International Journal of Quantitative Research and Modeling
Vol. 7 No. 2 (2026): International Journal of Quantitative Research and Modeling (IJQRM)

The Effect of Capital Adequacy Ratio (CAR), Net Interest Margin (NIM), and Operating Expenses to Operating Income (BOPO) on Profit Growth in Banking Companies Listed on the Indonesia Stock Exchange for the Period 2019–2024

Sarah Samratul Saadah (Universitas Cipasung Tasikmalaya)
Aldy Agustian (Universitas Cipasung Tasikmalaya)



Article Info

Publish Date
30 Jun 2026

Abstract

Centered around banking institutions listed on the Indonesia Stock Exchange from 2019 to 2024, this paper explores how net interest margin (NIM), capital adequacy ratio (CAR), and the operating ratio (BOPO) steer profit growth. By adopting a quantitative framework, we pulled secondary data directly from the firms' annual financial disclosures. A purposive sampling approach narrowed our scope down to 19 banks, yielding 114 distinct observations for analysis. To process this data, we utilized multiple linear regression coupled with classic assumption checks, coefficient of determination, plus F and t tests. Our analysis brought several insights to light. First, CAR yields a positive, meaningful pull on profit growth ($t = 3.412, p = 0.000$). Second, NIM similarly drives profit growth upward in a significant manner ($t = 3.081, p = 0.000$). On the flip side, BOPO exerts a clear negative drag on earnings growth ($t = -2.338, p = 0.001$). Taken together, these three elements simultaneously dictate profit shifts ($F = 19.409, p = 0.000$), explaining roughly 64.6% of the variance ($R^2 = 0.646$). Ultimately, keeping capital adequate, maximizing interest returns, and tightening operational efficiency stand out as the core pillars of bank profitability

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Journal Info

Abbrev

ijqrm

Publisher

Subject

Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Physics

Description

International Journal of Quantitative Research and Modeling (IJQRM) is published 4 times a year and is the flagship journal of the Research Collaboration Community (RCC). It is the aim of IJQRM to present papers which cover the theory, practice, history or methodology of Quatitative Research (QR) ...