Average Stock Retention Period Ratio

True Tamplin

Written by True Tamplin, BSc, CEPF®
Updated on August 25, 2021

Average stock retention period ratio provides another way of looking at average stock and rate of stock turn. This is calculated to show the period, in weeks or months, for which stock remains with a business before it is sold off. Obviously, if the rate of stock turn is high, average stock retention period must be low, and vice versa.
Average stock retention period is calculated as follows if the answer is sought in weeks:
Average stock retention period
In case of manufacturing business, average stock retention period is calculated for each class of stocks.
Average stock retention period for raw material is calculated as follows:
Average stock retention period
Average stock retention period for work in progress is calculated as follows:
Average stock retention period for finished goods is calculated as follows:


The following information relates to ABC trading company:

Calculate and interpret average stock retention period of ABC trading company.


Average stock retention period = (Average stock/Cost of goods sold)×12
= (600,000/3,600,000)×12
= 2 months
An average stock period of 2 months is quite high for a trading concern. However, we have to consider the particular type of business or goods that the ABC company trades in, and to know the industry norm before passing a judgement on efficiency or otherwise of this ratio.

True Tamplin, BSc, CEPF®

About the Author
True Tamplin, BSc, CEPF®

True Tamplin is a published author, public speaker, CEO of UpDigital, and founder of Finance Strategists.

True contributes to his own finance dictionary, Finance Strategists, and has spoken to various financial communities such as the CFA Institute, as well as university students like his Alma mater, Biola University, where he received a bachelor of science in business and data analytics.

To learn more about True, visit his personal website, view his author profile on Amazon, his interview on CBS, or check out his speaker profile on the CFA Institute website.

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