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Capital Requirements and Regulatory Restrictions (Tables)

12 Months Ended

Dec. 31, 2024

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The Company’s and the Bank’s actual and required capital amounts and ratios are as follows:

			Actual												Capital Requirements												Requirement to be Well-Capitalized
(In thousands)			Amount						Ratio						Amount						Ratio						Amount						Ratio
At December 31, 2024
Total capital (to risk-weighted assets)
Cass Information Systems, Inc.			$	261,021					14.61		%				$	142,969					8.00		%				$        N/A						N/A %
Cass Commercial Bank			207,519						17.68						93,911						8.00						117,389						10.00
Common Equity Tier I Capital (to risk-weighted assets)
Cass Information Systems, Inc.			247,354						13.84						80,420						4.50						N/A						N/A
Cass Commercial Bank			194,446						16.56						52,825						4.50						76,303						6.50
Tier I capital (to risk-weighted assets)
Cass Information Systems, Inc.			247,354						13.84						107,226						6.00						N/A						N/A
Cass Commercial Bank			194,446						16.56						70,433						6.00						93,911						8.00
Tier I capital (to average assets)
Cass Information Systems, Inc.			247,354						10.57						93,625						4.00						N/A						N/A
Cass Commercial Bank			194,446						13.50						57,620						4.00						72,026						5.00
At December 31, 2023
Total capital (to risk-weighted assets)
Cass Information Systems, Inc.			$	269,580					15.49		%				$	139,266					8.00		%				$        N/A						N/A %
Cass Commercial Bank			204,584						19.04						85,964						8.00						107,455						10.00
Common Equity Tier I Capital (to risk-weighted assets)
Cass Information Systems, Inc.			256,359						14.73						78,337						4.50						N/A						N/A
Cass Commercial Bank			192,104						17.88						48,355						4.50						69,846						6.50
Tier I capital (to risk-weighted assets)
Cass Information Systems, Inc.			256,359						14.73						104,449						6.00						N/A						N/A
Cass Commercial Bank			192,104						17.88						64,473						6.00						85,964						8.00
Tier I capital (to average assets)
Cass Information Systems, Inc.			256,359						10.71						95,760						4.00						N/A						N/A
Cass Commercial Bank			192,104						12.49						61,526						4.00						76,908						5.00

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- References

No definition available.

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- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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