Step 2 of 4 · ProjectsBy jurisdiction

189 global open source tax projects.

Every project on the list that is not tied to one jurisdiction, grouped by kind. Entries without a warning come first in each group; the labels mark what to check.

189 projects132 maintained78 on the map14 jurisdictions + globalFacts checked 6 Oct 2026

Browse these by tax area

Income tax Corporate tax Benefits VAT & indirect Cross-cutting

Tax engines

11 projects

Rules-as-code that compute liabilities, returns and reforms.

CatalaProgramming language for writing law as code, next to the legal text it implements.Tax engineGlobal · FR

OG-CoreOverlapping-generations model framework for evaluating the economic effects of fiscal policy.Tax engineGlobal · US

OpenFiscaRules-as-code framework: legislation written in Python, served as a web API.Tax engineFR · Global

PolicyEngine CoreCore microsimulation engine for PolicyEngine models, forked from OpenFisca Core.Tax engineGlobal

policyengine.pyPolicyEngine's Python package that brings the country models, analysis and charts together.Tax engineGlobal

tariff-engineRule-based HS classification engine (AI at build time, deterministic at runtime) covering 20 chapters; on npm.Tax engineGlobal

AfCFTA_Rules_of_OriginRust prototype encoding the AfCFTA rules of origin (Article 5) as rules-as-data.Tax engineGlobalDemo

Agent-Based Simulation of International Tax ComplianceNetLogo model of how a foreign tax system's spillover changes domestic tax evasion and avoidance.Tax engineGlobalInactive since 2021

customs-duty-calculator (ShahinHasanov90)Customs duty and tax engine (ad valorem, specific, compound and FTA rates) as a .NET 8 API.Tax engineGlobalDemo

customs-valuation-engineWCO six-method customs valuation engine in TypeScript with Incoterm adjustments and an audit trail.Tax engineGlobalDemoLicence unknown

PolicyEngine LegislationBuilderStreamlit app drafting legislation text from PolicyEngine reform code or plain-English prompts, using OpenAI.Tax engineGlobalNeeds a paid serviceLicence unknown

Calculators

13 projects

Small tools that compute one tax for one country.

corp-finance-coreRust finance library with a transfer pricing feature: tested party versus comparables, range, price by method.CalculatorGlobal

crypto-tax-calculatorImports crypto transactions from exchanges and wallets and produces tax reports.CalculatorGlobalFor individual taxpayers

pillar-two-toolLocal GloBE calculator: ETR, substance carve-out and top-up tax per jurisdiction, QDMTT/IIR/UTPR, GIR export.CalculatorGlobal

tax-provision (Ritesh123423)Browser workpaper for a tax provision: current and deferred tax, movements, journals, ETR reconciliation.CalculatorGlobalLicence unknown

BitcoinTaxerWeb app that calculates capital gains and losses on Bitcoin trades.CalculatorGlobalInactive since 2025For individual taxpayers

cbcr-safe-harbour-monitorMVP that runs the three transitional CbCR safe harbour tests per jurisdiction and year as a risk warning.CalculatorGlobalDemoNeeds a paid serviceLicence unknown

cptpp-projectOCaml CPTPP rules of origin and tariff calculator, written as an educational project.CalculatorGlobalDemo

deep-agentic-supply-chain-ai (Hugging Face Space)Gradio demo that rates an intercompany transaction's risk from the gap between tested and benchmark margins.CalculatorGlobalDemo

DeFi TaxesImports DeFi transactions from many blockchains and calculates the tax; needs paid third-party data APIs.CalculatorGlobalInactive since 2025Needs a paid serviceFor individual taxpayersLicence unknown

permanent-establishment-hubStatic study tool with six permanent establishment calculators across 16 treaties, MLI articles included.CalculatorGlobalDemo

Pillar Two GloBE ETR calculatorPython scripts computing jurisdictional ETR, top-up tax, the UTPR allocation and deferred tax recapture.CalculatorGlobalDemoLicence unknown

Transfer_Pricing (loan spreads)XGBoost model estimating arm's length intercompany loan spreads from synthetic bond data, with a Streamlit UI.CalculatorGlobalDemoLicence unknown

Transfer-Pricing-Risk-AssessmentAndroid app that scores a company's transfer pricing risk from a questionnaire based on the OECD Guidelines.CalculatorGlobalArchivedLicence unknown

Agent skills

11 projects

Packaged tax expertise an AI agent can follow, step by cited step.

