Banks in Brazil rarely have a hard life. Whether interest rates are high or low, fiscal policy tight or loose, the sector invariably finds a way to remain profitable. Fourth-quarter earnings simply reaffirmed that constant. Itaú Unibanco, Bradesco and Santander Brasil closed the year with strong capital buffers, manageable asset quality and ROEs that would be considered exceptional in developed markets — but in Brazil function as a starting point. Together, the three banks generated roughly R$ 87 billion in net income in 2025, up about 17% from the previous year, underscoring how resilient the model remains regardless of the cycle.
The relevant distinction is not the ability to generate profits, but the quality of those profits. Itaú Unibanco continues to set the benchmark for the system. With ROE above 24%, the bank crosses cycles without relying excessively on favourable macro winds. When interest rates fall, it gives up some automatic financial income, but offsets that with efficiency, lower credit costs and operational stability. Lower rates are not a catalyst for Itaú — they are simply less noise. Bradesco operates under a different logic. Profitability has recovered, credit growth is accelerating in a disciplined manner and the turnaround path is visible. Lower rates help, particularly in retail, easing delinquency and supporting the normalisation of credit costs. Still, execution remains the decisive factor. Santander Brasil represents the most defensive version of that equation. Profitable in virtually any scenario, with a conservative balance sheet and a comfortable ROE, the bank suffers less when rates fall and does not shine when they rise. A friendlier rate environment reduces the drag from market-related NII, but growth remains contained. It is a story of predictability — with a clearly defined ceiling.
Taken together, the message is straightforward. A falling Selic changes the composition of bank profits, not their existence. Brazilian banks do not depend on high interest rates to be profitable; they rely on scale, market power and a favourable regulatory design. The monetary cycle redistributes advantages — it does not create winners from scratch. The real test, therefore, lies outside this group. As rates decline, attention shifts to fintechs. For incumbent banks, profitability is an assumption. For fintechs, it remains an open question. The next round of earnings will show who built a bank — and who merely rode the cycle.