Inventory Management — Track Stock, COGS & Pricing Across Every Channel
No More Spreadsheet Chaos
Three 2026 policy changes make inventory management harder than ever. Amazon discontinued FBA prep on January 1 — you're now responsible for labeling and prep. Commingling ends March 31 — every unit needs your FNSKU label, no more shared pools. FBA fees increased $0.08–$0.31/unit in January. Together, these changes mean higher costs per unit, zero tolerance for mislabeled inventory, and tighter margins that require precise COGS tracking. If you're still managing inventory in spreadsheets, you're flying blind.
2026 Inventory Challenges for Resellers
Amazon policy changes in early 2026 require immediate action. Understand the challenge. Get ahead.
FBA Prep Discontinued (Jan 1, 2026)
Amazon no longer labels, poly-bags, or preps your inventory. You need a 3PL or handle prep yourself. Ecom Circles integrates with warehouse services for FBA prep, so you upload inventory and it's ready for shipment.
Commingling Ending (March 31, 2026)
Stickerless/shared inventory pools are gone. Every unit needs YOUR FNSKU. If you don't track which units are labeled, you'll get stranded inventory locked at FBA. Ecom Circles flags unlabeled units before the deadline.
FBA Fee Increases (Jan 2026)
Storage fees are now $0.78/cu ft standard, $2.40/cu ft peak. Returns processing fee added. COGS tracking must include these costs or your margin calculations are wrong. Ecom Circles includes all 2026 rates.
Multi-Channel Overselling
Sell 50 units on Amazon AND Walmart without inventory sync, and both can sell simultaneously. Overselling causes penalties, cancelled orders, and lost trust. Automatic sync prevents this entirely.
Complete Inventory Management Suite
Eight essential features built for multi-channel sellers managing FBA, FBM, Walmart, and Mirakl.
Multi-Channel Stock Tracking
Track inventory across Amazon (FBA + FBM), Walmart (WFS + seller-fulfilled), and Mirakl. One SKU, multiple channels, automatic sync.
COGS & True Profitability
Track cost basis per SKU including wholesale price, shipping, prep costs, and FBA fees. Know your true margin before you list.
Bulk Editing & Alerts
Edit 500+ SKUs in one operation. Filter by supplier, category, margin, or velocity. Set min/max thresholds and get alerts when inventory drops.
Learn More →3PL & Warehouse Sync
Connect to your 3PL or Ecom Circles' warehouse. When stock arrives, inventory syncs automatically across all channels.
MAP Enforcement
Set Minimum Advertised Price per product. Blocks repricing below MAP automatically. Essential for brand-authorized wholesale.
FBA Shipment Planning
Calculate how many units to send to FBA based on velocity, storage costs, and restock limits. Avoid long-term storage fees.
Stranded Inventory Detection
Flags inventory at FBA that isn't linked to an active listing. With commingling ending, stranded inventory risk is critical.
FNSKU Label Tracking
Track labeled vs. unlabeled inventory before the March 31, 2026 commingling deadline. Prevents stranded inventory at FBA.
Inventory in Your Workflow
Inventory management is the hub of your operation. Sync with orders to prevent overselling across channels, then reprice by inventory level to optimize pricing based on stock. Coordinate with inventory in management services to track FBA prep and fulfillment compliance.
For warehouse and dropshipping operations, warehouse inventory tracking ensures your 3PL stock levels stay synchronized, and track dropshipped inventory across your fulfillment pipeline.
Why Inventory Management Matters
Wholesale Seller with 3 Suppliers
Each supplier uses different SKU formats. Without centralized inventory, you're reconciling 3 spreadsheets daily. One mistake and your supplier costs are wrong.
Multi-Channel Seller (Amazon + Walmart)
Walmart's algorithm deprioritizes listings that go out of stock. One stockout costs you weeks of organic ranking recovery. Automatic sync keeps both channels in stock.
RA Seller Scaling Past 500 SKUs
At this volume, manual COGS tracking breaks. You think you're making 25% margins but after FBA fees, storage, and prep costs, you're at 8%. Ecom Circles shows the true number.
Ecom Circles vs. Spreadsheets
vs. Spreadsheets
No automatic sync. Error-prone. Can't handle multi-channel. No alerts. Manual updates kill productivity.
vs. Forecast-Only Tools
Some tools focus only on forecasting and planning inventory buys. Ecom Circles is built for resellers managing COGS and multi-channel sync across Amazon, Walmart, and Mirakl — the operational layer you need daily.
Real-World Impact
Multi-channel sellers using Ecom Circles inventory management report:
- ✓Zero overselling incidents — Inventory syncs automatically across all channels
- ✓5–10 hours/week saved — No more manual inventory updates across spreadsheets
- ✓2–3% margin improvement — COGS tracking prevents underpricing
- ✓Faster 3PL coordination — Warehouse syncs automatically, no daily calls
- ✓Smooth 2026 transition — Ecom Circles inventory management helps you track FNSKU labeling status and flag units that need attention before the March 31 commingling deadline
$1.7B+ in total sales volume processed. 5.15M listings managed. 7,174+ seller signups since 2020.
Common Questions
Stop Managing Inventory in Spreadsheets
Track stock, COGS, and pricing across all your channels. One system. Automatic sync. Perfect accuracy.