You’ve decided to outsource fulfillment. Now comes the part that keeps most business owners up at night: actually moving everything. Your inventory has to leave one building and arrive at another, your store has to start sending orders somewhere new, and your customers expect their packages to show up on time no matter what’s happening behind the scenes. The good news is that switching to a 3PL doesn’t have to mean a week of chaos. With a clear plan and the right fulfillment partner, most brands make the move without a single customer noticing.
What’s the Biggest Risk When You Switch to a 3PL?
The biggest risk isn’t lost inventory. It’s the gap: the days when your stock is on a truck or being received at the new warehouse, and orders keep coming in. If nobody plans for that window, orders pile up, ship late, or get missed entirely.
Every step below is designed to shrink that gap or cover it, so your customers keep getting their orders while the move happens in the background.
Step 1: Clean Up Your Product and SKU Data
Before a single box moves, make sure your product catalog is accurate. Your 3PL will set up every item in its system based on the data you send, so errors now become shipping errors later.
- Confirm every product has a unique SKU and a scannable barcode. If you need UPCs, GS1 US is the official source.
- List dimensions and weights for each item and each case pack.
- Flag anything that needs special handling, such as fragile items, liquids, items with lot numbers or expiration dates, or products that should be stored in a climate-controlled space.
- Note any kits, bundles, or inserts that go into specific orders.
Step 2: Count Your Inventory Before It Moves
Do a full physical count before anything ships. It’s tempting to trust the numbers in your system, but most in-house warehouses drift over time. A clean count gives your 3PL a baseline to check against when your inventory arrives, and it makes any discrepancies easy to spot and resolve.
If you’re wondering why this matters so much, think of it this way: if your count is off by fifty units before the move, you’ll spend the first month wondering whether the 3PL lost them. A clean count protects both of you.
Step 3: Connect Your Store and Sales Channels
Your 3PL needs to receive orders automatically from wherever you sell. ShipWizard connects with more than 60 shopping carts, marketplaces, and platforms, including Shopify, Amazon, Walmart, and more.
Set up and test these connections before your inventory arrives. Place a few test orders, confirm they appear in the 3PL’s system, and check that tracking numbers flow back to your store. That way, the only thing left to do on switch-over day is turn on live orders.
Step 4: Ship Your Inventory in Waves, Not All at Once
This is the single best way to avoid missing orders. Instead of moving everything in one day, move it in stages:
- Send your slower-moving products first. They’re the least likely to be ordered during the move.
- Keep a few days of your best sellers on hand and keep shipping those yourself.
- Once the first wave is received and counted at the 3PL, send the rest, including your top sellers.
- Switch order routing to the 3PL once everything is in stock there.
If your current warehouse is close to your new 3PL, this gets even easier. For example, a brand in Pompano Beach or Boca Raton can move stock to ShipWizard’s Fort Lauderdale facility by truck in a single afternoon.
Step 5: Pick a Quiet Week for the Switch
Timing matters. Avoid switching right before a big sale, the holiday season, or a major retail order. Mid-week is usually better than a Friday, since any small issues can be fixed before the weekend. Let your customer service team know the plan, so they can answer any questions about tracking or timing while the move is underway.
Step 6: Don’t Forget Returns, Amazon, and Wholesale Orders
Direct-to-consumer orders get most of the attention during a move, but they’re not the only thing that needs a new home. Before you switch, update:
- Your return address on packing slips, return labels, and your website, so returns go straight to the 3PL.
- Your Amazon ship-from settings, if you’ll use FBA prep or FBM fulfillment.
- Any routing guides or pickup details for retailers and distributors, so your wholesale and retail orders keep moving on schedule.
Step 7: Watch the First Two Weeks Closely
Once live orders are flowing, check in daily. Compare orders received to orders shipped, spot-check inventory counts, and review any exceptions with your account manager. Most issues in a new setup are small, like a missing barcode or a product that needs a different box, and they’re easy to fix when they’re caught early.
How Long Does It Take to Switch to a 3PL?
For most brands, the process takes a few weeks from signed agreement to first shipped order. Brands with a small, clean catalog can move faster. Brands with hundreds of SKUs, kits, lot tracking, or several sales channels should plan for a little more time. Either way, a good 3PL will give you a timeline up front and a point of contact who walks you through it.
FAQs Business Owners Often Ask About Switching to a 3PL
Will my customers notice the switch?
Not if it’s planned well. Moving inventory in waves and testing integrations ahead of time means orders keep shipping throughout the move. Most customers won’t notice a thing.
Do I have to move all my inventory at once?
No, and it’s usually better not to. Moving in stages lets you keep shipping your best sellers while the rest of your stock is received and counted.
What if something goes wrong during the move?
That’s what your dedicated account manager is for. With a clean inventory count and tested integrations, any issue can be traced quickly, whether it’s a short shipment, a missing SKU, or an order that didn’t sync.
Ready to switch but worried about disrupting your customers? Don’t let the fear of a messy move keep you stuck running your own warehouse. Get a free fulfillment quote from ShipWizard today and see how our onboarding team helps brands move their inventory, connect their stores, and start shipping from our Florida and Arizona warehouses without missing an order.
