In this article, learn about:
- Why the changeover costs more than the new supplier’s unit price suggests
- The four onboarding failures that quietly turn into chargebacks
- What a second or third supplier adds to your operational load
- How sell-through and inventory visibility surfaces a bad transition before quarter close
Most writing about a supplier diversification strategy stops at the decision: which country, which supplier, what the landed cost looks like on a spreadsheet. That analysis matters, and by the time a team is mid-transition it is already done. The harder question starts the day after the contract is signed.
The margin risk sits in the changeover itself. New item data has to reach your systems and your retailers accurately. A new electronic data interchange (EDI) connection has to be built and tested. Retailer compliance has to hold while one source winds down and another ramps. Each step has a failure mode with a dollar figure attached, and none of them show up in the sourcing model.
Why Does Switching Suppliers Cost More Than the Switch Suggests?
Sourcing changes are now routine. Deloitte’s 2026 Retail Industry Global Outlook surveyed 330 retail executives. Of those, 66 percent plan to restructure supply chains through onshoring, nearshoring, or supplier diversification if input costs rise this year. Another 95 percent expect costs to rise because of trade policy.
What that activity hides is that the fix has its own price. Lifetime Brands said so plainly in its FY2026 quarterly filing. The company’s tariff mitigation strategy was meant to hold gross margin dollars steady, and may therefore lower gross margin percentage. The filing also describes carrying more inventory value, paying duties before the goods sold, and moving production across the supply base. This is a company running a plan it chose, saying in writing that the plan moves margin.
The same pattern holds at smaller scale. A transition can run two weeks long. A new supplier can spend a month getting a retailer’s requirements right. Either one can cost more than the duty it was meant to avoid.
What Do Tariff Mitigation Strategies for Suppliers Actually Cost?
Sourcing shifts move slower than the policy changes that set them off. At Manifest 2026, Brooklinen COO Rachel Levy told a panel that moving sourcing to a new country can’t happen overnight. The company has not been chasing countries in response to new tariffs or trade deals. US-sourced cotton avoids some duties, she said, but supply is limited, and leaning on it too hard would add complexity elsewhere.
Patagonia points the same direction. Chief Supply Chain Officer Todd Soller said on that panel that some sourcing moved from Asia to Central America, with a small amount in the US. The supply base itself has not changed much, partly because tariffs raised the water level fairly equally across the world.
The legal ground keeps moving too. On February 20, 2026, the Supreme Court ruled 6-3 in Learning Resources v. Trump that the International Emergency Economic Powers Act does not give the president the power to set tariffs. Those orders were invalidated soon after. Tariffs under other authorities, including Section 232 and Section 301, are still in force. One legal basis went away and others did not. The math behind a nearshoring versus offshoring comparison can shift again before a transition finishes.
Where Does Margin Leak During Supplier Onboarding?
Protecting margins during supply chain disruption comes down to how well the handoff runs. The failure points are specific and they repeat.
Item Setup Errors
A new supplier means new item data: UPCs, dimensions, case pack configurations, product descriptions, hazard classifications. That data has to match what the retailer already has on file. When it does not, the retailer can’t receive the goods cleanly, and the correction happens after the shipment instead of before it.
Related Reading: GS1 Standards for New Suppliers: GTINs, UPCs, and Case Codes
Missing or Late ASNs
The advance ship notice (ASN) tells a retailer what is arriving, in what cartons, on what pallets, before the truck reaches the dock. A new supplier sending its first ASNs through a new connection is the most likely moment for that document to be late, incomplete, or mismatched against the physical shipment. Retailers assess penalties for all three.
Compliance Requirements That Arrive Late
Routing guides, labeling specifications, and packaging rules differ by retailer and change without much warning. A supplier that has never shipped to your retailers has not absorbed any of it yet. The requirements often reach the new supplier after the first purchase orders do.
