How to Choose a 3PL: A Step-by-Step Vetting Process for Ecommerce Brands

Step 1: Write a One-Page Brief

If every 3PL gets a slightly different description of your business, you'll get quotes that can't be compared. Write it down once. Include:

• Orders per month today, and your realistic forecast for the next 12 months, including your peak month
• Average items per order and the share of orders with more than one item
• Number of active SKUs, and roughly how many pallets or shelves of stock you hold
• Product details: size, weight, fragility, expiration dates, anything regulated
• Sales channels: your storefront platform, marketplaces, wholesale, subscription
• Packaging expectations: stock boxes or branded, inserts, gift notes, kits
• How inventory arrives: parcel, pallets, containers, from how many suppliers
• Where your customers are, by region if you know it

This takes an hour, and it saves you a dozen repetitive discovery calls. It also tells you something about each 3PL: the good ones will come back with sharp follow-up questions.

Step 2: Build a Shortlist With a Few Hard Filters

You don't need to talk to fifteen 3PLs. Filter first, then go deep with three to five.

Step 3: Compare Quotes on One Number

Send each shortlisted 3PL your brief and ask for a complete fee schedule, not a summary. Then convert every quote into a monthly total using your own volumes, add postage for your typical package to your typical destinations, and divide by orders. That cost per order is the comparison. If you want the formula and some worked examples, see How Much Does a 3PL Cost?, and for a sample quote with every line explained, see How to Read a 3PL Quote.

Pay special attention to shipping. Ask each provider whether postage is billed at their carrier cost or with a margin, and get it in writing. It's the line most likely to decide which quote is cheapest.

Step 4: Look at the Floor

Visit if you can. If you can't, ask for a live video walk-through, not a produced tour video. What you're looking for is evidence of process.

• Labeled locations everywhere. Every shelf and pallet position should have a scannable label. Stock sitting in aisles or on the floor without a location is a warning sign.
• Scanners in hands. Pickers and packers should be scanning barcodes, not reading paper lists and eyeballing products.
• A check at pack. Ask how a wrong item gets caught before the box closes. Good answers involve a scan, a weight check or both.
• The receiving area. A clear, organized receiving dock means inbound gets processed quickly. A dock stacked with pallets from last week means your restock will wait too.
• The afternoon. If you can, visit an hour before the carrier pickup. That's when you see how the operation handles pressure.

Ask to see the client portal or reporting with a real client's data hidden. You'll be using it every day, so make sure it shows inventory, orders and receiving in a way you can follow.

Step 5: Make Reference Calls Count

Every 3PL will give you happy references. You can still learn a lot from them if you ask specific questions instead of "Are you happy?"

1. "What went wrong in your first 90 days, and how was it handled?"

   Something always goes wrong during onboarding. You're listening for how fast it was noticed and who took ownership.

2. "How did they hold up last peak season?"

   Ask about shipping delays in November and December, and whether receiving slowed down in October.

3. "Has an invoice ever surprised you?"

   The answer tells you whether the fee schedule you're being shown is the whole story.

4. "When something breaks, who do you contact, and how quickly do you hear back?"

   You want a named person and a response in hours, not a ticket number and a response in days.

5. "Would you sign with them again?"

   Listen to the pause before the answer as much as the answer itself.

Ask for at least one reference whose products or volume look like yours. A glowing review from a brand shipping 50,000 orders a month doesn't tell you how you'll be treated at 1,500.

Step 6: Weigh Location Properly

Parcel carriers price by zone, which is roughly the distance between the warehouse and the customer. A warehouse on one coast shipping to the other pays higher-zone rates and waits longer for delivery on every cross-country order. Two ways to think about it:

• One warehouse, central location. A single central warehouse keeps the average distance to customers lower and reaches much of the country by ground in a few days. For most brands under several thousand orders a day, one well-placed warehouse beats splitting inventory.
• Several warehouses. Splitting stock across locations shortens delivery times, but it also multiplies inbound shipments, storage and the risk that the right product is in the wrong building. It usually pays off at high volume with a stable catalog.

Ask each 3PL for a ground transit-time map from their building, and overlay it on where your customers are.

Step 7: Score the Finalists

By now you'll have a gut feeling. Write it down anyway, because a scorecard keeps one impressive sales call from outweighing everything else. Adjust the weights to your business.

Contract terms get a low weight here only because they're usually negotiable. If a finalist won't move on a clause that matters to you, treat it as a filter rather than a score. Our contract guide covers what to push for.

Red Flags Worth Walking Away Over

• They can't or won't explain how shipping is billed.
• They won't let you see the warehouse, in person or on live video.
• No references with a business like yours.
• The integration with your store is "on the roadmap."
• They agree to every request during sales without asking a single question about how you operate.

That last one surprises people. A good 3PL will tell you when something you want is a bad idea or will cost more than it's worth. That's the behavior you want when it's peak season and there's a decision to make at 3pm.

Frequently Asked Questions