Inventory Management & Restocking
Monitor your stock levels in real-time across all marketplaces. Get instant alerts before products run out and never lose a sale due to stock-outs again.
What Does a Stock-Out Really Cost You on Amazon?
For an Amazon seller, managing inventory means balancing availability and demand. Running out of stock triggers a cascade of problems. The opposite is just as dangerous: excess inventory ties up capital and leads to steep FBA long-term storage fees.
Stock-Outs Kill Momentum
Customers don’t wait: they buy from competitors. You lose the Buy Box immediately, and it can take 2+ weeks to recover your organic ranking. Late reorders mean days of zero sales, lost orders, and a ranking hit that compounds over time.
Overstock Drains Capital
Too many units of slow-moving products generate Amazon’s long-term storage fees and tie up capital that could be invested in bestsellers. Constant stock-level monitoring with alerts before critical products run out keeps overstock under control.
SellerMagnet helps you prevent both problems with proactive, automated inventory monitoring.
* Figures are realistic estimates based on data from our users. Individual results may vary.
- Manual checks in Seller Central
- No alerts: stock-outs noticed too late
- One marketplace at a time
- Automatic sync every few minutes
- Smart alerts before stock-outs
- All marketplaces, one view
What Do You Need to Manage Amazon Inventory?
From real-time monitoring to intelligent alerts, SellerMagnet gives you complete control over your Amazon inventory.
Real-Time Stock Levels
See exactly how many units you have for each SKU across all Amazon marketplaces. Data syncs automatically every few minutes.
Low-Stock Alerts
Get instant notifications when products drop below your custom thresholds. Never be caught off guard by a stock-out again.
Phone Stand Holder: 12 units left (3 days coverage). Reorder now!
Days of Coverage
See exactly how many days of coverage you have left based on current sales velocity. Plan reorders with precision.
Multi-Marketplace View
Monitor inventory across Amazon US, UK, DE, FR, IT, ES, and more. All from a single unified dashboard.
Multi-Account Support
Managing multiple seller accounts? See all your inventory in one place. Perfect for agencies and large sellers.
Export Reports
Download inventory data as CSV or JSON. Share with your team, import into spreadsheets, or use for advanced analysis.
WH-PRO,Wireless Headphones,247,32,OK
USB-C,Charging Cable,184,24,OK
STAND,Phone Stand,12,3,⚠ Low
Inventory Control in 3 Simple Steps
Connect your Amazon accounts, configure your alert thresholds, and let SellerMagnet monitor every SKU in real time. The entire setup takes under five minutes.
Instead of manually checking stock levels across multiple marketplaces, SellerMagnet consolidates everything into one dashboard with automated alerts, days-of-coverage forecasts, and smart reorder recommendations.
1 Connect Your Accounts
2 Set Your Thresholds
3 Stay Informed & Reorder Smart
Amazon US
Connected · Syncing 1,247 SKUs
Amazon DE
Connected · Syncing 893 SKUs
Amazon UK
Connecting… importing inventory
How Do You Calculate the Right Reorder Point?
Efficient restocking is driven by data and forecasts, not guesswork. SellerMagnet helps you calculate the optimal reorder point for every SKU.
How Reorder Points Work
A reorder point is calculated by combining your daily sales velocity with your supplier lead time, plus a safety stock buffer to cover demand spikes or shipping delays. The formula is straightforward:
Reorder Point = (Daily Sales Velocity × Lead Time in Days) + Safety Stock
Real-World Example
A reseller sells 10 units/day of a product. They have 100 units in stock and their supplier needs 15 days to deliver. With a 20% safety stock buffer, the reorder point is (10 × 15) + 30 = 180 units. Since current stock (100) is already below the reorder point, they should place the order immediately to avoid a stock-out. SellerMagnet calculates this automatically and sends an alert.
Sell-Through Rate Tracking
Monitor the sell-through rate of every product to adapt reorders: increase for bestsellers, reduce or liquidate slow-movers.
Seasonal & Event Planning
Plan 30–60 days of future sales coverage. Increase reorders by 20% on top products during Prime Day to prevent stock-outs.
