How to Switch 3PLs Without Breaking Your Business

By Menachem ChayempourPublished October 7, 2026 10 min read

Switching 3PLs is expensive. Here's how to tell whether you should, what to check in your contract, how to move inventory, and how to cut over without losing orders.

Switching 3PLs is one of the most expensive operational moves a brand makes. You pay to move inventory, you pay two warehouses for a while, your integration gets rebuilt, and your error rate goes up while a new team learns your SKUs.

Done right, it's worth it. Done for the wrong reason, or at the wrong time, it's a lot of money spent to end up with the same problems in a different building.

Here's how to tell whether you should switch, and how to do it without breaking your business.

Step 1: Make sure the 3PL is actually the problem

A brand told me once they were leaving their 3PL because "they don't care about us."

I asked for examples.

"They take a while to respond to emails sometimes."

"How long?"

"Like, four or five hours."

This brand shipped about 800 orders a month and paid around $6,000 a month in fulfillment fees. Their 3PL had a 99.7 percent accuracy rate and had never missed a ship deadline. They were about to leave a warehouse that was executing well, because the account manager didn't reply within two hours.

Slow email replies are a resource constraint. These are a partnership failure:

Inventory counts that keep coming up wrong
Missed SLAs and ship deadlines
Invoices that don't match the quote
Being blamed for their mistakes
Silence when something goes wrong

If you have the first problem and none of the second list, have a direct conversation before you start a search. A lot of fixable issues get "fixed" with a move.

And if you're on your third or fourth 3PL in a few years, look at your own side too. I once had a brand ask for recommendations, and when I asked how many 3PLs they'd worked with, the answer was that we'd be finding their fifth in three years. I didn't send recommendations. One bad 3PL relationship happens. Five usually means something on the brand's side needs to change first: unrealistic expectations, volume forecasts that don't hold up, late payments, or changes nobody tells the warehouse about.

Step 2: Know the real reason you're leaving

Write it down in one sentence. It decides what you look for next.

Wrong category fit. You're shipping fragile, frozen, regulated, or oversized product from a generalist building. Look for a specialist.
Outgrew them. Their systems, capacity, or carrier options can't keep up. Look for a provider where you'd be a meaningful account with room to double.
Cost. Get a real comparison before you assume someone else is cheaper. The cheapest rate card is often not the cheapest invoice.
Quality. Errors and damages. Ask what changed, because sometimes it's their staffing and sometimes it's your product mix.

One version of "quality" deserves a warning. A brand once told me their favorite thing about their 3PL was that it was "super flexible, they'll do anything we ask." Six months later they were shopping for a new provider because errors were everywhere. Flexible often means no standard process. If that's why you're leaving, don't pick the next 3PL for being flexible.

Step 3: Read your current contract before you give notice

Pull the contract out before you say anything to your 3PL. You're looking for:

Termination notice. How many days, and whether notice has to be in writing to a specific person.
Early termination fees. How they're calculated.
Auto-renewal. If the renewal date is close, your notice window may already be closing.
Minimums during the notice period. Some contracts keep charging your monthly minimum even as your volume drains out.
Outbound and exit fees. What it costs to pick your inventory, build pallets, and load it onto a truck. These add up on a full move.
Data access. What you get when you leave: order history, inventory logs, lot and expiration data.
Liens on your inventory. Many warehouse contracts let the warehouse hold your goods against unpaid invoices. Make sure your account is current before the move, and settle any billing disputes early.

If the contract is silent on data or exit fees, that's worth knowing now rather than on moving day.

Step 4: Pick the new 3PL before you tell the old one

Have your new provider selected, contracted, and onboarding before you give notice. You don't want to be mid-search with a termination date coming at you.

Run the search properly this time. Shortlist on category fit, have every provider price one real month of your data on the same template, and check references with a client in their first year. Our guides on how to choose a 3PL, the 3PL RFQ process, and the evaluation scorecard walk through each piece.

Give the new 3PL your real numbers. A 3PL once quoted a brand at its stated volume of 3,000 orders a month. The first three months came in at 1,100, 900, and 1,050. The 3PL was losing money on the account, and that relationship was never going to last. Inflated forecasts get you a nice rate and a short relationship.

Step 5: Pick your timing

Avoid moving in or right before your peak season. For most ecommerce brands that means getting the move done well before Q4, or waiting until after it. A move during peak stacks every risk at once: receiving backlogs, new staff, and your highest order volume.