Algo-Trading-Skills: transfer pricing for trading groupsSkill with a tested Python engine for intercompany fees in trading groups: cost plus, CUP, TNMM, Berry ratio.Agent skillGlobal

bess-epc-engineering: transfer pricing personaKorean agent persona for a battery-storage group's transfer pricing, BEPS and Pillar Two work under the CFO.Agent skillKR · GlobalLicence unknown

CaseMark skills: transfer pricingTwo agent skills: intercompany transactions (FAR, OECD methods, range) and transfer pricing documentation.Agent skillGlobal

everything-claude-finance: transfer pricingClaude Code skill on OECD transfer pricing methods, comparability steps, three-tier documentation and APAs.Agent skillGlobal

financeskills: deferred tax skillAgent skill for deferred tax under IAS 12 and ASC 740, with a calculator script and evaluations.Agent skillGlobal

ledgerskills: transfer pricing doc outlineClaude Code skill that drafts an OECD Local File outline: FAR analysis, method choice, information request.Agent skillGlobal

legal-ai-skills: transfer pricing documenterSkill that documents an intercompany transaction: FAR, method choice, benchmarking from supplied comparables.Agent skillGlobal

OpenAccountantsTax guides for AI agents, reviewed by named accountants; the guides are source-available, the code open.Agent skillGlobalOA Guide License 1.0

OpenFisca AIGuides, validation tools and agent scaffolding for building OpenFisca country packages.Agent skillGlobal

tp-skill (deylydu)Claude Code skill for in-house transfer pricing: methods, documentation, financing, APA, MAP, Germany first.Agent skillDE · GlobalLicence unknown

vanguard-frontier-agentic: transfer pricing and Pillar Two advisorReference skill on OECD transfer pricing methods, BEPS Action 13 files, Pillar Two and six countries' regimes.Agent skillGlobal

MCP

5 projects

Open connectors and protocols between agents and legislation, case law and ledgers.

Model Context ProtocolThe open standard for connecting AI agents to tools, data and sources.MCPGlobal

OpenFisca MCPMCP interface for interacting with OpenFisca calculations.MCPGlobalLicence unknown

FacturaHub MCPMCP server for invoicing, expenses and tax declarations through FacturaHub's API; e-invoicing for Panama.MCPES · MX · GlobalNeeds a paid service

hs-code-classifier-mcp-serverMCP server that classifies products to HS codes through the HSPing API; needs a key with tiered pricing.MCPGlobalNeeds a paid service

PolicyEngine MCPMCP server for PolicyEngine's database and tax-benefit simulations.MCPGlobalInactive since 2025Licence unknown

Plugins

1 project

Bundles of skills, tools and agents, installable in one go.

FacturaHub pluginClaude plugin with invoicing, expense and e-invoicing tools and skills for Spain, Mexico, Colombia and Panama.PluginES · MX · GlobalNeeds a paid service

APIs

16 projects

Validation, rates, filings and registries you can call directly.

Attest.NET library that validates ID numbers, tax codes, VAT numbers and postal codes in 87 countries.APIGlobal

commerceguys/taxPHP tax library for commerce applications: tax types, zones and rates.APIGlobal

GOBLGo library and schemas for electronic business documents, especially invoices.APIGlobal · EU

invkitTypeScript library for invoice totals with several tax types, stacked discounts and extras.APIGlobal

node-sales-taxNode.js sales tax and VAT calculator with offline rates and an optional VAT number check.APIGlobal

open-logistics-toolsHS code validation and Bangladesh customs duty calculation utilities, published on npm.APIBD · Global

phase4AS4 client and server library with built-in Peppol and CEF eDelivery support.APIEU · Global

phive-rulesE-invoice validation rules for the phive engine, covering many countries.APIGlobalLicence unknown

