Inventory Shrinkage is the loss of inventory between recorded book stock in the accounting system and actual physical stock counted on shelves. Formula: Net Shrinkage Value = Book Stock Value − Physical Count Stock Value. Shrinkage Rate (% of Sales) = (Net Shrinkage Value ÷ Total Sales Revenue) × 100.

Global and Nepali retail benchmarks classify shrinkage into 4 main root causes: (1) Customer Shoplifting (~36%), (2) Employee Internal Theft (~30%), (3) Administrative & Billing Clerical Errors (~21%), and (4) Vendor Fraud & Transit Damage (~13%).

Shrinkage directly wipes out pure bottom-line profit. For example, if a store operates at a 20% gross margin and loses Rs. 1,00,000 to shrinkage, it must generate Rs. 5,00,000 (Rs. 1,00,000 ÷ 0.20) in extra sales just to break even on the loss without making any net gain.

Under the Nepal Income Tax Act 2058 and VAT Act 2052, unexplained inventory write-offs cannot be claimed as tax-deductible expenses without proper statutory documentation. Business owners must file formal incident reports, police reports (in case of burglary), or insurance claim papers to justify abnormal losses.

ByaparOS features blind intake physical stock audits with barcode scanners, blind shift cash reconciliations, user role permission locks, and tamper-evident activity audit trails for all stock adjustments, pinpointing discrepancies immediately.