Inventory cutoff dates for FBA and Full before the holidays

There is a very specific way to lose the season that almost never shows up in the “get ready for December” posts: you buy well, you buy early, the goods are physically in Mexico, and the product still does not sell because the units spent three weeks waiting for a fulfillment center to check them in. The inventory exists, it is paid for, it is sitting inside the marketplace’s warehouse, and it cannot be sold. It is the worst possible outcome because the capital is already gone and you have neither the sale nor the cash.

This happens because sellers plan the season around when I ship while the marketplace plans it around when I can receive. Those are two different calendars and you only control one of them. Through October and November the Amazon and MercadoLibre networks reconfigure themselves to push orders out, not to take new merchandise in, and receiving — a routine few-day step during the rest of the year — becomes the longest and least predictable leg of your entire chain.

That is where the idea of a cutoff date comes from: the last day you can deliver a shipment with a reasonable expectation that it will be sellable before the peak. It is not a single date, it is not the same in Amazon FBA as in MercadoLibre Full, it is not the same for a large shipment as for a small one, and it changes every year with the capacity of the network. So the goal here is not to hand you a day on the calendar: it is to teach you to compute your own and make decisions with it.

If what you want is the wider picture of how the month behaves, that is in December: the month that defines your year. This post covers the leg that one does not: inbound logistics.

there is no single cutoff date — there are four

When a seller says “the FBA cutoff” they usually mean one thing: the day the carrier picks up the box. But between that day and the day someone can actually buy your product there are four distinct cutoffs, each with its own risk.

• Your supplier’s cutoff. The last day they can produce and hand off to you before the factory hits its own peak or a shutdown period. On imported goods this is usually the first one to fall and the least watched.
• The transit cutoff. The last day you can dispatch so the goods reach Mexico and, on imports, clear customs. This is where the most expensive and least predictable surprises live.
• The delivery-to-fulfillment-center cutoff. The last day the marketplace accepts the appointment or the shipment. This is what people normally call “the deadline” and it is only the third of four.
• The availability cutoff. The day the units actually go live for sale, after receiving, counting and check-in. It is the only cutoff your buyer cares about and the one almost nobody calculates.

Planning around the third and forgetting the fourth is the classic mistake. Your shipment “arrived on time” on November 20 and your product went live on December 9: you met the deadline and lost the opening stretch of the season.

why receiving clogs up exactly when you need it

A fulfillment center has finite staff, docks and operating hours. For eleven months of the year it splits that capacity between two jobs: taking merchandise in and shipping orders out. In peak season the second becomes an absolute priority, because the delivery promise to the end buyer is the one thing the marketplace cannot break. The consequence is mechanical: inbound capacity shrinks precisely in the weeks when every seller in the country wants to push inventory in.

A second effect stacks on top: inbound demand concentrates too. Everyone reads the same calendars and ships in the same two weeks. So you have less available capacity and a longer queue competing for it at the same time.

Seller-service blogs circulate estimates of how much this stretches — ranges of two to four weeks, or ten to eighteen business days against the normal two to five. It is worth saying plainly: those figures are third-party, they refer mostly to the US market, and none is confirmed by Amazon. Do not build your plan on them. What you can safely assert is the direction: receiving gets slower and, above all, more variable, and the variability is what hurts, because you cannot offset it with an average.

Glossary: lead time, the real end-to-end clock →

the dates you will find online and what to do with them

Search for “FBA holiday deadline 2026” and you will get specific days. October dates circulate, attributed to an Amazon peak-readiness document that can only be read behind a Seller Central login, and they get repeated from blog to blog until they look official. Two problems with using them: none of the ones we found is for Amazon Mexico — they are US marketplace dates — and none can be verified against a public source.

MercadoLibre is similar. The public documentation explains how Full works and spells out the Mexican terms and conditions, but seasonal inbound cutoffs are published per selling period and show up inside the seller’s panel, not on an open page.

So the rule is simple and has no exception: confirm the live cutoff in Seller Central and in MercadoLibre’s help center, on the day you are deciding. Any other source is a reference, not a fact. And if you cannot find a published date for your case, that does not mean there is no constraint: it means you have to plan with the method below.

One extra data point worth holding on to, because it changed the prep rules: shipments created from January 1, 2026 must arrive at Amazon’s fulfillment centers fully prepped and labeled, because Amazon ended its prep services. That pushes the labeling work onto your side of the chain and adds days to your own internal cutoff. Confirm that in Seller Central too before you build the shipment.

planning backwards: the method

The only solid way to set your cutoff is to start from the end. Do not ask “when do I ship?”. Ask “what day do I want to be selling this SKU?” and subtract each leg.

Say you want a particular imported SKU live on November 27, to enter the gift-buying stretch fully stocked. Working backwards, with example numbers you have to replace with your own:

• Target availability: November 27.
• Receiving and check-in at the fulfillment center: 12 days of slack in peak → deliver by November 15.
• Appointment and transport from your warehouse to the fulfillment center: 4 days → leaves your warehouse November 11.
• Prep, labeling and counting at your warehouse: 3 days → goods ready November 8.
• Customs clearance and inland transport: 9 days → arrival at port or border October 30.
• International transit: 32 days → dispatch September 28.
• Supplier production: 25 days → purchase order placed September 3.

