CostLedger ‑ COGS & Margins

Track your true cost of goods per purchase order. Margin reports survive supplier price changes.

Shopify stores one cost per variant — a single current value, no history. Update it when a supplier price changes and you lose what you paid before, with no per-batch or per-supplier trail. CostLedger keeps a time-stamped ledger of every batch instead: each variant gets a moving-average cost timeline with the math shown in the app. Margin reports value each sale at the cost basis from its sale date, so margins reflect what each unit really cost. Alerts flag batches that squeeze your margin.

• Per-purchase-order cost ledger with quick manual entry and CSV import
• Cost timeline per variant showing the moving-average math at every step
• 30 and 60 day margin reports valued at the cost basis on each sale date
• Margin-squeeze alerts by email or Slack when a new batch costs more
• CSV export of the full ledger and margin reports for your accountant