PolicyEngine APIREST API that computes the impact of tax and benefit policies with the PolicyEngine models.APIGlobal

python-stdnumParse and validate VAT, TIN and company numbers for dozens of countries.APIGlobal

ubl-invoicePHP library to read and create UBL electronic invoices.APIGlobal

CountryValidator.NET library that validates VAT codes and national and tax ID numbers for 82 countries.APIGlobalInactive since 2024

hscode (Go)Go package embedding the HS nomenclature with validation, lookup and search; data under PDDL.APIGlobalInactive since 2025

oecd (JAXB bindings)Java JAXB classes for the OECD CbC v1 and v2 and CRS schemas, with CTS file packaging and an export tool.APIGlobalInactive since 2024Licence unknown

spatie/tax-calculatorPHP interfaces and methods for handling tax calculations in applications.APIGlobalInactive since 2025

UniRate .NET client.NET client for the UniRate API: currency exchange rates and VAT rates by country.APIGlobalNeeds a paid service

Tax calendars

2 projects

Filing and payment deadlines as open, machine-readable feeds.

fiscal_calendarPython package for 4-5-4 and 4-5-5 retail fiscal calendars.Tax calendarGlobalInactive since 2023

tp-calendarGerman Streamlit app listing hard-coded 2024 Local File and Master File deadline rules for 33 countries.Tax calendarGlobalInactive since 2025DemoLicence unknown

Automations

80 projects

Reusable workflows for provisions, reconciliations and compliance runs.

CACAO (IDB)IDB web platform for tax administrations to receive, validate, store and analyse taxpayers' accounting data.AutomationGlobal

CBCR-TPChecks a country-by-country report XML file against the OECD schema, Luxembourg rules and safe harbour tests.AutomationLU · GlobalLicence unknown

Comparables_IdentificationScript that ranks candidate comparables by the similarity of their business descriptions to a tested party.AutomationGlobalLicence unknown

CPAverse Tax Prep AgentAI agent for tax preparation workflow automation, with agent skills and standard operating procedures.AutomationGlobalLicence unknown

crs-lintOffline linter for OECD CRS XML (v2.0, 3.0): schema plus 41 status-message business rules, SARIF output.AutomationGlobal

crs-xml-converterBrowser tool that builds OECD CRS returns (XML v2.0 and v3.0) from a spreadsheet and keeps a filing ledger.AutomationGlobalLicence unknown

docTRDeep-learning OCR library for detecting and recognising text in documents.AutomationGlobal

ExtractThinkerDocument intelligence library that uses LLMs to extract structured data.AutomationGlobal

fatca-ides-phpPHP library that converts bank client data into FATCA XML packages for the IRS IDES gateway.AutomationUS · Global

globe (GIR engine)Reads a GloBE Information Return XML, validates it, applies the OECD's 2026 corrections and exports a redline.AutomationGlobalLicence unknown

MDES XML StudioDesktop app that generates, signs, encrypts and packages CRS, FATCA and CbC test XML for upload into MDES.AutomationGlobalLicence unknown

MinerUTurns complex PDFs and Office documents into structured, LLM-ready text.AutomationGlobalMinerU Open Source License

national-trade-forensicsPython pipeline flagging unit-price outliers (MAD z-scores) and Benford's-law anomalies in trade statistics.AutomationGlobal

nomenclatorAI HS nomenclature toolkit: BM25 and semantic retrieval with DSPy programs for classification and reasoning.AutomationGlobal

OCA account-fiscal-rule (Odoo)Odoo Community modules for tax and fiscal rules in accounting.AutomationGlobal

oecd-tp-searchSemantic search over the 2022 OECD Transfer Pricing Guidelines by paragraph, with citations and GPT analysis.AutomationGlobalLicence unknown

open-globexmlJava web app that prepares, XSD-checks and exports GloBE Information Return XML, with French 2259-SD helpers.AutomationFR · Global