Related Reading: How To Read a Routing Guide Without Missing the Rules That Cost You
Chargebacks During the Learning Curve
Each of the above generates deductions, and deductions arrive weeks after the shipment that caused them. By the time a finance team sees the first wave on a remittance, the new supplier has already shipped several more loads the same way. The lag is what makes the total surprising.
Related Reading: EDI Chargebacks Explained
What Onboarding at Scale Looks Like When It Works
MSC Industrial Supply Co works the distributor side of this problem, not the supplier side, so the parallel is directional rather than exact. The mechanism is still the same. In an SPS Commerce case study, MSC brought new suppliers online smoothly, from large enterprises down to small family operations, and cut overstocked inventory without falling short of demand. Connection quality and data quality are what made the onboarding repeatable.
Related Reading: Grocery Supply Chain Issues: 3 Pressures Reshaping 2026
Does a Dual Sourcing Strategy in Manufacturing Multiply the Risk?
Dual sourcing cuts concentration risk, which is the reason to do it. It also doubles the onboarding events, compliance relationships, and item data sets your team maintains. Two suppliers for one component means two sets of specifications to keep current and two connections that can fail on their own.
That tradeoff is worth making and worth planning. In its 2026 retail risk analysis, WTW recommends a practice that carries straight over to sourcing work:
- Map critical suppliers, including the ones a step removed from you
- Identify single points of failure across that map
- Model specific scenarios, such as a transportation delay or a supplier shutdown, and price them
Companies that do this before a transition tend to discover that the constraint is rarely the supplier itself. It is usually the time and staff needed to bring a supplier fully online.
How Do You Spot a Bad Transition Before It Reaches the P&L?
Sell-through and inventory data from your retailers is the earliest honest signal that a transition is going badly. Units stop moving at certain stores. Inventory sits where it should be turning. A region quits reordering. These signs show up weeks before the deduction detail and the quarterly margin number catch up.
Suppliers who see this early have usually solved the access problem first. Leatherman spent years asking retailer buyers for spreadsheets before meetings, then decoding whatever format came back. Once the data landed in one steady view, the company had sales and inventory insight covering more than 75 percent of its domestic sales. Wolverine put the same kind of retail data in front of its sales teams every Monday to find regions, stores, and products that needed attention. In one case the data turned up untapped sales, and the retailer doubled its fall order.
Neither company was running a sourcing transition. The capability is the same: enough view of what is actually selling to catch a problem while it is still small. During a transition, that window is short.
Frequently Asked Questions
How long does it usually take to fully onboard a new supplier?
It depends on retailer complexity and the supplier’s existing EDI capability, but the connection is rarely the long pole. Item data accuracy and compliance readiness usually decide when a new source can ship without drawing deductions.
Should we hold the old supplier while the new one ramps?
Many companies do, and that overlap is a real cost worth modeling. A hard cutover packs every onboarding failure into the same weeks your fill rate is exposed.
Does nearshoring reduce this execution risk?
Not on its own. A nearshore supplier still needs correct item data, a working connection, and current retailer requirements. Shorter transit times help you recover faster from a mistake, which is not the same as making fewer of them.
What is the first sign a transition is eroding margin?
Usually a change in sell-through or inventory position at a few accounts, followed weeks later by deduction volume. The finance signal arrives last.
Want a Clearer View of How a Sourcing Transition Is Actually Performing?
A sourcing transition throws off scattered, hard-to-trust data: new supplier performance, shifting landed cost, sell-through by SKU across different retailers. SPS Analytics brings retail sales, inventory, and item performance into one steady view, so a transition going sideways shows up while there is still time to fix it. To be plain about the fit: Analytics is the layer that catches margin erosion early. It is not the tool that picks your new supplier.
Not ready to talk about software? The Supply Chain Source has practical resources on supplier onboarding, compliance, and chargeback recovery.
This article discusses trade policy and tariff developments for general informational purposes only. It is not legal, tax, or customs advice, and requirements change. Consult qualified counsel before making sourcing or compliance decisions.