As a founder or ops manager for a growing product business, you probably tell yourself the same thing every year: I’m going to be better prepared for peak season this time.
And every year, October arrives and something breaks: a stockout on a hero SKU, a fulfillment partner overwhelmed by volume, a supplier who can't deliver on time.
You always think you could handle the unexpected, but even the smallest inventory hiccup causes your operation to unravel. That’s why it’s time to shake things up—to change the status quo, so that you can take full advantage of Q4, which, for most product businesses, represents 25–40% of their annual revenue
In the 2025 holiday season, you and your fellow product businesses brought in a whopping $253.4 billion in US online sales (in November–December alone), up 5.3% year over year. It’s seemingly the happiest season of all for a product seller, yet according to the Cin7 2025 State of Inventory Intelligence Report, 52% of inventory pros feel shopping holidays like Black Friday and Prime Day cause their single biggest operational challenges of the year, with 40% saying they actively struggle to keep up with customer demand.
Peak season is full of challenges, but does that mean success is out of reach? Not at all. You can make it a success, and we can help.
Success doesn’t come by working harder in November; it comes with making smart, strategic decisions before Q4, and this playbook provides everything you need to know about how to make the best decisions moving forward.
There is a counterintuitive reality of peak season that many product businesses are starting to recognize: their businesses are getting operationally better every year, but peak season feels harder.
This is because peak season expectations keep growing while it also continues to compress shortened timelines and higher volumes. The numbers supporting this are staggering:
What does this mean for your peak season inventory management planning? It means you need to be stocked and operationally ready earlier than ever before, and at the same time, you need to be able to sustain volume across a longer window.
If this isn’t a large enough problem (and lets be honest, this is always intimidating), it’s even harder if you’re only using spreadsheets.
Plenty of peak season challenges for product businesses exist, but there are three major pain points that consistently emerge across businesses that don't prepare properly:
Cin7's 2025 research found that inventory teams are already losing 16 hours per week syncing data across disconnected systems and channels. During peak season, that number doesn't stay flat—it spikes, precisely when capacity is most constrained and errors are most costly.
So, what’s the answer? Technology that automates your inventory management processes.
Retailers with automated inventory systems reported a 37% reduction in stockouts and a 29% decrease in excess inventory compared to those using manual processes during 2024's peak season. The gap between prepared and unprepared businesses is not a matter of luck. It's a matter of systems.
In a perfect world we could tell you exactly when to start your holiday inventory planning. However, it’s highly dependent on your supplier's lead time. A good rule of thumb, if your peak time is in Q4 is to begin early in the year, with decisions locked in no later than Q3. Waiting until October or November puts you behind competitors who already have their plans in motion.
In addition to starting early, a vital part of inventory planning is staying on top of supplier timelines. For instance, if you provide six months' notice, suppliers can offer expedited shipping or extended payment periods, but if you show up with six weeks' notice, you'll find yourself at the back of the queue.
For Amazon sellers, Amazon enforces strict inbound shipping deadlines for Q4. Missing these doesn't just delay sales. It can eliminate the entire holiday revenue window for affected SKUs. In Q4 2025, Amazon check-in times stretched from 5 days in August to 15 days in November.
Of course, we can’t forget the tariff situation. The National Retail Federation (NFR) says the unpredictable tariff policy is hurting small businesses and hindering inventory planning. Plus, surveys show a majority of businesses are now evaluating reshoring or nearshoring strategies, with one 2025 study finding 63% actively considering it. The lead times required to navigate tariff exposure make early planning even more critical in 2026.
With this in mind, let’s look at the steps you can take to get your peak season inventory management plans off the ground.
The most important thing you can do as a product business before peak season is build a demand forecast that goes beyond "last year plus a bit." Good forecasting is the foundation for every other decision (e.g., how much to order, when to reorder, how much safety stock to carry, and which SKUs deserve hero treatment).
Price is the deciding factor for 90% of online shoppers during peak season, and the best price is useless if you don't have the product in stock. Forecasting is what closes that gap, and 50% of product teams recognize that doing forecasting with the help of technology makes life much easier. But 52% of professionals continue to rely on spreadsheets to manage their inventory. A quick reminder that your forecasting is only as good as the least reliable tool in your tool kit.
Let’s say your team has a system cobbled-together with spreadsheets. Here’s a step-by-step guide for how you can build a peak season demand forecast practically:
Easy, right? It can be even easier!
According to Cin7’s research, 39% of product businesses are now using AI tools in their inventory management and 35% use predictive analytics. These aren't enterprise-only capabilities. They’re available in platforms like Cin7 through ForesightAI, an advanced tool that enables demand forecasting with accuracy months in advance and boils these steps down to just minutes of work with a few clicks of a button.
Now, let’s assume that you’ve either created a demand forecast for peak season on your own or through an AI-powered tool, like ForesightAI. You’ve got the stock numbers sitting in front of you in black and white, but there’s something you need to add and that’s safety stock.
Safety stock is the buffer inventory held above your expected demand to protect against forecast error, supplier delays, and demand spikes. During peak season, the cost of not having it vastly outweighs the carrying cost of holding it.
Here’s a simple safety stock formula for ops managers:
Safety Stock = (Maximum daily usage × Maximum lead time) – (Average daily usage × Average lead time).
Keep in mind that you’ll want to tier your safety stock levels. Hero SKUs warrant higher buffers; slow movers should not be over-provisioned. The goal is capital efficiency, not blanket overstocking.
By giving yourself safety stock, you’re taking a calculated risk. You know that not having enough of a hero SKU during Black Friday doesn't just cost you the sale; it costs you the customer. Customers who experience a stockout during peak season are likely to switch to a competitor, potentially permanently, so ensuring you have what you need on hand to retain customers is the way to go.
