# National Treasury Faces R$ 1.8 Trillion Debt Refinancing Challenge Short-term debt concentration and high interest rates pressure Brazil's federal public debt management. - **Source:** [Poder360](https://www.poder360.com.br) - **Published:** 2026-11-09 - **Topic:** [Finance](https://brifing.si/c/finance) - **Original article:** - **On Brifing:** https://brifing.si/s/6c654374-1293-4196-88ec-f066f0029be9 ## Refinancing Burden Escalates The National Treasury must refinance approximately R$ 1.87 trillion in federal public debt over the next twelve months. This amount represents 19.95% of the total debt stock as of September 2026. This significant concentration of short-term maturities requires the government to secure substantial new funding amidst challenging market conditions and high costs. ## Rising Short-Term Exposure The portion of debt maturing within one year rose sharply from 16.39% in August to 19.95% in September. This 3.56 percentage point increase in just one month highlights the growing pressure on the Treasury. Such concentration increases exposure to current market volatility, forcing the government to manage frequent and large-scale bond renewals. ## Total Debt Stock Growth The total stock of federal public debt reached R$ 9.38 trillion in September 2026, marking an increase of R$ 90.2 billion compared to the previous month. As bonds reach their maturity dates, the Treasury must either utilize available cash reserves or issue new securities to replace the maturing obligations, impacting overall fiscal stability. ## Selic Rate Sensitivity A significant portion of the debt, totaling R$ 4.84 trillion or 51.60% of the total stock, is indexed to the Selic rate. Unlike fixed-rate bonds, these floating-rate instruments make the government's debt servicing costs highly sensitive to monetary policy decisions, directly linking fiscal expenditure to the central bank's interest rate adjustments. ## Rising Cost of Debt The average cost of the public debt stock accumulated over the last twelve months rose to 12.63% per year in September, up from 12.59% in August. This upward trend in financing costs reflects the persistent environment of elevated interest rates, which complicates the government's ability to manage its financial obligations efficiently. ## Liquidity Buffer Constraints The Treasury's liquidity buffer, used to honor debt payments, reached R$ 1.27 trillion in September 2026. While the nominal value increased by 5.33% from August, the coverage capacity dropped to 7.71 months of maturities. This is a decline from the 9.33 months of coverage recorded in September 2025, indicating reduced fiscal flexibility. ## Historical Maturity Context The current concentration of short-term debt is notable when compared to historical data. In November 2006, the portion of debt maturing within twelve months stood at 31.67%. Although this indicator trended downward for many years, the recent spike in September 2026 reverses that long-term progress, creating new challenges for debt sustainability. ## Strategic Fiscal Implications The combination of high short-term maturity concentration, heavy reliance on Selic-linked bonds, and a tighter liquidity buffer creates a complex environment for the Treasury. Future stability depends on market appetite for longer-term bonds and the trajectory of interest rates, as the government navigates these significant refinancing requirements in the coming year. ## Sources covering this story - https://www.poder360.com.br/poder-economia/tesouro-tera-de-refinanciar-r-18-trilhao-em-12-meses/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._