Q4 fulfillment planning is mostly a summer job. Black Friday falls on November 27 this year and Cyber Monday on November 30, but the decisions that decide whether those orders ship on time get made in July, August and September: when the container sails, whether a dock appointment is booked, and where the extra pallets will sit.
This is the month-by-month calendar we would hand a founder who sells most of the year’s units between October and December. It covers inbound container timing, overflow storage, Amazon’s 2026 inventory deadlines, carrier holiday cutoffs, and the January returns wave that most plans forget.
It is written from our warehouse floors in Southern California, so the timing assumes your goods come in through the Ports of Los Angeles and Long Beach. If you import through the East Coast, the logic holds but the transit legs change.
One note before the calendar. If you are reading this in mid-October with nothing booked, read the October section first. Some of this year’s deadlines have passed, and a few of the remaining ones are days away.
The Q4 calendar at a glance
Each month has one job. If that job slips, every month after it gets more expensive.
| Month | The one job | What you do | Fixed dates for 2026 |
|---|---|---|---|
| July | Size the peak | Forecast by SKU, place production, book ocean freight, reserve overflow storage | Amazon deal submissions open July 8 |
| August | Lock the inbound | Confirm sailings, send ASNs, book dock appointments, order packaging | Prime Big Deal Days inventory due Sept 2 to 16 |
| September | Receive and count | Containers land, inventory is received, counted and put away, Amazon shipments built | Prime Big Deal Days FBA cutoff Sept 16 |
| October | Close the door | Last inbound, Amazon Black Friday stock lands, holiday order cutoffs published on your site | Amazon peak fees start Oct 15; Black Friday FBA cutoff Oct 28 |
| November | Protect stock | Watch daily sell-through, pause promotions on SKUs you cannot refill | Black Friday Nov 27; Cyber Monday Nov 30 |
| December | Hit the cutoffs | Ship to carrier deadlines, switch late orders to faster services | Carrier ground cutoffs Dec 15 to 17 |
| January | Absorb returns | Process returns, release overflow space, compare forecast to actual | Amazon peak fees end Jan 14, 2027 |
The sections below explain what sits behind each line, in plain terms, with the numbers we work to.
July: size the peak before you buy it
July is when you decide how much inventory Q4 needs, and therefore how much space, labour and freight it needs. Every later problem traces back to a number set this month.
Forecast by SKU, not by total
A total forecast tells you how many units to buy. It does not tell you which ones will run out. Pull last year’s October to December units for each SKU, adjust for what has changed, and write down the weeks of cover you want on hand going into Black Friday.
Weeks of cover is simple: units in stock divided by units sold per week. If a SKU sells 300 a week in November and you want six weeks of cover, you need 1,800 units sellable by early November, not in transit.
Work backward from the day stock must be sellable
An import order has four legs: factory to origin port, ocean transit, port to warehouse, and receiving. The port-to-warehouse leg is called drayage, which is the short truck move from the terminal to a warehouse.
Get the booked transit time from your freight forwarder in writing, then add the other three legs. Do not plan to the vessel’s arrival date. A container that arrives at the port is not inventory you can sell. It becomes sellable only after it clears the terminal, gets trucked to the warehouse, and is received into the warehouse management system (WMS), the software that tracks every unit by location.
Turn units into pallets
Your warehouse thinks in pallet positions, not units. Divide peak units by units per pallet for each SKU. If a SKU packs 400 units to a pallet and you will hold 12,000 at peak, that is 30 pallets for one SKU.
Do the math across the catalogue and compare it with a normal month. The gap between the two is your overflow requirement, and July is when you should know it.
Reserve overflow space now
If your normal footprint is 20 pallets and peak is 50, the extra 30 only exist from September to January. Reserve that space in July, while warehouses still have it. By September, Southern California space gets tight because Q4 import freight lands in the same few weeks and Amazon’s own warehouses are receiving holiday stock at the same time.
