Crypto Country GuideCrypto rules and tax, country by country

Portugal: filing and deadlines

Last reviewed: October 2026

On this page
  1. Deadline calendar
  2. Individuals: step by step
    1. Do you have to file?
    2. Crypto in the return
    3. Extension and corrections
  3. Companies
  4. What providers report (DAC8 and CARF)
  5. Records to keep
  6. Penalties and voluntary correction
  7. Sources
  • The annual IRS return (Modelo 3) is filed online from 1 April to 30 June of the year after the income. For 2025 income, payment or refund follows by 31 August 2026.
  • Taxable crypto gains go in Annex G, table 18; excluded gains on crypto held 365 days or more in Annex G1, table 7; sales through foreign platforms in Annex J, table 9.4.
  • Companies file their corporate income tax return (Modelo 22) by the last day of May.
  • Crypto providers report 2026 data on Portuguese residents to the tax authority by 31 May 2027 (DAC8). A missing return costs €150 to €3,750; paying a reduced fine before any procedure starts is possible.

This page covers when and how to declare crypto to the Autoridade Tributária e Aduaneira (AT). How the tax is calculated is on personal tax and business tax. It is general information, not tax advice.

Deadline calendar

The dates below are for income of 2025, filed in 2026, as published by the AT and in the tax codes. Later years follow the same pattern.

DateWhatWho
2 March 2026Last day to confirm or update your household (agregado familiar) as of 31 December 2025 in the Portal das FinançasIndividuals
1 April – 30 June 2026IRS return (Modelo 3) for 2025, filed online, or confirmation of the automatic returnIndividuals
31 May 2026Corporate income tax return (Modelo 22) for 2025 (calendar tax year)Companies
31 August 2026Refund or payment of IRS for returns filed on timeIndividuals
1 January 2027Providers must have completed due diligence on existing usersCrypto providers
31 May 2027First DAC8 report, on calendar year 2026Crypto providers

Individuals: step by step

Do you have to file?

Residents file an annual return (article 57 CIRS). The exemptions from filing in article 58 cover people whose only income is taxed at the liberatory rates of article 71, small amounts of employment or pension income, and a few other cases. Crypto gains taxed at the 28% autonomous rate of article 72 are not among them, so if you have taxable crypto gains or crypto capital income, expect to file. The return also has a table for gains that are excluded because you held the crypto for 365 days or more; we found no rule that exempts you from declaring them.

Crypto in the return

SituationAnnex and table
Sale of crypto held less than 365 days, or loss of residence for such cryptoAnnex G, table 18A
Sale where the other party is outside the EU/EEA and no treaty appliesAnnex G, table 18B
Sale of crypto held 365 days or more (excluded), also on loss of residenceAnnex G1, table 7 (with the provider, dates and values)
Crypto that are securitiesAnnex G, table 9, code G25
Sale through a platform abroad (foreign source)Annex J, table 9.4
Staking or lending rewards paid in money from abroadAnnex J, table 8, code E25
Business income: crypto operations / miningAnnex B, fields 419 / 422 (foreign source: Annex J, codes B12 / B13)

Each sale needs the dates and values of acquisition and sale and the expenses. Remember that first-in, first-out applies per provider. The option to aggregate crypto gains with your other income is made in the return.

Extension and corrections

There is no general extension of the 30 June deadline. If you have foreign-source income with a tax credit whose amount the source country has not yet set, the deadline moves to 31 December, provided you tell the AT within the normal period (article 60(3) and (4) CIRS). If something changes income you have already declared, or creates an obligation to declare for an earlier year, you file a return within 30 days (article 60(2)).

Companies

Companies send their periodic income return (Modelo 22) electronically by the last day of May, whether or not that is a business day (article 120(1) CIRC). With a tax year that differs from the calendar year, the deadline is the last day of the fifth month after it ends; after a cessation of activity, within 30 days. The figures in the return must match the accounts.

What providers report (DAC8 and CARF)

Law 26/2026 of 3 June 2026 transposes the EU’s DAC8 directive and sets up Portugal’s framework for the OECD Crypto-Asset Reporting Framework (CARF). It applies from 1 January 2026, and the first reports cover 2026.

  • Deadline: crypto-asset service providers report to the AT by 31 May each year for the previous calendar year (article 124-A(3) CIRS, as amended). The AT leaflet of December 2025 still mentions the old deadline at the end of February.
  • What is reported: for each user and type of crypto-asset, the totals of purchases and sales against money, exchanges between crypto-assets, retail payments above USD 50,000, and transfers, including transfers to addresses not linked to a known provider.
  • Due diligence: providers collect a self-certification from each user. A user who does not provide it after two reminders and 60 days is blocked from reportable transactions. Existing users must be covered by 1 January 2027. Records are kept for 10 years.
  • Penalties for providers: a missing report costs €2,000 to €22,500 and a late one €1,000 to €22,500; omissions or inaccuracies are fined separately.

For you as a user, the way you declare does not change, but the AT will receive data from providers in Portugal and, through the exchange between countries, from abroad.

Records to keep

The AT has not published a crypto-specific list of records for individuals. What the rules imply:

  • Keep, per provider and per wallet, the date, quantity and value of every acquisition and disposal, the fees, and the country of the counterparty. You need them for first-in, first-out, the 365-day test and the annexes above.
  • The AT can generally assess tax for four years, counted from the end of the year of the income; this becomes 12 years for undeclared items linked to jurisdictions on the list of clearly more favorable tax regimes (article 45 of the General Tax Law). Keep your records at least that long, and keep the purchase records of crypto you still hold for as long as you hold it.
  • Companies, and self-employed people with organized accounts, keep their books and supporting documents for 10 years (article 123(4) CIRC).

Penalties and voluntary correction

SituationFine (General Regime for Tax Offenses, RGIT)
Return not filed, or filed late€150 to €3,750 (article 116)
Omissions or inaccuracies in a return€375 to €22,500, a quarter of that if no tax is due (article 119)

Compensatory interest (juros compensatórios) is due when the tax is assessed late through your fault, at the legal interest rate (article 35 of the General Tax Law). If you correct a mistake yourself, the RGIT reduces the fine:

  • Before any report, complaint or tax inspection has started, the fine paid at your request is reduced to 12.5% of the legal minimum, provided you pay it within 30 days of notification and regularize the tax in the same period (article 30).
  • During an inspection, until the deadline for your prior hearing, the reduction is to 50% of the minimum.
  • No fine is applied if the offense caused no actual loss of tax revenue, the situation has been regularized, and you have not been convicted of a tax offense or benefited from these reductions in the previous five years (article 29). If tax was not paid, there is always a loss of revenue.

Sources

This page is general information, not tax advice. Rules, amounts and dates change, so check the official sources above before you act.