Old Second National Bank: Deposit Base
Data as of · Call Report Schedules RC-E and RC-O How we update
How the bank is funded. Core deposits are the stable, mostly-insured relationship money; brokered and uninsured balances are the fastest to leave. The 2023 regional bank failures were runs on uninsured deposits, which is why that share now gets read first.
Loans and leases to core deposits climbed 3.12 percentage points in Q2 2026, from 96.04% to 99.16%. It was the largest change from Q1 2026 among the key lines here. On total deposits, Old Second National Bank ranks 13th highest among the 323 banks headquartered in Illinois, at $5.47B (Q2 2026). Against a median of $1.67B for banks in the $1B-10B asset tier, Old Second National Bank reported $5.47B on total deposits in Q2 2026, 227% higher.
Deposit totals
| Line item | Q2 2026 |
|---|---|
| Total deposits | $5.47B |
| Domestic office deposits | $5.47B |
| Foreign office deposits | — |
| Deposits to total assets | 79.68% |
| Deposits to total liabilities | 92.10% |
Deposit composition
| Line item | Q2 2026 |
|---|---|
| Demand deposits | $1.75B |
| Savings deposits | $1.11B |
| Transaction accounts to domestic deposits | 45.50% |
| Time deposits | $17K |
| Time deposits under $100k | $409.6M |
| Time deposits $100k to $250k | $342.6M |
| Time deposits over $250k | $174.3M |
| Noninterest-bearing share of deposits | 32.36% |
Stability of funding
| Line item | Q2 2026 |
|---|---|
| Core deposits | $5.26B |
| Core deposits to total deposits | 96.26% |
| Insured deposits | $3.99B |
| Uninsured deposits | $1.48B |
| Uninsured deposits to total deposits | 27.10% |
| Brokered deposits | $30.3M |
| Brokered deposits to total deposits | 0.55% |
Cost of deposits
| Line item | Q2 2026 |
|---|---|
| Cost of interest-bearing deposits | 1.46% |
| Interest expense on deposits | $13.7M |
| Loans and leases to core deposits | 99.16% |
Deposit Base trend
Last 12 quarters as filed. Every value plotted here also appears in the tables above.
Deposit Base by quarter
| Quarter | Total deposits | Core deposits | Uninsured deposits | Brokered deposits | Cost of interest-bearing deposits |
|---|---|---|---|---|---|
| Q3 2023 | $4.63B | 98.56% | 25.14% | 0.00% | 0.65% |
| Q4 2023 | $4.61B | 98.23% | 25.82% | 0.00% | 0.90% |
| Q1 2024 | $4.64B | 98.04% | 24.69% | 0.00% | 1.17% |
| Q2 2024 | $4.55B | 97.70% | 25.20% | 0.00% | 1.32% |
| Q3 2024 | $4.52B | 97.48% | 25.26% | 0.00% | 1.49% |
| Q4 2024 | $4.85B | 97.41% | 23.99% | 0.00% | 1.40% |
| Q1 2025 | $4.93B | 97.61% | 25.08% | 0.00% | 1.26% |
| Q2 2025 | $4.87B | 97.38% | 26.13% | 0.00% | 1.30% |
| Q3 2025 | $5.80B | 94.29% | 24.70% | 1.42% | 2.24% |
| Q4 2025 | $5.66B | 95.26% | 25.57% | 1.05% | 1.68% |
| Q1 2026 | $5.60B | 95.88% | 26.08% | 0.60% | 1.50% |
| Q2 2026 | $5.47B | 96.26% | 27.10% | 0.55% | 1.46% |
Old Second National Bank deposit base, all the way back
Deposit Base back to 2001 · peer percentiles on every line item · Excel export
Unlock Old Second National Bank, freeSource: Call Report Schedules RC-E and RC-O, as filed with the FFIEC and standardized by BankRegReports. Dollar amounts are as reported, point-in-time; income statement items are year-to-date through the report date. See the full Old Second National Bank profile, peer group comparison, or how this data updates.
Regulator records: FDIC BankFind (cert 3603) · FFIEC NIC profile (RSSD 936136)