The reports that matter most depend on what decisions you need to make. But there are a handful that every online seller should be reviewing regularly.

Your profit and loss statement is the primary view of whether you’re actually making money. For e-commerce, the P&L needs to show cost of goods sold clearly because margins are everything. You should be able to see revenue by channel if you sell on multiple platforms, and you need to understand your gross margin before platform fees, shipping costs, and marketing spend eat into it. A P&L that just shows total sales and total expenses isn’t useful. You need the detail to see where money is actually going.

The cash flow statement is equally important and often overlooked. E-commerce businesses often look profitable on paper while struggling with cash. That’s usually because inventory ties up money before you sell it. The cash flow statement shows whether cash is actually coming in faster than it’s going out. This becomes critical when you’re scaling. Growing inventory to meet demand can drain cash even when sales are strong.

Inventory reports are essential for any product-based business. You need an inventory valuation report to know how much cash is sitting in stock and an aging report to see which products are moving versus sitting. Products that don’t sell tie up cash and may end up discounted or written off. The valuation also matters for your balance sheet and tax return. If it’s wrong, your cost of goods sold is wrong, which means your reported profit is wrong.

Gross margin by product or category tells you which SKUs actually make money. Some products look like winners on revenue but barely break even after product cost, shipping, and fees. Others sell slowly but carry strong margins. Without this report, you’re guessing which products drive profit and which ones just drive volume.

If you sell on multiple platforms, you need sales broken out by channel. Amazon, Shopify, Etsy, and wholesale all have different fee structures and margin profiles. What looks like growth might just be shifting sales to a lower-margin channel. This also helps with inventory planning and marketing allocation.

Most of these reports come from your accounting software, but they only work if your books are set up correctly. Chart of accounts needs to capture the right categories. Transactions need to be categorized consistently. If you’re working with an Andover, MA payroll service or bookkeeper who understands e-commerce, they should be configuring your system to produce these reports without manual work every month.

The goal is getting to a point where you can pull these reports in a few clicks and actually trust the numbers. That’s when the reports become useful for running the business instead of just checking a box.