Free business tax calculator · FY 2083/84

Your tax.
A little clearer.

Choose your business structure and enter your annual figures. This is a planning estimate, not your final tax liability.

01Choose your business structure Required
02Enter your annual figures

Your figures stay on this page. They are not saved or sent to an AI service.

Your estimate appears here

A clear result.
Step by step.

Select your structure and enter the figures. We’ll show the estimated amount and how it was calculated.

A breakdown of the calculationThe rules and assumptions usedLinks to official IRD schedules
What this calculator covers
  • A registered resident sole proprietor with business income only, or a company using the general 25% rate.
  • D-01 / D-02 rules only when eligibility is confirmed and the figures qualify.
  • Concessions, credits, prior payments, carried-forward losses and special-sector rules are excluded.
  • This is not a final tax liability or a filing calculation.

Official sources: IRD natural persons and IRD entities, FY 2083/84. Reviewed 6 October 2026.