How To Keep Track Of Inventory

Why Inventory Tracking Breaks Down in Growing Operations

Most small distributors start with the same setup: an accounting package for financials, a spreadsheet for stock counts, printed pick sheets on the floor, and email threads filling every gap in between. That patchwork works fine at 20 orders a week. At 200, it starts to crack. Stock counts go stale between updates. Someone ships from a bin that was already empty. The spreadsheet and the accounting package disagree, and nobody knows which one to trust.

This article is a practical guide to fixing that breakdown. The goal is not to replace what works. It is to close the gaps that cost you money.

What Keeping Track of Inventory Actually Means

Inventory tracking means knowing what you have, where it is, and how fast it moves. That sounds simple. In practice it covers two different things: counting stock that is sitting still, and managing stock that is in motion, meaning receiving, picking, shipping, and returns.

Tracking is a process, not a spreadsheet or a software license. The tools support the process. Without a clear process, even expensive software produces bad data. As GS1 explains when describing the barcode standards that underpin scan-based counts, consistent spotting of every item is the foundation any reliable tracking system builds on.

What Are the Core Methods for Tracking Inventory?

The 3 main methods are periodic counting, perpetual tracking, and cycle counting. Each one fits a different stage of growth. Most small distributors start with periodic counting and move toward perpetual tracking as order volume climbs.

Periodic Counting: Simple but Limited

Periodic counting means your staff count everything on a set schedule, then update the records. Weekly, monthly, or quarterly are common intervals. Stock levels are only accurate right after the count. Between counts, any receipt or shipment creates a gap between the records and reality. This method works for very small operations with slow-moving SKUs and low order volume. If you ship fewer than 30 orders a week and carry under 100 SKUs, periodic counting may be enough for now.

Perpetual Tracking: Real-Time Accuracy

Perpetual inventory tracking updates the count automatically every time a receipt, pick, or shipment is recorded. The system reflects what is actually in the warehouse right now, not what was there last Friday. That real-time view matters most when you are filling orders across many SKUs and more than 1 location. A picker who can see live stock levels before pulling an item avoids the empty-bin problem that triggers refunds and apology calls. Perpetual tracking needs a system that captures transactions as they happen, not at the end of the day.

Cycle Counting: The Practical Middle Ground

Cycle counting means counting a rotating subset of SKUs every day or week instead of shutting the warehouse down for a full physical count. Errors surface early, before a wrong count drives a bad shipment. Operations keep running while the count happens. Cycle counting works best when paired with a system that flags discrepancies automatically, so your team investigates a mismatch the same day it appears rather than discovering it at year-end.

The Information Every Inventory Record Needs

Every useful inventory record should carry at least these fields:

• SKU or item number so every record points to exactly one product
• Description, including unit of measure, so pickers pull the right quantity
• Quantity on hand, updated at every transaction
• Location or bin number so the picker goes to the right spot
• Reorder point, the quantity at which a new buy order should go out
• Supplier name and lead time so reorders happen before stock runs out

Incomplete records cause picking errors and over-ordering. A record missing the bin number sends a picker on a search. A record missing the reorder point means someone discovers a stockout only when a customer calls. Consistent data entry across the whole team matters as much as the fields themselves. One person abbreviating a unit of measure differently breaks every report that depends on it.

Where Your Accounting Software Fits and Where It Falls Short

Your accounting software handles the financial side of inventory well. It tracks cost of goods sold, manages buy orders, and records vendor bills. The IRS needs every business to value its inventory at the start and end of each tax year, and as IRS Publication 538 states: "To figure taxable income, you must value your inventory at the beginning and end of each tax year." Your accounting software satisfies that requirement cleanly.

Where it falls short is the warehouse floor. Your accounting software does not track inventory by bin location. It does not support barcode scanning at receiving or picking. It does not give a picker a real-time view of stock across multiple storage areas. It does not manage a pick-pack-ship workflow. These are not bugs; they are simply outside the scope of an accounting package. The gap is real, and it is worth filling.

How Can a Distributor Improve Inventory Accuracy Without Replacing Their Accounting Software?

The answer is to add an working layer that handles warehouse transactions and feeds clean data back to your accounting package. Your accounting setup stays exactly as it is. The working layer handles the work your accounting software was never designed to do.

That layer covers receiving and put-away, pick confirmation, cycle counts, and reorder alerts. Every transaction records in real time. When an order ships, the count drops. When a buy order is received, the count rises. Your accounting software sees the financial result without anyone re-entering data by hand. Your warehouse team gets real-time visibility. Your accountant gets clean numbers. Neither team has to change the tools they already know. For more on how this works in practice, see how a warehouse inventory platform integrates with your accounting software to keep both systems in sync.

Signs Your Current Tracking Method Is Costing You Money

Operations managers often know the system is failing before they can put a number on it. These signs each carry a measurable cost:

• Shipping the wrong item triggers a return, a replacement shipment, and a refund. The FTC's Mail and Telephone Order Rule needs you to ship when promised, and a bad count makes that impossible to guarantee.
• Discovering a stockout only when a customer calls means the lost order was never flagged internally. That is revenue that left quietly.
• Counting the same item twice during a physical count is a sign the count process itself is not controlled.
• Staff spending hours reconciling a spreadsheet to the accounting package is pure overhead. At the BLS median wage for stock clerks and order fillers, 3 people spending 4 hours a week on manual matching costs roughly $17,000 a year in labor alone, before you count errors those matchings miss.

Each sign is also evidence you can use to build an internal case for fixing the system.

Getting Started: A Practical First Step

Before you touch any software, map your current inventory process on paper. Follow a single order from the moment a buy order goes out to the moment the shipment leaves the dock. Write down every step.

Then mark the points where data is lost or re-entered by hand. Most operations find 3 or 4 of them: a receiving count that gets written on paper and typed in later, a pick sheet that never makes it back to update the spreadsheet, a return that gets put back on the shelf without a record. Those gaps are where your count goes wrong.

That audit is the foundation for any fix, whether you adjust your current process, build a custom working layer, or explore replacing Excel-based inventory tracking with a custom system. You cannot close a gap you have not named. Start there, and the right next step becomes clear.

The US Census Bureau's Monthly Wholesale Trade data tracks the inventories-to-sales ratio across wholesale firms nationally, a useful benchmark for whether your stock levels are in line with your peers. The NIST Manufacturing Extension Partnership offers vendor-neutral guidance on supply chain process for small and mid-size manufacturers and distributors.

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