The uncomfortable result is that to be selling on November 27, the order had to be placed in early September. That is the real conversation about peak season, and it is why December gets planned in August, not in November.

What matters in the exercise is not the numbers — yours will differ — but that every leg comes from your own history, not from an industry average. If your last four shipments took 9, 14, 11 and 23 days to be received, your planning assumption is not 14: it is closer to 23, because in peak season the long tail is the one that repeats. How to measure each leg honestly is covered in real lead time.

what arriving late actually costs

A shipment that misses the cutoff does not only cost you the sales of the days it sat still. It costs four things, and naming them changes how urgent the decision feels.

The peak sales, which never come back. A unit you did not sell on December 12 does not get sold on January 12: gift demand has an expiry date. It does not shift, it disappears.

The listing’s position. While your listing is out of stock it stops appearing, and the category’s visits and sales go to other sellers. When you come back you compete against listings that never broke stride, with the added sting that you broke yours in the month where the most history gets built.

Wasted ad spend. If campaigns kept running while inventory was not sellable, you paid for clicks that could not convert. It is the easiest cost to avoid and the one most often forgotten.

Capital frozen until January. Late merchandise does not vanish: it stays with you, now without the demand that justified the purchase, paying storage in the most expensive fee window of the year and competing for your cash exactly when you need liquidity for the next cycle.

the cutoff you do control: your own

Since the marketplace’s dates are uncertain and variable, the decision you can actually make is to set your own internal cutoff, earlier than any published one, and treat it as non-negotiable.

Three rules that work:

• Subtract the worst case, not the average. Use the slowest receiving leg from your recent shipments as your planning assumption. If you are wrong, you are wrong on the side of arriving early.
• Ship in waves, not in one load. Splitting into two or three staggered deliveries buys you a second chance: if the first gets stuck in receiving, the second is right behind it. A single shipment is a bet on one number.
• Prioritize by margin and velocity, not by volume. When capacity is scarce, the SKUs that go in first are the ones carrying the month’s profit and moving the most units per day, not the ones that fill a pallet neatly.

And one decision almost nobody makes in time: define now which SKUs you will switch to self-fulfillment if the cutoff is missed. Having that list ready before the emergency is the difference between changing fulfillment models calmly and improvising in the middle of peak season.

Glossary: reorder point, the level that triggers the purchase →

FBA and Full do not share a calendar

A common mistake is setting a single cutoff for the whole operation. If you sell the same product in Amazon FBA and in MercadoLibre Full, you have two distinct networks, with different capacity, different receiving policies and peaks that do not line up exactly.

That means two practical things. First, two cutoffs and two replenishment plans, not one. Second, that allocating units between the two channels is an economic decision, not a fifty-fifty split: it depends on where the SKU sells faster, what fee it pays on each side, and which of the two networks is receiving faster this season. The cost-structure comparison is in 3PL vs FBA vs Full.

Then there is the third channel, the one that gives you flexibility: your own warehouse or your 3PL. Holding part of the inventory outside the marketplace networks costs more per unit shipped, but it leaves you an exit when a cutoff is missed. In peak season that flexibility is worth more than the saving.

how this looks in iqseller

The panel does not publish Amazon’s or MercadoLibre’s cutoff dates — those get confirmed in Seller Central and in MercadoLibre’s help center, which is where they change. What it solves is the other side of the problem: the numbers you use to compute your own cutoff and to watch whether the plan is holding.

The Inventory module consolidates the stock that is yours wherever it sits: FBA, Full, your warehouse and your 3PL, in one view kept aligned with what each channel publishes. Without that, working out how many days of coverage you have left per channel is an exercise in spreadsheets and memory.

Forecast takes the sales velocity and the lead time you load and projects when each SKU hits zero, per channel. That projected date is literally the input for backward planning: it tells you the day you need availability, and from there you subtract the legs. Alerts flags when a SKU crosses its critical threshold or when velocity accelerates enough to pull that date forward, which in peak season happens in days, not weeks.

Profitability gives you the prioritization criterion when capacity does not cover everything: net margin per SKU with COGS you loaded, commissions from the Amazon settlement and MercadoLibre orders, FBA and Full fees, shipping, advertising, VAT and withholdings deducted. With that number next to it, deciding what goes into the shipment first stops being a hunch.

What the panel does not do is book the appointment, negotiate with the carrier or guess how long receiving will take this year. You measure those legs and load them; the panel turns them into a date.

the minimum dashboard for the coming weeks

Five numbers, reviewed weekly until the season closes:

• Target availability date per SKU, not ship date. It is the only one the buyer cares about.
• Days of coverage per SKU and per channel, sorted lowest first. Anything below its own lead time is already in trouble even if it still has units.
• Units in transit with an estimated availability date, kept separate from units already live. Mixing them is the most common way to believe you are stocked when you are not.
• The receiving leg of your recent shipments, so you can adjust the assumption you plan the next one with.
• Net margin per SKU, to decide who gets the scarce capacity.

And a closing question that orders everything: what is the last day on which a purchasing decision still gets to sell this season? If the answer is already behind you, the conversation shifts from “how much do I buy” to “how do I protect what I have”, and that is a different plan.