Sourcing Cost

Reshoring Cost Estimation: What Actually Drives Cost Per Unit

A breakdown of the cost drivers behind a defensible reshoring quote, from the domestic labor premium to the working-capital and quality lines estimators routinely miss.

A reshoring quote lives or dies on how honestly you load the domestic labor premium. Direct labor is often 60 to 75 percent cheaper offshore in fully loaded terms, but labor is rarely more than 12 to 20 percent of a machined or molded part's cost. So a domestic shop paying $32 per hour fully burdened against an $8 offshore rate looks catastrophic until you weight it: if labor is 15 percent of a $9.00 part, the $24 gap on 4 minutes of touch time adds only about $1.60 per unit, not the 4x the raw rate implies. The Domestic Labor Premium calculator forces that weighting so the premium is sized to actual content.

Material is usually origin-neutral, and estimators lose credibility when they pretend otherwise. Steel, resin, and aluminum trade on global indices, so a domestic supplier buying hot-rolled coil at $840 per ton is not structurally disadvantaged against an offshore shop paying a similar landed index price. The real material spread comes from scrap and yield: an offshore shop running 6 percent scrap against a domestic 3 percent on a part with 55 percent material content shifts cost by roughly 1.6 percent of piece price. Quote material at index plus a defined yield loss, and hold both suppliers to the same bill of materials so the comparison is clean.

Freight and duty are the swing lines that most quotes underweight or double-count. On a $9.00 offshore part, ocean freight at realistic container fill runs $0.05 to $0.12 per unit, but a 25 percent duty on a $9.08 CIF value adds $2.27, dwarfing everything else. The mistake is quoting duty on FOB price rather than CIF, understating it by the freight and insurance amount, or ignoring that duty compounds on the higher offshore piece cost. Run the duty line through the Import Duty Scenario Cost and Freight Risk Savings calculators so a rate change or a $3,000 container spike shows up as a per-unit number, not a surprise on the invoice.

Working capital is the cost line finance cares about and procurement forgets. A 55-day ocean lead time plus 30-day payment terms means a part is paid for 40 to 60 days before it sells, tying up cash at your weighted cost of capital. On $9.00 units moving 10,000 per month, roughly 80 days of pipeline and safety stock is about $270,000 locked up; at a 12 percent cost of capital that is $32,400 a year, or $0.27 per unit. Domestic sourcing at a 7-day lead time frees most of that. A defensible quote assigns this a line item rather than burying it in overhead.

Quality and requalification costs decide the total, not the piece price. Budget PPAP, first-article inspection, and tooling transfer as a one-time load: $200,000 to $500,000 is typical to stand up a new domestic supplier on a mid-complexity part, and that amortizes across the program volume. On 360,000 lifetime units, a $340,000 switch cost adds $0.94 per unit if you count it against the full run, or far more if the program is short. Separate recurring quality cost, a 1.5 percent defect rate at $12 disposition is $0.18 per unit, from these one-time loads so the quote shows both the ramp and the steady state.

Overhead allocation is where two honest estimators reach different numbers. A domestic shop carrying $2.8 million in annual burden across 40,000 machine hours applies $70 per hour; if your part needs 0.08 hours, that is $5.60 of overhead absorption, and a small change in the shop's total hours moves it 10 to 15 percent. Ask for the burden rate and the basis, not just a piece price, so you can normalize between a high-overhead domestic shop and a low-overhead offshore one. The Sourcing Total Cost of Ownership calculator keeps these allocations visible instead of hiding them in a single number.

The most defensible quote is a scenario band, not a point estimate. Present procurement with three landed numbers tied to freight and duty assumptions: a low case near $10.60, a base near $11.42, and a high case near $12.90 on the same part. State the trigger for each, a duty rollback, a container-rate spike, a currency move, so the reader sees the range and the sensitivity. The Reshoring Cost Comparison and Nearshoring Landed Cost tools generate these bands quickly, which matters when a quote has to survive a duty change three months after you signed it.

Estimates go wrong in predictable places, so build the checklist in. Duty quoted on FOB instead of CIF understates by 5 to 10 percent. Freight computed on theoretical container capacity rather than real fill understates by 40 to 100 percent. Labor premiums applied to the full piece price instead of labor content overstate the offshore advantage by 2x to 4x. One-time switch costs spread over an optimistic volume that never materializes wreck the payback. Cross-check every offshore quote against a fully loaded Supplier Relocation ROI before you present it, so the number you defend is the number that holds.

Published 2026-07-01.