Our ecommerce warehousing is set up for exactly this pattern. Seasonal overflow is taken for the season and released when it ends, with no annual commitment on surge volume. Our Perris warehouse in the southern Inland Empire is built for bulk storage and seasonal overflow, so peak pallets sit apart from your everyday pick faces.
Ask any warehouse you are considering three questions in July: how many pallet positions can you hold for me from September to January, what is the rate, and what happens if my container lands two weeks early. Get the answers in writing.
Amazon starts in July too
Amazon opened 2026 holiday deal submissions on July 8. If you sell on Amazon, July is when you decide which SKUs go into Prime Big Deal Days and Black Friday deals, because that decision sets how much stock has to reach Amazon in September and October.
August: lock the inbound
August is paperwork month. Nothing exciting happens on the dock, but the quality of the paperwork decides how fast your freight is received in September.
Confirm every sailing and its arrival date
Ask your forwarder for the vessel name and ETA (estimated time of arrival) for every container carrying Q4 stock. Then ask again two weeks later. ETAs move, and the brands that get caught are the ones still working from the date they were quoted in June.
Put every container on one sheet: container number, vessel, ETA, SKUs inside, units per SKU, and which warehouse it is going to. That sheet becomes your receiving plan.
Send ASNs for every inbound
An ASN (advance shipping notice) is the document that tells the warehouse what is coming before it arrives: which SKUs, how many units, how many cartons, which container or truck. The receiving team checks what physically arrives against it.
Without an ASN, every carton has to be identified and counted from scratch, and discrepancies get discovered late. With one, shortages and overages get flagged the day the freight arrives, which is when your supplier claim is strongest.
Book dock appointments early
Warehouses that receive containers schedule them by appointment, and in September those slots fill. Book the slot as soon as you have a firm ETA, and tell the warehouse whether the freight arrives floor-loaded (loose cartons stacked inside the container) or palletised. Floor-loaded containers take far longer to unload.
Fix labels at the factory, not at the dock
Every carton should carry the SKU, the quantity, and a scannable barcode. Every unit should carry its own barcode. If a SKU is going to Amazon, ask whether the factory can apply the FNSKU (Fulfillment Network Stock Keeping Unit), the Amazon-specific barcode that identifies your unit inside Amazon’s network.
Relabelling 12,000 units in a warehouse in September is possible. It is also slower and more expensive than getting it right on the production line in July.
Order packaging and inserts
Boxes, mailers, tissue, inserts and gift notes have their own Q4 lead times. Order enough for peak volume plus a buffer, and get the packaging specs to your 3PL (third-party logistics provider, the company that stores and ships for you) before the first holiday order drops.
Split Amazon stock from direct-to-consumer stock
Decide now how many units of each SKU go to Amazon and how many stay with your 3PL for Shopify, TikTok Shop and wholesale. If you send everything to Amazon, your own site goes out of stock. If you hold everything back, you miss Amazon’s inventory deadlines.
September: receive, count and put away
September is when the summer’s planning turns into physical inventory. Containers land, freight gets received, and Amazon-bound stock gets built and shipped.
Get containers off the terminal fast
Once a container is available at the port, the clock starts. Terminals and ocean carriers allow a set number of free days, then charge daily fees. Demurrage is the charge for a loaded container sitting at the terminal past its free time. Detention, sometimes called per diem, is the charge for keeping the carrier’s container outside the terminal too long before returning it empty.
Free days and daily rates are set by the terminal and the ocean carrier, and they vary by contract. Get yours in writing from your forwarder before the vessel arrives, not after the first invoice.
This is where warehouse location starts to cost real money. Our Commerce warehouse sits on the I-5 and I-710 corridor and has the shortest drayage run of our four sites from the Ports of Los Angeles and Long Beach. Shorter drayage means fewer hours on the truck and less exposure if the terminal is congested.
What good receiving looks like
Receiving is the step where freight becomes sellable inventory. Cartons are unloaded and counted, units are inspected, damaged units are pulled and photographed, and every SKU is scanned into the WMS against your ASN.
