Old Second Bancorp, Inc.401(k)
OLD SECOND BANCORP, INC EMPLOYEES 401(K) SAVINGS PLAN & TRUST · AURORA, IL · plan year 2025
Peer grade: B+ · admin costs + employer contributions vs same-size plans · how grading works
Old Second Bancorp, Inc. reported $41,151 in plan administrative expenses for 2025: 0.04% of average plan assets, lower than ~75% of peers. Employer contributions averaged $2,607 per active participant. This ratio covers administrative expenses reported on the plan's Schedule H only; fund-level expense ratios are not included in public structured data — see methodology.
Across the 3 years on file its reported administrative ratio rose from 0.02% to 0.04%. The plan sits in the $50M–$250M size bracket, benchmarked here against 605 comparable plans and shown alongside other finance & insurance employers. By assets it is the 488th-largest of 3,702 plans among Illinois employers on file, and the 867th of 4,798 in finance & insurance. In 2025, employees put in $2.14 for every $1.00 the employer contributed; active participation has grown from 808 to 1,051 since 2022.
Old Second Bancorp, Inc.'s 2025 employer contribution ran below the $4,093 median for plans its size. Filings report dollars actually contributed, not the match formula; the formula itself (for example, 50% of the first 6% of pay) lives in the plan's summary plan description from HR.
Annual cost at the plan's reported 2025 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.
Compensation shown is direct payments from plan assets reported on Schedule C. Providers paid through fund revenue-sharing appear as indirect.
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Source: U.S. Department of Labor, Form 5500 series, EIN 363143493 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.