Step 2 of 4 · ProjectsBy jurisdiction

5 open source tax projects for Austria.

Every project on the list for Austria, grouped by kind. Global tools have a page of their own. Entries without a warning come first in each group; the labels mark what to check.

5 projects5 maintained4 on the map19 jurisdictions + globalFacts checked 6 Oct 2026

Browse these by tax area

Income tax Corporate tax Benefits Payroll tax VAT & indirect

Tax engines

1 project

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

OpenFisca AustriaEarly OpenFisca model of Austria's tax and benefit system.Tax engineAT

Calculators

1 project

Small tools that compute one tax for one country.

Grenzgaenger-RechnerReact calculator for cross-border workers between St. Gallen and Austria: source tax and social insurance.CalculatorAT · CHFor individual taxpayers

APIs

2 projects

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

einvoice_atSelf-hosted Austrian platform to create, validate and convert ebInterface and Peppol BIS Billing invoices.APIAT

Mews.Fiscalizations.NET libraries that report e-invoices and receipts to six countries' fiscalisation systems, by a hotel vendor.APIAT · DE · ES · HU · IT · SE

Tax datasets

1 project

Rates, treaties and statistics, open and versioned.

myTransferPricing referenceSummaries of 18 OECD transfer pricing country profiles, with a prompt that reviews a Local File against one.Tax datasetAT · BE · BR · DK · FR · DE · GR · IE · IT · LU · NL · PL · SG · ES · SE · CH · UK · US

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.