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Precision at the service of your profitability
Precision at the service of your profitability
Simulate real product profitability on any marketplace
Automatic Amazon commission by category
Local FBA fees, VAT, PPC, Costs...
Seasonal storage surcharges taken into account
Automatic imperial conversion for USA dimensions
From intuition to informed decision
From intuition to informed decision
Calculate your TACoS, breakeven ACOS and max PPC spend
Model the impact of returns and certification fees
Visualize your cost structure with stacked bars
Save, compare and export your simulations
Import existing simulations to refine your strategy
Key Features
Multi‑marketplace coverage
60 countries, switch marketplace in one click, fees and VAT auto‑updated.
Full COGS calculation
Purchase, shipping, quality control, accessories – all broken down.
Up‑to‑date Amazon fees
Commission, FBA, monthly storage (standard/peak), FBA category detected.
Advanced PPC indicators
TACoS, breakeven ACOS, max PPC spend per sale.
Export & save
Cloud save, JSON export, simulation import.
Glassmorphism UI
Frosted glass cards, focus on key figures, smooth animations.
Why use Profit Lab?
PROFIT LAB – Precision at the service of your profitability.
In international trade, an error of a few cents in estimating fees can wipe out your margin. Profit Lab puts an end to Excel guesswork. In seconds, you simulate the real profitability of a product on any of the 60 Amazon marketplaces covered. The simulator automatically applies category commissions, local FBA fees, current VAT, customs duties, and even seasonal storage surcharges. Switch countries with one click: rules and currencies adapt instantly, as does the conversion of dimensions to imperial for the US market. You get a reliable net margin, not an approximation.
From intuition to informed decision.
Profit Lab goes beyond simple margin calculation. It integrates your PPC spend to calculate your TACOS, your break-even ACOS, and the maximum ad spend per sale. It models the impact of returns, certification fees, transport variations, and visualizes your cost structure in a stacked bar chart. Each simulation can be saved, compared, exported as JSON, or re-imported to refine your strategy. You no longer guess whether a launch is viable: you know, with figures to back it up, before you even place an order.
Key market figures
30-40%
of the selling price absorbed by Amazon fees (commission + FBA + storage) before profit
8-15%
Amazon commission rate depending on the category
20%
standard VAT in France, with significant variations across countries
x3 to x4
increase in storage fees during Q4 compared to the standard rate
2-3 pts
of net margin lost for a 10% increase in customs duties
5-15%
variation in supply cost due to exchange rates over a few months
1 in 3
sellers reports that hidden fees have significantly reduced their margin
Frequently asked questions
How to calculate the profitability of an Amazon FBA product before buying it?
Use a margin simulator like Profit Lab. It automatically applies commissions, FBA fees, VAT and customs duties for 19 marketplaces, giving you a reliable net margin in seconds.
What are the real Amazon FBA fees per marketplace in 2026?
Fees vary by marketplace, category and dimensions. Profit Lab keeps them up to date: commissions (8-15%), local FBA fees, monthly storage, and seasonal surcharges.
How to calculate your net margin on Amazon in 30 seconds?
With Profit Lab, enter your purchase price and select your target marketplace. The simulator applies all fees and instantly gives you your net margin, TACOS and break-even ACOS.
What is TACOS and how to optimize it?
TACOS (Total Advertising Cost of Sale) measures your advertising spend relative to your total revenue. Profit Lab calculates it automatically and helps you define your maximum PPC spend to remain profitable.
What is the difference between TACOS and ACOS?
ACOS only considers sales generated by ads; TACOS includes all sales (organic + sponsored). Profit Lab calculates both to give you a complete picture.
How to include VAT and customs duties in your profitability calculation?
Profit Lab automatically integrates local VAT and customs duties (TARIC basis) for the destination country. Switch marketplaces with one click and the rules apply instantly.
What selling price to set to be profitable on Amazon USA vs Europe?
With Profit Lab, simulate different selling prices and compare profitability across marketplaces. The tool automatically converts dimensions to imperial for the USA and applies local fees.
How do seasonal storage fees impact margin?
Q4 storage fees can be 3 to 4 times higher than the standard rate. Profit Lab includes these surcharges in its calculations to avoid unpleasant surprises.
Ready to calculate your profitability in 30 seconds?
Activate Profit Lab and never launch a product without knowing exactly how much it will earn.