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VAT Engine
EU VAT calculation and compliance API for e-commerce
VAT Engine turns official EU TEDB data into a developer-friendly API for e-commerce. Resolve current or historical VAT by country, product class, and supply date; calculate exact tax amounts; store audit-ready transaction evidence; monitor OSS thresholds; and prepare OSS/IOSS reports. It combines EU-27 coverage, 37 merchant-friendly tax classes, source profiles, and compliance reporting in one workflow—without spreadsheets or country-by-country plugins. Currently in alpha.
Hi Product Hunt! I’m Vasyl, the founder and builder of VAT Engine.
I started working on VAT Engine because EU VAT becomes complicated very quickly. The applicable rate can depend on the customer’s country, product type, supply date, business status, thresholds, and reporting scheme. Smaller e-commerce and SaaS teams are often left combining spreadsheets, generic tax APIs, and separate platform plugins.
VAT Engine is my attempt to turn that complexity into one developer-friendly workflow. It imports official EU TEDB data, maps the underlying categories into merchant-friendly tax classes, resolves current or historical rates, calculates VAT in exact minor units, and stores the result as audit-ready transaction evidence. That same data can then support OSS threshold monitoring, quarterly previews, exports, and future commerce integrations.
GPT-5.6 has become part of my engineering workflow rather than just a tool for generating isolated snippets. I use it across architecture, implementation, Go backend work, Next.js frontend work, test design, security reviews, documentation, and release verification. The biggest benefit is being able to maintain context across a large system and keep moving from a product requirement to tested, documented code.
VAT Engine is currently in alpha and under active development. I’d especially appreciate feedback from developers, e-commerce founders, accountants, and finance teams about the API design, tax-class model, and OSS/IOSS reporting workflow.
About VAT Engine on Product Hunt
“EU VAT calculation and compliance API for e-commerce”
VAT Engine was submitted on Product Hunt and earned 12 upvotes and 7 comments, placing #111 on the daily leaderboard. VAT Engine turns official EU TEDB data into a developer-friendly API for e-commerce. Resolve current or historical VAT by country, product class, and supply date; calculate exact tax amounts; store audit-ready transaction evidence; monitor OSS thresholds; and prepare OSS/IOSS reports. It combines EU-27 coverage, 37 merchant-friendly tax classes, source profiles, and compliance reporting in one workflow—without spreadsheets or country-by-country plugins. Currently in alpha.
On the analytics side, VAT Engine competes within API, Developer Tools and E-Commerce — topics that collectively have 656.4k followers on Product Hunt. The dashboard above tracks how VAT Engine performed against the three products that launched closest to it on the same day.
Who hunted VAT Engine?
VAT Engine was hunted by Vasyl Kyryliuk. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of VAT Engine including community comment highlights and product details, visit the product overview.
Vasyl Kyryliuk