The Complete Guide to Air Freight vs Sea Freight from China

Sample development has three stages with different costs. Stage 1 — existing sample or stock item: free or low cost, typically 1-3 days. Stage 2 — modified sample based on existing design: medium cost, 5-10 days. Stage 3 — fully custom sample: highest cost, 15-30 days. Many buyers skip to Stage 3 when Stage 1 or 2 would suffice. Save your custom development budget for when it truly matters.

Tariff classification (HS code) determines your duty rate. Different suppliers may classify the same product under different HS codes. Always verify the correct HS code and check if your product qualifies for preferential duty rates under trade agreements. An incorrect classification can result in overpayment or customs penalties. Request the supplier's export HS code and compare it with your import country's classification.

The sourcing cycle from initial contact to first shipment typically takes 3-6 months for new products. Month 1: supplier research and initial contact. Month 2: sample development and evaluation. Month 3: negotiation and order placement. Month 4: production (varies by product). Month 5: inspection and shipping. Month 6: delivery and evaluation. Plan your inventory accordingly and don't expect to compress this timeline without cutting corners.