Amazon FBA vs Shopify Net Profit & Margin Calculator
Compare side-by-side net profits, platform fees, pick & pack costs, and customer acquisition costs (CAC).
Amazon FBA vs Shopify Net Profit & Margin Calculator
Compare Amazon FBA referral & fulfillment fees vs Shopify payment fees, shipping & Meta ad CAC.
📦 Core Product Unit Economics
📦 Amazon FBA Costs
🛍️ Shopify DTC Costs
📊 Per-Unit Financial Comparison
What is the Amazon FBA vs Shopify Net Profit & Margin Calculator?
The Amazon FBA vs Shopify Net Profit & Margin Calculator provides a side-by-side financial comparison of selling physical products on Amazon FBA vs your own Shopify store.
Both e-commerce channels offer distinct cost structures:
- Amazon FBA: Instant customer trust and Prime traffic, but charges 15% Referral Fees, $4.00–$7.00 FBA Fulfillment/Pick-Pack Fees, and Storage Fees.
- Shopify DTC: Full customer data ownership and 2.9% payment processing, but requires heavy Paid Ad Customer Acquisition Cost (CAC) (Facebook/Google Ads).
This calculator models your product retail price, COGS, shipping, Amazon FBA fee tier, Amazon PPC vs Shopify Meta Ad CAC to output Net Profit Per Unit, Monthly Net Income, and Net Margin % Comparison.
How Does the Amazon FBA vs Shopify Net Profit & Margin Calculator Work?
1. Enter Monthly Product Units Sold — Input units sold per month (e.g. 1,000 units).
2. Set Retail Selling Price & COGS — Input product price ($40) and unit manufacturing cost ($10).
3. Set Amazon FBA Fees & PPC — Input Amazon referral fee (15%), FBA pick-pack fee ($5.50), and Amazon PPC cost per unit ($4.00).
4. Set Shopify Shipping & Ad CAC — Input Shopify payment fee (2.9% + $0.30), self-fulfillment shipping cost ($6.00), and Meta Ad CAC per order ($12.00).
5. View Side-by-Side Profit Split — Compare net profit per unit, monthly net profit, and ROI between Amazon and Shopify.
Formula & Calculation Method
1. Amazon FBA Profit per Unit:
$$\text{Amazon Fees} = (\text{Price} \times 0.15) + \text{FBA Pick-Pack Fee} + \text{Amazon PPC/Unit}$$
$$\text{Amazon Net Profit/Unit} = \text{Price} - \text{COGS} - \text{Amazon Fees}$$
2. Shopify DTC Profit per Unit:
$$\text{Shopify Fees} = (\text{Price} \times 0.029 + 0.30) + \text{Shipping Cost} + \text{Ad CAC/Unit}$$
$$\text{Shopify Net Profit/Unit} = \text{Price} - \text{COGS} - \text{Shopify Fees}$$
Example Calculation
Example: $40 Product with $10 COGS selling 1,000 units/month
- Amazon FBA: 15% Referral ($6) + FBA Fee ($5.50) + Amazon PPC ($4.00) = $15.50 fees
- Amazon Net Profit per Unit = $40 - $10 - $15.50 = $14.50/unit ($14,500/mo net)
- Shopify DTC: 2.9% Payment ($1.46) + Shipping ($6.00) + Meta Ad CAC ($12.00) = $19.46 fees
- Shopify Net Profit per Unit = $40 - $10 - $19.46 = $10.54/unit ($10,540/mo net)
Verdict: Amazon FBA yields $3,960/month higher net profit for this specific product due to lower ad CAC!