Inventory Obsolescence Reserve Ratio Calculator

Use one entity, currency, reporting period, and documented accounting policy across every input. Reserve and gross inventory share one reporting date and scope. Gross inventory is measured before deducting this reserve. Reconcile each amount to the same ledger or approved operating report. Mixing gross and net balances, dates, classifications, or acquisition boundaries can produce polished arithmetic that does not represent a coherent measure.

Product lifecycle, demand forecasts, write-offs, commodity prices, and valuation methods can change the ratio across periods. Compare the result with consistently prepared prior periods, plans, and relevant peers rather than applying a universal good-or-bad threshold. Seasonality, product mix, inflation, acquisitions, write-offs, classification changes, and timing can move the measure without reflecting the same underlying economic change.

No. This educational calculator applies disclosed arithmetic to values you supply; it is not an audit, forecast, valuation, accounting conclusion, credit decision, or investment recommendation. Reserve adequacy requires SKU-level aging, demand, disposal, recovery, and accounting-policy evidence. Retain source records, document adjustments, test alternative assumptions, and obtain qualified review before using the result in reporting or approval workflows.