PaddleOCRMultilingual OCR and document-AI toolkit that turns PDFs and images into structured data.AutomationGlobal

paperless-ngxDocument management system that scans, OCRs and indexes documents for search.AutomationGlobal

rotkiSelf-hosted portfolio tracker for crypto and other assets with profit and loss reports for tax.AutomationGlobalFor individual taxpayers

Rules-of-Origin-ExtractorNode microservice that extracts rules-of-origin provisions from 450+ trade agreements in an external database.AutomationGlobal

staketaxcsvPython tool that exports wallet transactions from 25+ blockchains as CSVs for tax software.AutomationGlobalFor individual taxpayers

sydonia-toolkitSQL compiler and reference model for ASYCUDA World (SYDONIA) customs databases, read-only, with a sandbox.AutomationGlobal

Tax Compliance AgentAI agent that checks a company's financial records against sales tax, VAT, corporate tax and payroll rules.AutomationGlobalLicence unknown

taxflowETL command line that segments each entity's P&L into activities by rules and loads SQLite for dashboards.AutomationGlobalLicence unknown

TaxHackerSelf-hosted AI accounting app that analyses receipts, invoices and transactions.AutomationGlobalFor individual taxpayers

TP reconciliation P&L builderAdds a reconciliation P&L per trading partner, with check formulas, to a transfer pricing Excel workbook.AutomationGlobalLicence unknown

TP1-InterCompany-Pricing-PolicyFlask API with RAG over OECD and Indian transfer pricing documents that drafts a seven-section pricing policy.AutomationIN · GlobalLicence unknown

transfer_pricing_cycle_toolPython CLI turning SAP price-list files into SAP upload templates and communication files for a pricing cycle.AutomationGlobalLicence unknown

trytond-customsTryton ERP customs module that adds customs duties based on tariff codes; version 8.2.0 released 5 Oct 2026.AutomationEU · Global

12_taxobservatoryScripts that gather, parse and visualise declared tax data from public country-by-country reports.AutomationEU · GlobalInactive since 2024Needs a paid service

aeoiPre-alpha toolkit that builds and validates CRS XML 2.0 and 3.0, with typed CARF models and Swiss packaging.AutomationGlobal · CHDemo

aeoi (UEk)React and TypeScript MVP for handling AEOI DAC2 and CRS XML files; validation stubbed, a demo.AutomationEU · GlobalDemoLicence unknown

aeoi-editorBlazor editor for AEOI XML files; no README, last commit March 2022.AutomationGlobalInactive since 2022DemoLicence unknown

afcfta-rules-of-origin-navigatorCLI assessing AfCFTA rules-of-origin eligibility (regional value content) with Python and a local LLM.AutomationGlobalDemoLicence unknown

AI-Transfer-Pricing-Intelligence-EnginePython engines for arm's length tests, comparables, FAR, risk and scenarios over a sample case dataset.AutomationGlobalDemoLicence unknown

Automating Comparable Company Search in Transfer PricingTwo notebooks that scrape company web pages and rank comparables by TF-IDF cosine similarity.AutomationGlobalDemoLicence unknown

beps-pillar-two-data-gap-copilotStreamlit demo that maps source data to Pillar Two fields, finds data gaps and triages the safe harbours.AutomationGlobalDemoLicence unknown

BM_CCRails app to review and filter company data exported from Orbis or Diane for transfer pricing benchmarking.AutomationGlobalInactive since 2022Needs a paid serviceLicence unknown

CbCR_to_Excel (Hugging Face Space)Gradio app that cuts country-by-country report tables out of PDFs into Excel files, with manual treatment.AutomationGlobalInactive since 2025

cbcr-foundry-rawCbCR effective-versus-statutory rate pipeline on Palantir Foundry that flags filings for audit; needs Foundry.AutomationGlobalNeeds a paid serviceLicence unknown

CbCRRiskAnalyzerSpring Boot and React app that stores CbCR data per company and country and scores transfer pricing risk.AutomationGlobalDemoLicence unknown

common-reporting-standardC# utility turning a CRS-formatted spreadsheet (schema v1) into CRS XML; written in a day, for an old schema.AutomationGlobalInactive since 2019Licence unknown