As you contemplate the value of safety stock, here’s one more thing to consider: Cin7’s 2025 report found that businesses already using connected inventory technology are reporting 78% fewer stockouts while simultaneously experiencing 75% less overstock. This means that the ForesightAI-suggested reorders are more accurate than spreadsheets and gut feelings. ForesightAI helps narrow the scope of how much stock a business has to reorder and have available to ensure that they have enough stock but not too much stock.
That’s a win-win situation.
Your peak season preparations are only as good as your supplier relationships. No forecast saves you if your suppliers can't deliver on time at the volume you need. According to Deloitte's 2025 Retail Holiday Buyer Survey, most businesses are concerned their current suppliers may not be able to fulfil holiday orders amid geopolitical tensions. Real-time supplier management is critical.
As for tariffs, 68% of retailers are facing higher operating costs heading into the 2025/2026 peak season, partly driven by the need to hold inventory earlier to avoid tariff exposure.
Bottom line? Having early supplier conversations means more flexibility on timing and terms.
If you’re not sure what you need to do to align your suppliers and supply chains, then the following checklist (which you should complete by July/August!) will help.
As you work through these strategic steps, you should know that having connected operations through comprehensive inventory management software delivers a major advantage: Your supplier data lives in your inventory system rather than in a separate spreadsheet or inbox, which translates into being able to adapt in real time.
Specifically, supplier delays are flagged in your inventory platform, triggering an automatic reorder point right away and eliminating a stress-inducing Monday morning discovery.
Operational readiness is not just about having enough stock. It's about having the right stock in the right location with the right processes to get it out the door, at scale, without the wheels coming off. But to make sure this all happens, you might think you need more people. Or do you?
According to Challenger, Gray & Christmas, total holiday hiring is expected to fall below 500,000 positions, which is the weakest seasonal employment gain in 15+ years. Sixty-eight percent of retailers anticipate higher operating costs despite hiring fewer people.
That said, don’t be discouraged. The best way to handle peak season volume isn’t headcount; it’s the right system.
Cin7's research found that teams using connected inventory technology save an average of 15 hours per week nearly cancelling out the 16 hours currently lost to manual syncing across channels. During peak season, that 15-hour saving is the difference between a team that can cope and one that can't.
Just like our handy supplier preparation checklist, there’s also a practical warehouse audit checklist (also for July/August):
So far, you’ve learned the steps to building a demand forecast, aligning your suppliers and supply chain, and preparing your warehouse and fulfillment before peak season gets here. The next step is learning that every step above depends on having the right systems in place (by July—not October).
How do we know this? We asked
Our research found that two of the top barriers to growth are outdated inventory systems (50%) and unintegrated inventory and e-commerce platforms (42%). Both of those problems become catastrophic during peak season.
Catastrophic problems should be avoided at all costs, which means you need to ask yourself a very important question: Can my current inventory system give me real-time visibility across all sales channels simultaneously? If the answer involves refreshing a spreadsheet or running a report, the answer is “no.”
By now, you know that we love our checklists. Here’s a clear checklist to evaluate whether your current stack is or is not peak-season ready.
If you can answer “yes” to all six questions, you're operationally ready to scale peak season volume. If you can't, each "no" is a potential failure point during your highest-stakes trading period.
The cardinal rule of peak season tech is this: Never implement new inventory systems in October or November. The risk of disruption during peak trading is too high. New systems need to be live, tested, and adopted by the team by September at the absolute latest.
If you're reading this in July or August, you still have the window to implement new inventory technology and have it bed in before peak season. If you're reading this in October, focus on making your current system work as well as possible and plan the upgrade for Q1.
Regardless of timing, you know that even the most intuitive platforms require a period of adoption. The 15 hours per week in time savings that connected inventory teams note in the Cin7 2025 report don’t materialize overnight. It builds as the team develops fluency with the system. Starting in July means those savings compound through your most important months.
The peak season playbook is designed to help you be prepared.
A prepared business taps the power of connected inventory technology for real-time inventory visibility across all channels. You’ll have automated reorder triggers that prevent stockouts before they happen. Accurate forecasts based on data-driven purchase decisions, not gut-feel. A 3PL or warehouse operation that's briefed, tested, and integrated. And a team that spends Q4 managing exceptions, not firefighting data.
To solidify our point, here are a few more statistics from Cin7 2025 State of Inventory Intelligence Report for businesses already using connected inventory technology:
These are not marginal gains. They're the difference between a Q4 that builds the business vs. one that just survives it. Plus, 87% of inventory professionals believe AI will revolutionize inventory management over the next five years and 61% say their company plans to invest in AI in the next 12 months.
The businesses investing now? They’re the ones who will be operationally ahead in every peak season that follows.
As we’ve been saying, peak season success is not about working harder in November. It's about the decisions you make in May and June. Every action item in this playbook can be started today, and the earlier you start, the more prepared you’ll be.
Businesses that prepare in Q2 and Q3 don’t just survive Q4—they capitalize on it. They capture demand lost to competitors’ stockouts, fulfill orders others can’t due to unprepared warehouses, and start Q1 with cash instead of excess inventory and burnout. Prepared businesses also fulfill orders that competitors can't because their warehouse isn't ready. And they start Q1 with cash, not with a pile of unsold inventory and a team that's burnt out.
The businesses who win at peak season aren't the ones with the biggest budgets. They're the ones who started preparing when everyone else was still thinking about it. If you’re ready to be that winning business, see how Cin7 and ForesightAI can help product businesses get ready, and stay ready, year-round.