/ /Marketplace Net Profit Calculator
Marketplace Net Profit Calculator
Whole-account net profit across marketplaces: gross sales less COGS, fees, ads, shipping, returns, and overhead — with true net margin.
Account Inputs
Gross Sales ($)
COGS ($)
Marketplace + Payment Fees ($)
Advertising ($)
Shipping + Fulfillment ($)
Returns + Refunds ($)
Overhead ($)
Net Profit
Gross Sales$50000.00
Total Costs-$38000.00
Net Profit$12000.00
Net Margin24.0%
Account verdict: The account nets $12000.00 (24.0% margin) on $50000.00 sales. Healthy: reinvest in winning ASINs.
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Authoritative References
Frequently Asked Questions
How is marketplace net profit calculated?
Gross Sales minus COGS, marketplace and payment fees, ads, shipping, returns, and overhead. With $50,000 sales and $38,000 total costs, net is $12,000 (24%).
What net margin should marketplace sellers target?
10-20% blended across channels after every cost. Single-channel stars can exceed 20%; sub-5% blended means fees or ads need surgery.
Why do sellers overstate marketplace profit?
They omit returns, storage overages, disposal, coupon costs, and tool subscriptions. True-all-in accounting usually shaves 3-8 points off claimed margins.
How should ads factor into net profit?
Include full ad spend in the period (TACOS view) and separately track ad-attributed contribution. Both views prevent ROAS vanity from hiding profit reality.
When should I expand to another marketplace?
When blended net margin holds above 10% and hero SKUs have 90 days of stock cover. New channels add reconciliation load — expand from strength.