Resources
Cost of goods sold and the records behind gross profit
Cost of goods sold explains the cost assigned to merchandise sold during a period. Reconcile purchases and inventory before using gross profit to judge pricing or business performance.
This guide describes common bookkeeping practice, not a legal or regulatory requirement.
Last reviewed:
General information, not legal or tax advice.
Start with goods available for sale
IRS guidance combines beginning inventory with purchases and applicable production costs, then subtracts ending inventory. Keep the count date aligned with the reporting period. A purchase invoice alone does not tell you whether an item was sold or remains on the shelf.
Sources: IRS Pub 334 (for 2025 returns)
Keep purchase adjustments with the invoice
Publication 538 defines purchased merchandise cost as invoice price less appropriate discounts plus transportation and other acquisition charges. Review credits and freight with the related purchase. Recording a discount elsewhere can leave the inventory value disconnected from the actual acquisition cost.
Sources: IRS Pub 538
Follow the bridge to gross profit
Publication 334 subtracts returns and allowances from gross receipts to obtain net receipts, then subtracts cost of goods sold to obtain gross profit. Trace each part of that bridge to its ledger accounts. An unusual margin is a reason to review classifications and counts, not proof of a pricing problem.
Sources: IRS Pub 334 (for 2025 returns)
Distinguish merchandise costs from service activity
The IRS says a service business need not calculate cost of goods sold when merchandise sales are not an income-producing factor. Contractors may use practical cost-of-sales groupings for job analysis, but tax mapping needs CPA review. Label management reporting categories clearly and avoid importing unsupported industry margin targets.
Sources: IRS Pub 334 (for 2025 returns)
Sources: start with goods available for sale
Make product costs easier to follow
Tidwell helps reconcile the books and organize supporting schedules for your business decisions. We work with your CPA on tax questions and the financial records they need.