In the last week of February, the Brazilian Federal Revenue Service (RFB) published Consultation Solution Cosit No. 21, marking a significant development in the ongoing debate known as the 'Century Thesis.' This case revolves around the calculation method for excluding the ICMS (Tax on Circulation of Goods and Services) from the base of PIS (Program of Social Integration) and Cofins (Social Security Financing Contribution) contributions. The query posed by the consultant asked what the correct amount of ICMS to exclude from the contribution bases should be: whether it should be the ICMS indicated on the invoice or the effective ICMS that impacted the operation based on the gross-up technique. The second method generally offers about a 10% advantage in calculations.

After nearly two years of deliberation regarding this consultation, the RFB has taken a binding position for all tax auditors to exclude the stated ICMS as the method of calculation. The tax administration has clarified that the gross-up calculation technique is merely a method intended to price the sale value of the goods while estimating a net margin that preserves the profitability of the operation. This policy shift could lead to significant implications for businesses, potentially affecting their tax liabilities and compliance strategies.

The decision by the RFB underscores the importance of clear and consistent guidelines in tax regulation, especially in complex taxation scenarios such as this one. Businesses must now adapt their accounting practices in line with the RFB's ruling, which emphasizes the importance of meticulous record-keeping and understanding of tax obligations. The ruling may also stimulate further discourse on the topic and influence future tax policy discussions within Brazil’s legislative framework, indicating an ongoing evolution in the landscape of the Brazilian tax system.