Portugal Freelancer Tax Deadlines 2026: The Complete Month-by-Month Calendar
As a freelancer in Portugal, you face deadlines from three separate entities: the tax authority (AT), Seguranca Social, and your own invoicing obligations. Missing any deadline results in fines from EUR 150 to EUR 3,750. This calendar puts every 2026 deadline in one place so nothing falls through the cracks.
How to use this calendar
January 2026
February 2026
March 2026
April 2026
May 2026
June 2026
July 2026
August 2026
September 2026
October 2026
November 2026
December 2026
What happens if you miss a deadline?
First year in Portugal? What applies to you
Recurring monthly deadlines
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