OSBC (Old Second Bancorp) Effective Interest Rate on Debt %: 22.36% (As of Mar. 2026)


OSBC Old Second Bancorp Inc OSBC
69 GF Score
Price $23.23
GF Value $18.69
Valuation Modestly Overvalued
! 7 Warning Signs
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What is Old Second Bancorp Effective Interest Rate on Debt %?

Old Second Bancorp OSBC -0.04% 69 Effective Interest Rate on Debt % is 22.36% as of Mar. 2026. GuruFocus rates OSBC with a GF Score™ of 69/100 and a GF Value™ of $18.69 (Modestly Overvalued). The stock has 7 warning signs investors should review.

Effective Interest Rate on Debt % is the usage rate that a borrower actually pays on a debt. It is calculated as the positive value of Interest Expense divided by its average total debt. Total debt equals to Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Old Second Bancorp's annualized positive value of Interest Expense for the quarter that ended in Mar. 2026 was $68.8 Mil. Old Second Bancorp's average total debt for the quarter that ended in Mar. 2026 was $307.7 Mil. Therefore, Old Second Bancorp's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 was 22.36%.


Old Second Bancorp  (NAS:OSBC) Effective Interest Rate on Debt % Explanation

Effective Interest Rate on Debt % measures the usage rate that a borrower actually pays on a debt.


Old Second Bancorp Effective Interest Rate on Debt % Related Terms


Old Second Bancorp Effective Interest Rate on Debt % Historical Data

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The historical data trend for Old Second Bancorp's Effective Interest Rate on Debt % can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Old Second Bancorp Effective Interest Rate on Debt % Chart

Old Second Bancorp Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Effective Interest Rate on Debt %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 6.98 5.47 11.14 18.90 29.60

Old Second Bancorp Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Effective Interest Rate on Debt % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 44.77 51.62 48.63 26.54 22.36

OSBC vs HFWA, CCB, UVSP: Effective Interest Rate on Debt % Comparison

For the Banks - Regional subindustry, Old Second Bancorp's Effective Interest Rate on Debt %, along with its competitors' market caps and Effective Interest Rate on Debt % data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Old Second Bancorp Effective Interest Rate on Debt % vs Banks Industry

For the Banks industry and Financial Services sector, Old Second Bancorp's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where Old Second Bancorp's Effective Interest Rate on Debt % falls into.


OSBC
69GF Score
Old Second Bancorp Inc OSBC
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
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Old Second Bancorp Effective Interest Rate on Debt % Calculation

Old Second Bancorp's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Dec. 2024 )+Total Debt  (A: Dec. 2025 ))/ count )
=-1  *  -62.217/( (105.24+315.151)/ 2 )
=-1  *  -62.217/210.1955
=29.60 %

where

Total Debt  (A: Dec. 2024 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=85.24 + 20
=105.24

Total Debt  (A: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=100.151 + 215
=315.151

Old Second Bancorp's annualized Effective Interest Rate on Debt % for the quarter that ended in Mar. 2026 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Dec. 2025 )+Total Debt  (Q: Mar. 2026 ))/ count )
=-1  *  -68.808/( (315.151+300.185)/ 2 )
=-1  *  -68.808/307.668
=22.36 %

where

Total Debt  (Q: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=100.151 + 215
=315.151

Total Debt  (Q: Mar. 2026 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=100.185 + 200
=300.185

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

In the calculation of annual Effective Interest Rate on Debt %, the Interest Expense of the last fiscal year and the average total debt over the fiscal year are used. In calculating the quarterly data, the Interest Expense data used here is four times the quarterly (Mar. 2026) interest expense data. Effective Interest Rate on Debt % is displayed in the 30-year financial page.

What does a Effective Interest Rate on Debt % of 22.36% mean?
Old Second Bancorp (OSBC) has a Effective Interest Rate on Debt % of 22.36% as of Mar. 2026. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Old Second Bancorp and its competitors.
Is Old Second Bancorp's Effective Interest Rate on Debt % too high?
Old Second Bancorp's current Effective Interest Rate on Debt % is 22.36%. Overall, Old Second Bancorp has a GF Score™ of 69/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Old Second Bancorp's Effective Interest Rate on Debt % compare to HFWA and CCB?
Old Second Bancorp's Effective Interest Rate on Debt % of 22.36% can be compared against companies in the Banks industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Effective Interest Rate on Debt % for a Banks company?
A good Effective Interest Rate on Debt % depends on the Banks industry context. However, Effective Interest Rate on Debt % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Effective Interest Rate on Debt % mean?
A high Effective Interest Rate on Debt % can signal that a stock is expensive relative to its fundamentals. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Old Second Bancorp and its competitors. Old Second Bancorp's current Effective Interest Rate on Debt % is 22.36%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Old Second Bancorp stock overvalued right now?
Based on GuruFocus' analysis, Old Second Bancorp (OSBC) is currently considered Modestly Overvalued. The stock's GF Value™ is $18.69, compared to a current price of $23.23 — trading 24.3% above its estimated fair value. The current Effective Interest Rate on Debt % is 22.36%. Old Second Bancorp's overall GF Score™ is 69/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Effective Interest Rate on Debt % calculated?
Effective Interest Rate on Debt % is calculated from a company's financial statements. For Old Second Bancorp (OSBC), the current Effective Interest Rate on Debt % is 22.36% as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Old Second Bancorp (OSBC) Overvalued in 2026?

Based on GuruFocus' analysis, Old Second Bancorp stock appears to be overvalued. The current stock price of $23.23 is trading 24.3% above its estimated GF Value™ of $18.69. GuruFocus considers Old Second Bancorp to be Modestly Overvalued.

Key valuation signals for OSBC:

  • Effective Interest Rate on Debt %: 22.36%
  • GF Value™: $18.69 vs. price of $23.23 (24.3% above fair value)
  • GF Score™: 69/100 with 7 warning signs

No single metric tells the full story. See the OSBC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Old Second Bancorp Business Description

Address 37 South River Street, Aurora, IL, USA, 60507
Old Second Bancorp Inc is a bank holding company. It provides consumer and commercial banking products such as demand, money market, savings, time deposit, and individual retirement as well as commercial, industrial, consumer, and real estate lending, including installment loans, student loans, agricultural loans, lines of credit and overdraft checking, safe deposit operations, trust services, wealth management services, and additional services tailored to the needs of individual customers, corporates, small-medium enterprises. The company has one operating segment, which is community banking. The company's revenue consists of interest, commission, payments, and other income.
69GF Score

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Effective Interest Rate on Debt % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$23.23
Price
$18.69
GF Value