Banco Santander, S.A. (SAN) Income Statement

The sequential recovery from 2025Q3's $8.8B trough suggests some stabilization, but the year-over-year decline indicates that the tailwind from higher rates is dissipating. With NIM stuck at 0.6% for five consecutive quarters, the bank appears unable to expand spreads despite its diversified deposit base. Investors should monitor whether loan repricing in Brazil and Mexico can offset funding cost pressures in Europe.

The persistent 0.6% NIM, despite a diversified corridor strategy, implies that the bank is not capturing the full benefit of higher rates in its emerging market units. This stagnation may indicate intense competition for deposits in Brazil and Mexico, or a mix shift toward lower-yielding assets. Without a meaningful improvement in NIM, revenue growth will remain constrained, making cost discipline and fee income even more critical.

The dramatic swing in the efficiency ratio between quarters—from 24.4% to 46.0% and back—suggests that total revenue figures are being distorted, likely by hyperinflation accounting or one-off items. The underlying cost base remains high, with operating margin at 15.6% versus BBVA's 43.9%, indicating that Santander's extensive branch network and emerging market operations create significant operational drag. Sustainable efficiency gains would require a more aggressive digital migration and branch rationalization.

The provision expense of $3.2B in 2026Q1 is roughly in line with recent quarters, but the stability masks a high absolute level relative to revenue. With provisions consuming over 10% of total revenue, credit costs are a significant drag on profitability. The bank's exposure to unsecured consumer lending through Santander Consumer Finance and to Latin American economies suggests that asset quality will remain a key swing factor, especially if economic conditions deteriorate.

The fee ratio's fluctuation between 13% and 28% across quarters indicates that fee income is not a stable offset to NII. While wealth management and insurance fees likely provide a recurring base, the sharp drop in 2026Q1 suggests a pullback in transaction-driven fees, possibly from CIB activities. This variability underscores the importance of diversifying revenue streams beyond interest income, but also highlights the cyclicality of non-interest income.

The EPS jump, driven by a lower share count and possibly one-off gains, contrasts with the -3.2% NII growth, suggesting that earnings quality may be mixed. The absence of explicit forward guidance in the report could indicate management caution about sustaining this earnings level. This quarter may represent a peak in profitability if revenue continues to stagnate and credit costs remain high, making it a critical reference point for future performance.