Supplier lead time is the gap between placing an order and receiving the goods, and it decides when you have to act, not just how much stock you currently hold. Before you turn a reorder decision into a buy list or a purchase order, the question to settle is whether the stock on hand will last as long as the supplier takes to deliver. A quick, reliable supplier lets a product run lower before you reorder. A slow or unreliable one means you order earlier and hold more buffer, even when the count on the shelf looks the same. Shopify does not work out a lead time for you. It records the pieces you read it from: the estimated arrival date you enter on a purchase order, and the date the order actually arrives. Stocky will not be available after August 31, 2026, and from that date you manage inventory in the Shopify admin and Shopify POS, so checking lead time before you buy is a habit you now run yourself. Here is what to check and record.
- Item needs a buying decision Read the on-hand count and the days of cover.
- Check the supplier's typical lead time From the order date to the actual arrival on past orders, not a round number you assume.
- Compare lead time with days of cover Cover shorter than lead time means the item is already late.
- Adjust urgency and buffer Hold a bigger buffer for a supplier that tends to slip.
Then:
- Buy now
- Watch
- Hold
Why supplier lead time changes reorder planning
Reorder planning is the work of deciding what to reorder, when, and how much, and lead time is the input that sets the when. Two products can show the same units on hand and still need action on different days, because the supplier behind one delivers in three days and the supplier behind the other takes six weeks. That is why lead time belongs in the plan as a real number, not a vague sense that some suppliers are slow. Shopify treats supplier timing as something you watch rather than something it computes: its supplier guidance suggests you compare suppliers on factors such as reliability, product quality, delivery times, and cost, and delivery time is the part that decides when each order has to go out. The wider frame of what, when, and how much is set out in reorder planning after Stocky; lead time is the thread that runs through the when.
Start with the item that needs a buying decision
Lead time only matters once you have an item that might need ordering, so start there rather than with the whole catalogue. Pick the product in front of you and read two numbers from the Shopify admin. The first is the current count: Shopify inventory CSV files can export current inventory quantities and update quantities for products in each location, so a CSV export gives you the on-hand figure without guessing. The second is how fast it sells, which turns that count into a rough horizon. Days of inventory remaining is an estimate of how long your inventory will last based on average sales rates, calculated as the ending quantity divided by the average quantity sold per day, and that horizon is what you hold up against the supplier’s lead time. For the running view of how long current stock lasts, see days of inventory remaining. Without those two numbers, lead time has nothing to push against.
Check how long the supplier usually takes
This is the step most plans skip: finding out what a supplier’s lead time actually is, rather than what you assume it is. Shopify gives you the raw material in the purchase order record. Shopify purchase orders track incoming inventory quantities, costs, payment terms, and an estimated arrival date, so the date you expect goods is written down when you place the order. The other half is what happened: when you receive a purchase order in Shopify, you record the quantities that actually arrived as accepted or rejected, which stamps the real arrival against the order. Read the gap between the estimated arrival date and the actual receiving date across the last several orders from a supplier, and you have a far better lead time than any single guess. None of this is a field Shopify fills in for you. It is a read you take from your own order history and keep next to each supplier. Turning that history into a steady reliability picture is its own routine, walked through in how to track supplier performance after Stocky. Recording how long each delivery takes from order to arrival, so the figure stays current as a supplier speeds up or slows down, is supplier lead time tracking.
Use lead time before you trust a reorder point
A reorder point is the stock level where you place the next order, and it is only as good as the lead time inside it. The point is sized so that what is left on the shelf covers the wait for delivery, which means a wrong lead time produces a wrong reorder point: too low and you stock out before the order lands, too high and you tie up cash you did not need to. So before you act on any reorder point, check the days of cover against the supplier’s typical lead time. When cover is shorter than lead time, the item is already late and goes to the top of the list. When cover is comfortably longer, it can wait. Shopify’s inventory reports summarize past sales and current stock to help you decide which products to prioritize when restocking, and they are not automatic reorder recommendations and do not calculate reorder quantities, so the comparison stays a judgement you make. Working out the action line itself, and the inputs behind it, is covered in Shopify reorder points after Stocky. When a supplier is the reason an order runs late, what to check before the next one is late suppliers and purchase orders.
