Amazon Order Management in 2026: FBA, MFN Orders and Restocking
Quick answer: Amazon order management is two jobs. For merchant-fulfilled (MFN) orders you handle each one: ship within your handling time, confirm it with valid tracking, answer the buyer and process returns on Amazon's deadlines. For FBA orders, Amazon ships, so your job moves upstream to inventory: staying above 28 days of supply to avoid the low-inventory fee, staying inside your monthly FBA capacity limit and reordering from China early enough to cover the full lead time. Most problems that look like order problems, such as cancellations, lost Prime badges and late deliveries, start as inventory problems.
Where the work sits for each fulfillment type
| Task | FBA orders | Merchant-fulfilled orders |
|---|---|---|
| Pick, pack and ship | Amazon | You or your fulfillment partner |
| Confirm shipment and tracking | Automatic | You, by the ship-by date |
| Customer questions about delivery | Amazon | You |
| Returns | Amazon | You, within Amazon's deadlines |
| Stock levels | You plan, Amazon stores | You plan and store |
| Main metrics | Days of supply, capacity use, aged stock | On-time delivery, valid tracking, late shipments, cancellations |
Not sure which model a product should use? Our FBA vs MFN cost comparison works through the numbers.
Merchant-fulfilled orders: the daily routine
Seller Central's Manage Orders page lists every order with its status. A pending order isn't ready to ship yet. An unshipped order is ready and has a ship-by date. Once you confirm shipment with tracking, the order is shipped. A routine that keeps your metrics safe:
- Pull new orders at a fixed time each day. Export them as a file or connect a tool, and send them to whoever ships them. PackQuay accepts Amazon orders as a CSV or Excel upload.
- Ship within the handling time you set. Since June 29, 2026, each SKU's handling time must reflect how fast you really ship it. If you don't set it, Amazon assigns one from your shipping history.
- Confirm with valid tracking. Amazon wants valid tracking above 95% and late shipments under 4%. Labels bought through Amazon's Buy Shipping upload tracking automatically, and those marked as protected keep carrier delays from counting against your on-time rate.
- Watch on-time delivery. The floor is 90%. Since February 28, 2026, Amazon deactivates the specific listings that drag the rate down.
- Cancel only when you must. Pre-fulfillment cancellations must stay under 2.5%, and most come from selling stock you don't have.
- Handle returns on time. Amazon's prepaid return labels have been mandatory for US seller-fulfilled orders since February 8, 2026. From December 18, 2026, you must provide a prepaid label or a full refund within 7 calendar days of a return request, or Amazon can refund the buyer and charge you.
- Check Account Health weekly, including order defect rate, which must stay under 1%.
FBA orders: manage the stock, not the parcels
With FBA there is nothing to ship, but three numbers decide whether orders keep flowing:
- Days of supply. Amazon charges a low-inventory-level fee per unit shipped when a product's historical days of supply is under 28 days over both the last 30 and the last 90 days. Since January 15, 2026 it is measured per FNSKU, so each variation is judged on its own stock. The column is in Seller Central under FBA Inventory.
- Capacity limit. Amazon sets a monthly FBA capacity limit in cubic feet. Stock on hand, stock in transit and shipments you have created all count, so a big inbound shipment can block the next one.
- Aged stock. Aged-inventory surcharges apply to units stored more than 181 days, and monthly storage costs about three times as much from October to December.
The aim is a band: enough stock to stay above 28 days of supply and never run out, but not so much that it ages past 181 days or fills your capacity. Amazon's Restock Inventory recommendations and the Capacity Monitor in Seller Central help, but they don't know how long your goods take to come from China. You have to add that.
Restocking from China: a worked reorder example
Your reorder point is the FBA stock level at which you must start the next order, so it arrives before you run out:
Reorder point = daily sales × (total lead time in days + safety days)
Total lead time is everything from placing the order to units being available in FBA: production, inspection, prep and labelling, freight, customs and check-in. Use your own figures; they vary by product, factory, shipping mode and season.
