Calculate your net profit, margins, and ROI for Amazon FBA products.
Total Revenue:
Amazon Fees (Referral + FBA):
Total Costs:
Net Profit:
Profit Margin:
ROI (Return on Investment):
How to Calculate Amazon FBA Profits Accurately
Success on Amazon depends on more than just high sales volume; it relies on healthy margins. Our Amazon FBA Profit Calculator helps sellers account for every hidden fee that eats into the bottom line.
Understanding the Key Inputs
Selling Price: The final price the customer pays for your product on the Amazon marketplace.
COGS (Cost of Goods Sold): The price you pay your manufacturer per unit, including any packaging costs.
Referral Fee: Amazon charges a percentage of the total sales price (usually 15%) as a commission for selling on their platform.
FBA Fulfillment Fee: This covers picking, packing, and shipping your product to the customer. It is based on the weight and dimensions of the item.
Storage Fees: Amazon charges monthly fees to store your inventory in their fulfillment centers. These fees typically increase during Q4 (October–December).
Example Profit Calculation
If you sell a product for $30.00, and your manufacturing cost is $7.00:
Referral Fee (15%): $4.50
Fulfillment Fee: $5.00
Shipping to Amazon: $0.50
Storage: $0.10
PPC Spend per unit: $3.00
Your total costs would be $20.10, leaving you with a Net Profit of $9.90 per unit. This represents a 33% profit margin and a 141% ROI on your initial $7.00 product cost.
Why Monitoring ROI and Margin Matters
A "Net Profit Margin" tells you how much of every dollar earned you keep as profit. An "ROI" tells you how effectively you are using your capital. Most successful FBA sellers aim for a minimum of a 25-30% margin to account for unexpected returns or price wars with competitors.
function calculateFBAProfit() {
// Get Input Values
var price = parseFloat(document.getElementById('fba_selling_price').value) || 0;
var cost = parseFloat(document.getElementById('fba_item_cost').value) || 0;
var shipToAmazon = parseFloat(document.getElementById('fba_shipping_to_amazon').value) || 0;
var referralPercent = parseFloat(document.getElementById('fba_referral_fee').value) || 0;
var fulfillmentFee = parseFloat(document.getElementById('fba_fulfillment_fee').value) || 0;
var storageFee = parseFloat(document.getElementById('fba_monthly_storage').value) || 0;
var ppc = parseFloat(document.getElementById('fba_ads_ppc').value) || 0;
var other = parseFloat(document.getElementById('fba_other_costs').value) || 0;
// Logic Calculations
var referralFeeAmount = price * (referralPercent / 100);
var totalAmazonFees = referralFeeAmount + fulfillmentFee + storageFee;
var totalOtherExpenses = cost + shipToAmazon + ppc + other;
var totalCosts = totalAmazonFees + totalOtherExpenses;
var netProfit = price – totalCosts;
var margin = price > 0 ? (netProfit / price) * 100 : 0;
// ROI is calculated on the capital invested (Cost + Shipping + PPC/Other)
var investedCapital = cost + shipToAmazon + ppc + other;
var roi = investedCapital > 0 ? (netProfit / investedCapital) * 100 : 0;
// Display Results
document.getElementById('fba_results_box').style.display = 'block';
document.getElementById('res_revenue').innerText = '$' + price.toFixed(2);
document.getElementById('res_amazon_fees').innerText = '$' + totalAmazonFees.toFixed(2);
document.getElementById('res_total_costs').innerText = '$' + totalCosts.toFixed(2);
var profitEl = document.getElementById('res_net_profit');
profitEl.innerText = '$' + netProfit.toFixed(2);
profitEl.className = 'result-value ' + (netProfit >= 0 ? 'profit-positive' : 'profit-negative');
document.getElementById('res_margin').innerText = margin.toFixed(2) + '%';
document.getElementById('res_roi').innerText = roi.toFixed(2) + '%';
}