business calculator

Amazon FBA Profit Calculator

Calculate net seller profits, margins, and FBA fees.

Bookmark this FBA profit calculator

FBA storage, fulfillment, and referral fees fluctuate. Bookmark this page to rerun your margins as your sourcing cost or pricing strategy changes.

Saved runs

Inputs

Pricing & Sourcing Cost

Selling price$

Item cost (COGS)$

Shipping to warehouse$

FBA & Amazon Referral Fees

Referral Fee Preset

Fulfillment Size Preset

Referral fee rate (%)%

FBA fulfillment fee$

Monthly storage fee$

Results

Net Profit

$9.59

Net Margin31.98%

Return on Investment (ROI)89.64%

Referral Fee (Amazon Cut)$4.50

Total FBA Fees$9.70

Total Cost of Goods$20.40

Formula

Amazon FBA profit margin formula

Profit = Selling price - COGS - Shipping - Referral fee - Fulfillment fee - Storage fee

Net Margin = (Profit / Selling price) × 100. ROI = (Profit / (COGS + Shipping)) × 100.

Step by step

How the calculation works

1Enter your item listing selling price on Amazon.
2Provide the cost of goods sold (COGS) and inbound/outbound shipping costs.
3Select a referral fee category preset or specify your own percentage (most categories are 15%).
4Choose an FBA fulfillment size tier or input a custom fulfillment fee and monthly storage cost.

Related guides

Learn more about this calculation

Guide

Amazon FBA Profits: Calculating Seller Fees & Margins

A comprehensive, advanced guide to calculating Amazon FBA profits, margins, and fees to build a successful e-commerce brand.

Site Guide

Saving and Exporting Calculations: How to Keep Your Results

Learn how to save calculation results using browser bookmarks, local storage, screenshots, and export options for future reference and comparison.

Per-Unit Cost Breakdown

Shows how your selling price is distributed across item cost, shipping, Amazon fees, and net profit.

Item Cost$9

Shipping$2

Referral Fee$5

Fulfillment Fee$5

Storage Fee$0

Net Profit$10

How to understand and use this calculator

Understanding Amazon FBA fees

Selling on Amazon using the Fulfillment by Amazon (FBA) program involves several layers of fees that directly impact your profitability. The two primary categories of fees are referral fees and fulfillment fees.

Referral fees are essentially Amazon's sales commission. This is a percentage of the total selling price (usually 15% for most categories) charged for every item sold. Fulfillment fees cover the cost of picking, packing, shipping, and handling customer service for your items. These are flat fees based on the size tier and shipping weight of your product.

Profit margin vs. ROI in e-commerce

Many e-commerce sellers confuse net profit margin with return on investment (ROI). Net profit margin is the percentage of your selling price that remains as profit after all costs are deducted. It measures the overall efficiency of your pricing structure.

Return on investment (ROI) measures the efficiency of the cash you invest. In FBA, it is calculated as your net profit divided by your upfront inventory costs (cost of goods sold + shipping to the warehouse). A high ROI means your capital is working efficiently, allowing you to reinvest and scale your inventory quickly.

Optimizing your FBA cost structure

To maximize your profit margins, you should focus on optimizing FBA fees. Since fulfillment fees are highly dependent on weight and dimensions, reducing your product packaging size can drop your item into a lower size tier, saving dollars per unit.

Additionally, monitor monthly storage fees. Amazon charges storage based on the cubic volume your inventory occupies in their warehouses. High inventory turnover ensures you avoid costly long-term storage fees, especially during peak holiday periods.

Related concepts

COGS

Cost of Goods Sold includes the direct manufacturing cost of the product.

Net Margin

The percentage of revenue that remains as profit after deducting all operating costs.

Dimensional Weight

A billing weight calculation based on package volume rather than actual weight.

FAQs

What is the Amazon referral fee?

The referral fee is a category-specific commission fee charged by Amazon for listing and selling products on their platform. For most categories, this is 15% of the total customer purchase price.

How is the FBA fulfillment fee determined?

Fulfillment fees are calculated based on the unit weight and dimensions of the packaged item. Amazon uses distinct size tiers (such as Small Standard, Large Standard, and Oversize) to determine the baseline rate.

Why is ROI critical for Amazon sellers?

ROI tells you how much profit your invested cash generates. Since buying inventory requires upfront capital, knowing your ROI helps you decide which products are worth purchasing and how quickly you can turn a profit.

How the calculation works

1Enter your item listing selling price on Amazon.

2Provide the cost of goods sold (COGS) and inbound/outbound shipping costs.

3Select a referral fee category preset or specify your own percentage (most categories are 15%).

4Choose an FBA fulfillment size tier or input a custom fulfillment fee and monthly storage cost.

Per-Unit Cost Breakdown

Shows how your selling price is distributed across item cost, shipping, Amazon fees, and net profit.

Item Cost$9

Shipping$2

Referral Fee$5

Fulfillment Fee$5

Storage Fee$0

Net Profit$10

How to understand and use this calculator

Understanding Amazon FBA fees

Profit margin vs. ROI in e-commerce

Optimizing your FBA cost structure

Related concepts

COGS

Cost of Goods Sold includes the direct manufacturing cost of the product.

Net Margin

The percentage of revenue that remains as profit after deducting all operating costs.

Dimensional Weight

A billing weight calculation based on package volume rather than actual weight.

FAQs

What is the Amazon referral fee?

The referral fee is a category-specific commission fee charged by Amazon for listing and selling products on their platform. For most categories, this is 15% of the total customer purchase price.

How is the FBA fulfillment fee determined?

Why is ROI critical for Amazon sellers?

Amazon FBA Profit Calculator

Bookmark this FBA profit calculator

Inputs

Pricing & Sourcing Cost

FBA & Amazon Referral Fees

Results

Amazon FBA profit margin formula

How the calculation works

Learn more about this calculation

Amazon FBA Profits: Calculating Seller Fees & Margins

Saving and Exporting Calculations: How to Keep Your Results

Amazon FBA Profit Calculator

Bookmark this FBA profit calculator

Inputs

Pricing & Sourcing Cost

FBA & Amazon Referral Fees

Results

Key output metrics

Per-Unit Cost Breakdown

How to understand and use this calculator

Understanding Amazon FBA fees

Profit margin vs. ROI in e-commerce

Optimizing your FBA cost structure

Related concepts

FAQs

Amazon FBA profit margin formula

How the calculation works

Learn more about this calculation

Amazon FBA Profits: Calculating Seller Fees & Margins

Saving and Exporting Calculations: How to Keep Your Results

Key output metrics

Per-Unit Cost Breakdown

How to understand and use this calculator

Understanding Amazon FBA fees

Profit margin vs. ROI in e-commerce

Optimizing your FBA cost structure

Related concepts

FAQs