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A Modern Compiler for the French Tax Code

arxiv.org Research & data Research papers Software engineering Candidate
Screenshot of arxiv.org captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
3
submitters
3
observed span
2020–2024
peak thread · 130 comments
189 pts
latest 20+ return · 2023-01-30
189 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

I wish the state officially makes their income tax calculation available as machine-executable open-source software in an industry-standard language. For example, a Python function that takes a dictionary of inputs (gross income, number of dependents, capital gains, etc.) and produces a dictionary of outputs (federal tax, state tax, rebates, contribution limits, etc.). This would solve many problems: The verbosity and ambiguity of human language (tax laws, tax calculation forms in English), the ability to inspect…

nayuki·189-point thread·

> In France, income tax is computed from taxpayers' individual returns, using an algorithm that is authored, designed and maintained by the French Public Finances Directorate (DGFiP). This algorithm relies on a legacy custom language and compiler originally designed in 1990, which unlike French wine, did not age well with time. This interesting. When it comes to legacy code we think of COBOL and FORTRAN most of the time, but probably there is a huge amount of even more exotic…

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
379

reference only — not used in Hall rules or ranking

Total comments
179

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2020-11-25A Modern Compiler for the French Tax CodeFirst breakoutwut42188130
2023-01-30A Modern Compiler for the French Tax CodeBest thread · Latest 20+ point returnsebg18949
2024-07-22A Modern Compiler for the French Tax Code (2021)gnyeki20