Southside Bancshares (SBSI) Q1 2026 earnings review
Margin Expansion and Asset Quality Win Overshadow Rising Expenses
Southside Bancshares delivered a highly constructive Q1 2026, achieving $23.3M in net income (+8.1% YoY) and cleanly exiting a major credit headache. The bank's margin narrative is accelerating: Net Interest Margin (FTE) expanded for the third consecutive quarter to 3.01%, aided by falling deposit costs and the mid-quarter redemption of expensive 7.51% subordinated notes. Meanwhile, nonperforming assets plummeted 75% sequentially following the successful payoff of a $27.5M restructured commercial real estate loan. The primary blemish is on the cost side—noninterest expenses surged 9.4% YoY as the bank absorbs costs for its core system migration and data platform buildout.
🐂 Bull Case
NIM hit 3.01%, up 3 bps QoQ and 15 bps YoY. With a full quarter's benefit of the retired $93M high-cost subordinated notes coming in Q2, margin expansion is well-protected.
NPAs dropped from 0.45% of assets to an incredibly clean 0.11% following the successful payoff of a large, restructured CRE loan that had weighed on the narrative for over a year.
🐻 Bear Case
The 2.7% QoQ loan growth was entirely funded by wholesale channels. Brokered deposits jumped 16.5% QoQ, while sticky retail and public fund deposits both declined.
Noninterest expense jumped 8.3% QoQ to $40.6M. While some of this relates to one-time debt redemption costs, core salary and software expenses are structurally shifting higher.
⚖️ Verdict: 🟢
Bullish. The bank successfully delivered on its two most critical promises: expanding the net interest margin and resolving its heavily concentrated nonperforming asset. While the wholesale funding shift warrants monitoring, the balance sheet is decidedly de-risked.
Key Themes
Asset Quality Risk Decisively Reversing
Reversing trend. For the past year, Southside's NPA ratio hovered elevated near 0.45%, highly concentrated in a single $27.5M restructured CRE/multifamily loan. In Q1 2026, this loan successfully paid off. Total NPAs collapsed by 74.6% sequentially to just $9.7M (0.11% of total assets). This proves management's consistent claims throughout 2025 that the underlying collateral and sponsor were strong, removing a significant bearish talking point.
Net Interest Margin Accelerating
Accelerating trend. NIM (FTE) climbed to 3.01%, up from 2.98% in Q4 and 2.86% a year ago. The driver is a favorable macro backdrop for deposit pricing: the cost of interest-bearing deposits dropped 8 bps QoQ to 2.65%. Furthermore, the bank redeemed $93M of expensive 7.51% subordinated notes in mid-February, effectively locking in further funding cost relief for Q2.
Construction and CRE Driving Loan Growth
Accelerating trend. After struggling with heavy, unpredictable payoff headwinds throughout early 2025, loan production is finally overwhelming payoffs. Total loans grew 2.7% QoQ ($128.2M). Growth was heavily concentrated in Construction (+$93.2M) and Commercial Real Estate (+$40.6M), validating the massive pipelines management cited in prior quarters.
Funding Mix Quality Decelerating
Decelerating trend. While Southside boasts strong top-line loan growth and lower deposit costs, the underlying deposit composition contradicts the 'strong core deposit' narrative. Q1 loan growth was funded entirely by wholesale sources. Brokered deposits surged 16.5% (+$110.7M) QoQ. Meanwhile, highly valued retail deposits shrank 1.6% (-$82.0M) and public funds dropped 1.7% (-$19.4M). Overreliance on brokered funding increases liquidity risk and limits future margin flexibility.
Core Technology Shift Drives Expense Drag
Accelerating trend. Noninterest expense rose 9.4% YoY and 8.3% QoQ to $40.6M. This includes a $791K hit from retiring subordinated debt, but core drivers were software/data processing (up 8.4% YoY) and salaries. Management warned in 25Q4 of a heavy investment cycle required to move the core system off-premise and build a new data platform. These operational investments are pressuring the efficiency ratio, which sits at an elevated 56.44%.
Uninsured Deposit Exposure
Stable trend. Estimated uninsured deposits sit at 38.4% of total deposits. While this drops to 21.9% when excluding affiliate and collateralized public funds, it remains a notable metric in the broader macro banking environment, requiring Southside to maintain high levels of available contingent liquidity ($2.68 billion currently).
Other KPIs
Accelerating trend. Up 23.2% YoY, driven by strong growth in Trust Fees ($2.2M, up 25% YoY) and other noninterest income. The massive 125.8% sequential jump is an optical anomaly, as 25Q4 included a deliberate $7.3M loss on the restructuring of the AFS securities portfolio.
Accelerating trend. Up from $581K in 25Q4 and $758K a year ago. The allowance for loan losses now sits at 0.93% of total loans, down slightly from 0.94% last quarter due to improvements in the macroeconomic CECL forecast and better commercial borrower metrics.
Guidance
Accelerating. Management explicitly stated they expect further savings on funding costs during the second quarter. This is mathematically secured by the mid-quarter (February 2026) redemption of $93M in 7.51% subordinated notes, the full benefit of which will hit the Q2 run-rate.
Key Questions
Brokered Deposit Reliance
Loan growth this quarter was robust, but it was funded by a 16.5% jump in brokered deposits while retail deposits shrank. What are your initiatives to stem retail deposit outflows, and what is your internal ceiling for brokered deposit concentration?
CRE Portfolio Post-Resolution
With the successful payoff of the $27.5M restructured CRE loan, nonperforming assets are exceptionally clean. Given the $93M growth in construction loans this quarter, how are you viewing CRE limits and underwriting standards in the current rate environment?
Expense Run-Rate Normalization
Noninterest expenses hit $40.6M, which tracks higher than the ~$39.5M Q1 guide given last quarter. Excluding the $791K debt redemption charge, what is the new normalized quarterly run-rate as we scale the core system migration and data platform investments?