Developer Releases Open-Source Calculator to Show True Seller Earnings on Software Marketplaces

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A developer building a source-code marketplace called esdecode created a free Seller Earnings Calculator after discovering how difficult it is to estimate actual payouts from a listed price. Marketplace commissions, payment-processing fees, VAT, refunds, and affiliate costs can significantly reduce what a seller ultimately receives. The tool correctly handles VAT-inclusive pricing, where the tax portion must be extracted from the gross price rather than simply applied as a percentage on top of it. The calculation engine, built in TypeScript, has been published as an open-source project on GitHub alongside a live web calculator. The tool is intended as an estimation aid, as actual tax treatment varies by seller, buyer, marketplace, and jurisdiction.

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