Calculate net profit, margins, and ROI for your Amazon FBA business
Product Revenue & Costs
Amazon Fees & Marketing
Result Summary
Amazon Fees (Est.)
$0.00
Net Profit
$0.00
Profit Margin
0.00%
ROI
0.00%
How to Use the Amazon FBA Profit Calculator
Calculating your potential earnings is the most critical step for any Amazon seller. This Amazon FBA Profit Calculator helps you break down the complex fee structure of the Fulfillment by Amazon program to see if your product idea is viable.
Key Components Explained
Referral Fee: Amazon charges a percentage of the total sales price (usually 15% for most categories). Our calculator automatically factors this into the total fees.
Fulfillment Fee: This is the cost for Amazon to pick, pack, and ship your product. It varies based on the dimensions and weight of your item.
COGS (Cost of Goods Sold): This includes the manufacturing cost per unit and any sourcing agent fees.
PPC Spend: Marketing costs are often overlooked. Divide your monthly ad budget by your monthly units sold to find your per-unit PPC cost.
Example Calculation Scenario
Scenario: You sell a yoga mat for $40.00.
– Product Cost: $10.00
– Shipping to Amazon: $2.00
– Amazon Referral Fee (15%): $6.00
– FBA Fulfillment Fee: $7.50
– Ad Spend per unit: $4.00 Total Expenses: $29.50 Net Profit: $10.50 Profit Margin: 26.25%
Why Profit Margin Matters
Successful Amazon sellers typically aim for a profit margin of at least 20-25%. This "buffer" is necessary to handle unexpected returns, price fluctuations, and increasing competition. If your margin is below 15% after all fees and marketing, you may need to reconsider your sourcing price or the product niche.
function calculateFBAProfit() {
// Get Input Values
var sellingPrice = parseFloat(document.getElementById('fba_selling_price').value) || 0;
var productCost = parseFloat(document.getElementById('fba_cogs').value) || 0;
var shipToAmazon = parseFloat(document.getElementById('fba_shipping').value) || 0;
var fulfillmentFee = parseFloat(document.getElementById('fba_fulfillment').value) || 0;
var storageFee = parseFloat(document.getElementById('fba_storage').value) || 0;
var adSpend = parseFloat(document.getElementById('fba_ads').value) || 0;
// Logic: Referral Fee is generally 15% for most categories
var referralFee = sellingPrice * 0.15;
// Total Amazon Fees (Referral + Fulfillment + Storage)
var amazonFeesOnly = referralFee + fulfillmentFee + storageFee;
// Total Out-of-pocket Costs
var totalExpenses = productCost + shipToAmazon + fulfillmentFee + storageFee + adSpend + referralFee;
// Net Profit
var netProfit = sellingPrice – totalExpenses;
// Margin & ROI
var margin = 0;
if (sellingPrice > 0) {
margin = (netProfit / sellingPrice) * 100;
}
var roi = 0;
var totalInvestment = productCost + shipToAmazon;
if (totalInvestment > 0) {
roi = (netProfit / totalInvestment) * 100;
}
// Display Results
document.getElementById('fba_results_area').style.display = 'block';
document.getElementById('res_total_fees').innerHTML = '$' + amazonFeesOnly.toFixed(2);
document.getElementById('res_profit').innerHTML = '$' + netProfit.toFixed(2);
document.getElementById('res_margin').innerHTML = margin.toFixed(2) + '%';
document.getElementById('res_roi').innerHTML = roi.toFixed(2) + '%';
// Color coordination for negative profit
if (netProfit < 0) {
document.getElementById('res_profit').style.color = '#d9534f';
document.getElementById('res_margin').style.color = '#d9534f';
document.getElementById('res_roi').style.color = '#d9534f';
} else {
document.getElementById('res_profit').style.color = '#28a745';
document.getElementById('res_margin').style.color = '#28a745';
document.getElementById('res_roi').style.color = '#28a745';
}
// Scroll to results on mobile
if (window.innerWidth < 600) {
document.getElementById('fba_results_area').scrollIntoView({ behavior: 'smooth' });
}
}