Know why you're switching
Switching 3PLs is worth it when the problems are structural, not occasional. A bad week in peak happens everywhere; repeated mis-shipped shades, missing lot data, slow PR kitting or a minimum you can't afford are signs the fit is wrong.
Write down the specific failures before you start talking to new providers. That list becomes your requirements: if your current 3PL loses track of batches, the new one must show you lot-level inventory in its portal. If custom kits take weeks to quote, ask how a new provider handles kit requests. Switching without a clear reason often means swapping one set of problems for another.
Pick the right window
The best time to switch 3PLs is a slow sales period with no launch, collab or major promo in the next six to eight weeks. For most beauty brands, that means avoiding October through December and the weeks around any planned drop.
Check your own calendar for creator campaigns, PR seeding waves, wholesale shipments and restocks. Moving inventory while an influencer box wave is supposed to ship is a recipe for missed posts. Also review your current contract for notice periods, termination fees and how long the warehouse needs to release your inventory. Some agreements require 30 to 90 days' notice, so read it before setting a date.
Clean up your data first
A 3PL move goes smoothly when your product data is clean before anything is shipped. Build a master SKU file with one row per shade or variant:
- SKU, product name and shade
- Barcode (UPC or internal)
- Unit dimensions and weight
- Case pack quantity
- Lot or batch tracking required (yes or no)
- Expiry or PAO information if relevant
- Shipping restrictions, such as flammable or aerosol
- Packing notes, like bag liquids or keep upright
Fix duplicate SKUs, missing barcodes and shades that share a code. These issues are annoying at your current warehouse; at a new one they cause receiving delays and wrong picks.
Plan the inventory transfer
Moving inventory between warehouses works best in a planned sequence, not a single truck. There are two common approaches.
A split transfer sends fast-moving shades to the new 3PL first while the old one keeps shipping. Once the new site is receiving and shipping cleanly, the remaining stock follows. This approach reduces stockout risk but requires routing orders to two places for a short time.
A hard cutover stops shipping at the old warehouse, moves everything and restarts at the new one. It is simpler but means a short shipping pause, so it suits brands with modest volume who can communicate a delay.
Either way, request a full inventory report with lot numbers from the outgoing 3PL, and have the new one count against it on arrival.
Carry over lot and batch records
Lot and batch records must move with your inventory, especially for cosmetics. If a customer reports a reaction or you need to pull a batch, you need to know which lot shipped to which order, including orders shipped by your previous provider.
Export order history with lot numbers from your current 3PL before your account closes, and store it yourself. Make sure every pallet or carton arriving at the new warehouse is labeled with SKU and lot, and that lots are received as separate inventory records rather than merged. If any inventory arrives unlabeled, have it quarantined until the lot is confirmed.
Reconnect integrations and test
Integrations are the part of a switch that customers feel first if they fail. Before go-live, connect your storefront and any marketplaces to the new 3PL, map every SKU and run test orders.
Test the cases that actually happen in beauty:
- Single-unit orders and multi-shade orders
- Bundles and gift sets
- Orders with a free gift line item
- Subscriptions, if you run them
- Orders containing a flammable item like nail polish
- Address edits and cancellations
Confirm tracking numbers sync back to the store and that customers receive shipping notifications. Turn off fulfillment at the old 3PL only after the new connection is confirmed, so no order gets sent to both or neither.
Communicate with customers and your team
A short note on your site and in order confirmations prevents most support tickets during a move. If you are pausing shipping for a few days, say so before checkout rather than after. If you are running two warehouses temporarily, warn your team that tracking may come from two locations.
Internally, assign one person to own the move and hold a short daily check-in with the new 3PL for the first two weeks. Track receiving progress, order backlog and any exceptions until shipping is stable.
Audit the first 30 days
The first month after a switch tells you whether the move worked. Check order accuracy, shipping times, inventory counts against your records and how quickly the new team answers questions. Spot-check a few orders yourself by ordering to a friend's address.
Reconcile final inventory with the old 3PL too. Make sure every unit was shipped, transferred or accounted for, and that you received any remaining stock, inserts and packaging. Close the old account only when the numbers match.
Frequently asked questions
How long does it take to switch 3PLs?
Most beauty brands should plan for four to eight weeks from signing with a new 3PL to stable shipping, depending on SKU count, inventory volume, notice periods and how clean the product data is.
Will I lose sales when switching 3PLs?
Not necessarily. A split transfer, where the new warehouse starts shipping fast-moving SKUs before the old one stops, can avoid any shipping pause. A hard cutover is simpler but usually involves a short delay.
What should I get from my old 3PL before leaving?
Get a final inventory report with lot numbers, full order history with lot and tracking data, and any packaging, inserts or marketing materials you stored with them. Keep copies of everything before your account access closes.