By Brazil Stock Guide – Sabesp (SBSP3) reported adjusted net income of R$1.9 billion ($380 million) in 4Q25, broadly flat year-on-year, while adjusted EBITDA rose 13% to R$3.4 billion ($680 million). The quarter marks a clear shift in the company’s profile, with higher investment intensity and growing pressure on the balance sheet.
Capital expenditures surged to R$4.8 billion ($950 million) in the quarter, up 73% from a year earlier. The increase reflects the acceleration of water and sewage projects following privatization, as the company expands its network and works to meet universalization targets across São Paulo. For the full year, capex reached R$15.2 billion ($3.0 billion), more than doubling from 2024, with most of the spending directed toward wastewater infrastructure and water supply expansion. The company said it expanded service coverage to millions of users and brought forward key operational targets.
The quarter confirms that investment is no longer a secondary variable but the central pillar of Sabesp’s growth strategy. The company is no longer relying primarily on efficiency gains or tariff adjustments. Growth is increasingly tied to physical execution, with projects delivered, networks expanded, and new users connected. This shift changes the risk profile, making Sabesp more dependent on execution timelines, regulatory milestones, and access to funding.
The balance sheet is already reflecting that transition. Long-term debt rose to R$35 billion ($6.9 billion), from R$22 billion a year earlier, while total liabilities reached R$61.8 billion ($12.2 billion). Based on annual EBITDA of R$13.2 billion, leverage stands at roughly 2.6x–2.7x net debt to EBITDA, a level that remains manageable for a regulated utility but is clearly trending higher.
While investment accelerates, revenue growth remains more modest. Net revenue rose 2.1% in 4Q25 to R$5.7 billion, supported by higher billed volumes, particularly in the residential segment. However, average tariffs declined as the customer mix shifted toward lower-income users and subsidized tariffs, reducing revenue per unit. The result is a familiar dynamic in infrastructure expansion cycles: scale increases, but monetization becomes more diluted in the short term.
Margins were preserved through cost discipline. Adjusted operating expenses fell 10% in the quarter, driven by lower administrative costs and workforce reductions. For the full year, costs declined 13%, reflecting a leaner operating structure and improved productivity. This cost base adjustment creates an important buffer, allowing the company to absorb pressure from revenue mix and rising interest expenses without immediate margin erosion.
Still, the financial environment is becoming more relevant. Higher debt increases sensitivity to interest rates, and in Brazil’s high-rate environment this factor is likely to weigh more heavily on future results. The fourth quarter lays out a clear equation: Sabesp has entered a capital-intensive expansion cycle, with ambitious targets and faster execution.
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