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How to Choose a 3PL Provider: Key Factors and Questions to Ask

Selecting the right third-party logistics provider is critical. This guide covers evaluation criteria, red flags, and contract tips.

· 3 min read

When to consider a 3PL

A third-party logistics provider makes sense when one of these is true:

  • You are shipping more than a few hundred orders per month and fulfillment is eating your team's time.
  • You need to be physically closer to customers (multi-node distribution) without signing a warehouse lease.
  • Peak season swings make hiring permanent warehouse staff impractical.
  • You are expanding into a new region or sales channel (Amazon FBM, retail B2B, international).

If you are shipping fewer than ~100 orders a month, doing it in-house is usually cheaper and gives you faster learning.

Five capabilities to evaluate

1. Order profile fit

Match the 3PL to your order profile, not their marketing. A 3PL optimized for pallet-out B2B will struggle with single-unit DTC, and vice versa. Ask for a reference customer with a similar SKU count, order size, and channel mix.

2. Technology and integrations

  • Native integrations with your cart, OMS, and marketplaces (Shopify, NetSuite, Amazon, EDI).
  • Real-time inventory visibility, ideally via API, not a nightly CSV.
  • Order status, tracking, and exception reporting in a customer portal.

If they cannot show you a live dashboard during the sales call, that is a red flag.

3. Network and carrier mix

  • Number and location of warehouses relative to your demand.
  • Parcel carrier mix: negotiated rates with UPS, FedEx, USPS, and regional carriers.
  • LTL and FTL options for B2B fulfillment.
  • International capability if relevant: customs brokerage, IOR/EOR, DDP shipping.

4. Pricing transparency

Watch for these often-hidden fees:

  • Receiving (per pallet, per case, per unit)
  • Storage (per pallet, per bin, per cubic foot)
  • Pick and pack (per order, per additional unit)
  • Kitting, labeling, returns processing
  • Account management or technology fees
  • Minimum monthly fees

Ask for a sample invoice based on a representative month of your real volume. Total cost per order is what matters, not the headline pick rate.

5. SLAs and performance

Get written commitments on:

  • Receiving turnaround (target: 24 to 48 hours)
  • Order accuracy (target: 99.5%+)
  • On-time shipping (target: 99%+ same day for cutoff orders)
  • Inventory accuracy (target: 99%+)
  • Response time on support tickets

And ask how they are measured and reported. Vague SLAs you cannot verify are not SLAs.

Twelve questions to ask every 3PL

  1. What is your average order accuracy across customers similar to us?
  2. What is your inventory shrinkage rate?
  3. How do you handle peak season capacity?
  4. What is your employee turnover, and how do you train new pickers?
  5. Who is my day-to-day contact, and what is their span of control?
  6. How do you handle damages, lost inventory, and chargebacks?
  7. What is the offboarding process if it does not work out?
  8. Can you provide three references in our vertical?
  9. How do you support returns and reverse logistics?
  10. What does your business continuity plan look like (fire, flood, labor)?
  11. Are you SOC 2, ISO 9001, or C-TPAT certified?
  12. Show me a customer using your system live, not a sandbox demo.

Red flags

  • Long-term contracts with onerous termination clauses.
  • Refusal to share customer references.
  • Pricing that depends on a discretionary account manager review.
  • No clear escalation path beyond a generic support inbox.
  • Hand-waving on shrinkage and inventory accuracy.

After you sign

The first 60 days will determine whether the partnership succeeds. Set a weekly business review, publish a shared scorecard with the SLAs above, and resist the urge to renegotiate scope until the baseline is healthy.

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