What to Look for When Choosing a Carrier

Choosing the right shipping carrier is one of the most important strategic decisions in fulfillment. A carrier affects not only your shipping costs, but also customer satisfaction, return rates, scalability, and the efficiency of your entire logistics operation. Those who blindly choose the cheapest rate or rely exclusively on a single provider risk hidden costs, delivery problems, and growth bottlenecks.

This guide systematically shows which criteria really matter when selecting a carrier – from pricing structure to technical integration and international reach.

Why Carrier Selection Is More Than a Price Comparison

Many online retailers compare carriers primarily based on the postage price per package. That falls short. The effective shipping price consists of rates, surcharges, return costs, failed delivery rates, and internal effort. A low base price can become expensive if the carrier frequently triggers redeliveries, does not offer a reliable API, or only allows manual creation of return labels.

At the same time, the carrier directly shapes the customer experience: delivery time, tracking quality, parcel lockers, delivery windows, and handling of failed delivery attempts determine whether customers return or leave negative reviews.

Key Selection Criteria at a Glance

Before signing contracts or building a multi-carrier strategy, you should evaluate each provider using the same criteria matrix. This helps you avoid subjective impressions and compare offers objectively.

Carrier Evaluation Matrix: DHL, GLS and DPD as an Example

The following matrix shows how you can evaluate providers side by side using the same criteria. The assessment is intended as guidance and must be adapted to your specific shipment profile.

Calculating Costs Correctly

Shipping costs are rarely transparent. In addition to the base postage, surcharges for overweight, oversize, island delivery, fuel surcharges, or peak seasons often apply. Business customer contracts can offer attractive discounts – but often only from defined minimum volumes or with binding periods.

What Belongs in a Complete Cost Analysis

1. Base rate per shipment by weight and size classes
2. Surcharges for special services (cash on delivery, registered mail, Saturday delivery)
3. Return costs including unused return labels
4. Failed delivery and claims costs (time spent in customer service)
5. Internal process costs (manual vs. automated label creation)
6. Packaging adjustments due to carrier requirements (e.g. small parcel formats)

A package that formally costs 4.29 euros can actually amount to 6.80 euros or more after all surcharges and returns. That is why a detailed calculation based on your actual shipment structure pays off – not based on an average value.

Delivery Times and Service Levels

Customers today expect fast and reliable deliveries. The carrier must match your shop promises: those offering next-day delivery need a carrier with late cut-off times and reliable delivery performance. Those communicating standard shipping in two to three days can choose more cost-effective products.

Cut-off Times and Shipping Windows

The cut-off time determines until when an order can still leave the warehouse on the same day. Late cut-offs (e.g. 6:00 PM) increase conversion in the shop because more orders are still "shipped today." Check with each carrier:

• Pickup times at the warehouse location
• Weekend and holiday logic
• Peak season capacities (Black Friday, Christmas)
• Regional differences in delivery rates

Process Flow: Order to Delivery

Orders within the cut-off go through the process without delay. Late orders are only handed over to the carrier on the next business day – a common reason for discrepancies between shop promises and actual delivery time.

Technical Integration and Automation

From a daily shipping volume of 20 to 50 packages, manual franking becomes a bottleneck. Technical integration of the carrier into WMS, shipping software, or shop systems is then crucial.

API, Plugins and Multi-Carrier Software

A good carrier offers:

• Stable REST or SOAP APIs for label creation and tracking
• Shop plugins for common systems (Shopify, WooCommerce, Shopware)
• Webhooks for real-time status changes
• Sandbox environments for testing before going live

Those using multiple carriers should deploy central shipping software that compares rates and automatically selects the cheapest or fastest carrier per shipment. For details on technical integration, see the article on carrier integration in shipping software.

Reach: Domestic, EU and International Markets

Not every carrier covers all target markets equally well. For the German domestic market, DHL, DPD, GLS, Hermes, and UPS are available – with different strengths in rural regions, parcel lockers, and branch networks.