Add supplier timing to the buy list before purchase orders
Once lead time has told you which items need action and when, that timing belongs on the buy list, not straight in an order. The buy list is where you group items by the supplier each one comes from, settle the quantity, and decide when each supplier needs to hear from you. Shopify suppliers are created in the admin when you create a purchase order, and grouping the list by supplier first lets a single order cover everything due from that supplier this round. The output of your planning each cycle is a short buy list after Stocky you review before buying, made supplier-ready by grouping and annotating each block, and kept current by a weekly reorder list. The purchase order comes last and records the decision: a Shopify purchase order records the products, their costs, and the quantities ordered from a supplier. For a fuller map of what the native order covers, see Shopify purchase orders after Stocky. One limit shapes the handoff: purchase order APIs aren’t currently available in Shopify and are under consideration, so an outside tool cannot create the order for you, and moving a reviewed buy list into the admin stays a hands-on step.
What to do when supplier reliability is uncertain
Sometimes you do not have a clean history to read a lead time from: a new supplier, a product you have not ordered in a while, or a supplier whose timing has been all over the place. The safe move is to assume a longer lead time and hold a bigger buffer until the history says otherwise, because the cost of being early is held stock while the cost of being late is a lost sale. Then build the record going forward, one received order at a time, so the next decision rests on evidence rather than hope. The wider set of supplier performance metrics you read from that history is its own review. Keeping stock topped up while you gather that history is the inventory replenishment after Stocky routine. One timing note frames all of this: historical Stocky data, including old purchase orders and stocktakes, will not move into Shopify automatically after the shutdown, so if past orders are where your lead-time reads live, export that history before the cutoff while Stocky still runs.
Supplier lead time checklist
Before you turn any item into a buy-list row or a purchase order, run it through the same short check. First, the current on-hand count, read from the admin export rather than memory. Second, the recent sales pace and the days of cover that follow from it. Third, the supplier’s typical lead time, taken from the gap between estimated and actual arrival on past orders, not a round number you once heard. Fourth, a buffer for variability, larger for a supplier who slips and smaller for one who is steady. Fifth, the grouping: which supplier the item belongs to, so its timing sits with the rest of that supplier’s order. Sixth, a one-line reason, so the decision is defensible when you later check what you ordered against what arrived. Once an item clears all six, its timing is settled and it is ready to join the order. For the wider question of which tools to lean on after Stocky, see what to use after Stocky.
Limitations
Checking supplier lead time before you buy is a planning habit, not a Shopify feature, and this guide does not cover every workflow Stocky used to support. It does not create Shopify purchase orders; those stay native to the Shopify admin, and lead time only shapes when you create one and how much you commit. None of this is demand forecasting, and the lead times and buffers you settle on are judgement calls a person reviews, not numbers to follow blindly. It does not promise that you avoid every stockout, overstock, or piece of dead stock, and it is not legal, accounting, tax, or financial advice. Shopify purchase orders, supplier and vendor records, inventory records, and supplier reliability notes still need source-backed checks against your own store. For the one slice where supplier reliability is the heart of the decision, the existing kijun app is one option, scoped honestly: it builds 0-100 supplier scorecards from purchase orders recorded in kijun, on supported supplier and vendor records, and it does not forecast demand or reorder for you. See how supplier scorecards work after Stocky.
This article was drafted with AI assistance and checked against cited sources through kijun’s editorial workflow. Last updated: 2026-06-29.
Stocky and Shopify are trademarks of Shopify Inc. kijun is not affiliated with or endorsed by Shopify.