Business Calculators
Simple, free tools to estimate the taxes a company pays in Portugal, starting with corporate income tax (IRC).
Corporate Income Tax (IRC) Calculator
How much corporate income tax (IRC) does your company owe? This calculator estimates the annual tax from the taxable income, applying the 19 % general rate, the reduced SME rate (15 % on the first €50,000) and adding the state and municipal surcharges (derrama).
Open calculator →Derrama (Corporate Tax Surcharge) Calculator
How much derrama does your company owe? This calculator estimates the municipal surcharge (your council’s rate, up to 1.5 % of taxable profit) and the state surcharge (which only profits above €1.5 million pay, in brackets), the two surcharges that sit on top of corporate income tax (IRC).
Open calculator →IRC Payment-on-Account Calculator
How much does your company pay in IRC payments on account? This calculator estimates the three instalments a company pays in advance during the year (July, September and by 15 December), from the prior year’s tax, withholdings and turnover.
Open calculator →Autonomous Taxation Calculator (IRC)
How much autonomous taxation does your company pay? This calculator estimates IRC autonomous taxation on the most common expenses (company cars, entertainment, undocumented expenses and travel allowances) and raises the rates by 10 percentage points if the company has a tax loss.
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About business calculators
Companies and other legal entities pay tax on their profit under official rules and rates: IRC on the taxable income, the reduced SME rate and the derrama. These calculators help you estimate how much a company pays from those rules. They are educational estimates that do not replace accounting or the Modelo 22 return. Each calculator shows the formula it uses, cites its sources and links to the article that goes deeper.
Learn
- What is corporate income tax (IRC)? →
- What is the derrama (corporate surcharge)? →
- What is an IRC payment on account? →
- What is autonomous taxation (IRC)? →
The calculators provide educational estimates and do not constitute tax or financial advice.