The Central Bank's Monetary Policy Committee (COPOM) raised the SELIC (basic interest rate) by 1.50 percentage points, to 7.75% per year.
This is the biggest increase since December 2002, when the SELIC rose 3 points, from 22% to 25%.
The decision followed the market's expectations regarding the increase in fiscal risk.
There is a consensus that inflation will exceed the 3.75% target set by the National Monetary Council for this year.
The Copom already aims to control 2022 and 2023 prices.
Translated by Kiratiana Freelon