Brazil’s IBS Committee Signals a 27.9% Combined VAT Rate in New Revenue Methodology

• The Goods and Services Tax Management Committee (CGIBS) has published the methodology behind its FY2027 revenue projections, adopting an 18.7% benchmark for the IBS component and an implied 9.2% for the CBS — a combined ~27.9% standard rate. [blog.vazde…lmeida.com]
• The estimate is a technical parameter for budget planning only, not a binding definition of the rates applicable to taxpayers; the 2027 transitional IBS rate stays at 0.1% (0.05% states + 0.05% municipalities). [blog.vazde…lmeida.com]
• Publication has reignited debate on the overall tax burden, prompting companies to reassess financial impact, tax-credit use, contract terms and system readiness. [blog.vazde…lmeida.com]

Extended article

CGIBS Resolution No. 14/2026, published on 31 July 2026, sets out how the committee estimated IBS revenue for fiscal year 2027 in the absence of historical data for the new consumption tax system. The methodology relies on ICMS (state VAT) and ISS (municipal service tax) revenues, adjusted using official macro-economic projections. Adopting an 18.7% IBS benchmark produces a combined IBS+CBS burden of 27.91%, implying a 9.21% CBS rate — the clearest indication to date of expected taxation under the new regime. [blog.vazde…lmeida.com]

The committee stressed that the figure is a projection parameter, not the rate applicable to taxpayers, and confirmed the 2027 transitional IBS rate remains at 0.1%. The publication coincides with the testing phase for IBS/CBS fields in electronic tax documents, which began 3 August 2026 under Joint Act No. 4/2026 without document rejection at this stage. With projections near 28%, businesses are urged to assess pricing, credit recovery, contracts and processes; commentators note that rates at this level could ultimately trigger constitutional challenges on grounds such as ability to pay, prohibition of confiscatory taxation and free enterprise. [blog.vazde…lmeida.com]