Steps to Switch to a Managed Multi-Carrier Approach (Without the Downtime)
Switching delivery providers is one of those decisions that gets delayed for months. The pain of poor service, rising costs or limited carrier options builds gradually, but the perceived risk of migration keeps operations teams locked into setups that are no longer delivering value.
The reality is that a well-planned move to a managed multi-carrier delivery model is far less disruptive than most retailers expect. The bigger risk is staying with a setup that is costing you money, damaging your customer experience and limiting your ability to grow. With delivery now a primary driver of customer loyalty and repeat purchase, settling for “good enough” is a competitive liability.
This guide walks through the full process of switching to a managed multi-carrier approach: from auditing your current setup to going live without downtime.
If you are already considering a change, GFS’ Managed Multi-Carrier Services provide access to 1,000+ delivery services through a single integration and partnership.
Why Retailers Are Switching in 2026
The delivery ecosystem has shifted significantly over the past two years. Carrier surcharges have increased, fuel levies have become less predictable and service levels from legacy providers have not always kept pace with growing customer expectations. At the same time, consumer tolerance for poor delivery experiences is at an all-time low.
According to Sendcloud’s 2025 E-commerce Delivery Compass, 57% of UK shoppers encountered a delivery issue (Sendcloud 2025). Meanwhile, more than two-thirds of UK consumers reported recent parcel issues, with customer satisfaction remaining low (Financial Times).
The gap between what shoppers expect and what many delivery setups can offer is driving operations teams to re-evaluate their entire carrier strategy.
The most common triggers for switching include:
Escalating costs without improved service: If your cost per parcel is rising but transit times, delivery success rates and tracking quality remain the same, you are paying more for less. This is the single most common reason retailers begin looking elsewhere.
Single-carrier dependency: Relying on one carrier for all volume creates operational fragility. When that carrier has capacity issues, surcharge increases or service disruptions, your entire delivery operation is affected with no fallback.
Limited international reach: A domestic-only carrier setup becomes a bottleneck the moment you try to sell internationally. Retailers expanding into new markets need access to regional carriers that outperform global generalists on specific routes.
Poor technology and visibility: Legacy shipping setups often lack real-time tracking, intelligent carrier selection at checkout and consolidated performance reporting. Without these capabilities, operations teams are making decisions based on incomplete data.
Contractual lock-in and inflexibility: Long-term carrier contracts with minimum volume commitments and rigid pricing structures leave no room to adapt to seasonal demand shifts or changes in your product mix.
What to Audit Before You Move
Before contacting prospective providers, you need a clear picture of where your current setup is failing and what a replacement needs to deliver. A thorough audit prevents you from making a like-for-like switch that inherits the same problems.
Cost per parcel by service level: Break down your total shipping spend by carrier, service type and destination. Include base rates, fuel surcharges, remote area fees, residential surcharges and any penalty charges. Most retailers discover that the true cost per parcel is significantly higher than the rate card suggests.
Delivery performance data: Pull your carrier’s actual on-time delivery rate, not their published SLA. Compare it against customer complaint data and WISMO (Where Is My Order) contact volumes. If you are tracking this through performance management tools, the data will be available at the carrier level. If not, that gap is itself a reason to switch.
Carrier coverage gaps: Map your delivery destinations against your current carrier’s coverage. Where are you paying premium surcharges for areas that a regional specialist would cover at standard rates? Where are you unable to offer competitive international delivery because your carrier’s network does not extend to your target markets?
Technology capabilities: Document what your current setup can and cannot do: automated carrier selection, real-time tracking, checkout delivery options, returns processing, performance reporting. The gaps in this list become your requirements specification for the new provider
Contract terms and exit clauses: Review your current agreements for notice periods, minimum volume commitments and early termination fees. Knowing these timelines is essential for planning a migration that avoids overlap costs or service gaps.
The Seven-Step Switching Framework
A structured approach to carrier migration eliminates the risks that make operations teams hesitate. Follow these seven steps.
Step 1: Define Your Requirements
Start with the audit findings. Document the carrier mix you need (domestic, international, specialist), the service levels you want to offer at checkout, your integration requirements (platform, OMS, WMS), your volume profile by destination and your budget parameters. This becomes the brief you take to prospective providers.
Contact GFS if you’d like support through a Delivery Audit Expert
Step 2: Evaluate Multi-Carrier Partners
Rather than replacing one carrier with another, consider moving to a managed multi-carrier model. This gives you access to multiple carriers through a single integration, with intelligent routing that selects the best carrier for each shipment based on destination, service level, contingency, cost and performance data. Evaluate providers on carrier breadth, technology capability, onboarding support and commercial flexibility.