At our docks, shipments that arrive before our receiving cutoff are received, scanned and live in inventory the same business day, with a receiving report sent before end of day. You can read how we receive inventory step by step, including what happens to damaged units.
The point for your Q4 plan: a warehouse that takes five days to receive a container in September effectively moves your inventory deadline five days earlier. Ask any provider how long receiving takes in their busiest week, not their quietest.
Count before the peak, not during it
Run a cycle count on your top SKUs once the last big container is put away. A cycle count is a scheduled count of a subset of inventory, done without shutting the warehouse down.
The goal is to make sure the number your Shopify or Amazon listing shows matches what is physically on the shelf. A drift of 50 units on a top seller is invisible in September. On Black Friday it becomes 50 cancelled orders.
Build and ship Amazon stock
If you sell through FBA (Fulfillment by Amazon, where Amazon stores and ships your units), September is when Amazon-bound shipments get prepped, labelled and sent. For 2026, Amazon’s inventory deadlines for Prime Big Deal Days fell on September 2, 9 and 16, depending on shipment type. Those have passed, but the pattern repeats each year, so plan next year’s Amazon prep for late August.
Our Jurupa Valley warehouse is close to Amazon’s ONT2, ONT8 and LAX9 fulfillment centers, which shortens the last leg of an FBA shipment from Southern California.
October: close the door on inbound
October is the last month to get stock into position. After it, you are selling what you have.
Amazon’s Black Friday inventory deadlines
Amazon published its 2026 holiday calendar in July. To keep the Prime badge on your listings during Black Friday Week and Cyber Monday, your inventory has to arrive at Amazon’s facilities by these dates, according to Amazon’s Holiday 2026 seller announcement:
| Shipment type | Must arrive at Amazon by |
|---|---|
| AWD (Amazon Warehousing and Distribution, Amazon’s bulk storage tier) | Wednesday, October 14, 2026 |
| FBA with “minimal shipment splits” selected | Wednesday, October 21, 2026 |
| FBA with “Amazon-optimized shipment splits” selected | Wednesday, October 28, 2026 |
The split setting controls how many Amazon warehouses your shipment is divided across. Amazon notes that most sellers use the optimized option.
These are arrival dates, not ship dates. Work back from them by your transit time plus a buffer for Amazon’s own check-in, which slows in peak. Amazon says its fulfillment center teams concentrate on receiving holiday freight in September and October, then shift to customer orders in November and December, so you may see lower capacity limits late in the season.
Two more Amazon dates matter this month. Black Friday and Cyber Monday deal submissions close October 20. Holiday peak fulfillment fees run from October 15, 2026 to January 14, 2027, averaging $0.32 more per unit than non-peak rates, with Amazon’s 3.5% fuel and logistics surcharge applied on top. Build both into your deal pricing.
If your Amazon stock still needs labels, poly bags or bundling, Amazon prep in Southern California is the step to book before the October 28 cutoff, not after it.
Set your own holiday order cutoffs now
Your customers need to know the last day to order for Christmas delivery, and that date has to be published in October so it appears in every holiday email.
The formula is: carrier last ship date, minus your warehouse’s processing time, minus one buffer day. At our warehouses, orders placed before 2pm Pacific are processed the same day. So if USPS recommends shipping Ground Advantage by Thursday, December 17, a sensible customer-facing cutoff for that service is Wednesday, December 16, at 2pm Pacific.
Run the same calculation for every service you offer. The carrier dates are in the December section below.
Last call for direct-to-consumer inbound
Any direct-to-consumer stock that is not received by early November is competing for dock time with every other brand’s last-minute freight. If a container is going to land after that, decide now whether to air-freight a portion of the hero SKUs, or accept that those units become January stock.
If you are reading this in October with nothing booked
Focus on three things this week. Confirm exactly when your remaining freight lands and where it is going. Get overflow space confirmed in writing, even if it costs more than it would have in July. Publish your holiday cutoffs.
Do not start a 3PL switch now unless your current provider is failing outright. We cover why in the section on when this plan is the wrong fit.
