Related party transactions (Tables)

6 Months Ended

Mar. 31, 2026

Related party transactions

Schedule of relationship and the nature of related party transactions

Name of related party	Relationship to the Company	Nature of transactions
Zhejiang Tantech Bamboo Technology Co., Ltd	Under common control of Mr. Zhengyu Wang and Ms. Yefang Zhang, CEO of the Company	Lease factory building to the Company and charging water and electricity for offices leased to the Company.
Yefang Zhang	Chief Executive Officer of the Company	Payment of expenses for the Company.
Zhengyu Wang	Mr. Zhengyu Wang is Ms. Yefang Zhang's husband	Non-competition agreement
Centurynew USA Inc	CEO Yefang Zhang controls the company.	Payment of expenses for the Company.
Epakia Inc.	A Subsidiary of Tantech Holdings Ltd Group. Yefang Zhang serves as a Chairwoman of the board of directors of Tantech Holdings Ltd	Payment of expenses for the related party

Schedule of due from related parties

				As of				As of
				March 31,				September 30,
				2026				2025
Due from related parties		Name of related parties		(unaudited)				(audited)
Other receivables		Epakia Inc.		$	35,000				-
Total				$	35,000				-

Schedule of due to related parties

				As of				As of
				March 31,				September 30,
				2026				2025
Due to related parties		Name of related parties		(unaudited)				(audited)
Other payable		Centurynew USA Inc		$	3,600,008				-
Other payable		Yefang Zhang			227,773			$	241,773
Other payable		Zhejiang Tantech Bamboo Technology Co., Ltd.			64,232				52,146
Total				$	3,892,013			$	293,919

Schedule of operating lease from related parties

Zhejiang Tantech Bamboo Technology Co., Ltd.		Lease No 1
Lease begin date		March 1, 2023
Lease end date		February 29, 2028
Leasing purpose		Office
Annual rent in RMB			131,835
Annual rent in USD		$	18,817
Area (in square meters)			479