Free tool

Marketplace Fees
& Ad Spend Calculator

How does my total marketplace cost change based on commission rates and ad performance?

How do I calculate the true cost impact of marketplace fees and advertising spend?

This easy-to-use calculator helps marketplace sellers quickly assess their total cost burden by analyzing both marketplace commissions and advertising expenses.

It breaks down:
• How ad spend affects overall profitability
• What percentage of sales comes from advertising
• The combined impact of fees and ad costs on your bottom line

Marketplace Cost Calculator

$
$
Sales Breakdown
?
Breakdown of sales attributed to ads vs. organic sales
Ad-Attributed Sales
?
Sales directly attributed to sponsored product ads
Non-Attributed Sales
?
Organic sales not attributed to sponsored product ads
Performance Metrics
?
Key metrics to evaluate advertising performance
TACOS
?
Total Advertising Cost of Sales - Ad spend as a percentage of total sales
Cost % on Attributed Sales
?
Total costs (commission + ad spend) as a percentage of ad-attributed sales
Overall Cost Breakdown
?
Total marketplace costs broken down by type
Commission
Ad Spend
Total

Free Marketplace commission & Ad Calculator

This comprehensive yet free tool is designed to help marketplace sellers understand and optimize their total marketplace costs - from commission fees to advertising investments.

Whether you're selling on Amazon, Walmart, Citrusads or other platforms, this calculator delivers clear insights into your true cost of doing business.

With just a few simple inputs like Total Sales, Commission Rate, Ad Spend, and ROAS, this user-friendly calculator provides instant analysis of:
• Sales breakdown between organic and ad-attributed revenue
• Total marketplace costs as a percentage of sales
• Commission impact on profitability
• Advertising efficiency metrics (TACOS)

Transform your marketplace strategy from guesswork to data-driven decisions. Perfect for brands, sellers, and agencies looking to optimize their marketplace presence and profitability.

FAQs

Questions and answers about our free Marketplace Commission & Ad Calculator

Contact
Why such a calculator?

This calculator helps marketplace sellers understand and optimize their true cost of doing business by analyzing both marketplace fees and advertising expenses in one place. Instead of juggling multiple spreadsheets or guessing at profitability, sellers can quickly see how commission rates and ad performance combine to impact their bottom line, enabling smarter decisions about pricing, advertising budgets, and overall marketplace strategy.

How does it work?

Simply input your basic sales data (total sales, commission rate, ad spend, and ROAS), and the calculator instantly shows you a complete breakdown of your marketplace costs and performance metrics. The tool automatically calculates key metrics like ad-attributed sales, organic sales, total cost percentage, and advertising efficiency, presenting them in an easy-to-understand format.

What if I want to contribute?

If you would like to add new KPIs or suggest changes or corrections, please contact us!

What is mimbi's role in the retail media industry?

mimbi.io provides a retail media intelligence platform designed to help both brands and agencies better allocate their budgets and inform the next cycle of their advertising strategy. It provides data aggregation to bring together retail media networks, business data and teams in a transparent way.
More about our bids calculations for sponsored products .

Ready to break silos?

Datas silos slow your growth. Discover mimbi to make all your channel work together and manage ads for profitability.

mimbi collect sources examples
mimbi home dashboard
mimbi share destinations examples