The formulas
- Goods available = beginning inventory + net purchases
- Estimated COGS = net sales x (1 - gross margin)
- Estimated ending inventory = goods available - estimated COGS
How it works
The gross profit method estimates inventory without a count. It is used for interim periods, after a fire or theft loss, and as an analytical check on a perpetual record.
The estimate is only as good as the margin. It assumes the mix and pricing of the period resemble history, so shifts in markdowns, shrink or product mix reduce reliability. Keep the margin as a percent of sales, not of cost.
Illustrative figures only. Check the result against your firm's methodology before relying on it.
Common questions
Is it acceptable for annual statements?
It is an estimate. Annual inventory is normally supported by a count or a reliable perpetual record.
Margin on cost or sales?
This tool needs margin on sales. Convert a markup on cost by dividing markup by (1 + markup).
Why does the book differ?
Shrink, cutoff errors, price changes and margin drift can all explain it.
Formulas on this page are the standard definitions.
Runs in your browser. The figures you type are not sent to CORAA or stored. Check the result against your firm's methodology before relying on it.