Organise your tax year before the year organises you

In 4 min you'll know: how to build your tax calendar before 1 January and hit every deadline like exam season

In Block 1, Lesson 7, we covered IRS (Portugal's personal income tax), withholding tax, NIF (Portuguese tax-ID number) and eFatura (the official tax-invoice tracking portal) — the basics for surviving the tax system. Now you'll learn to master it. It's not enough to know what IRS is; you need to know when, how and where to act to maximise deductions and avoid fines. The rule: set up your tax calendar before 1 January and stick to it like you stick to exam deadlines.

Before you continue: did you remember to validate your invoices in eFatura this year — and what's the deadline for doing so?

(Answer in the next paragraph.)

The Portuguese tax year has unforgiving deadlines. By 15 February: your employer must submit the statement of income paid and tax withheld (modelo 10). You don't do anything, but check that the amount matches your payslips. By 25 March: deadline to update your household details on the Portal das Finanças (if anything has changed). 1 April to 30 June: submit your IRS return (Category A — employment income). By 25 February of the following year: validate all invoices on eFatura. By 31 December: confirm collection deductions, make contributions to PPR (retirement savings plan with tax incentives), charities or similar for effect on the following year's IRS.

eFatura is your best friend — or your biggest oversight. Every invoice with your NIF that the merchant reports to the Portal das Finanças counts towards deductions. But some categories (health, education, housing, care homes) require you to manually enter the document if the provider hasn't reported it. If you don't validate invoices by 25 February, you lose the right to the deduction. There's no second chance — it's money left on the table.

The tax map doesn't stop at IRS. There's IMI (annual municipal property tax) (if you own property), IUC (if you own a car), stamp duty (on certain transactions) and possible payments on account if you're self-employed. Each has its own deadline. A late-filing fine starts at €50 and can reach €2,500. Organisation isn't bureaucracy — it's protecting your money. A tax calendar with phone alerts takes 5 minutes to set up and saves hundreds of euros in fines and lost deductions.

Schedule your key fiscal calendar dates (2 min) →

Your promise: This month, first Sunday at 10am, I will mark every fiscal deadline in my calendar through December.