10 oz private label product in a 6 × 4 × 2 in box, $8 landed cost, 10% ad spend, 60 days storage, minimal placement: ⚡ Try this case live
| Line item | Amount | % of price |
|---|---|---|
| Referral fee (15%) | $4.50 | 15.0% |
| FBA fulfillment (0.75 lb large standard) | $4.20 | 14.0% |
| Fuel & logistics surcharge (3.5%) | $0.15 | 0.5% |
| Advertising (10%) | $3.00 | 10.0% |
| Inbound freight ($300 / 200 units) | $1.50 | 5.0% |
| Return amortization (8%) | $1.35 | 4.5% |
| Storage (60 days) | $0.04 | 0.1% |
| Inbound placement (minimal split) | $0.30 | 1.0% |
| Item / landed cost | $8.00 | 26.7% |
| Total fees + cost | $23.04 | 76.8% |
| Net profit / unit | $6.96 | 23.2% margin |
Break-even price: $20.57. On 1,000 units, this SKU earns $6,960 of net profit before taxes — and every 5-point ACoS increase shaves ~$1.50 off each unit.
Turn the break-even number into a first-order decision. At a $30 price, this product carries $9.43 of buffer above break-even (31% of revenue) — that is what absorbs returns, price dips and the first-quarter ACoS spike while reviews build. A product whose buffer is under 15% of price needs a reason to exist; at under 10%, one bad week of ads can put the whole reorder in the red.
The cash picture is separate from the profit picture. A 1,000-unit first order ties up $8,000 in landed cost, $1,500 in freight and a launch ad budget that spends before the first review lands — roughly $10,000–11,000 of working capital that takes 60–90 days to cycle back through sales. Run the same calculator on your planned reorder quantities at the mature ACoS, not the launch ACoS, before committing to the second order.
Use the FBA profit calculator to model your exact product, and the sourcing scorecard to validate the niche before you commit capital. Both run entirely in your browser; zero data stored.
Open the calculator with this $30 example → Score your product idea →
Related reading: How to Calculate FBA Profit Margin 2026, Six FBA profit calculation mistakes to avoid, Why Is My FBA Profit So Low? and Dimensional Weight: Formula & Rules. The full schedule is in Amazon FBA Fees 2026: Complete Guide; a plain walkthrough of the eight buckets is at How to calculate profit for FBA private label.
Net profit = price − referral fee − fulfillment fee − fuel surcharge − advertising − freight − storage − returns − landed cost. A worked $30 home product with $8 landed cost and 10% ads nets $6.96 (23.2%) at a $20.57 break-even price.
Landed cost is unit factory price plus freight, customs, insurance and packaging, divided by units. Most private label sellers miss packaging and customs, which together can add 5–10% to the number that should drive every pricing decision.
Launch phase runs 20–30% ACoS or higher; mature products target 10–20%. Model the target ACoS into the price before launch — at 10% on the $30 example ads take $3.00 per unit, more than fulfillment.
20–30% net margin after all fees is the healthy range for private label, and below 10% leaves no room for returns, storage spikes or price competition. New launches often run thinner for the first quarter while ACoS is high; what matters is that mature pricing still clears 20% before you commit to a reorder. Use the break-even price as your floor and the scorecard to validate the niche before ordering.
Before ordering inventory — score demand, competition, margin, differentiation, seasonality and compliance while the decision is still cheap. The exception: for reorders of a proven SKU the scorecard adds little; run the profit calculator instead and compare the reorder margin against your target.
Inbound freight ($1.50/unit on the example), return amortization, Q4 storage at $2.40/ft³, inbound placement fees, and the 3.5% fuel surcharge. Together they are the difference between a 44% "paper margin" and the real 23.2%.