Fulfill Team·Updated September 29, 2026·Add Fulfill as a preferred source on GoogleTo switch 3PL providers without breaking fulfillment, work in this order: measure your current 3PL against its service level agreement, read your contract for the notice window, exit fees and inventory lien, sign and connect the new provider before any stock moves, send a test batch, move inventory in waves while both warehouses ship, reconcile the counts, and only then turn the old provider off. The same steps apply whether you call it a 3PL or a fulfillment provider.
This guide covers each step in detail, the contract terms that cause the most trouble, the KPIs and scorecard to judge your current 3PL before you leave, and how to track the new one so you are not switching again next year.
One bad week is not a reason to move. A pattern is. These are the patterns worth acting on, and each one should show up in your data, not just your inbox.
Frequent fulfillment errors, like wrong items, late shipments or damaged goods, cost you customers and, on marketplaces, chargebacks. A reliable 3PL catches its own errors, owns them and fixes the cause. If you are the one finding the mistakes, that is the sign.
If your 3PL can't handle promotions, seasonal spikes or steady growth without backlogs, you lose sales at exactly the moment demand is highest. Ask how it staffed your last peak and whether it can show you the numbers.
Without real-time inventory, tracking and a clean integration with your store, you run your business on stale data. In the 2026 Annual Third-Party Logistics Study, 90% of shippers ranked technology capabilities among the most critical factors in choosing a 3PL.
If your invoices keep rising and service does not improve, compare your real cost per order against the market. Our 3PL pricing guide shows typical fee structures, and the fulfillment cost calculator estimates a per-order figure you can hold your invoices against.
Late deliveries, wrong orders and slow refunds show up in reviews before they show up in reports. When complaints about shipping arrive faster than your 3PL's own alerts, the relationship is not working.
Elm Dirt, an organic fertilizer brand, saw several of these signs at once. Its first 3PL looked good on paper. "In the fourth month, they stopped shipping our product altogether, and we couldn't get a hold of anyone," founder Lauren Cain told us. Refund requests and a 10% drop in revenue followed before the brand moved.
Before you leave, measure. A scored review tells you whether the problem can be fixed under your current contract, gives you the written record a performance-based exit clause needs, and becomes the standard your next 3PL is held to. Pull at least the last few months of data from your 3PL's reports, your store platform and your carrier tracking, and work out the KPIs below yourself rather than relying on the 3PL's summary.
| KPI | What it measures | How to calculate it | Reference point |
|---|---|---|---|
| Order accuracy | Orders shipped with the right items, quantities and address | Orders without an error ÷ total orders shipped | WERC 2025: the top 20% of warehouses reach order picking accuracy of 99.68% or better |
| On-time shipment rate | Orders that leave the dock by the cutoff in your SLA | Orders shipped on time ÷ total orders shipped | WERC 2025: the top 20% ship 99.5% or more of orders on time |
| Inventory accuracy | How closely the 3PL's system matches what is on the shelf | Units matching the system at a count ÷ units counted | Set it in your SLA and check it with cycle counts |
| Dock-to-stock time | How fast received inventory becomes sellable | Time from arrival at the dock to available in the system | WERC 2025: the top 20% take under 3.5 hours |
| Internal order cycle time | How long an order takes inside the warehouse | Time from order release to shipment | Set it in your SLA as a daily order cutoff |
| Return processing time | How fast returns are inspected, restocked and reported | Time from return received to restocked or disposed | Set it in your SLA; slow returns delay refunds |
| Cost per order | What you really pay to ship one order | All 3PL invoices for the period ÷ orders shipped | Compare against your contract rates and the market |
| Issue resolution time | How fast problems and tickets get closed | Average time from ticket opened to resolved | Set it in your SLA, with an escalation path |
The WERC figures come from warehouses of every kind, not just ecommerce 3PLs, so treat them as a sense of what strong operations reach rather than as a contract term. The target that binds your 3PL is the one written in your service level agreement.
A scorecard turns those KPIs into one number you can track each month. Pick five or six metrics that matter most to your customers, give each a weight, and score each month's result against its target. The weights below are an example only. A brand with a lot of subscription orders might weight on-time shipping higher, and a brand with high-value goods might weight accuracy and damage higher.
| Metric | Weight (example) | Target | Score |
|---|---|---|---|
| Order accuracy | 30% | Your SLA target | 3 above target, 2 at target, 1 below |
| On-time shipment rate | 25% | Your SLA target | 3 / 2 / 1 |
| Inventory accuracy | 20% | Your SLA target | 3 / 2 / 1 |
| Issue resolution time | 15% | Your SLA target | 3 / 2 / 1 |
| Cost per order vs. quote | 10% | Within your agreed rates | 3 / 2 / 1 |
Multiply each score by its weight and add them up. A total of 2 means your 3PL is meeting the agreement; a total that stays below 2 month after month is your signal to renegotiate or start planning an exit. Review the scorecard monthly with your account manager and in more depth once a quarter.
For the qualitative side, such as technology, communication, scalability and sustainability, use our 3PL provider questions tool to build the list of questions to put to your current 3PL and to the ones you are considering.
If the scorecard shows gaps but the relationship is still workable, try to fix it before you move. Switching has real costs, and a 3PL that knows the numbers are being watched often improves.
If the deadline passes without improvement, you have your answer, and a documented reason to leave.
The cleanest moment to switch is the end of your contract term, when no early-termination fee applies. Many shippers let that moment pass: in the 2026 Annual Third-Party Logistics Study, a little over half of shippers said they do not rebid their business when a contract ends. Put the renewal date and the notice deadline in your calendar now, even if you plan to stay.
