Nearshoring total cost of ownership: why unit price comparisons produce the wrong sourcing decision

Roughly 60% of companies have historically made offshore sourcing decisions by comparing wage rates, EXW prices, or landed costs. About 25% of products currently sourced offshore for US consumption would be more profitable if reshored, even without tariffs, once total cost of ownership is calculated correctly. Most procurement teams are leaving money on the table by ignoring the seven cost categories that make nearshoring the economically rational choice.

Landed cost — unit price plus freight, insurance, and duties — is where most procurement comparisons stop. Total cost of ownership is where they should start. The gap between the two is where sourcing errors live, and it is typically large enough to flip the decision.

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Landed cost captures 4 line items. TCO captures 8

Landed cost is narrow by design. It covers the transaction: unit price, packaging, planned freight and insurance, and customs duties. This is similar to cost of goods sold for purchased components, and it is what appears on most supplier comparison spreadsheets.

Total cost of ownership adds four categories that procurement teams routinely skip: inventory carrying costs, quality and compliance overhead, operational coordination, and disruption risk. Research on extended landed cost models finds that non-direct procurement costs — inventory holding, shipping, and overhead — can exceed direct manufacturing costs when sourcing from low-cost countries.

Inventory alone is a multi-million-dollar error in most models. Industry benchmarks put inventory carrying costs at 20-30% of inventory value per year, covering warehousing, insurance, obsolescence, and cost of capital. Offshore sourcing with 4-8 week lead times forces safety stock levels that nearshore suppliers with 1-3 day transit simply do not require. For a business holding $6M in inventory driven by long lead times, switching to nearshore supply that cuts inventory by 30% saves $1.5-1.8M per year.

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The quality overhead procurement teams never model

Quality costs from offshore sourcing are structural, not occasional. Distance magnifies every defect: a rejected batch from Asia means 4-6 weeks of replacement lead time versus 2-3 days from a nearshore supplier. The cost of that downtime — overtime, premium freight, rescheduled production, customer penalties — compounds with every incident.

"With global sourcing, the distance and time involved in resolving defects magnify those risks. A domestic supplier ships replacements faster and can provide technical support to help troubleshoot on the spot — minimizing disruption and long-term brand damage."
— Industrial Automation Co., 2025 sourcing cost analysis

Then there is the overhead of managing a distant supplier: quality audits, travel, time zone coordination, and project management. One detailed TCO case for a medical device product allocated $80,000 per year to quality oversight travel and audits for the offshore option, plus $60,000 for internal coordination and project management overhead. These costs do not appear on the supplier's quote, but they appear on the P&L.

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The disruption risk premium most teams price at zero

A McKinsey study estimated that supply chain disruptions cost the average company approximately 45% of one year's profits over a decade — an expected annual hit of about 4.5% of annual profit. Procurement teams that assign zero probability to a port shutdown, tariff shock, or supplier failure are not being conservative; they are being wrong.

The method for pricing disruption is straightforward: expected cost equals probability times financial impact. A conservative 5% annual probability of a significant disruption, applied to a category with $2.25M in annual spend, creates an annualized disruption risk provision of $112,500 for the offshore option. Nearshore suppliers, with shorter supply chains and geographic proximity, carry a materially lower probability.

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A real TCO comparison: Asia offshore vs. Mexico nearshore

A $1B consumer products company compared an incumbent Asian supplier at $0.92 per unit (FOB) against a nearshore supplier at $1.02 per unit (DDP). The unit price gap was $0.10 — roughly 11% — in favor of Asia. Standard procurement practice would select Asia.

The TCO analysis told a different story. Once logistics, duty, inventory carrying costs, quality and expedite expenses, and commercial terms were factored in, Asia landed at approximately $1.11 per unit. Nearshore came in at $1.07. The higher quoted price was more than offset by lower freight and duty, lower quality costs, reduced inventory, and fewer expedites. The company implemented a 70/30 nearshore/Asia split to retain competition and resilience.

A medical device TCO case produced an even starker result. The offshore option showed a $625,000 annual unit cost advantage on paper. After adding tariffs at a 7.5% effective rate, quality oversight travel and audits ($80,000), internal coordination overhead ($60,000), disruption risk provision ($112,500), and logistics and inventory carrying costs, nearshore won by approximately $226,875 annually. The unit-cost savings from offshoring evaporated completely.

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Building the TCO model: a 5-step framework

The goal is not to find the single right answer. It is to make the trade-offs visible. A nearshore option that costs 3% more in TCO but eliminates six-figure disruption exposure is a risk management decision the business should make deliberately, not accidentally through an incomplete spreadsheet.

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What this means in practice

• Audit your current sourcing comparisons. Pull the last three offshore sourcing decisions. For each, identify which cost categories beyond landed cost were included. If the answer is "none," run a retrospective TCO on the largest category by spend.
• Add explicit disruption premiums to every offshore sourcing model. A 5% annual probability of significant disruption with an estimated impact is a starting point. Adjust based on category criticality and supplier geography. The number will be debated. The absence of a number will cost more.
• Compute inventory carrying cost at 20-30% of inventory value. Factor in the delta between offshore lead-time inventory and what nearshore would require. This line item alone often covers the unit price gap.
• Model a 70/30 or 80/20 dual-sourcing split before committing to 100% nearshore. Dual sourcing preserves competition and provides a hedge. The optimal split emerges from the sensitivity analysis, not from a binary choice.
• Share the TCO model with finance before the next sourcing review. Procurement owns the supplier comparison, but finance owns the P&L. A TCO model that finance validates carries more weight with the CFO than a unit-price comparison the CPO defends alone.