Deadline: notify household to prepare your IRS return
Portugal’s Tax Authority has published its 2026 calendar and highlighted that one of the early steps for preparing the IRS income‑tax return is notifying the tax office about your household composition — a detail that affects tax filing and benefits. Tax‑paying residents should check the official deadlines and ensure household data are up to date before filing season begins.
The IRS withholding tables are government-published schedules used by employers, pension payers and other payers to calculate how much personal income tax (personal income tax (Imposto sobre o Rendimento das Pessoas Singulares) — IRS) must be deducted from each pay period. They take into account gross pay, pay frequency, marital status and dependents; updates (usually published annually or when the budget changes) affect your monthly take-home pay and are reconciled with your annual tax return (Modelo 3).
Portugal recently revised its return legislation to replace the phrase 'voluntary abandonment' with a formal 'duty to abandon', aligning national rules with EU return standards and making an obligation to leave explicit for third‑country nationals subject to removal decisions. For migrants this clarifies legal responsibilities and can affect the timing and procedures of removals, including when assisted or enforced return measures may be used.
The requirement to submit the income tax return by 20 January
Article 119 of the IRS Code establishes a set of reporting obligations for entities that pay income, contributing to the reliability of the tax information that underpins the calculation of tax due by taxpayers. Despite the increasing digitisation of tax processes and the sometimes entrenched perception that some of these ...
