Inventory how-to

How to plan inventory for TikTok demand

TikTok demand spikes are fast and short.

Short answer: TikTok demand spikes are fast and short. Plan by keeping a buffer stock ready before you post or work with a creator, watching daily sell-through closely once a video is live, and reordering early because supplier lead time does not shrink just because a video went viral. Treat it as a demand shock on top of your normal forecast, not a replacement for it.

Why normal forecasting lags behind TikTok

Forecasts built on a 28-day sales window assume demand today looks like demand over the past month. A TikTok spike breaks that assumption in a day. By the time a forecast adjusts, you may already be out of stock. You need a manual override for known or suspected viral moments, not just a tool that reacts after the fact.

Build a buffer before you post

If you know a video, ad, or creator post is coming, increase stock on the affected SKU beforehand. Treat it like a planned promotion: estimate a demand multiple (even a rough guess, like 3x to 10x normal daily sales), and place a purchase order early enough that it lands before the content goes live. Lead time plus a cushion of safety days still applies, it just needs to be calculated against your inflated estimate, not your historical average.

Watch daily sales in the first 24 to 48 hours

Once the content is live, check sales daily, not weekly. If a SKU is selling faster than your buffer covers, you need to know within a day or two, not at the next scheduled reorder check. Compare actual daily sales against on-hand stock to get a rough days-of-stock number, and escalate the next purchase order if that number is dropping fast.

Reorder early and expect short supplier patience

Suppliers will not speed up lead time just because you are trending. Place your reorder as soon as the spike looks real, even before you are sure it will last. If the SKU sells out, you lose momentum and the sale goes to a competitor. It is better to over-order slightly on a true spike than to stall out mid-trend.

After the spike, reset your baseline carefully

A viral spike will distort your trailing sales average for weeks. Watch for this once things calm down, since a forecast built on inflated recent sales will suggest over-ordering. Mentally discount the spike period when judging normal run-rate, or wait for enough normal days to accumulate before trusting the automated numbers again.

Step by step

  1. Identify SKUs likely to be featured before you post or send product to a creator
  2. Estimate a rough demand multiple and place a buffer order ahead of the post, sized against lead time plus safety days
  3. Check daily sales on those SKUs for the first 48 hours after the content goes live
  4. Calculate days of stock (on hand / daily sales) daily during the spike, not weekly
  5. Place a reorder as soon as the spike looks sustained, without waiting for your normal reorder date
  6. After the spike ends, discount that period when judging your normal baseline sales rate

Worked example

Say a SKU normally sells 4 units a day and you have 40 on hand, giving you 10 days of stock under normal conditions. A creator posts a video and the SKU sells 60 units on day one. At that pace, 40 units covers less than a day. If your supplier lead time is 14 days and safety days are 5, you need to place an emergency order immediately rather than waiting for a scheduled check, even if your last order was only a week ago.

How SteadyShelf helps

SteadyShelf forecasts off a 28-day sales window, so it will not predict a TikTok spike in advance and will lag in adjusting to one in progress. Use it for your baseline reorder points and lead-time math, but handle the spike itself manually: raise quantities by hand, reorder early, and let the forecast catch up once sales settle.

$29/month flat, unlimited products and suppliers, 30-day free trial. Run the numbers now with the free reorder point calculator.

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FAQ

Can SteadyShelf detect a TikTok spike automatically and reorder for me?

No. It forecasts from a 28-day sales window and does not predict sudden external demand events. You need to raise order quantities manually when you expect or see a spike, and let the forecast normalize afterward.

Will a TikTok spike mess up my forecast after it's over?

Yes, likely. A short burst of high sales pulls up your trailing average and can suggest ordering more than you actually need going forward. Keep an eye on suggested quantities for a few weeks after a spike and adjust down by hand if they look inflated.

Let SteadyShelf do this math for every SKU

Order-by dates per supplier, seasonal forecasts and draft POs for your Shopify store. $29/month after a 30-day free trial.

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