OpenTax vs Taxfix

OpenTax plans

• Free foreverFree

Taxfix plans

• Basic — individual annual€39.99 a year
• Basic — individual one-time€49.99, paid once
• Basic — joint annual€59.99 a year
• Basic — joint one-time€69.99, paid once
• StartFree
• Expert Service€20, paid once

Pick OpenTax if…

It suits individual filers preparing a Tax Year 2025 return who want to inspect how figures were calculated. Developers and compatible AI-agent users can also use its API and OpenClaw integration.

Pick Taxfix if…

Taxfix suits individuals and couples who want to prepare a German tax return themselves or have an independent tax adviser prepare it. Its VAT service is aimed at VAT-liable freelancers and businesses with a main residence in Germany, not corporations.