ConvertidorXmlFatcaPython app converting one Guatemalan group's Excel files into FATCA XML; no README, identifiers hard-coded.AutomationGlobalInactive since 2025Licence unknown

deferred-tax-agentClaude-assisted local GAAP depreciation research and IFRS versus local GAAP deferred tax on dummy data.AutomationGlobalDemoNeeds a paid serviceLicence unknown

Due Diligence AgentsM&A due diligence agents for data rooms, with a tax agent for transfer pricing, tax attributes and structure.AutomationGlobalNeeds a paid service

fatca (larh76)Maven base project to generate, validate, sign and upload FATCA and CRS XML; README in Spanish.AutomationGlobalInactive since 2025Licence unknown

fatca-data-preparationJava FATCA data package preparation with sample IDES payloads.AutomationUS · GlobalInactive since 2023Licence unknown

fatca-viewerC++ form application that loads and edits FATCA XML in a table view; its README says it is not yet tested.AutomationGlobalInactive since 2022DemoLicence unknown

FATCA-XML-ReportingCOBOL program that generates FATCA XML reports from mainframe data.AutomationGlobalInactive since 2017Licence unknown

fatcacrsLocal FastAPI and React prototype that converts Excel files into CRS XML (FC v2.2); FATCA records planned.AutomationGlobalDemoLicence unknown

FATCAXMLBatcherJava utility that builds, parses and batches FATCA XML files.AutomationUS · GlobalInactive since 2016Licence unknown

GenAI_Transfer_Pricing_Automation_PrototypeLangChain RAG prototype that fills a Word transfer pricing report template with Llama 3 text and a P&L table.AutomationGlobalDemoLicence unknown

GMT24Next.js prototype that maps group data to a Pillar Two model, runs GloBE calculations and prepares a GIR.AutomationGlobalDemoLicence unknown

IsabellaBookkeeping agent on IBM watsonx that reads receipts and categorises expenses, built for a hackathon.AutomationGlobalInactive since 2025DemoNeeds a paid service

java-email-parserJava tool that fetches and parses FATCA IDES notification e-mails.AutomationUS · GlobalInactive since 2016Licence unknown

llmthon-tp-benchmarkPlaywright tool visiting each comparable's website; Gemini accepts or rejects it and a screenshot is kept.AutomationGlobalDemoNeeds a paid serviceLicence unknown

MergeRiskAIAI M&A tax risk assessment for due diligence: pulls liabilities, audit flags and contingencies from documents.AutomationGlobalNeeds a paid serviceLicence unknown

oecd-tpg-viewer-NACE-look-upStatic site with NACE and NAICS code finders and crosswalks, plus a small OECD Guidelines paragraph viewer.AutomationGlobalInactive since 2025Demo

OTP-PlatformOperational transfer pricing demo: processes, a calc studio, an intercompany allocation engine, audit trail.AutomationGlobalDemoLicence unknown

OTP-SynthDataStreamlit generator of synthetic intercompany flows with a rule engine that allocates profit by function.AutomationGlobalDemoLicence unknown

pillar-two-tax-analyticsdbt models on Snowflake that compute GloBE income, covered taxes and top-up tax for a synthetic group.AutomationGlobalDemoNeeds a paid serviceLicence unknown

pillar2 (risk dashboard)Static HTML and JavaScript Pillar 2 tax-risk dashboard built on synthetic insurance scenario data; one commit.AutomationGlobalDemoLicence unknown

Pillar2_New_WorkingSAP CAP prototype with an SAPUI5 interface and Excel output for a Pillar 2 project; one of several copies.AutomationGlobalDemoLicence unknown

sovereign-risk-platformCustoms trade risk scoring platform with twelve risk types for declarations; a portfolio project.AutomationGlobalDemo

tariffaiHS6 classification engine: hybrid Qdrant and BM25 search with LangGraph reasoning over WCO schedules.AutomationGlobalNeeds a paid service

