Nature of Business and Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]
Nature of operations	Nature of operations: Capital Bancorp, Inc. is a Maryland corporation and the bank holding company (the “Company”) for Capital Bank, N.A. (the “Bank”). The Company's primary operations are conducted by the Bank, which is headquartered in Rockville, Maryland. The Company operates three additional divisions including, OpenSky™, Windsor Advantage, LLC (“Windsor Advantage™”) and Capital Bank Home Loans (“CBHL”). The Company serves businesses, not-for-profit associations, entrepreneurs and others throughout the Washington D.C., Baltimore, other Maryland metropolitan areas, Florida, Illinois and North Carolina through seven commercial bank branches, one mortgage banking office, three loan production offices, three government loan servicing offices, and one credit card operations office. The Bank is principally engaged in providing commercial, real estate, and credit card loans along with other banking services, and attracting deposits. The Company issues credit cards through OpenSky™, a digitally-driven, nationwide credit card platform providing secured, partially secured, and unsecured credit solutions. Windsor Advantage™, a wholly-owned subsidiary of the Company, is a loan service provider that offers community banks and credit unions a comprehensive U.S. Small Business Association (“SBA”) 7(a) and U.S. Department of Agriculture (“USDA”) lending platform. The Company originates residential mortgages for sale in the secondary market through CBHL, the Bank’s residential mortgage banking arm. In addition, the Company owns all of the stock of Capital Bancorp (MD) Statutory Trust I (the “Trust”). The Trust is a special purpose non-consolidated entity organized for the sole purpose of issuing trust preferred securities.
Basis of presentation	Basis of presentation: The accompanying unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with rules and regulations of the Securities and Exchange Commission (“SEC”) and include the activity of the Company and its wholly-owned subsidiaries, the Bank, Windsor Advantage™, and Church Street Capital, LLC (“CSC”). The statements do not include all of the information and footnotes required by GAAP for complete financial statements. All adjustments have been made which, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. Such adjustments are all of a normal and recurring nature. All significant inter-company accounts and transactions have been eliminated in consolidation. The results of operations for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for the full year. These unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited financial statements and the notes thereto as of December 31, 2024, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024. The Company reports its activities as four divisions and reporting segments: Commercial Banking, OpenSky™, Windsor Advantage™, and Capital Bank Home Loans. In determining the appropriateness of segment definition, the Company considers components of the business about which financial information is available and regularly evaluated relative to resource allocation and performance assessment.
Recent Adoption of New Accounting Standards and Recently Issued Accounting Pronouncements	Recent Adoption of New Accounting Standards: In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2023-07, "Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures" ("ASU 2023-07"). ASU 2023-07 requires public entities to disclose significant segment expenses, an amount and description for other segment items, the title and position of the entity’s chief operating decision maker ("CODM") and an explanation of how the CODM uses the reported measures of profit or loss to assess segment performance, and, on an interim basis, certain segment related disclosures that previously were required only on an annual basis. ASU 2023-07 also clarifies that entities with a single reportable segment are subject to both new and existing segment reporting requirements and that an entity is permitted to disclose multiple measures of segment profit or loss, provided that certain criteria are met. ASU 2023-07 is effective for the Company for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-07 effective December 31, 2024. See Note 9 - Segments for new disclosures required by ASU 2023-07. Recently Issued Accounting Pronouncements: In December 2023, the FASB issued Accounting Standards Update 2023-09, “Income Taxes (Topic 740), Improvements to Income Tax Disclosures” (“ASU 2023-09”). ASU 2023-09 requires public entities to disclose in their rate reconciliation table additional categories of information about federal, state and foreign income taxes and to provide more details about the reconciling items in some categories if items meet a quantitative threshold. ASU 2023-09 also requires all entities to disclose income taxes paid, net of refunds, disaggregated by federal, state and foreign taxes for annual periods and to disaggregate the information by jurisdiction based on a quantitative threshold, among other things. ASU 2023-09 is effective for the Company for fiscal years beginning after December 15, 2024 with early adoption permitted. The Company will update its income tax disclosures upon adoption. In November 2024, the FASB issued Accounting Standards Update 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" ("ASU 2024-03"). ASU 2024-03 requires public entities to provide disaggregated disclosures, in the notes to the financial statements, of certain categories of expenses that are included in expense line items on the face of the income statement. ASU 2024-03 is effective for the Company for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company will update its expense disclosures upon adoption. In September 2025, the FASB issued Accounting Standards Update 2025-06 “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software” (“ASU 2025-06”). ASU 2025-06 makes targeted improvements to Subtopic 350-40 to increase the operability of the recognition guidance considering different methods of software development. ASU 2025-06 is effective for the Company for fiscal years beginning after December 15, 2027, and interim reporting periods in those years, with early adoption permitted. The Company will update its software capitalization policy upon adoption. Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies are not expected to have a material impact on the Company's financial position, results of operations or cash flows.
Reclassifications	Reclassifications: Certain reclassifications have been made to amounts reported in prior periods to conform to the current period presentation. The reclassifications had no effect on net income or total stockholders' equity.
Subsequent events	Subsequent events: Subsequent events are events or transactions that occur after the balance sheet date but before financial statements are issued. Recognized subsequent events are events or transactions that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements. Non-recognized subsequent events are events that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date.
Fair Value	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: Level 1 - Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. This includes certain U.S. Treasury and other U.S. Government and government agency securities actively traded in over-the-counter markets. Level 2 - Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3 - Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.

