Pricing Backwards From Net Profit
Almost every e-commerce seller prices forward: take COGS, add a multiple, check the competitive landscape, and see what the market will bear. The reverse method — picking a target net profit per unit and building the price up from there — is rarer, harder, and almost always produces a more defensible and sustainable price point.
Why forward pricing fails
Forward pricing fails because it anchors on cost rather than value, and it defers the profit calculation to after the pricing decision is made. The typical outcome: a price that "seems competitive," a margin that "looks okay," and a unit economics model that was never actually closed. Three months into selling, the seller discovers that platform fees, returns, and ad costs were not fully accounted for, and the price that seemed profitable is generating minimal or negative net profit per unit.
The more fundamental problem is that forward pricing makes the seller a price-taker rather than a price-setter. You start with your cost and work up to what the market will take. Reverse pricing inverts the process: you start with the profit you need, add every cost with precision, and determine whether the resulting price is achievable in your market. If it is not, the product economics are broken at the current COGS and the right response is to fix COGS — not to accept a price that does not work.
The reverse pricing model
Start with the net profit you need per unit. This should be a specific number tied to your business objectives — not "as much as possible" but a precise figure. For example: $8 per unit on a product you expect to sell 1,000 units per month generates $8,000/month in net profit contribution from that SKU. Is $8,000/month the right target for the resources (capital, inventory, operational overhead) this SKU requires? That question should drive your target net profit figure.
From your target net profit, add back every cost layer: your estimated ad spend per unit (use your real CAC from existing channels or a conservative estimate for new products), platform commission and fees (use the correct platform-specific rates), outbound shipping to the customer, landed COGS including all components described in the landed cost article. The sum of net profit + all costs = your required selling price.
You cannot price what you cannot measure.
Running the model for each channel
Because platform fees differ significantly across TikTok Shop, Amazon FBA, Etsy, and Shopify, the reverse pricing model produces a different required price for each channel. A product that needs to sell for $32 on Amazon to generate $8 net profit might need to sell for only $28 on TikTok (lower fees) or $35 on Etsy (higher fees). This means you may price the same product differently across channels — which is both legal and common among sophisticated multi-channel operators.
Use the NetSellerProfit cross-channel comparison to run the reverse calculation simultaneously across all four major channels. Enter your COGS, shipping, and ad spend, then adjust the revenue input until you see your target net profit figure. The revenue input at that point is your minimum viable price for that channel. Compare across channels to decide where to list first and at what price.
Price testing and elasticity
Once you have a minimum viable price, test above it. Price elasticity in e-commerce is often better than sellers assume, particularly for differentiated products with strong visual presentation and social proof. A $2 price increase on a $28 product that reduces conversion by 5% but increases net profit per unit by $2 is a net positive if you are volume-constrained or margin-constrained. Always test pricing changes with sufficient sample size (minimum 200–300 orders per variant for statistical significance in most categories).
When the reverse price is too high for the market
If the reverse-priced number exceeds your target market's willingness to pay, you have a product economics problem, not a pricing problem. The solutions are limited: reduce COGS (better supplier negotiation, higher volume, design-for-cost), reduce CAC (better creative, improved targeting, organic channel development), reduce platform fees (different channel mix, different fulfilment method), or accept a lower net profit target for this SKU and subsidise it with a higher-margin product in your range.
The fourth option — price below your minimum viable price and "make it up in volume" — is how brands die slowly. Volume amplifies a negative-margin unit into a larger loss. If the unit economics do not work at your minimum viable price, selling more units does not fix them. It accelerates the cash drain until you run out of working capital. The reverse pricing model forces this confrontation before launch, not after three months of negative contribution margin.