Understanding Third Party Logistics Services: How They Work and Why They Matter

Estimated Reading Time: 10 minutes  

What to Expect

This post is for brand owners, operations managers, and growing e-commerce businesses evaluating whether third party logistics services are the right move. It covers how 3PL services work from inbound receiving to last-mile delivery, what to look for in a logistics provider, how the cost structure compares to self-fulfillment, and when outsourcing fulfillment makes the most sense for a growing operation. By the end, you will have a clear picture of what a 3PL relationship actually looks like day to day and what questions to ask before signing with a provider.

Table of Contents

1. What Are Third Party Logistics Services

2. How 3PL Services Work From Dock to Door

3. The Different Types of 3PL Providers

4. What Third Party Logistics Services Actually Cost

5. In-House Fulfillment vs Third Party Logistics

6. What to Look for in a 3PL Provider

7. Why Geography Matters When Choosing a 3PL

8. When It Makes Sense to Outsource to a 3PL

9. How Shipping Bros 3PL Approaches Third Party Logistics

Fulfillment is one of those operational areas that works quietly in the background until it does not. A missed shipment, a wrong item in the box, or a package that takes six days to cross two states becomes visible fast, first to the customer, then in the reviews, then in the return rate. Third party logistics services exist to make that operational layer reliable, fast, and cost-efficient so brands can focus on the product and the customer relationship rather than the warehouse and the carrier contracts.

This guide breaks down exactly how third party logistics services work, what they cost, and what the right 3PL provider looks like for a brand that is serious about shipping well.

What Are Third Party Logistics Services

Third party logistics services, commonly referred to as 3PL services, are outsourced supply chain functions managed by a dedicated logistics provider on behalf of a brand or merchant. The 3PL provider handles the physical work of warehousing inventory, picking and packing orders, managing carrier relationships, and shipping packages to end customers.

The brand retains control of its product, its pricing, and its customer relationships. The 3PL handles the operational infrastructure that makes fulfillment possible. Most 3PL providers also offer returns processing, kitting and assembly, freight management, and inventory reporting as part of their service offering.

The core reason brands use third party logistics services is access. A qualified 3PL provider brings warehouse space, trained labor, warehouse management technology, and carrier rate leverage that would take a brand years and significant capital to build independently. For brands that are scaling, that access comes at a fraction of the cost of replicating it in-house.

How 3PL Services Work From Dock to Door

Understanding the flow of third party logistics services from start to finish makes it easier to evaluate whether a provider's process matches what your brand actually needs.

Inbound Receiving

The process starts when your inventory arrives at the 3PL fulfillment center. A well-run provider asks for advance shipping notices before freight arrives so dock staff know what to expect, when, and in what quantity. Upon arrival, inbound inventory is checked in against the purchase order, scanned into the warehouse management system, and slotted into a bin location. In a high-performing 3PL operation, inventory is available for order picking within hours of the truck unloading.

Slow or manual receiving is one of the most common failure points in third party logistics. When inventory sits in a receiving queue for two or three days, it cannot fill orders. That delay forces brands to carry more safety stock than they need just to cover the receiving lag, which ties up capital unnecessarily.

Storage and Inventory Management

Once inventory is received and slotted, the 3PL maintains it in a climate-appropriate environment and tracks it in real time through the warehouse management system. Brands should expect visibility into on-hand quantities, reserved quantities against open orders, and incoming replenishment by SKU.

Cycle counting, the practice of physically counting a portion of inventory on a rolling schedule, keeps the system record aligned with physical reality. Inventory record inaccuracy is the root cause of most pick errors and phantom stockouts. A 3PL provider that does not have an active cycle count program should not be trusted to maintain accurate inventory at scale.

Order Picking and Packing

When a customer places an order on a connected storefront, the order flows automatically into the 3PL's warehouse management system through an API integration. A pick list is generated, and a warehouse associate follows a directed pick path to the correct bin locations. Every item is scanned against the order at the point of pick to confirm accuracy before it goes into the carton.

At the pack station, the correct box size is selected, protective materials are added if needed, and the packed carton is weighed against the expected order weight as a second accuracy check. If the weight does not match, the pack station flags the order for review before a label is printed. This two-step accuracy model, scan at pick and weigh at pack, is what drives order accuracy rates at or above 99.5 percent in high-performing third party logistics operations.

