The first thing to understand is that inventory is an asset on your balance sheet, not an expense. When you buy product to sell, that purchase doesn’t hit your income statement yet. It sits as inventory until you actually sell it. At that point, the cost of the item moves from inventory to cost of goods sold. Getting this flow right is the foundation of inventory accounting.

Many small business owners skip this entirely and just expense everything when they buy it. That might be simpler, but it distorts your financial picture. If you buy $20,000 in product in January and sell it over three months, expensing it all in January makes that month look terrible and February and March look artificially profitable. Proper inventory tracking gives you accurate monthly profit numbers you can actually use.

You need to pick an inventory costing method. The most common options are FIFO (first in, first out), LIFO (last in, first out), and weighted average cost. FIFO assumes the oldest inventory sells first, which works well for perishable goods or anything where you actually rotate stock. Weighted average smooths out price fluctuations by averaging the cost of all units available. LIFO can offer tax advantages in some situations but isn’t allowed under certain accounting frameworks. Once you pick a method, stick with it. The IRS expects consistency.

Set up your accounting software to handle inventory properly. QuickBooks Online has inventory tracking features that let you create items with cost and selling price, receive inventory against purchase orders, and automatically calculate COGS when you record a sale. Turn these features on from the start. Retrofitting inventory tracking after months of expensing purchases creates cleanup work that could have been avoided.

Physical inventory counts are non-negotiable. Your books might say you have 200 units of something, but theft, damage, spoilage, and counting errors create discrepancies between what the system says and what’s actually on the shelves. Count your inventory at least quarterly. Many businesses do monthly counts for high-value or high-volume items. When the physical count doesn’t match your records, adjust your books and investigate why.

Record shrinkage and damaged goods as they happen instead of waiting for a big adjustment at year end. If product gets damaged or goes missing, write it off promptly. This keeps your inventory value accurate and your COGS realistic throughout the year.

Track inventory by location if you store product in multiple places. Knowing you have 50 units total is less useful than knowing 30 are in your warehouse and 20 are at a retail location. This matters for ordering decisions, insurance purposes, and catching discrepancies faster.

If your business carries significant inventory, the complexity ramps up quickly. Purchase orders, receiving reports, landed costs for shipping and duties, reorder points, and seasonal adjustments all need attention. This is where inventory accounting support pays for itself. The cost of carrying too much inventory or not knowing your true margins is almost always higher than the cost of getting the tracking right.

For businesses in Franklin and Nashville that sell physical products, whether through a storefront, online, or wholesale, having clean inventory records also makes tax time dramatically easier. Your cost of goods sold is a major line item on your tax return, and the IRS pays attention to businesses where inventory numbers don’t add up.

The bottom line is that inventory tracking requires discipline and a system that matches your business complexity. Start with proper software setup, count regularly, reconcile consistently, and choose a costing method that fits your operations. If you’re unsure which method makes sense or how to structure your books around inventory, working with a financial advisor who understands your business will save you from expensive mistakes down the road.