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French Fleet Software Firm Open-Sources Vehicle Tax Calculators for Developers

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Lexio, a French fleet-management software company, has released four open-source TypeScript packages covering key vehicle-related tax and compliance calculations. The tools include a company-vehicle tax engine (TVS), a benefit-in-kind calculator for company cars, a rental-contract generator, and a fine-contestation letter builder. The packages were extracted from Lexio's internal codebase to provide dependency-free, framework-agnostic reference implementations that other developers can use or audit. The move was driven by the frequency of tax-rule changes in France and the tendency of payroll and fleet tools to implement subtly incorrect versions of the same calculations. The repositories, which include 72 regression tests validated against official French administration figures, are publicly available on GitHub under the lexio-rent-git organisation.

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French Fleet Software Firm Open-Sources Vehicle Tax Calculators for Developers · ShortSingh