Amazon seller guide
Amazon Inventory Planning: Avoid Stock-outs Without Overstocking
Running out of stock on a best seller costs more than the lost sales: ranking drops, ad campaigns stop learning, and competitors take your place. Overstocking ties up cash and adds storage fees. Good planning balances both.
Know your numbers
- Sales velocity – average units sold per day over the last 30 days (exclude stock-out days).
- Lead time – days from placing a production or purchase order to stock being sellable (include FBA inbound time).
- Safety stock – extra units for demand spikes and delays.
The reorder formula
Reorder point = daily velocity × lead time + safety stock. When available stock reaches this number, reorder. For a product selling 10 units a day with a 20-day lead time and 50 units of safety stock, reorder at 250 units.
FBA-specific planning
Amazon sets capacity or restock limits for FBA. Plan inbound shipments in smaller, regular batches, and keep a backup Easy Ship offer from your own warehouse so the listing never goes out of stock.
Selling on several marketplaces
If the same stock is listed on Amazon, Flipkart, Meesho and others, sync quantities at least daily, or use an inventory tool. Overselling leads to cancellations, which damage account health on every platform.
Seasonality
Festive season, winter wear, school season and wedding season change velocity sharply. Use last year's data for the same weeks and start production early.
Calculating velocity correctly
Do not average over days you were out of stock – that understates demand. Use days when the product was available, and adjust for promotions and sale events, which inflate short-term sales.
ABC classification
Classify SKUs into A (top sellers, most of revenue), B (steady) and C (slow). Keep the most safety stock and closest monitoring on A items, moderate on B, and minimal on C. Consider discontinuing C items that tie up cash without contributing profit.
Working with suppliers and production
Agree on lead times in writing, ask for partial shipments for urgent sizes, and keep a second supplier for critical materials where possible. For in-house production, plan cutting and stitching by the sizes that sell, not equal quantities of every size.
Dead stock clearance
Clear slow stock before it ages: bundle it with best sellers, run a coupon, list it on value marketplaces such as Meesho, or offer it to wholesalers. Long-term storage on FBA becomes costly – remove or liquidate stock that will not sell soon.
Checklist
- Velocity calculated per SKU
- Lead times recorded
- Reorder points set
- FBA inbound schedule
- Daily stock sync across channels
Free tools for Amazon sellers
The Amazon label crop with SKU stamping on LabelCroppers crops Easy Ship and Self Ship labels to 4×6, reads the SKU and quantity from each invoice and prints them on the label, sorts orders by SKU and builds a picklist. Pair it with the FBA FNSKU sticker generator and the FBA box label tool for FBA shipments. Everything runs in your browser – your orders and customer data are never uploaded.
Frequently asked questions
How much safety stock should I keep?
Enough to cover typical delays and spikes – often one to two weeks of sales for best sellers.
What happens to ranking after a stock-out?
Rank often drops and takes time to recover, which is why best sellers should never run out.
Marketplace fees and policies change often. Always confirm current rules in your seller panel.