Task002-etr-risk-cockpitPython toolkit computing entity ETR metrics, running nine rule-based controls and writing CSV, Excel, a memo.AutomationGlobalDemoLicence unknown

Task004-payments-tax-governance-cockpitPayments tax governance toolkit simulating product-launch tax control and risk review across jurisdictions.AutomationGlobalDemoLicence unknown

Tax Observatory CbCR extraction demoStreamlit demo of the EU Tax Observatory pipeline that downloads public CbC reports and extracts their tables.AutomationGlobalInactive since 2025

tax-data-engineering-labValidates synthetic intercompany line items with five rules and builds a seller-by-buyer matrix in euros.AutomationGlobalDemo

tp_appStreamlit app: entities, transactions, interquartile benchmarking (TNMM, gross margin, CUP) and a DOCX report.AutomationGlobalInactive since 2025DemoLicence unknown

tp-assistant (TP ORCA)Next.js app writing risk, control, test and evidence frameworks for a transfer pricing scenario with Claude.AutomationGlobalDemoNeeds a paid serviceLicence unknown

TP-WorkspaceFilters term-loan tranches from a loan-data export into accepted and rejected sheets.AutomationGlobalInactive since 2025Licence unknown

trade-classifyLLM HS-code classification with grounding guardrails, a trust boundary and a precision evaluation; a demo.AutomationGlobalDemo

transfer-pricing-application (TP Copilot)Hackathon transfer pricing copilot in Next.js: dashboard, FAR, benchmark, report and audit views on demo data.AutomationGlobalDemoLicence unknown

Transfer-Pricing-ManagerWeb app to record group companies, related-party transactions and the status of each transfer pricing file.AutomationGlobalInactive since 2022DemoLicence unknown

transfer-pricing-pipelineCleans a sample ERP export, derives each entity's role and tests its margins against benchmark ranges.AutomationGlobalDemo

transfer-pricing-platformFastAPI service scoring transfer pricing risk from operating margin and return on assets against fixed ranges.AutomationGlobalDemoLicence unknown

TurboTPLangGraph and Gemini workspace for transfer pricing research, Local and Master File drafts, a RAG assistant.AutomationUS · GlobalDemoNeeds a paid serviceCC BY-NC 4.0

XMLFileGeneratorJava service that generates FATCA and CRS XML files from client records with JAXB.AutomationGlobalInactive since 2023Licence unknown

Tax datasets

42 projects

Rates, treaties and statistics, open and versioned.

hs-code (ronnieaban)Hierarchical HS code classification dataset, one CSV of about 1 MB; no source or year on the card.Tax datasetGlobal

International Technology Licensing, IP Rights and Tax Havens (Santacreu) replicationStata and Matlab replication package for Santacreu (REStat 2026) on technology licensing, IP and tax havens.Tax datasetGlobal

OpenFisca policyHelpers for policy analysis on survey data with OpenFisca.Tax datasetGlobal

OpenFisca survey managerTool for managing the survey data used in OpenFisca microsimulations.Tax datasetGlobal

product_hscode11,509 product descriptions mapped to HS codes, with a train and test split; provenance undocumented.Tax datasetGlobal

profit-shifting-explorerPlotly web explorer of country-year and industry-year profit-shifting estimates from Delis et al. (JAE 2025).Tax datasetGlobalLicence unknown

stata-project-profit-shiftingStata project that replicates and updates the Atlas of the Offshore World profit-shifting series (TWZ 2023).Tax datasetGlobalLicence unknown

taric-opendataAutomated mirrors of tariff data from 18 sources (EU TARIC, GB, NO, CH, US) plus EBTI and ATaR rulings.Tax datasetEU · UK · NO · CH · US · Global

Tax Justice Network Data PortalTJN portal of 350+ data points on 195 countries: tax haven and financial secrecy indices.Tax datasetGlobalNon-commercial use only

