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Company & IRC
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About this calculator
Bridge accounting profit to taxable profit, then calculate IRC, derrama, state surtax and autonomous taxation.
A transparent company-tax computation.
Free, no account and no card. Every figure shows the rule it came from, for the 2026 income year.
Who this calculator is for
For company managers and accountants who want the bridge from accounting profit to the IRC actually payable.
What it covers
- Tax bridge
- Derrama
- State surtax
- Company vehicles
Questions about this calculator
Why does taxable profit differ from accounting profit?
Add-backs and adjustments sit between the two, and the bridge shows each one separately rather than a single opaque adjustment figure.
What are derrama and the state surtax?
Municipal and state additions on top of IRC, each with its own trigger. The calculator computes them where they apply to your profit.
Do company vehicles matter here?
They can: autonomous taxation reaches some company car expenses, and the calculation includes it rather than leaving it to surface on the return.
Read the rules behind it
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An estimate from the inputs given, not a filed position. Anything submitted to the Autoridade Tributária or Segurança Social through Taxovate is reviewed by a qualified accountant first.