Domestic vs. International

Plan your carrier structure with your growth path in mind: a shop that only serves Germany today may need EU-wide logistics tomorrow. Carriers with scalable international infrastructure save later migration costs.

Returns and Reverse Logistics

Returns are unavoidable in e-commerce – especially in fashion and electronics. The carrier should integrate returns seamlessly into the shipping process:

• Return labels in the shipment or digitally via email
• Returns portal for customers with tracking of the return shipment
• Transparent costs for retailers and end customers
• Fast booking in the WMS after return goods receipt

A carrier that only offers returns as a separate, expensive add-on product increases your total costs and worsens the customer experience.

Multi-Carrier vs. Single Carrier

The decision between a single carrier and a multi-carrier strategy depends on volume, assortment, and IT maturity.

When One Carrier Is Sufficient

• Low to medium shipping volume (under 500 shipments/month)
• Homogeneous assortment without special requirements
• Focus on one core market (e.g. Germany only)
• Simple IT landscape without WMS

When Multi-Carrier Makes Sense

• High shipping volume with negotiating power with multiple providers
• Different product categories (small parcel, bulky goods, express)
• Regional optimization (carrier A in the south, carrier B in the north)
• Redundancy during peak seasons and carrier outages

Multi-Carrier Decision Workflow

Checklist: Carrier Evaluation Before Signing a Contract

Use this checklist before signing a carrier contract or reviewing your existing carrier structure:

• Total cost per shipment calculated including all surcharges
• Return costs and return rate taken into account
• Cut-off times aligned with shop promises
• API or plugin successfully tested in test environment
• Tracking events available for customer notifications
• Delivery rate researched in your core regions
• Peak season capacities confirmed in writing
• Contact person and escalation path defined
• Contract term and notice periods reviewed
• Special requirements (hazardous goods, bulky goods) clarified
• Data protection and data processing agreement (DPA) in place
• Alternative carrier identified as backup

Practical Example: Mid-Sized Fashion Shop

An online shop with 800 orders per month, an 18 percent return rate, and shipping to Germany, Austria, and Switzerland faced a carrier decision. Initially, only DHL was used – simple, but expensive for small parcels and international shipments.

After a shipment analysis, the following optimization emerged:

1. Small parcels up to 1 kg domestic: Cheaper carrier with comparable transit time
2. Standard parcels domestic: DHL due to parcel lockers and high customer demand
3. Austria and Switzerland: Specialized EU carrier with better customs processes
4. Returns: Unified returns portal via shipping software

Result: 14 percent lower shipping costs with unchanged customer satisfaction – with moderate additional effort for multi-carrier setup.

Typical Mistakes When Choosing a Carrier

We encounter these mistakes again and again in practice:

1. Comparing only unit price – ignoring surcharges and returns
2. No test phase – starting integration directly in live operation
3. Shop promises without carrier alignment – "delivery tomorrow" without express product
4. No backup carrier – shipping comes to a standstill during disruptions
5. Underestimating contractual binding – overlooking minimum volumes and terms
6. Neglecting international – expensive migration needed later

Carrier Decision Process: Timeline

Conclusion: Decide Systematically, Not Spontaneously

Carrier selection is not a one-time decision, but an ongoing optimization process. Markets, volumes, and customer expectations change – your carrier structure should be able to grow with them. Those who consider costs, technology, reach, and returns together and regularly adjust based on real shipping data secure long-term competitive advantages in fulfillment.

Start with an honest analysis of your shipment structure, define clear criteria, and test providers before committing. A well-thought-out carrier strategy pays off faster than many retailers expect.

Related Topics

• Hermes GLS DPD UPS Compared
• Multi-Carrier Strategy
• Calculating Shipping Costs
• Carrier Integration in Shipping Software
• Rate Negotiation with Carriers

Last updated: July 6, 2026