 (ADI 1945/5659) that software licensing/use is a service subject to ISS, not ICMS.
What taxes apply to paying a foreign SaaS provider? Typically IRRF (~15%) plus CIDE (~10%), and possibly PIS/COFINS-Importação and ISS-Importação, depending on classification.
Does the 2026 reform change software taxation? Yes — ISS is replaced by IBS/CBS, so software/SaaS moves into the dual VAT during the 2026–2033 transition.
📚 Part of our pillar guide: Corporate Tax in Brazil — The Complete Guide for Foreign Companies.
Sources
Official sources reviewed for this brief: the Supreme Court’s software ruling (STF — ADI 1945 and ADI 5659), the ISS national law (Lei Complementar 116/2003), the income-tax regulation and CIDE law for cross-border payments (Decreto 9.580/2018; Lei 10.168/2000), and the tax-reform general law (Lei Complementar 214/2025).