A rule of thumb for a healthy Amazon FBA net margin: split the selling price into three roughly equal parts — one third to Amazon (referral fee + fulfillment fee and other platform costs), one third to landed cost of goods (manufacturing + inbound shipping), and one third back to you as net profit. A 33% net margin on price is equivalent to roughly a 100% return on the landed cost invested per unit.
Because the split is fixed, you can work backward from your target selling price: subtract the known/estimated Amazon-side costs (referral fee, FBA fulfillment fee) and your target one-third profit from the selling price; whatever remains is the ceiling you can pay for landed cost per unit. If a supplier's quote (including inbound shipping) comes in above that ceiling, the product/supplier combination doesn't clear the bar — move to a different supplier or a different product rather than accept a thinner margin.
This heuristic operates on price allocation rather than an absolute profit-dollar threshold, so it works alongside metrics like Minimum Daily Profit Benchmark (Product Go/No-Go Threshold) and screening rules like Three-Part Profitability Filter (Volume, Price Floor, Margin Stack) — one asks whether a third of the price is left over, the other asks whether the absolute daily profit is big enough to be worth running. Feeds from, and checks against, the cost figures assembled in Amazon Profitability & Real-Cost Validation Toolkit.
Beyond being a general profitability benchmark, the rule of thirds is used as an active negotiating tool: the target profit third is calculated first, then subtracted — along with Amazon's fees/fulfillment costs from the Amazon Revenue Calculator Tool — from the target selling price to get a maximum acceptable cost of goods (see Reverse-Engineered COGS Ceiling). Any supplier quote above that ceiling is rejected outright rather than negotiated on, turning the 33%-margin target into a hard pre-contact cutoff.
Из тем: Product Research & Validation