Safety Stock Buffer
Cover sudden demand spikes or supplier delays. Never run dry during high-demand periods, avoid excess during slow periods.
Slow-Mover Liquidation
Identify slow sellers and reduce orders, or liquidate to free up capital and storage space.
Built for every type of seller
Whether you’re a solo reseller, a brand owner, or an agency managing dozens of accounts, SellerMagnet’s inventory tools scale with your needs.
FBA/FBM Resellers
Track inventory across multiple product categories. Get alerts before bestsellers run out so you reorder in time.
- Track supplier lead times per SKU
- Avoid missed sales from stock-outs
- Monitor sell-through rate per product
Brand Owners
Maintain consistent availability for your branded products. Never let customers find your listings “out of stock.”
- Protect brand reputation with stock continuity
- Plan production cycles from sales velocity
- Forecast days of coverage per marketplace
Agencies
Manage inventory for multiple clients from one dashboard. Export reports for each account to share with clients.
- Multi-account dashboard across all clients
- Marketplace performance compared at scale
- Export client-ready reports CSV/JSON
Free for accounts under 50 orders/month · CC required
Integrated with Analytics Dashboard
Inventory Management isn’t a standalone tool. It’s part of SellerMagnet’s comprehensive Analytics Dashboard. See your stock levels alongside real-time profits, sales analytics, and cost breakdowns.
Through the Profit & Inventory Dashboard, you can see at a glance how many units remain for each SKU across every Amazon marketplace (.com, .de, .it, .fr, .co.uk, .es) and the daily sales velocity. The Amazon Alerts module sends instant notifications when a product drops below a preset threshold (e.g., 20% of initial stock), alerting you before a potential stock-out.
Profit Tracking
See exactly how much you’re making on each product
Sales Analytics
Track trends, compare periods, identify opportunities
Amazon Alerts
All your alerts in one place: stock, Buy Box, reviews
Returns & In-Transit Tracking
Track returned units and inventory in transit to FBA centers
Optimize Your Supply Chain to Sell More
Well-managed inventory means you can scale sales without disruptions.
The Bottom Line
Effective inventory management is about staying one step ahead — anticipating demand, timing reorders precisely, and maintaining a smooth, data-driven restocking flow. Sellers who always know what, when, and how much to reorder gain an enormous advantage over less organized competitors. By combining real-time stock monitoring with automated alerts and reorder calculations, you spend less time on spreadsheets and more time growing your business.
Amazon IPI & Storage Limits
Avoiding stock-outs on high-rotation products keeps your Amazon IPI (Inventory Performance Index) high. It’s the metric Amazon uses to evaluate your FBA inventory management. A high IPI score means fewer storage restrictions and lower fees.
SellerMagnet supports these decisions with always up-to-date data: easily identify products approaching stock-out, those in surplus, and even track returns and units in transit to FBA warehouses.
Your IPI Score
Staggered Reorders
Plan reorders in waves instead of bulk shipments. This reduces risk, spreads costs, and ensures continuous availability even when supplier lead times vary.
Pan-European FBA
If you use Amazon’s Pan-European FBA program, transfer inventory between Amazon warehouses to match regional demand. SellerMagnet gives you the visibility to make these decisions.
See it in action before you commit
Explore the full Analytics Dashboard, including Inventory Management, with real sample data. No signup, no credit card, no time limit.
Inventory Management FAQ
Everything you need to know about inventory management on Amazon.
Last updated: March 2026
Written by the SellerMagnet Product Team
Still have questions? Our team is here to help.
Ready to Take Control of
Your Inventory?
Real-world examples of how sellers use Inventory Management:
- 01Get restock alerts before stock-outs. Protect rank and avoid lost sales worth €500+
- 02Detect overstock early and avoid long-term FBA storage fees that erode 5 to 15% of margin
- 03Replace manual spreadsheet tracking with one dashboard. 4 to 6 hours/week saved
* Figures are illustrative examples based on typical seller scenarios. Actual results vary.