How to Choose a 3PL: 12 Questions Every CPG Brand Must Ask Before Signing a Contract

Switching 3PLs is one of the most operationally painful things a growing brand can go through. You’re moving inventory across warehouses, re-integrating every sales channel, and white-knuckling it through weeks of potential fulfillment disruptions, all while your customers keep ordering. That’s why knowing how to choose a 3PL correctly the first time matters so much.

The problem is that most founders evaluate fulfillment partners the way they’d evaluate a SaaS tool: they sit through a demo, glance at a rate card, and sign. The real risks, buried in billing structures, SLA fine print, and what happens when things go sideways, don’t surface until you’re three months in and locked into a contract.

This post is a due-diligence checklist built specifically for CPG operators and DTC brands. Twelve questions, grouped by category, designed to close the gap between a polished sales call and the reality of working with a fulfillment partner every day.

Why Most 3PL Evaluation Processes Fail CPG Brands

Enterprise 3PLs built for big-box retail replenishment operate on a fundamentally different model than what a scaling DTC or omnichannel CPG brand needs. Their systems are optimized for pallets-in, pallets-out, not for picking individual units across dozens of SKUs, handling subscription orders, or packing with branded inserts. When a mid-stage brand signs with the wrong type of provider, the mismatch shows up as slow receiving, rigid cutoff times, and a support team that treats your 500-order day as a rounding error.

The questions below are designed to surface these mismatches before they become your problem. Print this list, bring it to your next 3PL evaluation call, and don’t sign anything until you have clear answers to all twelve.

Questions About Pricing and Billing Transparency

1. What does your all-in cost per order actually look like?

A rate card is not a cost estimate. The only way to understand what you’ll actually pay is to model your specific order profile: your SKU count, average units per order, typical package dimensions, and monthly volume. Ask the 3PL to build a sample invoice based on your real numbers, not their marketing sheet.

While you’re at it, ask specifically about the fees that don’t make it onto rate cards: account minimums, peak season surcharges, long-term storage penalties, address correction charges, and special project labor. These “extra” fees can add 15–25% to your monthly bill if you’re not aware of them upfront.

2. How do you handle billing disputes or invoice errors?

If you can’t reconcile an invoice against a WMS-generated report, you have a transparency problem. Ask how billing disputes are resolved, how credits are issued, and what the typical turnaround time is. At an early-stage brand, you don’t have an ops team to chase down billing discrepancies every month, the process needs to be clean and auditable from day one.

3. Are there volume minimums or contract lock-ins?

Some 3PLs require 90–180 day notice periods or charge breakup fees that can run into the thousands. Understand these terms before you sign. Ask what happens if you miss monthly minimums, a common scenario for seasonal CPG brands, and whether there’s a penalty. The strongest move is to negotiate a 60-day pilot or ramp period before committing to full contract terms, so you can evaluate the relationship with real orders before you’re locked in.

Questions About Operations and SLAs

4. What is your guaranteed order cutoff time and same-day fulfillment rate?

Cutoff times vary significantly across providers, the difference between a 12 PM and a 5 PM cutoff directly affects how quickly your customers receive their orders. Don’t accept a target; ask for actual data. What percentage of orders placed before cutoff shipped same-day last month? And critically, how do cutoff times and SLAs change during peak season and promotional windows?

5. What is your order accuracy rate, and how do you measure it?

The industry standard is 99.5% or higher. But the number alone isn’t enough, you need to understand the process behind it. Ask how errors are caught: scan-verified picking, weight checks, photo-on-pack verification? And find out who pays for reshipping a mispicked order. If the answer is “the brand,” that accuracy rate number matters a lot more.

6. How do you handle receiving, and what’s your standard inbound processing time?
This is one of the most underrated risks in 3PL relationships. Slow receiving, 5 to 10 business days from truck arrival to units available in the WMS, creates inventory blind spots and stockouts that directly cost you sales. Ask for average receiving cycle time and clarify who is responsible for freight claims on inbound damage. A fast, well-documented receiving process is a sign of operational maturity.

7. What does your returns processing workflow look like?
Returns are operationally expensive and frequently handled poorly. Ask for a step-by-step breakdown: is returned inventory inspected and restocked, quarantined for review, or disposed of by default? What’s the turnaround time from return receipt to inventory credit in the system? For DTC brands, that turnaround time directly affects cash flow and inventory availability.

Questions About Technology and Integrations

8. What WMS do you use, and what can I see in real time?

You need real-time inventory visibility, order status tracking, and receiving confirmations, not end-of-day email summaries. Ask for a live demo of the brand-facing portal, not a screenshot deck. If the WMS requires custom development for basic integrations with Shopify, WooCommerce, or Amazon, that’s a sign the platform hasn’t kept pace with how modern DTC brands actually operate.

9. How do you integrate with my sales channels, and who manages the integration?

Get specific. Ask about Shopify, Amazon (both FBA prep and FBM), TikTok Shop, EDI for retail accounts, and any subscription platform you use like ReCharge or Skio. Clarify whether integrations are native, run through middleware like ShipStation or Extensiv, or require custom API work. Most importantly, find out who owns troubleshooting when an integration breaks, the 3PL, your team, or a third-party vendor.

10. Can I see historical reporting on inventory accuracy and SLA compliance?

Data-mature 3PLs should have clean, accessible reporting on fill rates, cycle count accuracy, and on-time ship rates, ideally broken down by SKU or channel. If you’re running promotions or managing Amazon replenishment, you need forecasting-ready data, not static snapshots. Ask whether reports are self-serve through a portal or require a support ticket every time.

Questions About Scalability and Fit

11. What is your peak season capacity, and do you bring in temp labor?

Every 3PL deals with Q4 volume spikes, but how they handle staffing tells you a lot about their operation. Ask what percentage of their total volume concentrates in Q4 and how they staff for it. Temp labor during peak is standard, the real question is how temps are trained, supervised, and held to the same accuracy standards as full-time staff. Also ask whether your account gets a dedicated team or is pooled into general labor, because SKU complexity matters when new hands are touching your product.

12. Have you worked with brands at my stage and in my product category?
A 3PL that’s excellent for a 10,000-order-per-month apparel brand may be a terrible fit for a 500-order-per-month supplement company that needs lot tracking and climate-controlled storage. Ask for references from brands that match your stage, volume, and product type. If they can’t provide them, they either don’t have the experience or don’t have happy clients, both are disqualifying.