Also plan around your inventory cycle. The easiest time to move is when inventory is low and a big inbound shipment is about to land, because you can send that shipment straight to the new warehouse.

Step 6: Choose how to move the inventory

There are three common approaches.

All at once. Pick a cutover date, stop shipping from the old warehouse, move everything, and start shipping from the new one. Fastest and simplest to manage, but expect a few days where orders are delayed. Best for smaller SKU counts.

Drain and fill. Send all new inbound inventory to the new 3PL while the old one ships out what it has. Turn off the old warehouse once it's nearly empty, then move the remainder. Less disruption to customers, but you're paying two warehouses longer and managing inventory in two places.

SKU by SKU or channel by channel. Move one product line, or one channel like wholesale, at a time. Useful for complex catalogs and retail programs. Slower, and it takes careful routing so orders go to the warehouse that has the stock.

Step 7: Protect your inventory count

This is where switches go wrong most often.

Count everything before it leaves. Ask for a full physical count at the old warehouse and get it signed off.
Count everything when it arrives. The new 3PL should count on receipt and report discrepancies by SKU.
Set a deadline for disputes. Agree with both warehouses on how long you have to raise a discrepancy and what documentation is needed.
Export your data. SKU master, inventory by location, lot and expiration data, open orders, and order history.

If counts don't match and you didn't document the starting number, you'll have no way to prove where the units went.

Step 8: Cut over your systems carefully

Connect your store and marketplaces to the new 3PL's system and test it with real orders before go-live.
Set up the new warehouse as its own inventory location, so orders route to the building that actually has the product.
Don't turn off the old integration until the old warehouse has shipped its last order. Turning it off early strands orders. Leaving it on too long risks shipping the same order twice.
Run through the edge cases on the new setup: an address change, a cancellation, a split shipment, a bundle, and a return.

Step 9: Tell the people who need to know

Retailers and wholesale partners. Your ship-from address, carrier setup, and sometimes your vendor setup change. Retailers may need advance notice.
Amazon. Update your ship-from address for FBA shipments and any merchant-fulfilled settings.
Suppliers and freight forwarders. New delivery address, new receiving hours, new appointment rules.
Your customer service team. Expect a short bump in "where's my order" questions around the cutover.

Step 10: Run the first 90 days on purpose

Set up weekly check-ins with a named contact at the new 3PL for the first three months. Track ship time, order accuracy, dock-to-stock time, and invoice accuracy against the quote. Expect some errors early. What matters is whether each one gets fixed at the process level, so it doesn't happen twice.

And be the client they want to keep. A 3PL owner once told me he fired his biggest client, 22 percent of his revenue, even though they paid on time. Every error, including ones caused by the brand's own systems, turned into a 45-minute call demanding explanations, and his best account manager asked to be reassigned twice. How you handle the first few mistakes sets the tone for the whole relationship.

Switching checklist

Frequently asked questions

How long does it take to switch 3PLs? Plan for one to three months from signed contract to full cutover. It takes longer with a big catalog, retail EDI, regulated product, or a custom integration.

How much does it cost to switch 3PLs? Budget for exit fees at the old warehouse, freight between buildings, receiving and setup fees at the new one, integration work, and a period of paying two warehouses. Price those before you decide the savings are worth it.

Should I tell my current 3PL I'm looking? Not until you've chosen the new provider and read your contract. After that, give notice professionally and in writing. You'll need their cooperation to get your inventory out cleanly.

When is the best time of year to switch 3PLs? For most ecommerce brands, well before or after Q4. Avoid moving during your own peak season.

Can I run two 3PLs at once? Yes, and some brands keep two for good reasons, like a second region or a separate channel. During a switch, running both for a few weeks is normal.

Want help with the move?

Picking the right next 3PL is the part that decides whether you're switching again in two years. We match brands with vetted 3PLs on operational fit, normalize every quote to the same line items, and stay involved through onboarding. Providers pay our fee. Brands put down a refundable deposit so we only take on serious searches, and when you sign, we pass it to your 3PL as a credit on your first invoice.

Tell us what you ship, and tell us why you're leaving. We'll be honest with you if we think the fix is a conversation with your current 3PL instead.

Share LinkedIn Twitter Email

Never miss a week of logistics intel

Weekly analysis on 3PL capacity, freight rates, and fulfillment costs — read by 21,000 logistics professionals.