Moving during the holidays, a big sale or your own seasonal peak puts your highest-volume weeks on a warehouse that has never shipped your products. Plan the cutover for a quieter stretch, and finish it well before peak so the new 3PL has time to learn your orders.
Time the move around your purchase orders so new stock can go straight to the new warehouse instead of being received twice. This keeps your supply chain flowing and reduces the amount of inventory that has to be transferred.
Build the schedule with your new 3PL: go-live date, inventory transfer dates, test windows and who owns each task. A shared plan with named owners is what keeps a transition from stalling.
Most painful switches go wrong in the contract, not the warehouse. Read these clauses before you tell your current 3PL anything.
When you sign with the new 3PL, negotiate your way out in advance. Exit terms are common in strategic 3PL contracts.
Before you shortlist anyone, write down what the next 3PL must do. Use your scorecard results as the starting point, since the gaps you measured are the requirements.
Choosing the right 3PL partner is critical for long-term success:
If you are moving off ShipBob, see how the main ShipBob competitors compare before you shortlist.
Featured tool spotlight: One of the most overlooked steps when switching 3PLs is rebuilding your data connections. Connex automates the integration between your new 3PL, your sales channels, and your accounting system, so fees, refunds, and split shipments sync correctly from the start, not months later after a reconciliation headache.
Give one person on your team ownership of the whole move, from contract to final count. A switch touches operations, customer service, finance and your store setup, and without a single owner the handoffs between them are where things get missed. The plan should cover:
Everything the new warehouse needs to ship an order should be in place before the first pallet arrives:
Send a small batch of inventory first and push real orders through it, end to end.
Do not move everything at once. Split the transfer into waves so one warehouse can always ship every SKU. Count each wave when it leaves the old 3PL and again when the new one receives it, and compare both counts against the old 3PL's last inventory report. Any gap should be resolved while both parties still have the paperwork.
While inventory is in transit, both warehouses ship. Route each order to whichever one holds the stock, and shift the share to the new 3PL as its inventory builds and its scores hold up. When you cut over, switch order routing in your store and marketplaces, update your return address and ship-from settings, and disconnect the old 3PL's integration so no order is shipped twice.
Finish with a full count of anything left at the old warehouse, pay the final invoice so nothing is held under the lien, download your order, inventory and returns history, and revoke the old 3PL's access to your store and systems.
The whole switch on one list, in order:
Clear communication keeps the switch from surprising anyone.
If product and inventory data do not match between the two providers and your store, you get overselling, stockouts and wrong shipments.
Hidden fees in a new 3PL contract can erase the savings you switched for.
Skipping tests means your customers find the problems for you.
Shutting the old provider down before the new one has shipped at full volume leaves you with no fallback. Keep the overlap until the new 3PL's first weeks of scores meet your targets.
An unpaid final invoice can hold up your inventory, and a missed notice deadline can renew a contract you meant to leave. Both are avoidable with a calendar and a budget line.
Run the same scorecard on the new 3PL from its first week. The first few months tell you whether the switch worked, and the history you build is what your next review, or your next negotiation, rests on.
A named account manager is the person who owns your scorecard on the 3PL's side. A good one sends regular performance reports, flags problems like a stock shortfall or a carrier delay before they reach your customers, adapts processes as you add products or channels, and runs the quarterly review. If your new 3PL cannot name that person before you sign, treat it as a warning.
Fulfill.com matches eCommerce brands with 3PLs that fit their products, order volume and locations.
After its first 3PL stopped shipping, Elm Dirt came to Fulfill.com for a shortlist of 3PLs that fit, with the strengths and weaknesses of each, and chose its new partner from it. With the new 3PL, the brand gets inventory reports every day, which it lacked before, and its average support ticket resolution improved by four days. Read the Elm Dirt case study.
Switch when a documented pattern of misses, such as accuracy, on-time shipping, inventory errors or cost, continues after you have raised it and agreed a deadline to fix it. The best moment is usually your contract's end date, outside your peak season.
It depends on your contract's notice period, how many SKUs and integrations you have, and how much inventory has to move. The notice window is often the longest step, which is why you should find it before you start shopping.
It can if invoices are unpaid. Under UCC § 7-209, a warehouse has a lien on stored goods for its storage, labor and related charges, and it gives up the lien on goods it voluntarily releases. Pay the final invoice, or agree on terms in writing, before the last pickup.
Ask how it measures and reports accuracy and on-time shipping, what its onboarding and receiving process looks like, which of your platforms it already integrates with, what every fee is, and who your account manager will be. Our 3PL provider questions tool builds a full list.
Usually because the counts never matched in the first place. Common causes are units lost or miscounted in transit, SKU and barcode data that did not map cleanly, stock received but not yet put away, and orders shipped from both warehouses during the overlap. Count each wave at both ends, reconcile against the old 3PL's final report, and run cycle counts in the first weeks.
Order accuracy, on-time shipment rate, inventory accuracy, dock-to-stock time, internal order cycle time, return processing time, cost per order and issue resolution time. Weight five or six of them into a monthly scorecard.
Pull the month's orders, shipments, inventory counts and invoices; calculate each KPI yourself; score it against the SLA target; and review the result with your account manager. Check every invoice line against your contracted rates.
Switching 3PL providers is a project, not an emergency, when you run it in order: measure, read the contract, set up the new provider, test, move in waves, and close out cleanly. Keep scoring your 3PL after the switch and you will know early whether the relationship is working.
If this is your first time outsourcing rather than a switch, start with our guide to working with a 3PL for the first time.
Need help finding the right 3PL for your products and order volume? Tell us what you ship and get matched with 3PLs that fit.
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