Calculate your net profit, margins, and ROI for Amazon FBA sales.
General (15%)
Electronics (8%)
Clothing (17%)
Home & Garden (12%)
Amazon Device Accessories (45%)
Amazon Referral Fee:
FBA Fulfillment Fee:
Total Amazon Fees:
Net Profit:
Profit Margin:
Return on Investment (ROI):
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 the fee structure can be complex. To ensure your business is sustainable, you must accurately calculate every cent that leaves your pocket before your product reaches the customer.
Key Fees in the FBA Calculation
Referral Fees: This is effectively Amazon's commission. For most categories, this is 15% of the total sales price. However, categories like consumer electronics can be as low as 8%, while clothing can be higher.
Fulfillment Fees: These fees cover picking, packing, shipping, and customer service. They are determined by the weight and dimensions of your product.
Cost of Goods Sold (COGS): The total cost to manufacture or acquire the product from your supplier.
Shipping to Amazon: Often overlooked, this is the cost to send your inventory from your warehouse or supplier to an Amazon Fulfillment Center.
Example FBA Profit Breakdown
Let's say you sell a Yoga Mat for $40.00.
Unit Cost: $10.00
Shipping to Amazon: $2.00
Referral Fee (15%): $6.00
FBA Fulfillment Fee: $7.50
Total Expenses: $25.50
Net Profit: $14.50
ROI: 120.8%
How to Improve Your FBA Margins
To increase your profit, consider optimizing your packaging to reduce dimensions, which can move your product into a lower FBA fulfillment tier. Additionally, sourcing in larger quantities can reduce your per-unit COGS and shipping costs. Always monitor your monthly storage fees, especially for slow-moving inventory, as these can eat into profits over time.
function calculateAmazonFBA() {
var salePrice = parseFloat(document.getElementById('salePrice').value);
var unitCost = parseFloat(document.getElementById('unitCost').value);
var shipToAmazon = parseFloat(document.getElementById('shipToAmazon').value) || 0;
var categoryRate = parseFloat(document.getElementById('category').value);
var fbaFee = parseFloat(document.getElementById('fbaFeeManual').value) || 0;
if (isNaN(salePrice) || isNaN(unitCost)) {
alert("Please enter both the Sale Price and Unit Cost.");
return;
}
// Calculate Referral Fee
var referralFee = salePrice * categoryRate;
// Amazon usually has a minimum referral fee of $0.30
if (referralFee < 0.30) { referralFee = 0.30; }
// If FBA fee is not entered, estimate it based on weight (simplified logic)
// Small standard: ~$3.50, Large standard: ~$5.50+
if (fbaFee === 0) {
var weight = parseFloat(document.getElementById('weight').value) || 0;
if (weight <= 0.5) {
fbaFee = 3.22;
} else if (weight <= 1) {
fbaFee = 3.77;
} else if (weight = 0 ? 'profit-positive' : 'profit-negative';
document.getElementById('resMargin').innerText = margin.toFixed(2) + '%';
var roiEl = document.getElementById('resROI');
roiEl.innerText = roi.toFixed(2) + '%';
roiEl.className = roi >= 0 ? 'profit-positive' : 'profit-negative';
}