2026 Coupang & SmartStore fees · Target margin back-calculation · Rocket Delivery vs seller shipping
Coupang·SmartStore Price Optimizer
한국어

Coupang Seller Starter Checklist 2026 — From Zero to First Sale

From paperwork to first sale takes roughly 3–4 weeks. This 2026 checklist orders the steps most new sellers miss.

1. Business registration

  1. Business registration certificate via hometax.go.kr (code 525101)
  2. Mail-order business registration via gov.kr (~40K KRW)
  3. Separate business bank account
  4. Category-specific permits (food, medical, cosmetics, adult goods)

2. Platform signup

  • Coupang Wing: wing.coupang.com, 1–2 day review
  • SmartStore: sell.smartstore.naver.com, same-day to 1 day

3. Product listing

  • Title: 3 core keywords + specs, under 70 chars
  • Thumbnail: white background, product only, no watermarks
  • Detail page: mobile-first, under 4,000px tall

4. First 20 reviews

  1. Coupang experience program
  2. 30% launch coupon
  3. Friends/family purchases (within review guidelines)
  4. Post-delivery review request after 3 days

5. Start ads at 20 reviews + 4.5 rating

  • Initial budget: 300–500K KRW/month
  • Test 20 keywords → concentrate top 5 at week 2
  • CPC cap: 80–150 KRW by category
  • Double budget when ROAS exceeds 600%

6. Keep return rate under 5%

Clear size/color, ship within 24h, proper packaging, prompt CS replies.

7. 3-month KPI

  • Month 1: 20 reviews, 4.5+ rating
  • Month 2: 10+ sales/mo, ROAS 400%+
  • Month 3: 30+ sales/mo, ROAS 600%+, returns under 5%

FAQ

Q1. What documents does Coupang seller signup require?

Four basics: business registration certificate, mail-order business registration, ID, and bank account for settlement. Simplified individual sellers need only the business registration; food/medical/adult goods require extra permits.

Q2. Where do I file mail-order business registration?

Apply online at gov.kr; file with your district office. Fee: 40–45K KRW. Issued in 3–7 business days. Simplified taxpayers earning under 48M KRW/year can request exemption.

Q3. Coupang or SmartStore first?

Beginners should start with SmartStore: next-day settlement and simpler fees. Add Coupang Open Market once stable, then switch to Rocket Growth at 50+ units/month.

Q4. How much starting capital?

At least 3M KRW (1.5M stock + 500K packaging/shipping + 1M initial ad budget) for 1–2 SKUs. Plan 5M+ KRW to start with Rocket Growth.

Q5. What to do in the first 3 months?

Month 1: list products, capture details, secure 20 reviews. Month 2: test 20 keywords, concentrate budget on top 5. Month 3: check ROAS 600%, scale up or replace SKU.