Our Tax Calendar, you will see an overview of tax filing deadlines for OECD, G20 and EU countries.
Streamline international tax planning and compliance across your global operations
Deliver accurate cross-border guidance with comprehensive jurisdiction coverage
Optimize tax structures and ensure compliance across 129+ jurisdictions
International tax planning requires navigating complex treaty networks, withholding tax rules, and rapidly changing legislation across multiple jurisdictions—all while managing compliance risk and optimizing tax efficiency.
Hours spent researching treaty provisions and tax rates across jurisdictions
Difficulty comparing scenarios and determining optimal tax structures
Exposure to penalties from outdated or incorrect tax information
Reliance on scattered spreadsheets and inconsistent data sources
Get an overview of tax filing deadlines for OECD, G20 and EU countries.
Includes deadlines to file country by country reports, or master and local files.
Includes information on non-BEPS reporting requirements, such as specific forms, types of required information, and corresponding deadlines.
Convert the information in the Tax Calendar to alarms and be ahead of the deadlines and prepared to file the required forms.
Choose source and destination countries
Specify payment type and amount
SEngine calculates applicable rates
Review alternative structures
Generate reports and documentation
Transform how your team approaches international tax planning with tools designed for accuracy, efficiency, and confidence.
Reduce research time by up to 75% with instant access to tax data
Minimize compliance risk with regularly updated legislative data
Increase accuracy with automated calculations and built-in validation
Scale globally with consistent methodology across all jurisdictions
Support strategic decisions with scenario modeling and comparisons
Improve audit readiness with comprehensive documentation trails
Comprehensive analysis with supporting citations
Side-by-side structure analysis
PDF, Excel, and CSV formats
Trusted by tax professionals worldwide since 1989, with a proven track record in international tax technology
Built by tax experts with deep knowledge of treaty networks and cross-border taxation
Designed specifically for corporate tax teams and advisors handling complex international matters
Join leading multinational enterprises and tax advisors who rely on COMTAX® for accurate, efficient cross-border tax analysis.