Estimate your net profit, ROI, and Amazon fees instantly.
General Merchandise (15%)
Electronics (8%)
Apparel (17%)
Home & Kitchen (15%)
Health & Personal Care (12%)
Amazon Referral Fee:—
Estimated FBA Fulfillment Fee:—
Total Amazon Fees:—
Net Profit (Per Unit):—
Net Margin:—
Return on Investment (ROI):—
How to Calculate Amazon FBA Profits
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 understand your true "take-home" pay, you must look beyond the selling price and account for several layers of Amazon-specific costs.
The Core Components of FBA Fees
Referral Fees: This is Amazon's commission for bringing you the customer. For most categories, this is 15% of the total selling price.
Fulfillment Fees: This covers picking, packing, and shipping your product to the customer. It is calculated based on the weight and dimensions of your product.
Monthly Storage Fees: Amazon charges you for the space your inventory occupies in their warehouses. Rates increase significantly during the Q4 holiday season (October–December).
COGS (Cost of Goods Sold): Your manufacturing or wholesale purchase price per unit.
Example Calculation
Imagine you sell a Yoga Mat for $40.00. Your manufacturing cost is $10.00, and it costs $2.00 to ship it to an Amazon warehouse.
1. Referral Fee: $40.00 x 15% = $6.00
2. Fulfillment Fee: (Assuming Large Standard Size) ≈ $6.50
3. Storage Fee: ≈ $0.50
4. Total Expenses: $10 (COGS) + $2 (Ship) + $6 (Ref) + $6.50 (FBA) + $0.50 (Store) = $25.00
5. Net Profit: $40.00 – $25.00 = $15.00
6. ROI: ($15.00 / $12.00 total investment) = 125%
Tips for Improving FBA Margins
To maximize your profit, focus on reducing product dimensions to fit into smaller FBA size tiers. Additionally, monitor your IPI (Inventory Performance Index) score to avoid expensive long-term storage fees. Always factor in a 2-3% return rate to keep your financial projections realistic.
function calculateFBA() {
var price = parseFloat(document.getElementById('salePrice').value);
var cost = parseFloat(document.getElementById('itemCost').value);
var shipping = parseFloat(document.getElementById('shippingToAmz').value) || 0;
var weight = parseFloat(document.getElementById('itemWeight').value) || 0;
var categoryRate = parseFloat(document.getElementById('category').value);
var storage = parseFloat(document.getElementById('storageMonths').value) || 0;
if (isNaN(price) || isNaN(cost)) {
alert('Please enter at least the Sale Price and Product Cost.');
return;
}
// 1. Referral Fee
var referralFee = price * categoryRate;
if (referralFee < 0.30) referralFee = 0.30; // Minimum referral fee
// 2. FBA Fulfillment Fee (Simplified 2024 Tier estimation)
// Small standard: $3.22, Large standard: $3.80 – $6.50+
var fulfillmentFee = 0;
if (weight <= 0.5) {
fulfillmentFee = 3.25;
} else if (weight <= 1) {
fulfillmentFee = 3.85;
} else if (weight = 0 ? 'result-val profit-pos' : 'result-val profit-neg';
document.getElementById('resMargin').innerText = margin.toFixed(2) + '%';
document.getElementById('resROI').innerText = roi.toFixed(2) + '%';
}