🛒 Guide · 2026-04-20
Coupang Seller Onboarding — From First SKU to Break-Even
A practical playbook for new Coupang sellers — set first-SKU pricing and break-even using category fees, RocketGrowth, and ad ROAS.
How new Coupang sellers most often go broke
- Pricing without knowing the category fee — A 10.8% (food) vs. 10.5% (fashion) gap can wipe out margin.
- Forgetting RocketGrowth costs — Box-tier inbound fees (₩600/1,800/3,500), outbound, and storage are routinely omitted, leading to "revenue = profit" thinking.
- No ROAS break-even — Running Coupang SP ads chasing 200% ROAS while margin quietly evaporates.
Step 1 — Category mapping
Find your exact category fee in Coupang Wing’s 2026 schedule. Food / fashion sit in the 10s, electronics 7–8%, books 4%.
Step 2 — Break-even math
In the Coupang Seller Profit Calculator, enter:
- Selling price
- COGS (manufacturing + packaging)
- Category fee
- RocketGrowth box tier (S/M/L)
You’ll see per-unit net profit and break-even price. Your selling price should sit at least 5% above BEP for margin stability.
Step 3 — RocketGrowth vs. self-shipping
Simulate the same SKU under both:
| Dimension | RocketGrowth | Self-shipped |
|---|---|---|
| Exposure priority | High | Normal |
| Logistics | Inbound + storage | Own carrier |
| Margin profile | Lower margin, faster turn | Higher margin, slower turn |
For new sellers, start with RocketGrowth. Re-evaluate self-shipping after 6 months of turn data.
Step 4 — First ad campaign
Coupang SP Ads ROAS Calculator gives you:
- Break-even ROAS (factoring fees & margin)
- Minimum CPC
- Recommended daily budget (given an assumed CVR)
Run Coupang SP ads at ≥ 1.3× the break-even ROAS.
Step 5 — 30-day KPIs
- Average ROAS ≥ break-even ROAS × 1.3
- Repeat-purchase rate ≥ 5%
- Storage cost ≤ 3% of revenue
Bottom line
Coupang takes ~60% of gross margin via fees + logistics + ads. If you don’t price all three together at launch, you fall into the classic "revenue up, bank account flat" trap.