Carrier Selection and Shipping

With the order packed and confirmed, the 3PL's system rate-shops across carriers in real time. UPS, FedEx, USPS, and regional carriers are compared on price and transit time for the specific destination and package profile. The system selects the optimal option, prints the label, and the package moves to the carrier staging area for pickup.

The tracking number is automatically sent back to the storefront, which triggers the brand's shipping confirmation email to the customer. The customer sees tracking information without any manual action from the brand or the 3PL.

Returns Processing

Returns arrive at the fulfillment center, are inspected and graded, and either restocked as sellable inventory or set aside for disposition based on the brand's policy. A fast returns process keeps inventory data accurate and reduces the time between a return arriving and that unit being available to fill a new order.

The Different Types of 3PL Providers

Third party logistics providers are not all the same, and understanding the different categories helps narrow the selection process.

Asset-based 3PLs own their own warehouse space, equipment, and in some cases, transportation assets. They control the physical infrastructure that runs the operation. Shipping Bros 3PL is an asset-based provider, which means clients are not subject to subcontracted warehouse quality or capacity constraints from a third party.

Non-asset-based 3PLs act as intermediaries, contracting warehouse and carrier capacity from other providers and managing logistics on behalf of their clients without owning the underlying infrastructure. These providers can offer geographic flexibility but typically have less direct control over operational quality.

Fulfillment-only 3PLs focus exclusively on e-commerce order fulfillment and do not handle freight, customs, or complex supply chain functions. These are often the right fit for direct-to-consumer brands with straightforward inbound and outbound requirements.

Full-service supply chain 3PLs handle everything from international freight and customs brokerage through domestic distribution and last-mile delivery. These providers are built for brands with complex, multi-leg supply chains and high transaction volume.

Matching the type of 3PL provider to the complexity and volume of the brand's logistics needs is one of the most important steps in the selection process.

What Third Party Logistics Services Actually Cost

3PL pricing structures vary by provider, but most include a combination of the following fee categories.

Receiving fees are charged per pallet, per carton, or per unit when inbound inventory arrives at the fulfillment center. These fees cover the labor and system costs of checking in, scanning, and slotting merchandise.

Storage fees are charged per pallet or per cubic foot per month. Storage costs vary based on the size and density of the inventory, and some providers charge differently for ambient, refrigerated, or hazardous storage.

Pick and pack fees cover the labor cost of pulling items from bin locations and packing them into cartons for shipment. Most providers charge a base per-order fee plus a per-item fee for orders with multiple units.

Outbound shipping costs are passed through from the carrier with the 3PL's negotiated rate applied. Many 3PL providers ship enough volume to access carrier rates that individual brands cannot negotiate independently. That rate access often offsets a meaningful portion of the per-order fulfillment fee.

Returns processing fees cover receiving, inspection, and restocking of returned merchandise.

The most accurate way to compare 3PL providers is to calculate a total landed cost per order that includes all applicable fees for a representative order profile. Comparing only the per-order pick fee without accounting for storage, receiving, and materials leads to surprises after the contract is signed.

In-House Fulfillment vs Third Party Logistics

The decision to keep fulfillment in-house or outsource to a 3PL is fundamentally a question of where operational attention and capital are best deployed.

In-house fulfillment gives brands direct control over the process and the physical space. For very early-stage operations with low order volume and a need to stay close to the product, this can make sense. The trade-offs accumulate as volume grows. Warehouse leases become more expensive and harder to right-size. Labor becomes harder to manage across demand swings. Carrier rates stay high because individual volume does not generate negotiating leverage. Technology investments are required to build the WMS, carrier integrations, and reporting infrastructure that 3PL providers already have in place.

Third party logistics services shift those fixed costs into variable costs. Rather than paying rent on a warehouse whether it is full or empty, brands pay for the space and labor they actually use. Rather than negotiating carrier contracts individually, brands access the aggregate rate leverage of a 3PL provider's total shipping volume. Rather than building and maintaining a WMS, brands use the 3PL's existing technology through an integration that takes days rather than months to set up.

The break-even point varies by brand, but most growing e-commerce operations find that outsourcing fulfillment to a qualified 3PL becomes cost-competitive with self-fulfillment well before the operational complexity of in-house fulfillment becomes unmanageable.

What to Look for in a 3PL Provider

Selecting a third party logistics partner is a decision that directly affects customer experience and operational unit economics. These are the criteria worth evaluating carefully before committing.