Step 3: Run a Parallel Trial
The safest way to migrate is to run the new partner alongside your existing setup for a defined period. Route a subset of your volume — a specific carrier, a product category or a geographic region — through the new platform while keeping everything else on your current setup. This validates performance in a live environment with zero risk to your full operation.
Step 4: Integrate Your Technology Stack
Connect the new partner’s carrier management technology to your eCommerce platform, order management system and warehouse workflows. GFS offers key integrations such as checkout for delivery options at the point of purchase, labelling and despatch for automated label generation and tracking and visibility for consolidated shipment tracking across all carriers.
Step 5: Migrate Volume Progressively
Once the parallel trial proves stable, begin shifting volume in phases. Start with the services where your current provider is weakest; this delivers the most immediate improvement and builds internal confidence. Move domestic standard, then domestic premium, then international. At no point should your entire operation depend on an untested connection.
Step 6: Decommission the Old Setup
When all volume has migrated and performance is validated, give formal notice on your existing carrier contracts. Ensure all tracking data, returns in transit and outstanding claims are resolved before the old provider’s systems are disconnected. Keep access to historical data for at least 12 months for reference and dispute resolution.
Step 7: Optimise Post-Migration
The first 90 days after full migration are critical. Monitor delivery success rates, cost per parcel, WISMO volumes and checkout conversion by carrier. Use performance management reporting to identify which carriers are outperforming and where routing rules need adjustment. A multi-carrier setup is not static; it should be continuously refined based on data.
Why Multi-Carrier Management Beats Like-for-Like Replacement
The most common mistake retailers make when switching is replacing one single-carrier relationship with another. You inherit a new set of strengths and weaknesses, but the fundamental problem — dependency on one provider — remains.
A managed multi-carrier model eliminates this problem entirely. Instead of routing all parcels through one carrier, you route each shipment to the carrier that is best for that specific delivery: expensive for premium, cheapest for economy, most reliable for a given postcode or country. The result is better performance across every metric without being held hostage by any single provider’s limitations.
The operational advantage compounds over time. With access to a network of carrier partners, you can adapt to seasonal demand, respond to carrier disruptions by re-routing volume and negotiate from a position of leverage because no single carrier controls your entire operation.
GFS provides access to over 1,000 delivery services across 220+ destinations through a single commercial relationship and a single invoice. Retailers get the breadth of a global multi-carrier network without managing dozens of individual carrier contracts.
Red Flags and Risks to Watch For
Not every switch goes smoothly. Watch for these warning signs during the evaluation and migration process.
Providers who cannot run a parallel trial: If a prospective partner insists on a full cutover with no trial period, that is a red flag. A confident provider will let you validate their service with live volume before committing.
Vague onboarding timelines: Ask for a specific, phased onboarding plan with milestones and accountable owners. “Four to six weeks” without detail is not a plan. A structured multi-carrier onboarding should include integration testing, carrier activation, UAT and a defined go-live date.
Hidden costs in the rate card: Scrutinise the commercial proposal for fuel surcharges, peak surcharges, remote area fees, failed delivery charges and minimum volume commitments. Compare the total cost of ownership, not the headline rate.
No performance reporting: If the provider cannot show you real-time carrier performance data — on-time delivery rate, cost per parcel by service, exception rates by carrier — you will be flying blind after migration. Performance visibility is non-negotiable.
Rushing the timeline: A carrier migration done properly takes 6–12 weeks depending on complexity. Trying to compress this into a fortnight to meet a deadline creates exactly the kind of disruption you are trying to avoid.
What a Smooth Transition Looks Like
A well-executed switch should be invisible to your customers. Parcels continue to arrive on time. Tracking links work. Checkout delivery options display correctly. The only difference the customer notices is better service.
Behind the scenes, the operations team should see an immediate improvement in three areas: visibility (consolidated tracking and reporting across all carriers), flexibility (the ability to route shipments based on rules and contingency rather than being locked into one carrier) and control (data-driven decisions about which carriers to use for which shipments).
GFS clients typically start with a delivery audit that maps the retailer’s current carrier mix, cost structure and performance data against what a managed multi-carrier approach can deliver. This audit identifies the quick wins — routes where a carrier switch delivers immediate savings or performance improvement — as well as the longer-term optimisation opportunities.
If you are considering a change, the first step is understanding where your current setup is underperforming. GFS offers a no-obligation delivery audit that benchmarks your carrier mix, cost per parcel and delivery performance against industry standards. No commitment, no hard sell — just data to inform your decision.
