Third Coast Bancshares (TCBX) Q4 2025 earnings review
Record Year Capped by Loan Surge and Stable Margins
Third Coast delivered a robust finish to a record-breaking FY2025. While Q4 Net Income dipped slightly sequentially ($17.9M vs $18.1M) due to merger-related costs and bonuses, the core engine is firing on all cylinders. Loan growth accelerated dramatically (+5.5% QoQ), and Net Interest Margin (NIM) held firm at a high 4.10%. The bank has effectively transformed its profitability profile, with FY25 EPS of $3.79 up 36% from $2.78 in FY24.
🐂 Bull Case
After modest growth in prior quarters, Q4 loans surged $229M (+5.5% QoQ). This indicates the 'lumpy' growth management warned of in Q3 has materialized to the upside, particularly in Commercial & Industrial lending (+$134M).
Despite a volatile rate environment, NIM held flat sequentially at 4.10% and is up 39 bps YoY. The bank is successfully managing funding costs, with interest expense dropping 4.2% QoQ despite deposit growth.
🐻 Bear Case
Noninterest expense jumped 13% sequentially to $32.7M. While partially due to merger costs ($1.0M) and severance/bonuses ($1.5M), the Efficiency Ratio deteriorated to 57.9% from 53.0% in Q3, moving away from the <55% ideal.
The pending acquisition of Keystone Bancshares (incurring $1M in costs this quarter) introduces execution risk for FY26. Integration distractions could slow the organic momentum seen in Q4.
⚖️ Verdict: 🟢
Bullish. The core banking metrics—loan growth and margin—are excellent. The earnings 'miss' vs Q3 is entirely explained by one-time merger and personnel costs. Underlying asset generation is accelerating.
Key Themes
Commercial & Industrial (C&I) Powering Growth
Accelerating. C&I loans were the primary engine for the quarter, growing $134.6M sequentially. This high-value lending category is driving the portfolio expansion more than Real Estate (+$44.8M) or Municipal loans (+$50.0M), suggesting strong business activity adoption in the Texas Triangle markets.
Merger & Personnel Costs Weigh on Efficiency
Reversing. The efficiency ratio had been trending down (positive) throughout 2025, hitting 53.0% in Q3. In Q4, it spiked back to 57.9%. Drivers included $1.0M in legal/professional fees (Merger) and $1.5M in sign-on bonuses/severance. While likely transitory, this creates a 'noisy' expense baseline for 2026.
Funding Cost Management
Stable/Improving. Interest expense decreased $1.8M (-4.2%) sequentially, even as total deposits grew by $316M (+7.3%). The cost of interest-bearing deposits dropped 25 basis points QoQ to 3.73%. Management is effectively repricing liabilities faster than assets are rolling off.
Credit Quality Stabilization
Improving. Nonperforming loans (NPLs) dropped to $21.5M (0.49% of loans) from 0.70% a year ago. Net charge-offs remained low at $844k for the quarter (approx 0.08% annualized). The bank is growing the loan book rapidly without seeing a concurrent spike in bad debts.
Non-Margin Fee Income
Accelerating. Noninterest income rose to $4.3M (+17% QoQ). This was driven by 'non-margin loan fees.' As the bank scales, its ability to generate fee income reducing reliance on spread income is becoming more visible.
Other KPIs
Accelerating. Up 17.7% YoY from $27.29. This rapid compounding of book value confirms the high ROE/ROA nature of the current operating model.
Accelerating. Up $316M in the quarter. Notably, noninterest-bearing deposits increased to $495M (10.7% of total), reversing a flat trend seen in Q3.
Stable. Down slightly from 1.41% in Q3 due to the merger expenses, but significantly higher than the 1.13% posted in 24Q4. The bank has structurally shifted its profitability tier.
Guidance
Management did not provide specific numeric guidance tables in the press release. However, the CEO statement emphasizes that the bank is 'doing exactly what we said we would do,' implying adherence to the long-term growth targets discussed in prior quarters (approx. 8-10% loan growth).
Key Questions
Expense Run-Rate vs One-Offs
Noninterest expense jumped $3.8M sequentially. You identified $2.5M as merger/personnel related. Should we view the remaining $1.3M increase as the new core run-rate, or were there other transitory items?
C&I Lending Surge Sustainability
C&I loans grew $135M in Q4 alone, a massive acceleration. Was this driven by a few large concentrated deals or broad-based demand? Is this pace sustainable into Q1 2026?
NIM Outlook with Rate Cuts
You successfully lowered deposit costs by 25bps this quarter, holding NIM at 4.10%. As we look at the 2026 rate curve, do you expect to maintain NIM above 4.00%, or will asset repricing eventually compress this?
Keystone Merger Timeline
With $1.0M in merger expenses already booked, can you update us on the expected closing date for Keystone and when we will see the full cost synergies realized?