TikTok Shop Shopify integration that keeps one stock count

On TikTok’s channel, the sale goes like this. A TikTok order comes in at 8:03. TikTok asks Shopify how many are in stock, Shopify says 37, the order is created in Shopify and the count moves. Orders 2 to 40 go the same way. Order 41 arrives at 8:09, TikTok asks Shopify, Shopify says 0, and the order isn’t created in Shopify at all. The buyer has still bought it on TikTok. Orders 41 to 55 sit in Seller Center with nothing in Shopify to match them. That behaviour is in Shopify’s help page for the channel, under how inventory is checked when an order is placed. It’s a reasonable design for a catalogue that sells a few units a day.

On QuickSync, TikTok pushes each order to us the moment it’s placed; we don’t ask on a timer. Shopify’s count is corrected in under a second, so at 8:03 Shopify says 39, at 8:09 it says 0, and the storefront stops selling. Orders 41 to 55 still exist, because TikTok took them, and they arrive in the same list as the first 40 with their TikTok order numbers on them. You cancel 15 and refund 15 in Seller Center, same as on the other route. What you don’t have is a Shopify count that read 12 while TikTok was selling the last one.

One kind of order is left out either way. If TikTok ships it for you (Fulfilled by TikTok), TikTok holds that stock and we mark the order as not ours to sync. Your Shopify count was never the count it shipped from.

Install the TikTok sales channel from the Shopify App Store, sign in to Seller Center, clear the business verification, map your catalogue. From then on products publish to TikTok Shop, TikTok orders land on your Shopify orders page, and you fulfil them there. Refunds, returns and cancellations stay in Seller Center. Shopify’s setup pages are here.

If you sell a few units of each product a day, never sell out mid-stream, and TikTok and Shopify are the only two places the stock lives, that’s the whole job done and you should stop reading.

Two things it can’t do. It has no idea a third shop exists: an Etsy shop, an eBay listing or a Square till holding the same unit is outside it, because the channel only knows how to push Shopify outward. And it checks the count instead of receiving the sale, which is the difference the twelve minutes above turn on. One figure from our side, counted on 15 September 2026: 469 sellers run TikTok Shop and Shopify through QuickSync, and 454 of them have no third shop. Most people here aren’t here for the third shop.

A category. The attributes that category demands. At least one image of 300×300 or bigger. A package weight. Package dimensions. A title of 25 characters or more. Miss one and TikTok rejects the listing, and it rejects it whether we sent it or TikTok’s own channel did. A catalogue that exported cleanly to eBay last week can stop dead here, and that’s TikTok’s rule, not ours.

We fill in what we can. We ask TikTok which category it recommends for each product and take its answer, so nobody maps 2,000 items by hand. Weight and dimensions come from Shopify when you’ve entered them; Shopify only forces weight when you charge shipping by it, so on most catalogues that’s the field you’ll be typing in. Titles under 25 characters get padded so they go through, and the ones you write yourself read better than the ones we stretch. SKUs longer than 50 characters get cut to 50, because that’s TikTok’s limit against Shopify’s 255; give both shops the same SKU or nothing matches.

Then there’s the daily cap. A new TikTok seller can publish 100 products a day. If your first export stops at 100, it hasn’t failed; the rest is waiting for tomorrow. You can leave it, or switch on the drain: a job runs every six hours and sends up to the cap again until it’s through. A 2,000-product catalogue takes about twenty days that way, and everything already published is live and selling in the meantime.

TikTok only accepts a tracking number against a carrier that’s on your own shop’s shipping template. Before we send one we match the carrier name against that template, then against a table of regional aliases, then against a carrier-detection lookup. If nothing matches we record the number on the order instead of pushing a package TikTok would reject. Read your shipping template once when you connect, not after the first dispatch.

Prices go to TikTok with your rule applied. On Ultra and above that rule can be a fixed amount or a percentage above or below the Shopify price, so a launch price or TikTok’s fees don’t need a second catalogue. Listings can be created from Shopify and kept in step afterwards. Nothing is written to a live shop until you’ve looked at the match.