.fba-calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 850px;
margin: 20px auto;
background: #ffffff;
border: 1px solid #e1e4e8;
border-radius: 8px;
overflow: hidden;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
color: #333;
}
.fba-calc-header {
background-color: #232f3e;
color: #ffffff;
padding: 25px;
text-align: center;
}
.fba-calc-header h2 {
margin: 0;
font-size: 24px;
color: #ff9900;
}
.fba-calc-body {
padding: 30px;
display: grid;
grid-template-columns: 1fr 1fr;
gap: 30px;
}
@media (max-width: 600px) {
.fba-calc-body {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
font-weight: 600;
margin-bottom: 5px;
font-size: 14px;
}
.input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.calc-button {
background-color: #ff9900;
color: #131921;
border: none;
padding: 15px 25px;
font-size: 18px;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
width: 100%;
transition: background 0.3s;
margin-top: 10px;
}
.calc-button:hover {
background-color: #e68a00;
}
.results-panel {
background-color: #f7f9fa;
padding: 20px;
border-radius: 8px;
border: 1px solid #e1e4e8;
}
.result-item {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px border #eee;
}
.result-item:last-child {
border-bottom: none;
}
.result-label {
font-weight: 500;
}
.result-value {
font-weight: 700;
color: #232f3e;
}
.profit-highlight {
color: #2e7d32;
font-size: 22px;
}
.loss-highlight {
color: #d32f2f;
font-size: 22px;
}
.article-content {
padding: 30px;
border-top: 1px solid #eee;
line-height: 1.6;
}
.article-content h2 { color: #232f3e; margin-top: 25px; }
.article-content h3 { color: #444; margin-top: 20px; }
.article-content ul { padding-left: 20px; }
Total Revenue:
$0.00
Referral Fee:
-$0.00
Total Expenses:
-$0.00
Net Profit:
$0.00
Margin:
0%
ROI:
0%
Understanding Amazon FBA Profitability
Selling on Amazon through the Fulfillment by Amazon (FBA) program offers incredible scale, but it comes with a complex fee structure. To run a successful e-commerce business, you must look beyond the top-line revenue and understand your true net profit.
Key Metrics Explained
- Selling Price: The final amount the customer pays for your product on the Amazon marketplace.
- COGS (Cost of Goods Sold): The price you pay your manufacturer for the product, including packaging.
- Referral Fee: Amazon's "commission" for selling on their platform. For most categories, this is 15%.
- Fulfillment Fee: A flat fee per unit based on the weight and dimensions of the product, covering picking, packing, and shipping to the customer.
- ROI (Return on Investment): Calculated as (Net Profit / Product Cost). This shows how effectively your capital is working for you.
Example Calculation
Imagine you sell a yoga mat for $40.00. Your costs are:
- Product Cost: $10.00
- Shipping to Amazon: $1.00
- Amazon Referral Fee (15%): $6.00
- FBA Fulfillment Fee: $7.50
- Advertising (PPC) per unit: $2.50
In this scenario, your Total Expenses are $27.00. Your Net Profit is $13.00. Your Profit Margin is 32.5%, and your ROI is 130%.
How to Improve Your FBA Margins
If your margins are slim, consider these strategies:
- Optimize Packaging: Reducing the size or weight can drop your FBA Fulfillment Fee tier.
- Bulk Shipments: Lower your inbound shipping costs by sending larger quantities to Amazon warehouses.
- Price Testing: Small increases in selling price often have the biggest impact on net profit, provided sales velocity remains stable.
- Supplier Negotiation: As your volume increases, renegotiate your COGS to improve the bottom line.
function calculateFBAProfit() {
var salePrice = parseFloat(document.getElementById('fba_sale_price').value) || 0;
var itemCost = parseFloat(document.getElementById('fba_item_cost').value) || 0;
var shipToAmazon = parseFloat(document.getElementById('fba_shipping_to_amazon').value) || 0;
var referralPercent = parseFloat(document.getElementById('fba_referral_fee').value) || 0;
var fulfillmentFee = parseFloat(document.getElementById('fba_fulfillment_fee').value) || 0;
var miscCosts = parseFloat(document.getElementById('fba_misc_costs').value) || 0;
// Logic
var referralFeeAmount = salePrice * (referralPercent / 100);
var totalExpenses = itemCost + shipToAmazon + referralFeeAmount + fulfillmentFee + miscCosts;
var netProfit = salePrice – totalExpenses;
var margin = 0;
if (salePrice > 0) {
margin = (netProfit / salePrice) * 100;
}
var roi = 0;
var totalInvestment = itemCost + shipToAmazon;
if (totalInvestment > 0) {
roi = (netProfit / totalInvestment) * 100;
}
// Display
document.getElementById('res_revenue').innerText = '$' + salePrice.toFixed(2);
document.getElementById('res_referral').innerText = '-$' + referralFeeAmount.toFixed(2);
document.getElementById('res_expenses').innerText = '-$' + totalExpenses.toFixed(2);
var profitElement = document.getElementById('res_net_profit');
profitElement.innerText = '$' + netProfit.toFixed(2);
if (netProfit < 0) {
profitElement.className = 'result-value loss-highlight';
} else {
profitElement.className = 'result-value profit-highlight';
}
document.getElementById('res_margin').innerText = margin.toFixed(2) + '%';
document.getElementById('res_roi').innerText = roi.toFixed(2) + '%';
}