Personal Income Tax in Portugal, known as Imposto sobre o Rendimento de Pessoas Singulares (IRS), is a progressive tax levied on the annual income of individual residents and non-residents. Taxable income is divided into six main categories: employment, business and professional income, investment income, rental income, capital gains, and pensions. For residents, tax rates are progressive and scale across several brackets up to 48%, with an additional solidarity surtax applied to ultra-high earners. Under specific rules like 'IRS Jovem', young workers entering the labor force can access temporary, multi-year exemptions.
The annual personal income tax (IRS) filing period runs from April 1 to June 30 of the following year. All returns (Modelo 3) must be submitted electronically through the Portal das Finanças. Failing to file on time results in administrative fines ranging from €150 to €3,750. Self-employed individuals must submit invoicing declarations quarterly alongside their annual return, and taxpayers must register/verify invoices on the 'e-fatura' portal to claim personal deductions. The automated IRS Automático system pre-populates returns for taxpayers with simple employment or pension structures. Taxpayers must keep physical tax records for at least five years. Source: Autoridade Tributária e Aduaneira.