Jurisdiction
Netherlands
Dutch open source is pragmatic and small: agent skills that encode ZZP tax workflows, calculators for income tax and motorrijtuigenbelasting, and tooling shaped by the reality that the Belastingdienst exposes no public filing APIs.
What's missing
Building it? SubmitOpen aangifte tooling. Filing runs through closed government channels, so the open ecosystem stops at calculation and preparation — a rules-as-code model of Box 1/2/3 would be a real contribution.
3 projects tagged Netherlands, ranked by community stars.
UncategorizedMaintained
dutch-tax-income-calculator
stevermeister/dutch-tax-income-calculator
Agent Skills & PluginsActive
nl-tax-agent-skills
cyanxxy/nl-tax-agent-skills
Claude Code/Codex agent skills for preparing Dutch income tax and voorlopige aanslag workpacks.
UncategorizedStale
motorrijtuigenbelasting
hongaar/motorrijtuigenbelasting
🚗 Motorrijtuigenbelasting (MRB) berekenen in JavaScript