Amazon FBA inventory forecasting
Sellerside forecasts demand for each of your Amazon FBA products from your real sales velocity, so you can see stockout and overstock risk before it reaches your margin.

The problem: stock decisions made in spreadsheets
Most FBA sellers rebuild their reorder plan by hand: exporting Seller Central reports, pasting them into a spreadsheet and guessing how fast each SKU will sell. The result is either a stockout that kills ranking and sales, or overstock that ties up cash and triggers FBA storage fees.
How Sellerside forecasting works
- Your Amazon Seller Central data is synchronised and cleaned automatically through the official SP-API connection.
- Demand is projected per product from its actual purchase velocity.
- Current stock levels are monitored so you can see how many days of cover remain.
- Units at risk of stockout or overstock are translated into money: lost margin, tied-up cash or avoidable storage fees.
- You know when to reorder, and the forecast feeds directly into your purchase orders.
What you get
- One view of stock and forecast across your marketplaces, organised in a hierarchical catalogue view.
- Reorder decisions tied to real margin rather than warehouse guesswork.
- Less time spent cross-referencing exports.
Limits to keep in mind
- A forecast is a projection based on past sales: promotions, seasonality changes or a new competitor can make actual demand differ.
- New products with little sales history give less reliable forecasts.
- Sellerside informs your decision; you stay in control of what you order.
Frequently asked questions
Related features
Purchase orders
Sellerside helps you buy the right quantity at the right cost: every purchase order is sized against real margin and supplier lead times.
Profitability & P&LSellerside reconciles your Amazon orders, fees, advertising, refunds and product costs into a P&L updated daily, so you know what each product really earns.
