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Accounting
Perpetual Inventory System
A system that updates inventory records instantly every time you buy or sell something.
Perpetual systems use scanners and software so you always know exactly how much stock you have. It's more accurate and helps stop theft or stockouts, but it costs more to set up than the old periodic system.It's like your phone's step counter that updates your total steps in real time instead of waiting until the end of the day.
Real world: When Walmart sells a pair of headphones at the register, the computer instantly subtracts one from inventory and shows the exact number left in the warehouse.
💡 Most modern stores use perpetual inventory because it gives you real-time numbers — no more surprise 'we're out of stock' moments.