Switching Apparel 3PLs

Most of the risk in a 3PL switch is in the handoff. The current warehouse controls your inventory and your data until the day you leave, so get what you need while relations are still normal.

Read your agreement

Find the notice period, the rules for releasing inventory, any exit or pallet-out charges, and what the final invoice will include. Build your timeline backward from those terms.

Export by variant

Pull on-hand quantity for every SKU, size and color. Include open orders, backorders, held orders, unprocessed returns, and anything marked damaged. Save it with a date. That file is what you reconcile the new warehouse's receiving against.

Clean your SKU list

A move is the right moment to retire dead variants and fix inconsistent names. A clean list makes slotting at the new warehouse cleaner and keeps pick errors down from day one. See size and color variants explained.

Check your barcodes

Every size and color should carry its own scannable barcode on the unit or its bag. If your current warehouse relabeled your goods with its own internal labels, ask what will come off and what stays. See apparel barcodes.

Most clients go live with OC3PL within five to ten business days, depending on complexity. The full transfer of a large catalog can take longer than go-live, because you keep shipping from cover stock while the last waves arrive.

The goal is simple: at every moment, every variant you are selling should be on a shelf at a warehouse that is receiving those orders. The way to get there is cover stock and careful routing.

• Keep enough of each fast-selling variant at the old warehouse to cover orders while freight is in transit.
• Move slow and seasonal stock in the first wave if you can, so the old warehouse keeps the sellers.
• Do not run a promotion or a drop during the move.
• Watch the variants that sell out first, and adjust the next wave if a size runs low.
• Hide or pause variants that are physically in transit, rather than overselling them.

Labeled, scheduled inbound shipments are received and slotted within one business day at OC3PL, so the gap you are covering is the transit time, not the receiving time.

A switch often reveals problems the old warehouse was carrying: units counted but not on the shelf, sizes in the wrong bin, returns that were never put back. Reconciliation is how you find them.

At OC3PL each inbound is checked against your advance shipping notice, every SKU is photographed, and anything that does not match is flagged in your portal. You get a clear list of differences instead of a surprise six weeks later.

Compare the received counts with your export, variant by variant. Where they differ, ask the old warehouse for an explanation before the final invoice. The photos give you evidence. Read more in receiving and inventory accuracy and apparel inventory accuracy.

Your account manager will watch the first weeks closely, on site. You should watch them too. These are the signals that tell you the move worked.

Hold a short regular call with your account manager during the first weeks. Most small problems in a move are setup details that take minutes to fix once someone sees them.

Inventory is the heavy part of a move, but the integration is the delicate part. For a short window, orders have to flow to the right warehouse, tracking has to flow back, and nothing can be sent twice or not at all.

1. Connect your store to the new warehouse while the old one is still shipping.
2. Map every variant, size by size and color by color, to its barcode.
3. Run test orders end to end, including a multi-item order and a bundle.
4. Agree the cutover moment with both warehouses: the last order the old one ships, the first order the new one ships.
5. Switch order routing for the variants that have arrived. Keep the rest routed to cover stock.
6. Check that tracking numbers are coming back to the store and the customer emails are going out.
7. Watch held orders, partial orders and backorders through the switch. These are where gaps hide.

If you sell on more than one channel, cut each one over deliberately. A Shopify store, an Amazon account and a wholesale portal can each be switched on a different day if that keeps the risk down. See switching 3PL integrations without downtime and one apparel inventory across channels.

Your old warehouse may have learned your quirks over months. The new one needs them on day one. Write them down and send photos.

• How each item is folded, and which items go in their own bag.
• Which inserts, stickers and cards go in which orders.
• How bundles, gift-with-purchase offers and free items are triggered.
• Which items need a box instead of a mailer.
• Your return policy, and what counts as restockable.
• Wholesale accounts and their packing or labeling rules.
• Your drop calendar for the next few months.

At OC3PL packing follows your own standard operating procedures for folding, bagging and packing. The clearer the instructions, the more consistent every packer is. See apparel packaging and unboxing.

A switch is not free, but most of its cost is predictable once you know where to look. List these before you choose a date, and ask each warehouse how it bills for its part.

• Outbound charges at the old warehouse for picking and loading your inventory.
• Freight between the two buildings, by pallet or by carton.
• Receiving at the new warehouse. Labeled, bagged cartons with an advance shipping notice cost less to receive than loose goods.
• Two storage bills for the weeks when stock sits in both places.
• Any exit or early termination terms in your old agreement.
• Your own team's time on data, integration testing and customer service.

The biggest saving is usually the inbound condition. If your stock leaves the old warehouse in clean, labeled cartons by variant, receiving is fast. If it leaves in mixed boxes, someone has to sort it. Ask the old warehouse how it will pack your inventory out, and get that in writing with the release terms. At OC3PL there are no setup fees, invoicing is weekly, and storage is pro-rated daily from the day stock arrives.

Customer service, marketing, wholesale and finance all feel a warehouse switch. Tell them early and give each one what they need.

The calmer the inside of the business is during a move, the less your customers notice it.

• Giving notice before exporting your data.
• Switching right before a drop, a collab release or Black Friday.
• Moving all inventory at once, with nothing left to cover orders in transit.
• Forgetting the return address in the store, the returns app and the packing slip.
• Leaving dead variants in the catalog so they get slotted and counted at the new warehouse.
• Not telling the new warehouse about packing instructions, inserts and bundles before go-live.
• Choosing on price without asking who answers when something goes wrong.

If you are leaving because nobody answers, see what changes when your account manager is on site and switching from a national 3PL network.