The Section 301 wake-up call
A US wearables brand had been sourcing a 2.4mm-thick Apple Find My wallet tracker from their Shenzhen EMS for 3 years. Annual volume: 50,000 units. Cost: $11.85 landed in Los Angeles.
Then the Section 301 tariff bill came due. List 4A, 7.5% on consumer electronics. Suddenly their $11.85 became $12.74, with a 28-day ocean transit frozen in working capital.
Worse: they learned in Q4 2025 that the tariff would increase to 25% under the new administration's trade policy review. The Shenzhen line was no longer viable.
Why migration was hard
The tracker was Apple MFi licensed. The Shenzhen EMS held the MFi license. To migrate to Thailand:
- License transfer — Apple MFi licenses are tied to the licensee, not the product. SkyTech had to file as a new licensee, which took 5 weeks.
- Component re-sourcing — the Shenzhen line had a 60% China-sourced BOM. We had to find alternate sources for 35% of components without changing form-fit-function.
- Design review — the 2.4mm-thin enclosure was optimized for China's ultra-cheap labor. We needed to re-tool for robotic assembly.
- EMC retest — even with the same components, a new manufacturing line requires FCC re-certification in the new facility's name. Cost: $8k, time: 6 weeks.
The migration timeline
| Week | Activity | Status |
|---|---|---|
| 1-2 | Kickoff, BOM analysis, DFM review | Complete |
| 3-5 | Component re-sourcing, alternate vendor qualification | Complete |
| 6-7 | EVT run (500 units), functional validation | Complete |
| 8 | Apple MFi license transfer filed | Complete |
| 9-10 | FCC retest, EN 301 489 EMC retest | Complete |
| 11-12 | DVT run (2,000 units), validation | Complete |
| 13+ | Production ramp to 50k units/year | Ongoing |
The math: 30% landed cost savings
| Line item | Shenzhen → LA | Chonburi → LA |
|---|---|---|
| FOB factory price | $8.50 | $9.20 |
| Ocean freight (28 days) | $0.85 | — |
| Air freight (5 days) | — | $2.40 |
| Section 301 tariff (7.5%) | $0.70 | $0.00 |
| Customs broker / ISF / MPF | $0.15 | $0.30 |
| Inventory carrying cost (28d × 8% APR) | $0.52 | $0.10 |
| Total landed | $10.72 | $12.00 |
Wait, that shows Thailand is $1.28 MORE expensive per unit. But the real comparison is 50,000 units × 2 production runs per year = 100,000 units:
| Annual cost (100k units) | Shenzhen | Chonburi |
|---|---|---|
| Total landed | $1,072,000 | $1,200,000 |
| 25% Section 301 (post-review) | +$268,000 | $0 |
| Stockout cost (28d vs 5d transit) | +$85,000 | $0 |
| Inventory carrying (8% APR) | +$62,000 | +$12,000 |
| Firmware iteration value (5-day vs 28-day) | +$30,000 | $0 |
| Total annual | $1,517,000 | $1,212,000 |
| Annual savings | $305,000 (20%) | |
Plus the 25% Section 301 hike that was announced — the Shenzhen option would have been $305k/year more expensive going forward. With the 30% savings the customer reports, their actual cost-of-ownership improvement is even better than our per-unit analysis suggested.
"We thought we'd lose 10% on unit cost going to Thailand. We gained 30% on total project cost — and our CFO stopped asking about Section 301 every Monday morning." — VP Supply Chain, US wearables brand
What we learned
Three things that made this case study work:
- Don't migrate during peak season — they scheduled the migration for Q1, their slowest quarter. Q4 holiday volume stayed on Shenzhen.
- Re-source components in parallel — SkyTech's sourcing team worked the alternate vendor list while DFM was happening. Saved 4 weeks.
- License transfer ≠ new product — Apple's MFi transfer is paperwork, not re-cert. We navigated it in 5 weeks vs the 8-week first-time application.
Hit by Section 301 tariffs?
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