Amazon Seller Margin Calculator

Calculate your real Amazon profit margin after referral fees, FBA fulfillment costs, storage fees, and shipping to Amazon. Find your break-even price and monthly profit potential before committing to a product.

Selling Price*(currency)

The price you list your product for on Amazon, before any discounts or promotions.

Cost of Goods Per Unit*(currency)

Your landed cost per unit including manufacturing, packaging, and any import duties.

Referral Fee %*(percent)

Amazon charges a referral fee on each sale, typically 15% for most categories. Some categories like electronics or clothing have different rates.

FBA Fee Per Unit*(currency)

The fulfillment fee Amazon charges per unit for picking, packing, and shipping. This varies by product size and weight tier.

Monthly Storage Cost Per Unit*(currency)

Amazon FBA storage fee per unit per month. Standard-size items typically cost $0.75-$2.40 per cubic foot depending on the season.

Shipping to Amazon Per Unit*(currency)

Your cost to ship each unit to Amazon's fulfillment center, including freight, prep fees, and labeling.

Units Sold Per Month*(units)

The estimated number of units you expect to sell per month at this price point.

Additional Costs Per Unit(currency)

Any other per-unit costs such as PPC advertising cost per unit, returns allowance, or insurance.

Selling on Amazon involves a complex stack of fees that can erode margins fast. This calculator helps Amazon sellers and prospective FBA sellers model their per-unit economics by factoring in the referral fee, FBA fulfillment fee, monthly storage cost, inbound shipping, and cost of goods. It shows your profit per unit, profit margin, break-even selling price, and projected monthly and annual profit so you can make informed sourcing and pricing decisions.

How It Works

Amazon Seller Profit Formula

Profit Per Unit = Selling Price − Referral Fee − FBA Fee − Storage − Shipping to Amazon − Cost of Goods − Additional Costs

Profit per unit is calculated by subtracting all Amazon fees and your product costs from the selling price. The referral fee is a percentage of the selling price. All other fees and costs are per-unit fixed amounts. Monthly and annual projections multiply per-unit profit by sales volume.

Referral fee is a percentage of the selling price that Amazon charges for access to its marketplace. The standard rate is 15% for most categories.

FBA fulfillment fee covers picking, packing, and shipping your product to the customer. It varies by size tier and weight, typically ranging from $3.22 to $10+ per unit.

Monthly storage fee is charged per cubic foot of warehouse space your inventory occupies. Rates increase during Q4 (October through December).

Shipping to Amazon is your cost to send inventory to FBA warehouses, including freight, prep services, and labeling.

Break-even price is calculated as the total per-unit costs divided by (1 - referral fee percentage), representing the minimum viable selling price.

Important Notes:

•This calculator uses simplified per-unit economics. Actual Amazon fees vary by category, product dimensions, weight, and season.
•FBA fees change periodically. Always verify current rates using Amazon's FBA Revenue Calculator or the fee schedule in Seller Central.
•Storage costs are higher during Q4 (October-December) and for items stored longer than 365 days, which incurs aged inventory surcharges.
•This calculator does not account for PPC advertising ROI, returns and refunds rate, or long-term storage fees separately unless entered in additional costs.
•Break-even price calculation assumes the referral fee percentage stays constant. Some categories have minimum referral fees that may apply at lower price points.

Worked Example

A private label seller lists a product at $29.99 with a cost of goods of $8.00. Amazon charges a 15% referral fee, $5.50 FBA fee, $0.75 monthly storage, and the seller pays $1.25 to ship each unit to Amazon. They expect to sell 200 units per month.

Inputs:

selling Price:29.99
cost Of Goods:8
referral Fee Pct:15
fba Fee Per Unit:5.5
monthly Storage Cost Per Unit:0.75
shipping To Amazon:1.25
units Per Month:200
additional Costs:0

Result:

The referral fee is $4.50 per unit. Total costs per unit come to $20.00 (COGS $8.00 + referral $4.50 + FBA $5.50 + storage $0.75 + shipping $1.25). Profit per unit is approximately $10.00, giving a profit margin of about 33%. Monthly profit would be approximately $2,000 and annual profit approximately $24,000. The break-even price is approximately $18.24.

Who Is This Calculator For?

amazon sellers
fba sellers
ecommerce entrepreneurs
product sourcing professionals
private label sellers

Frequently Asked Questions

The referral fee is a percentage of the total sales price (including shipping) that Amazon charges for each item sold. Most categories have a 15% referral fee, but some like personal computers (6%), consumer electronics (8%), and grocery (8-15%) have different rates. There is also a minimum referral fee of $0.30 per item in most categories.

FBA (Fulfillment by Amazon) fees cover the cost of storing your inventory in Amazon's warehouses and fulfilling orders. This includes picking, packing, shipping, and customer service. Fees are based on the product's size tier and weight, ranging from about $3.22 for small standard items to $10 or more for large or heavy items.

Monthly storage fees are charged per cubic foot of space your inventory occupies. Standard rates are roughly $0.87 per cubic foot from January to September and $2.40 per cubic foot from October to December. Items stored for over 365 days incur additional aged inventory surcharges.

Most experienced Amazon sellers aim for a profit margin of 25% to 50% before advertising costs. After PPC advertising, a net margin of 15% to 30% is considered healthy. Below 15% leaves too little room for returns, fee changes, and advertising spend.

The break-even price is the minimum selling price where revenue equals total costs. This calculator computes it by adding all per-unit costs (COGS, FBA fee, storage, shipping) and dividing by (1 minus the referral fee percentage). Selling above this price generates profit; selling below creates a loss.

FBA generally makes sense if the higher fees are offset by increased sales from Prime eligibility, Buy Box advantages, and hands-off fulfillment. Self-fulfillment (FBM) can be more profitable for large, heavy, or slow-moving items where FBA fees and storage costs are disproportionately high. Use this calculator to model FBA costs, then compare with your own fulfillment expenses.

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Last updated: April 11, 2026