November and December: protect stock and hit the cutoffs
By November the plan is mostly locked. Your job shifts from building inventory to protecting it and getting orders out before the carriers’ last days.
November: watch sell-through daily
Check units sold against units on hand every morning from Black Friday, November 27, through Cyber Monday, November 30. If a hero SKU is selling faster than forecast and you cannot refill it before mid-December, pull it from paid promotion before it sells out. An out-of-stock listing that is still running ads is burning money.
Keep an eye on returns too. A surge of returns on one SKU in early December can point to a sizing, listing or packaging problem you can still fix for the rest of the season.
2026 holiday shipping cutoffs
These are the carriers’ own recommended last ship dates for delivery before Christmas within the contiguous United States. They are recommendations, not guarantees, and carriers can change them, so recheck the sources the week you publish your own cutoffs.
| Carrier and service | Last recommended ship date | Delivery target |
|---|---|---|
| FedEx Ground Economy | Tuesday, December 15 | December 24 |
| USPS Ground Advantage | Thursday, December 17 | Before December 25 |
| USPS First-Class Mail | Thursday, December 17 | Before December 25 |
| FedEx Ground and Home Delivery, 5-day lanes | Thursday, December 17 | December 24 |
| USPS Priority Mail | Friday, December 18 | Before December 25 |
| USPS Priority Mail Express | Saturday, December 19 | Before December 25 |
| FedEx Express Saver | Monday, December 21 | December 24 |
| FedEx 2Day | Tuesday, December 22 | December 24 |
| FedEx Ground and Home Delivery, 1-day lanes | Wednesday, December 23 | December 24 |
| FedEx overnight services | Wednesday, December 23 | December 24 |
| UPS, all services | UPS had not published 2026 last-ship dates by service at time of writing. | December 24 |
What the table means if you ship from Southern California
FedEx states that ground transit within the contiguous U.S. typically runs 1 to 5 business days depending on destination. That spread is the whole story for a West Coast brand.
From our warehouses, ground delivery reaches California, Arizona and Nevada in 1 to 2 days, covering more than 50 million consumers. Those customers can order later in December than customers in New York or Florida. You can publish two cutoffs, one for western states and one for everyone else, and keep taking West Coast orders after your national cutoff has passed.
When to switch to faster services
After your ground cutoff passes, you have two options: stop promising Christmas delivery, or move late orders to a faster service and absorb or pass on the cost. Decide which one in October, write it into your cutoff messaging, and tell your 3PL which service to use for orders placed after each date.
January: the returns tail and the reset
Q4 does not end on December 31. Gift returns, wrong sizes and change-of-mind returns arrive through January, and how fast they are processed decides whether that stock earns money in Q1 or sits in a corner until March.
Plan for returns before they arrive
Your return window sets the length of the tail. If you extend returns for holiday purchases, your last holiday returns could land weeks into January. Check your own policy and plan receiving capacity through to its final day.
Tell your 3PL in December what to do with each return type: restock as new, restock as open box, refurbish, liquidate or destroy. Without written rules, returns pile up waiting for someone to decide.
At our warehouses, returns are inspected, restocked and sellable within 48 hours. Our returns processing page covers the grading steps. The speed matters most in January, because a restocked unit can go straight back on sale while full-price demand from gift cards is still running.
Release overflow space
Overflow storage exists for the peak, so let it go once the peak has passed. Consolidate leftover units into your everyday footprint and release the extra pallet positions so you stop paying for them.
On Amazon, peak fulfillment fees end on January 14, 2027. Review slow sellers still in Amazon’s network and decide whether to pull them back or let them sell through.
Run the post-mortem while it is fresh
For every SKU, compare forecast units with actual units sold, and note where you stocked out and where you overbought. Record which inbound legs ran late and by how many days.
That sheet is next July’s forecast. The brands that get Q4 right in year three are the ones that wrote down what went wrong in year one.
When this plan, or a Southern California 3PL, is the wrong fit
A Q4 plan built around one Southern California operation works for a specific kind of brand. Here is where it does not, including where we are the wrong answer.
