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Amazon FBA Profit Calculator

Calculate your net profit, margins, and ROI for Amazon FBA sales.

Amazon Referral Fee:
Total Amazon Fees:
Net Profit:
Profit Margin:
ROI (Return on Investment):

Understanding Amazon FBA Fees and Profitability

Selling on Amazon via Fulfillment by Amazon (FBA) is a powerful way to scale an e-commerce business, but understanding the unit economics is critical for survival. Many sellers focus on revenue while ignoring the hidden costs that erode margins.

Key Metrics Explained

  • Referral Fee: This is Amazon's commission for selling on their platform. For most categories, this is 15% of the total sales price.
  • FBA Fulfillment Fee: A per-unit fee that covers picking, packing, shipping, and customer service. This depends on the weight and dimensions of your product.
  • COGS (Cost of Goods Sold): The total cost to manufacture or purchase one unit from your supplier.
  • Profit Margin: The percentage of the sale price that remains as profit after all expenses. A healthy FBA margin is typically between 15% and 25%.

Example Calculation

Imagine you sell a yoga mat for $40.00. Your manufacturing cost is $10.00 and it costs $2.00 to ship to an Amazon warehouse.

  • Referral Fee (15%): $6.00
  • FBA Fee: $7.50
  • Storage: $0.20
  • Total Expenses: $10 + $2 + $6 + $7.50 + $0.20 = $25.70
  • Net Profit: $40.00 – $25.70 = $14.30
  • ROI: 119% (Profit / Cost of Goods)

function calculateFBAProfit() { var salePrice = parseFloat(document.getElementById('salePrice').value) || 0; var itemCost = parseFloat(document.getElementById('itemCost').value) || 0; var shippingCost = parseFloat(document.getElementById('shippingCost').value) || 0; var referralPct = parseFloat(document.getElementById('referralFeePct').value) || 0; var fbaFee = parseFloat(document.getElementById('fbaFee').value) || 0; var storageFee = parseFloat(document.getElementById('storageFee').value) || 0; if (salePrice 0 ? (netProfit / (itemCost + shippingCost)) * 100 : 0; // Display results document.getElementById('resReferral').innerText = "$" + referralFeeTotal.toFixed(2); document.getElementById('resTotalFees').innerText = "$" + totalAmazonFees.toFixed(2); var profitEl = document.getElementById('resProfit'); profitEl.innerText = "$" + netProfit.toFixed(2); profitEl.className = netProfit >= 0 ? "fba-result-value fba-profit-positive" : "fba-result-value fba-profit-negative"; document.getElementById('resMargin').innerText = margin.toFixed(2) + "%"; document.getElementById('resROI').innerText = roi.toFixed(2) + "%"; document.getElementById('fbaResults').style.display = 'block'; }

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