How much inventory should I send to FBA for Black Friday?

Multiply daily sales by days of coverage, applying the peak factor only to the event days, add safety stock, and subtract what is already available and in transit. The result is the quantity to send.

What is the deadline to send inventory to FBA before Black Friday?

Amazon announces the holiday inbound cutoff dates every year. Check the inbound deadline announcement in Seller Central and schedule arrival with a buffer, because receiving usually slows down during peak season.

How do I set the peak factor?

Use the ratio between daily sales during past events and the average of the weeks before them. With no product history, start with a conservative factor and add inventory as sales confirm it.

What happens if I have inventory left over after the event?

Excess inventory can trigger storage fees and hurt your inventory metrics. That's why you should apply the peak factor only to the event days and keep safety stock proportional.

How to Plan FBA Inventory for Black Friday

To plan FBA inventory for Black Friday, estimate how much you'll sell during the peak period, add a safety margin, and subtract what's already available and in transit. Then work backward: the product has to be received and available at the fulfillment center before the event, and receiving times usually stretch during peak season.

The quantity formula

A simple calculation covers most cases:

Quantity to send = (daily sales × days of coverage × peak factor) + safety stock − available inventory − inbound inventory

Daily sales: recent average, excluding stockout days (days with no inventory drag the average down).
Days of coverage: the period this shipment has to cover — the event plus the days until the next replenishment arrives.
Peak factor: how much daily sales rise during the event. Use your own history from past events; without history, start conservative and adjust.
Safety stock: covers forecast error and receiving delays.
Available and inbound: what's already in FBA and what's been shipped but not yet received.

Example

A product sells 10 units per day. The shipment needs to cover 30 days, 7 of them event days with a peak factor of 2.5. Demand comes to: 23 days × 10 + 7 days × 10 × 2.5 = 230 + 175 = 405 units. With 60 units of safety stock, you need 465. If 120 are available and 80 are inbound, the shipment is 465 − 120 − 80 = 265 units.

Notice that the peak factor applies only to the event days. Applying it to the whole month is the most common way to end up with excess inventory in January.

Working the timeline backward

Target date: inventory received and available before the deals start.
FBA receiving: add a buffer for receiving, which usually slows down during peak season.
Transit: time from carrier pickup to the fulfillment center.
Prep: labeling, packaging, and creating the shipment.
Production or purchasing: your supplier's lead time.

Amazon announces the holiday inbound cutoff dates every year. Check the inbound deadline announcement in Seller Central and treat the official date as a ceiling, not a goal.

FBA precautions during peak season

Capacity limits: check the capacity dashboard to see how much you can ship and store; requesting more space late may not leave enough time.
Split shipments: your shipment may go to more than one fulfillment center; plan boxes and labels for that.
Excess inventory after the event: overstock can trigger storage fees and affect your inventory metrics. That's why safety stock should be proportional, not “double, just in case.”
Items that sell together: if one runs out, the other drops too. Plan pairs together.
Receiving discrepancies: check received against shipped as soon as the shipment closes — see how to find FBA shipment discrepancies.

During and after the event

Track daily coverage for your best sellers. If the forecast shows a stockout before the next shipment arrives, prioritize those items for replenishment and cut ad spend on products that won't have inventory — ads for an out-of-stock product are spend with no return. For the tracking method, see how to predict stockouts.

How EcomVision helps

EcomVision's Black Friday Plan calculates, for your best-selling products, each one's peak based on how it performed last Black Friday, the warm-up and peak demand minus what's already in FBA and on the way, and the shipping deadline based on how long your inventory takes to become available. It also suggests a daily budget per phase, only for campaigns within your ACoS target.

Update notice: Amazon's rules, reports, and deadlines change periodically. Always check the official documentation for current behavior (see sources below).