TL;DR
COGS tracking is the systematic capture of cost of goods sold at SKU, order, and channel level — including landed cost, fulfillment, and variable allocations. Brands with sub-product-level COGS tracking find 4-8% margin lift on average by surfacing loss-making SKUs and over-allocated overhead (Saras Analytics 2025).
What is COGS tracking?
COGS tracking is the systematic recording and allocation of cost of goods sold at the granularity needed for operating decisions — typically at SKU, order, and channel level. It goes beyond the headline COGS line on the income statement by capturing landed product cost, fulfillment cost per order, payment processing, returns reserve, and variable channel costs.
For ecommerce brands, COGS tracking is the foundation of true contribution margin measurement. Without per-SKU and per-channel COGS, profitability decisions rely on aggregated averages that hide which products and channels actually make money.
Why COGS tracking matters
Aggregated COGS averages hide the dispersion: in a typical D2C portfolio, 20-30% of SKUs are loss-making and 30-40% generate the bulk of profit. Without per-SKU COGS, brands continue advertising loss-makers and under-investing in winners. Saras Analytics' 2025 ecommerce profitability study shows brands that move from blended to SKU-level COGS find 4-8% margin lift within 90 days, purely from reallocation.
For finance, COGS tracking is the input to first-order profitability, SKU profitability, and channel-level CM2. For ops, it's the basis for inventory planning, supplier negotiation, and price changes.
What to track
- Landed product cost per unit. Manufacturer cost + freight + import duties + insurance — the full cost to get the unit into the warehouse.
- Fulfillment cost per order. 3PL pick-pack + packaging + outbound shipping (zone-weighted).
- Payment processing per transaction. 2.5-3.5% varies by tier and method.
- Returns reserve. Return rate × per-return handling + restock cost + lost margin.
- Variable channel allocations. Marketplace commissions (Amazon 8-15%, eBay 12-15%), retail-media fees, customer-service touches.
Common mistakes
- Updating COGS only at year-end. Manufacturer prices, freight rates, and 3PL fees change monthly. Quarterly COGS updates are the floor; monthly is best-in-class.
- Treating headline gross margin as truth. A 65% headline margin can hide a portfolio where 30% of SKUs run negative CM after returns and fulfillment. Compute at SKU level.
- Missing the returns reserve. Apparel brands with 20%+ return rates that don't reserve for returns systematically overstate margin by 8-15 points.
- Allocating overhead to COGS. Fixed costs (rent, HQ headcount) don't belong in COGS. Variable per-unit and per-order costs do.
Related metrics
COGS tracking feeds COGS, gross margin, contribution margin, CM1, CM2, CM3, first-order profitability, SKU profitability, landed COGS, return rate, and return margin impact.
At a glance
- Category
- Profit Intelligence
- Related
- 5 terms
Frequently asked questions
What is COGS tracking?
COGS tracking is the systematic capture of cost of goods sold at SKU, order, and channel level — including landed product cost, fulfillment, payment processing, returns reserve, and variable channel allocations. It is the input to true contribution-margin measurement.
Why is SKU-level COGS important?
Aggregated COGS averages hide dispersion. In a typical D2C portfolio, 20-30% of SKUs are loss-making and brands continue advertising them. SKU-level COGS surfaces this immediately and typically produces 4-8% margin lift within 90 days from reallocation.
How often should COGS be updated?
Monthly is best-in-class; quarterly is the floor. Manufacturer prices, freight rates, 3PL fees, and payment-processing tiers all change frequently — annual-only COGS updates produce 6-18 months of stale margin reporting.
What costs belong in COGS vs. operating expense?
COGS = variable, per-unit, or per-order costs of producing and delivering the product. Operating expense = fixed costs (rent, HQ headcount, marketing). Common error: allocating overhead into COGS, which depresses headline gross margin and corrupts SKU profitability comparisons.
Sources
- Saras Analytics. eCommerce Profitability Study 2025, 2025. sarasanalytics.com
- Eightx. Landed Cost and Contribution Margin Tracking, 2025. eightx.co
- Klar. SKU-Level Profitability for D2C, 2025. help.getklar.com
Fairview ingests landed COGS, 3PL, and processing data to produce SKU-level CM1, CM2, and CM3 — see the operating intelligence overview for the broader category.
Definitions and benchmarks reviewed by Siddharth Gangal, Founder, Fairview.
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