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Ship date vs cancel date: what they mean on a wholesale PO

Almost every wholesale purchase order carries two dates: when the store wants the goods to leave, and the last day it will accept them. Mixing them up, or losing them, is one of the easiest ways to lose an order you already won. Here is what each date means and how to keep track of them.

By Ram, founder of Orderseam · October 13, 2026 · 6 min read

What is the ship date on a wholesale PO?

The ship date, often written as "start ship", "ship on" or "available date", is the earliest day the store wants the order to leave your warehouse. Stores plan their floor space and their cash around it: they want spring stock to arrive when spring sets go up, not six weeks early when the stockroom is full and the invoice clock is already running.

Shipping before the ship date is usually allowed only if the buyer agrees. Some stores accept early shipments and simply start the payment terms later; others refuse them. If you're ready early, ask first.

What is the cancel date?

The cancel date, sometimes "cancel if not shipped by" or "complete by", is the last day the store will accept the order. If it hasn't shipped by then, the store has the right to cancel it, refuse the delivery, or ask for a discount to keep it. For seasonal goods this matters a lot: a store that receives coats in January has lost most of the season to sell them.

On some POs the cancel date means "must ship by" and on others "must arrive by". If the PO doesn't say, ask, and assume the stricter reading until you know.

What is a ship window?

The days between the ship date and the cancel date are the ship window. A window of a few weeks is common. The order is "on time" if it ships inside the window.

At-once (immediate) orders often have a short window or no start date at all, while pre-book orders placed at market can have start dates months away.

What happens if you ship after the cancel date?

• The store can cancel the whole order or the late part of it, and you're left holding the stock.
• The delivery can be refused at the door, and you pay for shipping both ways.
• The buyer may ask for a markdown to keep it, eating into your margin.
• It costs trust. Buyers remember which brands ship on time when they plan the next season.

None of this is automatic. Many buyers will extend a date if you ask before it passes. The key word is before.

How do brands keep track of ship and cancel dates?

1. Record both dates the day the PO arrives, on the order itself (in a Shopify draft order, the notes or tags work well), not just in the PO file.
2. Check the window against your lead time before you confirm the order. If you need three weeks to pick and pack and the cancel date is in ten days, say so now.
3. Sort open orders by cancel date, not by the date they came in, so the most urgent ones are always at the top.
4. Ask for an extension in writing as soon as you know you'll miss the window, and record the new date on the order.
5. Split the shipment if it helps. Shipping what's ready inside the window and backordering the rest (with the buyer's OK) is often better than shipping everything late.

Where to find the dates on a messy PO

Buying systems, spreadsheets and hand-written forms all put dates in different places. Look for labels like "Start", "Ship", "Delivery", "Cancel", "Complete" or "Do not ship after". Dates may be written month first or day first, so a date like 03/04 needs checking against the season. Some POs give one window for the whole order; others give a different window per line, for example early and late deliveries on the same order. For a full pre-invoice check, see 10 things to check on every wholesale PO before you invoice.

Common questions

Can I ship a wholesale order before the ship date?

Only if the buyer agrees. The ship date is the earliest day the store wants the goods. Some stores accept early shipments, others refuse them or start the payment terms later, so ask before you ship early.

Does the cancel date mean ship by or arrive by?

It depends on the store. Many use it as the last day to ship, some as the last day to arrive. If the PO doesn't say, ask the buyer and plan for the stricter reading until you know.

What should I do if I can't ship before the cancel date?

Tell the buyer before the date passes and ask for an extension in writing, or offer to ship what's ready now and the rest later. Then record the new date on the order.