Trade-misinvoicing estimator replication40 Python scripts and cached UN Comtrade data for a paper on non-identified trade-misinvoicing estimators.Tax datasetGlobal

unitary-taxation (Tax Justice Network)Python pipeline estimating each country's revenue change under global unitary taxation from OECD CbCR data.Tax datasetGlobal

us-dividend-whtCC0 dataset of US dividend withholding rates for non-residents by country of residence, CSV and JSON.Tax datasetUS · Global

Assets in Periphery (Garcia-Bernardo, Stausholm) dataCountry and city counts of LinkedIn profiles by occupation (tax, transfer pricing, wealth) plus covariates.Tax datasetGlobalInactive since 2022

Atlas of the Offshore World (data downloads)EU Tax Observatory downloads: country estimates of profits shifted and tax lost, 2015-2020.Tax datasetGlobalInactive since 2023Licence unknown

China in Tax Havens (replication)Stata, R and shell scripts plus public GCAP input data to replicate 'China in Tax Havens' (AEA P&P 2023).Tax datasetCN · GlobalInactive since 2024

CIAT Tax Treaty DatabaseExcel database of double tax treaties and information exchange agreements of CIAT member countries.Tax datasetGlobalInactive since 2024Licence unknown

Corporate tax database (Todtenhaupt)Stata dataset of corporate tax rules for 46 EU and OECD countries: rates, SME thresholds, WHT, depreciation.Tax datasetGlobalInactive since 2022

Customs-Declaration-Datasets54,000 synthetic customs import declarations generated with CTGAN by KAIST and GIST with Korea Customs.Tax datasetKR · GlobalDemo

dbs_empirical_analysisPython and Stata scripts for a master thesis on how MNEs' unrelated-party revenues respond to corporate tax.Tax datasetGlobalInactive since 2023Licence unknown

ETR_GMT_replication (World Bank)Stata and R code to reproduce World Bank work on effective tax rates, firm size and the global minimum tax.Tax datasetGlobalInactive since 2025

EU Tax Observatory CbC reports (Data For Good)Some 400 public country-by-country reports (PDF, XLS) collected by the EU Tax Observatory, with CSV extracts.Tax datasetGlobalInactive since 2024Licence unknown

EU Tax Observatory tax deficit report (code and data)Input data, Stata do-files and output tables behind the EU Tax Observatory's 2021 tax deficit report.Tax datasetEU · GlobalInactive since 2021Licence unknown

Generation of machine-readable CbC reports with LLMs (Yusyn) dataOutputs of nine LLMs asked to turn eight text CbC test cases into OECD CbC XML (schema v2.0), as JSON and XML.Tax datasetGlobalInactive since 2025

Global profit shifting from CbCR micro data (Fuest et al.)Stata replication package for Fuest et al. (JEEA) on profit shifting measured in German CbCR micro data.Tax datasetDE · GlobalInactive since 2024

global-tax-treaty-networkNetwork analysis of bilateral tax treaties from OECD treaty-based withholding rate data, with CSV outputs.Tax datasetGlobalDemo

How Much MNCs Pay in Taxes (Godar) replicationStata, R Markdown and Excel files behind a paper on what MNCs pay in tax, from voluntary CbC reports.Tax datasetGlobalInactive since 2022

Long way to tax transparency (Godar) replicationStata code and hand-collected data on ten voluntarily published country-by-country reports, with outputs.Tax datasetGlobalInactive since 2023Licence unknown

MNCs and Tax Havens: CbCR (Garcia-Bernardo, Janský, Tørsløv)Jupyter notebooks and data behind a 2021 paper on effective tax rates and profit shifting to tax havens.Tax datasetUS · GlobalInactive since 2021

Multinationals' Sales and Profit Shifting in Tax Havens (data and code)Data, code and results for Laffitte and Toubal on US multinationals' sales and profits booked in tax havens.Tax datasetGlobalInactive since 2021Licence unknown

Phantom FDI database (Damgaard, Elkjaer, Johannesen)Global FDI network 2009-2017 split into real and phantom FDI, with Stata code and a tax-exposure dataset.Tax datasetGlobalInactive since 2022Licence unknown

phd_thesis_rep (Heitmüller)R code and data behind the figures and tables of Frederik Heitmüller's PhD thesis on international tax rules.Tax datasetGlobalInactive since 2023Licence unknown

pillar-two-instruct1,463 synthetic instruction-response pairs on the OECD Pillar Two GloBE rules, for LLM research and tuning.Tax datasetGlobalDemo