Nature of Business and Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2025

Nature of operations:

Capital Bancorp, Inc. is a Maryland corporation and the bank holding company (the “Company”) for Capital Bank, N.A. (the “Bank”). The Company's primary operations are conducted by the Bank, which is headquartered in Rockville, Maryland. The Company operates three additional divisions including, OpenSky™, Windsor Advantage, LLC (“Windsor Advantage™”) and Capital Bank Home Loans (“CBHL”).

The Company serves businesses, not-for-profit associations, entrepreneurs and others throughout the Washington D.C., Baltimore, other Maryland metropolitan areas, Florida, Illinois and North Carolina through seven commercial bank branches, one mortgage banking office, three loan production offices, three government loan servicing offices, and one credit card operations office. The Bank is principally engaged in providing commercial, real estate, and credit card loans along with other banking services, and attracting deposits.

The Company issues credit cards through OpenSky™, a digitally-driven, nationwide credit card platform providing secured, partially secured, and unsecured credit solutions. Windsor Advantage™, a wholly-owned subsidiary of the Company, is a loan service provider that offers community banks and credit unions a comprehensive U.S. Small Business Association (“SBA”) 7(a) and U.S. Department of Agriculture (“USDA”) lending platform. The Company originates residential mortgages for sale in the secondary market through CBHL, the Bank’s residential mortgage banking arm.

In addition, the Company owns all of the stock of Capital Bancorp (MD) Statutory Trust I (the “Trust”). The Trust is a special purpose non-consolidated entity organized for the sole purpose of issuing trust preferred securities.

Basis of presentation

Basis of presentation:

The accompanying unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with rules and regulations of the Securities and Exchange Commission (“SEC”) and include the activity of the Company and its wholly-owned subsidiaries, the Bank, Windsor Advantage™, and Church Street Capital, LLC (“CSC”). The statements do not include all of the information and footnotes required by GAAP for complete financial statements. All adjustments have been made which, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. Such adjustments are all of a normal and recurring nature. All significant inter-company accounts and transactions have been eliminated in consolidation. The results of operations for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for the full year. These unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited financial statements and the notes thereto as of December 31, 2024, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

The Company reports its activities as four divisions and reporting segments: Commercial Banking, OpenSky™, Windsor Advantage™, and Capital Bank Home Loans. In determining the appropriateness of segment definition, the Company considers components of the business about which financial information is available and regularly evaluated relative to resource allocation and performance assessment.

Recent Adoption of New Accounting Standards and Recently Issued Accounting Pronouncements

Recent Adoption of New Accounting Standards:

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2023-07, "Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures" ("ASU 2023-07"). ASU 2023-07 requires public entities to disclose significant segment expenses, an amount and description for other segment items, the title and position of the entity’s chief operating decision maker ("CODM") and an explanation of how the CODM uses the reported measures of profit or loss to assess segment performance, and, on an interim basis, certain segment related disclosures that previously were required only on an annual basis. ASU 2023-07 also clarifies that entities with a single reportable segment are subject to both new and existing segment reporting requirements and that an entity is permitted to disclose multiple measures of segment profit or loss, provided that certain criteria are met. ASU 2023-07 is effective for the Company for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-07 effective December 31, 2024. See Note 9 - Segments for new disclosures required by ASU 2023-07.

Recently Issued Accounting Pronouncements:

In December 2023, the FASB issued Accounting Standards Update 2023-09, “Income Taxes (Topic 740), Improvements to Income Tax Disclosures” (“ASU 2023-09”). ASU 2023-09 requires public entities to disclose in their rate reconciliation table additional categories of information about federal, state and foreign income taxes and to provide more details about the reconciling items in some categories if items meet a quantitative threshold. ASU 2023-09 also requires all entities to disclose income taxes paid, net of refunds, disaggregated by federal, state and foreign taxes for annual periods and to disaggregate the information by jurisdiction based on a quantitative threshold, among other things. ASU 2023-09 is effective for the Company for fiscal years beginning after December 15, 2024 with early adoption permitted. The Company will update its income tax disclosures upon adoption.

In November 2024, the FASB issued Accounting Standards Update 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" ("ASU 2024-03"). ASU 2024-03 requires public entities to provide disaggregated disclosures, in the notes to the financial statements, of certain categories of expenses that are included in expense line items on the face of the income statement. ASU 2024-03 is effective for the Company for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company will update its expense disclosures upon adoption.

In September 2025, the FASB issued Accounting Standards Update 2025-06 “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software” (“ASU 2025-06”). ASU 2025-06 makes targeted improvements to Subtopic 350-40 to increase the operability of the recognition guidance considering different methods of software development. ASU 2025-06 is effective for the Company for fiscal years beginning after December 15, 2027, and interim reporting periods in those years, with early adoption permitted. The Company will update its software capitalization policy upon adoption.

Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies are not expected to have a material impact on the Company's financial position, results of operations or cash flows.

Reclassifications

Reclassifications:

Certain reclassifications have been made to amounts reported in prior periods to conform to the current period presentation. The reclassifications had no effect on net income or total stockholders' equity.

Subsequent events

Subsequent events:

Subsequent events are events or transactions that occur after the balance sheet date but before financial statements are issued. Recognized subsequent events are events or transactions that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements. Non-recognized subsequent events are events that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date.

Fair Value

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

Level 1 - Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. This includes certain U.S. Treasury and other U.S. Government and government agency securities actively traded in over-the-counter markets.

Level 2 - Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3 - Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.