What actually remains from an idefix sale
The commission rate is only the first cut. From the sale price, idefix takes commission with 20% VAT added on top, you pay shipping, the state withholds a 1% e-commerce withholding tax, and you remit the VAT payable (sales VAT minus the VAT on cost, commission and shipping). Only after all of these do you see the real net profit — which is what the calculator above isolates.
Why the VAT-on-top model matters
On idefix a 15% commission is not 15% of the sale; the 20% VAT on top makes it about 18%. If you priced your product using Trendyol's VAT-inclusive logic, your idefix margin is thinner than you think. Break down the commission line in detail with the idefix commission calculator.
Pricing to a target margin
Use the calculator in reverse: fix your cost and rates, then adjust the sale price until the net margin hits your target. To understand the difference between margin and markup, see the profit margin calculator. Before joining a campaign, check that the discounted price still clears break-even.
Comparing with other marketplaces
The same product nets differently on each channel. Put idefix, Trendyol, Hepsiburada and n11 side by side with the marketplace profit comparison.
Method and sources
The calculator uses the rate you enter, the idefix VAT-on-top commission model, the 1% withholding tax base (VAT-excluded sale) and VAT payable (sales VAT minus the deductible VAT on product cost, commission and shipping; cost and shipping are entered VAT-inclusive, and a negative result carries over instead of adding to profit). Commission rates and the exact VAT position must be verified in the idefix seller panel and your accounting summary.