Brazil Publishes Phased Schedule Requiring CBS and IBS Fields on Electronic Invoices

Overview

• A joint act from Receita Federal and CGIBS published July 31 sets mandatory CBS and IBS fields for core e‑documents starting Monday, Aug. 3, with other document types phased in through October–December 2026 and Simples taxpayers due on January 1, 2027.
• The tax authority has suspended validation rules that would reject invoices lacking the new fields and announced a compliance program that defers fines during the 2026 test phase.
• Companies must update ERPs, billing and reporting layouts, product and service classifications, and contract clauses to handle dual apuração of old and new levies and to preserve credit entitlements.
• Surveys and industry reports show many small and medium firms are not ready — a Serasa Experian poll found 42% of PMEs cannot assess the reform's impact — while banks and advisers are expanding systems work and advisory support.
• The change begins operational work now but will take years to complete: the IBS will replace ICMS and ISS gradually through 2029–2032 and the new model is expected to be fully in force by 2033, creating both short‑term liquidity risks and long‑term competitive advantages for early adopters.