Example with illustrative numbers: a product sells 20 units a day, your measured lead time is 60 days and you keep 14 safety days.
- Reorder point: 20 × (60 + 14) = 1,480 units. When FBA stock plus inbound units drops to 1,480, place the next order.
- Low-inventory floor: 20 × 28 = 560 units. Falling below this for long enough starts the fee.
- Order size: if you want each order to cover 60 days of sales, order 20 × 60 = 1,200 units, then check the cartons fit your capacity limit.
If 1,200 units won't fit your capacity, split the order. Keep part of it as a buffer in a warehouse in China, or in Amazon's bulk storage, and send smaller top-ups to FBA. You avoid capacity blocks and big aged-stock risk, and the 28-day floor stays easy to hold. Raise safety days before Prime Day, Q4 and Chinese New Year, when factories close and freight slows.
Running FBA and MFN side by side
- One count, two locations. Track FBA stock and your other warehouse separately, and never list the same unit as available in both.
- Use MFN as a safety net. If FBA stock runs low, a merchant-fulfilled offer from your other stock keeps the listing selling, though without the Prime badge.
- Keep the long tail out of FBA. Slow SKUs often cost less shipped from your own stock than stored at Amazon.
- Bring other channels in. Since September 2026 Amazon has been rolling out Seller Central tools that show eBay, Shopify, TikTok and Walmart orders next to Amazon ones, and FBA stock can fill off-Amazon orders through Multi-Channel Fulfillment.
Weekly order management checklist
- Account Health: on-time delivery, valid tracking, late shipments, cancellations, order defects.
- Days of supply per FNSKU, flagging anything heading toward 28 days.
- Reorder points: has any SKU's stock plus inbound crossed its line?
- Capacity Monitor: room for the next inbound shipment?
- Aged stock nearing 181 days: discount it, remove it or stop reordering.
- Open returns and their deadlines.
- Handling time on MFN SKUs still matching reality.
How PackQuay helps
For merchant-fulfilled orders, upload them as CSV or Excel and we ship from our own warehouse in Xinxiang, Henan, within 24 hours for stocked orders (48 at peak), with pick and pack from $2.00 to $1.00 per order. For FBA, we hold your buffer stock, free for the first 2 months, then apply Amazon labels, pack to Amazon's requirements and ship top-ups to Amazon's warehouses when your reorder point is reached. FNSKU labelling is $0.10 per unit and freight is at cost (see Amazon FBA prep). See our storage and warehouse service, or plan your next restock with us on WhatsApp.
FAQ
What is Amazon order management?
It is the process of handling Amazon orders from purchase to delivery and returns. For merchant-fulfilled orders that means shipping, confirming tracking, answering buyers and processing returns. For FBA orders it mainly means keeping the right amount of stock in Amazon's warehouses.
How do I manage merchant-fulfilled orders in Seller Central?
Use the Manage Orders page to see unshipped orders and their ship-by dates, ship within your handling time, and confirm each shipment with valid tracking. Buying labels through Amazon's Buy Shipping uploads tracking automatically, and protected labels keep carrier delays from counting against your on-time rate.
How much FBA stock should I keep?
Enough to stay above 28 days of supply, below which Amazon charges a low-inventory-level fee, and enough to cover your full restock lead time. Avoid holding units long enough to pass 181 days, when aged-inventory surcharges begin, and stay within your monthly FBA capacity limit.
When should I reorder inventory from China for FBA?
Reorder when FBA stock plus inbound units falls to your daily sales multiplied by your total lead time plus safety days. Lead time should include production, inspection, prep, freight, customs and Amazon check-in, and safety days should rise before Prime Day, Q4 and Chinese New Year.
Can a 3PL handle my Amazon orders?
Yes. A 3PL or fulfillment partner can ship your merchant-fulfilled orders and upload tracking, and can store buffer stock and send prepped, labelled top-ups to FBA. Its late or missed shipments still count against your Amazon account, so choose one with fast dispatch.