Regulatory Matters (Tables)

12 Months Ended

Sep. 30, 2022

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

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following tables compare the Bank’s actual capital amounts at September 30, 2022 and 2021 to its minimum regulatory capital requirements and "Well Capitalized" regulatory capital at those dates (dollars in thousands):

	Actual				Regulatory Minimum To Be "Adequately Capitalized"				Regulatory Minimum To Be "Well Capitalized" Under Prompt Corrective Action Provisions
September 30, 2022	Amount		Ratio		Amount		Ratio		Amount		Ratio
Leverage Capital Ratio:
Tier 1 capital	$	202,438	10.9	%	$	74,039	4.0	%	$	92,549	5.0	%
Risk-based Capital Ratios:
CET1	202,438		18.0		50,551		4.5		73,018		6.5
Tier 1 capital	202,438		18.0		67,402		6.0		89,869		8.0
Total capital	216,446		19.3		89,869		8.0		112,336		10.0

September 30, 2021
Leverage Capital Ratio:
Tier 1 capital	$	188,512	10.7	%	$	70,240	4.0	%	$	87,801	5.0	%
Risk-based Capital Ratios:
CET1	188,512		20.6		41,257		4.5		59,593		6.5
Tier 1 capital	188,512		20.6		55,009		6.0		73,345		8.0
Total capital	200,002		21.8		73,345		8.0		91,682		10.0

The following table presents for informational purposes the regulatory capital ratios for Timberland Bancorp at September 30, 2022 and 2021 assuming that Timberland Bancorp was subject to regulatory guidelines for bank holding companies with $3.0 billion or more in assets (dollars in thousands):

	2022				2021
	Amount		Ratio		Amount		Ratio
Leverage Capital Ratio:
Tier 1 capital	$	204,659	11.0	%	$	191,973	11.0	%
Risk-based Capital Ratios:
CET1	204,659		18.2		191,973		20.9
Tier 1 capital	204,659		18.2		191,973		20.9
Total capital	218,667		19.5		203,475		22.2