QuickTax - Sell Project

Key Highlights:Complete tax calculation engine covering 67 countries, verified against official government sources — HMRC, IRS, SAT, DGFiP, BMF, ESTV, and the statutory authority for each jurisdiction. Not approximated from secondary sources: every bracket, rate, and deduction traced to a primary government publication for both 2025 and 2026 tax years.Production-ready REST API with Zod validation, rate limiting, Helmet security headers, and database-backed API key authentication — ready to integrate into any HR, payroll, or fintech platform.Complete billing system: Stripe checkout, PostgreSQL + Prisma, automatic API key issuance via email, subscription management — buyer pastes environment variables and billing is live in under 30 minutes.Admin panel at /admin: customer management, API key revocation, usage analytics.Live at quick-tax.store with 236 organic sessions from 12 countries since launch — zero paid advertising.82 unit tests with pinned numeric outputs and regression cases across all 67 countries, plus a 268-calculation country audit that runs on every deployment.Buyer saves 3–6 months of development time and $50,000+ in engineering costs — and avoids the harder problem: sourcing accurate, dual-year tax data for 67 jurisdictions from scratch.Operations:Runs fully autonomously. Hosted on Vercel with GitHub-connected auto-deploy pipeline. No staff, no recurring costs beyond domain renewal ($4/year). Time commitment after acquisition: near zero.The tax engine is built for maintainability — each country's logic lives in its own TypeScript file, sourced and documented. When tax law changes, the buyer knows exactly where to look and what to update.Customers:Ideal acquirer is a payroll software company, HR platform, fintech startup, or accounting SaaS looking to add international tax calculation without building from scratch. The live site demonstrates the product to any potential enterprise buyer.Current organic traffic: US (54%), France (12%), Netherlands (8%), UK (8%). Outreach completed to 89+ decision-makers at global HR, payroll, and fintech companies. Full Google Analytics data shared with verified buyers on request.Financials:Pre-revenue. This is a codebase and infrastructure acquisition, not a revenue business. The value is the engineering asset — 67 verified tax regimes, a production API, complete billing infrastructure, and a deployable frontend that would cost $50,000–$150,000 to replicate from scratch — and longer to get right, given the sourcing depth required.Additional Notes:Sale includes: full GitHub repository, live domain (quick-tax.store), Vercel hosting pipeline, complete source-verification records for all 67 countries (every figure traced to its official government source), and post-sale technical support for smooth handover.Built with React 18, TypeScript, Node.js, Express, PostgreSQL, Prisma, Stripe, Zod, Tailwind, shadcn/ui, and Docker. The API and frontend share the same tax engine — no logic duplication.