What to Look for in a 3PL Warehousing Partner

Executive Summary

Warehouse space has got tighter and pricier in 2026, cargo theft losses have doubled, and retailer chargebacks haven’t softened. In other words, the 3PL warehousing partner you pick now sets your service levels for three years. Ask these six questions before you sign: how much space the provider controls, whether it can hold freight in bond, what its technology connects to, how it secures idle cargo, whether it can hit retailer compliance numbers, and who staffs the building, on what terms.

Intro

Somewhere in your inbox is a 3PL proposal with a U.S. map on page two, 12 pins spread coast to coast, and just enough vagueness to make “national network” sound a lot like “we know a guy.”

Once upon a time, that was easier to shrug off. Space was looser, overflow was easier to find, and a partner warehouse three handshakes removed from your contract could still get the job done. But things are different now. CBRE has industrial vacancy at 6.5%, JLL has asking rents at $10.45 per square foot, and 3PLs are fighting for the same buildings they’re promising to customers.

So the cheapest 3PL warehousing quote can fool you. The real cost shows up in how much space your provider controls, whose people touch your freight, how cleanly the systems talk, what happens at the gate, and how much leverage you have when something changes.

If you want to know what to look for in a 3PL warehousing partner, these six questions get past the map and into the operation.  

How Much Warehouse Space Does the 3PL Actually Control?

You want the square footage the 3PL actually owns or leases, broken out by address. Not “access to 12 million square feet.” Not “a nationwide network.” Space it controls.

That distinction tells you how much authority your provider really has once your inventory is inside the building. If the warehouse belongs to a partner, your 3PL may not control the labor, dock priorities, overflow rules, or what happens when a larger customer suddenly needs the same space.

In a tighter market, that gets expensive. The first half of 2026 saw 38 leases of 1 million square feet or more, versus 15 in all of 2025, while warehouse costs can range from roughly $4.50 per square foot in Memphis to $22 in Los Angeles.

For a manufacturer, the practical question is even simpler: Who runs the building when you need something at 6 a.m. Saturday?

Once you know that, ask what the facility is actually equipped and authorized to handle.

Can They Hold Your Freight Before Duty Is Paid?

Yes, if the 3PL operates a customs-bonded warehouse. If it doesn’t, duty is due when the freight enters U.S. commerce, and the flexibility ends there.

Bonded space lets imported goods sit under CBP supervision for up to five years before you pay duty. If you re-export them instead, you may avoid the duty entirely (19 U.S.C. § 1555 and 19 CFR Part 19).

That became a much bigger deal once tariff rates started whipping around. Yale’s Budget Lab measured an effective rate of 28% in April 2025, while Penn Wharton had it at 6.7% by July 2026. Bonded storage gives you the option to wait instead of writing the check immediately.

Ask what space is bonded today. “We can arrange it” is a different answer. Better yet, look for a 3PL that can handle the customs brokerage too, so your freight and customs paperwork aren’t bouncing between companies.

What Will Their Technology Connect To?

It should connect directly to the systems you already run: SAP, Oracle, NetSuite, your TMS, retailer EDI feeds, APIs, and whatever else keeps orders moving. Ask for names, methods, and a go-live date. “Our WMS integrates with anything” is the kind of sentence that sounds great until month six, when somebody is still uploading CSVs by hand.

The technology is worth pressing on because 3PLs are getting better at this. The 2026 Third-Party Logistics Study found 88% of shippers say their 3PL meets their needs, and 75% say the relationship lowers logistics costs. Make the integration part of the SLA anyway, with a date and consequences if it slips.

Then ask them to open the portal. Not screenshots. The real thing. In myMALLORY, for instance, customers can pull B/Ls, PODs, and lane reports without chasing someone by email.

How Do They Protect Freight That Isn’t Moving?

They should protect parked freight with strict driver verification, controlled access, and monitored surveillance at the gate. A camera that records the theft beautifully isn’t much consolation afterward.

Warehouses are prime targets. One analysis found 41% of cargo theft happens in warehouse storage and another 16% on unsecured lots. CargoNet put losses above $359 million in the first half of 2026, with the average stolen load worth about $341,518.

The thieves have gotten smarter too. Q2 incidents fell 26% year over year, yet estimated losses more than doubled to $304.6 million. Business email compromise can hand a fake driver the right PO number and enough credibility to walk straight onto the dock.

So ask to see the driver-verification SOP, CTPAT status, and whether video is actively monitored. CTPAT requirements are paperwork until somebody actually follows them at 2 in the morning. 

Can They Hit Your Retailer’s Compliance Numbers?

Don’t take their word for it. Ask to see the scorecards.

If Walmart is a major customer, small misses get expensive. Its OTIF target is about 98%, and noncompliant cases can trigger deductions of roughly 3% of cost of goods. For a supplier doing $30 million with Walmart, that can add up to $200,000 to $600,000 a year.

Ask the 3PL for OTIF, order accuracy, claims, and chargeback history for accounts similar to yours. Then ask how they prove their case when a retailer’s appointment or receiving data is wrong.

Those targets should also live in the contract. Best-in-class order accuracy is roughly 99.5% to 99.9%. If you ship food or consumer goods, add FSMA 204 readiness to the same scorecard.

Who Staffs the Building, and What Should the Contract Promise?

Start with the people who will actually touch your freight.

Ask whether the 3PL staffs the site with its own employees, what turnover looks like, and how it covers callouts and peak volume. Labor can account for 50% to 70% of DC operating costs, so a constantly changing crew can show up later as missed picks, damaged freight, and service failures.

Do the same with automation. Ask what is running in your building now, not what appears on a roadmap. Many 3PLs are implementing or evaluating automation, but future plans won’t help today’s orders.

Then make the contract match the operation. Spell out service levels, capacity commitments, and your right to leave if performance slips. Shippers increasingly want guaranteed capacity and flexible termination. Negotiate the exit while everyone still likes each other.

Where Mallory Alexander Fits

We’ll answer our own questions, since we’re the ones asking. 

Mallory Alexander International Logistics has 100 years behind it and runs 15 U.S. warehouse locations: five in Memphis, three in Laredo, and one each in Carson, Savannah, Charleston, Mobile, Nogales, and Kapolei, plus nine across Hong Kong and mainland China. 

That’s 1.4 million-plus square feet under contract in the U.S., 31 locations worldwide, and a facility list we’ll send before the pricing.

On duty, we’re a licensed customs broker with bonded and non-bonded warehousing in APAC, and our trade management team handles classification and duty strategy on the same freight our warehouses hold — i.e., the one-roof answer we told you to ask for. For retail, our buildings also run GS1/UCC-128 labeling, food-grade, temperature-controlled, and the operation is CTPAT certified.

The proof we’d point to on the contract question is a customer we helped scale from 800 retail locations to more than 9,000 on a single North American distribution network. If you’re running more than one provider and want one screen for all of it, that’s what managed logistics is for.

The questions above take about an hour. The wrong answers take three years to unwind. Start with us: send your lane list to a logistics expert, and we’ll send the facility list back, addresses first.