Profit shifting and revenue losses (Janský, Palanský) replicationStata do-file and results table for Janský and Palanský (2019) on profit shifting and tax revenue losses.Tax datasetGlobalInactive since 2021Licence unknown

Profit Shifting in a Globalized World (Dharmapala) dataAEA P&P 2019 replication data: a Stata dataset coding OECD countries' anti-avoidance measures 2000-2014.Tax datasetGlobalInactive since 2019Licence unknown

replication_cbcr (formulary apportionment)Jupyter notebook allocating US MNEs' IRS CbCR profits under formulary apportionment variants (GFA, IMF, OECD).Tax datasetUS · GlobalInactive since 2019Licence unknown

Royalty Taxation under Tax Competition (Juranek et al.) dataExcel data for Table 1 of Juranek, Schindler and Schneider (CJE 2023) on royalty taxation and profit shifting.Tax datasetGlobalInactive since 2023CC BY-NC 4.0

SEZs and BEPS Action 5 (Heitmüller, Mosquera)Zenodo snapshot of an R repository with data and code for a paper on special economic zones and BEPS Action 5.Tax datasetGlobalInactive since 2021

TaxGraphKnowledge graph of multinationals and their links, where tax avoidance strategies are subgraph queries.Tax datasetGlobalInactive since 2020

Taxing across Borders (Zucman) dataJEP 2014 replication data for Zucman's 'Taxing across Borders': one Excel workbook and a short ReadMe.Tax datasetUS · GlobalInactive since 2019Licence unknown

The Missing Profits of Nations (replication)Replication archive for Tørsløv, Wier and Zucman's The Missing Profits of Nations (REStud): data and Stata.Tax datasetGlobalInactive since 2022

Trade-IFFR scripts replicating Lepissier, Davis and Ibrahim (2021) on illicit financial flows from trade misinvoicing.Tax datasetGlobalInactive since 2022Licence unknown

vynfi-group-audit-enterprise-2000Synthetic 2,000-entity group audit dataset: consolidation, intercompany eliminations and audit workpapers.Tax datasetGlobalDemo

Benchmarks

3 projects

Evals that show whether a model reasons about tax, or guesses.

HSCodeCompExpert-level benchmark for HS code classification agents on e-commerce products, from Alibaba's MarcoPolo.BenchmarkGlobal

Legora transfer pricing caseEvaluation case for AI: draft a transfer pricing Master File from case documents, graded on 175 criteria.BenchmarkGlobal

PolicyBenchBenchmark of how well frontier AI models estimate household tax and benefit outcomes without tools.BenchmarkGlobal

Models

5 projects

Open AI models trained or tuned for tax text.

hs-code-classifier-en (Kenpache)HS6 classifier fine-tuned from bge-m3 (71.9% top-1 on full descriptions in its test set), with weights.ModelGlobal

hscode-classifier-en (ENTUM-AI)Deep-learning HS code classifier for English product descriptions, with weights.ModelGlobal

hscodeclassifyModernBERT classifier of product descriptions into the 20 HS chapters; chapter level only.ModelGlobal

AI-Powered-Tax-OptimizationRandom Forest model and Flask API that return one optimised tax figure from nine financial inputs.ModelGlobalInactive since 2024DemoLicence unknown

hs-code-classifier (ShahinHasanov90)TF-IDF and LightGBM HS code classifier with a FastAPI service for English, Russian and Azerbaijani text.ModelGlobalDemo

Labels mark what to check before you rely on an entry: inactive or archived code, demos, paid services and unclear licences. Only maintained projects for companies and tax authorities appear on the map. Search and filter the whole list.

Missing a project? Add it to the list.

Submit a project

Next · Step 3 of 4The gapsThe activities with no open project yet, and the partly covered ones, with what to build on.