Dictionary / Cost of Sales
What does Cost of Sales mean in accounting?
Quick definition
Accounts payable & receivableThe total cost of goods sold during a given accounting period, determined by ascertaining, for each item of sale, the invoice and such other costs pertaining to the item as may have been included in the cost of goods purchased. This term guides how bookkeepers record, classify, and explain related transactions in routine financial reporting.
Read more below

Examples
Sold pairs carry invoice plus inbound freight
You run a running store. On June 6, a shoe supplier invoices 24 pairs of trail shoes at $70 each ($1,680), and a freight carrier bills $96 of inbound freight, so each pair's purchased cost is $74. On June 21 you sell 9 pairs; cost of sales for those pairs is $666 (9 × $74), and the other 15 stay in inventory at $1,110. In QuickBooks Online or Xero, add the freight bill to the item cost so the sale pulls $74, not the $70 invoice alone. Watch that June cost of sales is $666, not the $1,776 inbound total and not $630 of invoice-only cost.
A restock is not this month's cost of sales
You run a kitchenware shop. On October 2, a kitchenware supplier bills $3,410 for a pallet of hotel pans, and a freight carrier bills $190 to deliver them, so cost of goods purchased is $3,600. You code both bills to Cost of Sales because the goods are for resale. Your October 31 count still shows most of the pallet on the rack; only $720 of those pans went out on customer invoices. Recode the bills to inventory and let cost of sales pick up only the $720 that sold. The rest of the inbound total stays on the balance sheet until those pans leave.
Why it matters
Cost of sales is the purchased cost of goods you actually sold in the accounting period: each item's vendor invoice plus the inbound extras already included in that item's cost of goods purchased. You will see this line every close if you sell stock, either as items ship or when you compute it from beginning inventory, purchases, and a count; a service business with no goods almost never posts it. Treat the inbound total as this line and a buying month looks worse than it is while unsold units disappear from the balance sheet; leave sold goods in inventory and gross profit is overstated. Watch that the P&L amount is the landed cost of units that left, not the catalog invoice alone and not the whole incoming shipment.
Keep learning
Start with the bookkeeping basics, then compare software when you are ready to pick a tool.
Getting startedBookkeeping basics for small-business ownersWhat bookkeeping is, the records you need, double-entry in plain English, and a monthly rhythm that fits a 1–50 person shop.Updated October 4, 2026
RolesWhat does a bookkeeper do?A bookkeeper records bills, invoices, and bank activity so your books stay current. See the weekly work, the month-end close, and what they do not do.Updated August 18, 2026
Monthly closeMonthly bookkeeping: what to close each monthMonth-end is the job: reconcile banks and cards, age bills and invoices, check payroll, then read the reports. A close checklist for small-business owners.Updated August 18, 2026
Travel and Expense ManagementThe 8 Best Travel and Expense Management Tools for BusinessWe ranked 8 travel and expense tools for business on cards, AI policy checks, and mobile receipt capture, with pricing and honest tradeoffs.Updated August 24, 2026Frequently asked questions
What is Cost of Sales in bookkeeping?
The total cost of goods sold during a given accounting period, determined by ascertaining, for each item of sale, the invoice and such other costs pertaining to the item as may have been included in the cost of goods purchased.
When should I use Cost of Sales?
Use Cost of Sales when the transaction facts match its definition and you need the ledger and financial statements to reflect the correct account and period.
What is a common mistake with Cost of Sales?
Cost of Sales is used for cost of sales entries, while C&F covers a related but distinct bookkeeping purpose. Review both terms before posting unusual transactions. A common mistake is applying it by label only instead of checking the underlying transaction details.