Order accuracy rate. A best-in-class 3PL should be able to document order accuracy at 99.5 percent or higher. Ask for actual performance data, not estimates. Providers that cannot or will not share accuracy metrics are telling you something about the reliability of their operation.

Receiving speed. Ask how quickly inbound inventory becomes available for order picking after it arrives at the dock. Same-day or next-business-day availability is the standard to target. Providers with multi-day receiving queues will force you to carry more safety stock and accept more stockout risk than necessary.

Cut-off times. Same-day order fulfillment requires a late daily cut-off for order submission. A provider that stops picking at noon limits your ability to compete on delivery promises regardless of how good your carrier relationships are.

Technology integrations. Direct API connections to Shopify, WooCommerce, Amazon, Walmart, and other channels should be standard. Manual order imports or CSV uploads are a red flag in any modern third party logistics operation.

Scalability. Evaluate whether the provider can handle your peak volume, not just your average daily order count. A 3PL that is capacity-constrained during Q4 is not a logistics partner. It is a seasonal liability.

Transparency. The best 3PL relationships run on shared data and open performance conversations. If a provider deflects questions about accuracy, cut-off times, or technology, that deflection usually reflects something about their confidence in the operation.

Why Geography Matters When Choosing a 3PL

Where a fulfillment center is located determines how far your packages have to travel, how long they take to arrive, and how much you pay to ship them. These are not small variables. Shipping cost and delivery speed are two of the most important factors in customer satisfaction for physical goods brands, and both are directly determined by geography.

A fulfillment center in Springdale, AR sits in a position that gives brands strong ground transit coverage across the south-central United States. Dallas, Kansas City, Memphis, St. Louis, Oklahoma City, Nashville, Tulsa, and Little Rock are all within a one to two day ground shipping radius. For brands whose customer base is concentrated in this region, shipping from Springdale means ground service delivers at the speed customers associate with expedited shipping, at a fraction of the cost.

Brands currently shipping from a single coastal warehouse often pay for overnight or two-day air service to reach south-central customers within two days. Moving that inventory to a centrally located fulfillment center like Shipping Bros 3PL in Springdale lets those same brands make the same delivery promise using ground transit. The freight savings are typically substantial, often in the 15 to 30 percent range on affected shipments.

When It Makes Sense to Outsource to a 3PL

Third party logistics services are not the right fit for every business at every stage. The following signals consistently indicate that the time to evaluate 3PL services has arrived.

Order volume is growing faster than the in-house team can manage without adding headcount, overtime, or floor space. The fulfillment operation is becoming the most demanding management problem in the business. Shipping errors are climbing above one percent of orders. Peak seasons require temporary staff who slow the operation down while they learn it. The average time from order placement to shipment is creeping past one business day. Freight costs are consuming more than 15 percent of revenue without a clear path to improvement. The business is entering a new sales channel, such as wholesale or retail distribution, that carries compliance requirements the current operation is not set up to handle.

Any one of these conditions is a reasonable prompt to run the numbers on outsourcing. More than one appearing simultaneously makes the case for a 3PL evaluation urgent.

How Shipping Bros 3PL Approaches Third Party Logistics

Shipping Bros 3PL in Springdale, AR is built around the belief that fast and lean are not in conflict. Every workflow in the operation exists to move orders out accurately and efficiently, without unnecessary steps, waiting, or manual work.

Inbound inventory is received and available for picking same day in most cases. Orders received before the daily cut-off ship same day. Every pick is scanned against the order and every packed carton is weighed before a label is generated. Outbound shipments are rate-shopped automatically across UPS, FedEx, USPS, and regional carriers. Clients have real-time visibility into inventory levels, open orders, and shipment tracking through a live dashboard. Returns are processed, graded, and restocked quickly so inventory stays accurate and usable.

Every client works with a dedicated account team based in Springdale that knows their catalog, their seasonal patterns, and their service requirements. When an exception needs a fast decision, the answer comes from someone who knows the account, not a support queue.

If your brand is ready to evaluate third party logistics services and you want to understand what outsourcing fulfillment through Shipping Bros 3PL would look like operationally and financially, we are straightforward to talk to. Bring your order volume, your SKU count, and your current shipping cost structure. We will show you exactly where we fit and what the numbers look like.