Most of your customers are east of the Rockies. Shipping from Southern California, your West Coast customers get 1 to 2 day ground and your East Coast customers sit on the longest ground lanes, which means your earliest holiday cutoffs apply to your biggest market. If fast East Coast delivery in December is what you need most, a national provider with East Coast warehouses will serve you better than we will. That is a real advantage of the larger networks, and we would rather say so than pretend otherwise.
You sell only on Amazon. If every unit you own ends up in Amazon’s network, compare Amazon Warehousing and Distribution before paying any 3PL for Q4 overflow. Amazon positions AWD as lower-cost bulk storage that automatically replenishes your FBA stock, and for a single-channel seller it may cost less than holding the same pallets with us. Run the numbers on your actual volume before deciding.
You ship under 50 orders a month. We invoice a $500 monthly minimum, and if your charges fall short we bill the difference. For a handful of pallets of holiday stock and low order volume, a self-storage unit and your own packing table will cost less. Come back when volume grows.
You are thinking about switching 3PLs in October or November. Don’t, unless your current provider is failing outright. Our onboarding gets brands to live orders in 5 to 7 business days, and the full sequence is laid out in how long 3PL onboarding takes. But moving thousands of units between warehouses in peak means a window where stock is on a truck instead of on a shelf. Fix the problem in January, when a slow week costs you far less.
Your product is cold-chain or hazardous. We do not handle either. Find a provider licensed and equipped for it, and book their peak space earlier than you would for standard goods.
Q4 fulfillment planning FAQ
When should I start Q4 fulfillment planning?
Start in July, or at the latest when you place your Q4 production order. By then you need a SKU-level forecast, a booked ocean transit time, and overflow storage reserved for September to January. Brands that start in October can still ship the season, but they pay more for space and freight and have fewer options when a container runs late.
What is Amazon’s FBA inventory deadline for Black Friday 2026?
Amazon’s published arrival deadlines for Black Friday Week and Cyber Monday 2026 are October 14 for AWD shipments, October 21 for FBA shipments using minimal shipment splits, and October 28 for FBA shipments using Amazon-optimized splits. These are dates your inventory must arrive at Amazon’s facilities, so ship earlier than the date itself.
What are the 2026 holiday shipping cutoffs?
For delivery before Christmas within the contiguous U.S., USPS recommends shipping Ground Advantage by Thursday, December 17, and Priority Mail by Friday, December 18. FedEx’s last day for Ground Economy is Tuesday, December 15, with standard Ground running from December 17 to December 23 depending on transit days. Recheck carrier pages before publishing your own cutoffs.
How much extra warehouse space do I need for peak season?
Divide your peak units by units per pallet for each SKU, then compare the total with an average month. The difference is your overflow need. A brand that normally uses 20 pallet positions and peaks at 50 needs 30 positions from roughly September through January, and should reserve them in July.
Can I add overflow storage without a long contract?
At 6G Logistic, seasonal overflow is taken for the season and released when it ends, with no annual commitment on surge volume. Storage is billed on the space you occupy, and our $500 monthly invoice minimum applies across all services. Ask any provider for their surge terms in writing before September.
How long do holiday returns keep coming in?
As long as your return window allows. If you extend returns for holiday purchases, expect returns to keep landing through January. Plan receiving capacity and written restock rules for the full window, so returned units are graded and back on sale quickly rather than waiting for a decision.
Size your peak with someone who will answer the phone
If you want a second set of eyes on your Q4 numbers, book a 15-minute call to size your fulfillment needs. Bring your monthly order volume, SKU count, peak pallet estimate and container ETAs. We will tell you which of our four Southern California warehouses fits your freight, what peak storage would cost, and whether we are the right fit at all. If you ship 500 or more orders a month, see how we run high volume fulfillment.
You get a written quote within 24 hours, with every line item shown and the $500 monthly minimum stated up front. Talk to us, or call our sales line at (949) 468-7759, Monday to Saturday, 8am to 6pm Pacific.