Portugal packs a lot into its annual cycle, and extensions are frequent. The corporate income tax return (Modelo 22) is due at the end of May, the combined annual accounts and tax information filing (IES) is due in mid July, and three advance tax payments follow. The government has often extended these dates by order of the tax authority, which makes it easy to confuse a temporary relief with the standard rule.

This guide covers the private limited company (sociedade por quotas, Lda.), the usual vehicle for a foreign-owned subsidiary, and notes where the public limited company (sociedade anónima, S.A.) and a branch differ. It is written for founders and for legal, finance and operations teams.

Updated November 9, 2026. Portuguese filing dates are adjusted by dispatch from the tax authority, so this guide separates standard dates from temporary extensions and tells you where to confirm them on the Finance Portal.

Entity compliance Portugal: the quick answer

• File the corporate income tax return (Modelo 22) by 31 May for a calendar-year company, subject to extensions. For the 2025 tax year, one adviser describes 30 June 2026 as the definitive deadline.

• File the simplified business information return (IES) by 15 July for a calendar financial year, unless the authority extends it. It covers accounts, tax, statistics and the central bank in one submission.

• Pay corporate tax in three advance instalments, due by 31 July, 30 September and 15 December, according to professional sources.

• File monthly VAT, invoice and payroll communications, and keep the central beneficial owner register (RCBE) current.

What determines a Portuguese company's compliance requirements?

The company type, size and tax regime decide the workload. Lda. companies must keep organised accounting, and the accounts must be approved by the partners within the period in the Commercial Companies Code, which professional sources place at three months after year-end. Larger companies need a statutory auditor, and the auditor's report is part of the annual disclosure package.

Tax profile matters. The general corporate income tax rate is around 20 percent, according to professional sources, and the government has legislated gradual reductions through 2028. Municipal and state surcharges can apply on top, and different rules apply in Madeira and the Azores, so confirm the rate for your location and profit level.

Annual entity requirements in Portugal: the core checklist

1. Approval of the accounts

The management prepares the accounts and the partners approve them at a general meeting or by written resolution, normally within three months after the financial year-end. Keep the approval record, because the IES filing relies on it. Late approval is a common cause of a late IES.

2. Modelo 22 corporate income tax return

Companies file the periodic income return electronically through the Finance Portal. Professional sources give 31 May for calendar-year companies, and news sources show frequent extensions, for example a deadline extended to 15 July for the 2023 tax period and another extended date in June 2026 for the 2025 period. The extensions come without penalties but they are one-off measures, so plan for 31 May and treat an extension as a bonus.

3. IES filing

The IES is a single declaration that satisfies several bodies: the tax authority, the commercial registry, the statistics institute and the central bank. The standard date is 15 July, according to professional sources, and the authority extended the date to 31 July in 2024 to follow an extension of the tax return. A dormant company still files. The IES must match the accounting and the Modelo 22, because inconsistencies can lead to corrections or inspections.

4. Payments on account

Advance corporate tax payments are based on the prior year's assessment and are due by 31 July, 30 September and 15 December. They are credited against the tax in the next Modelo 22, so build them into the cash plan.

5. Beneficial owners and other annual items

Portuguese companies file beneficial owner data in the central register (RCBE), with updates within a short period of changes and an annual confirmation, according to professional sources, so check the current dates. Companies also submit the annual single report on employment (Relatório Único) around April and, for groups, global minimum tax information when in scope.

Tax and indirect tax obligations

The standard VAT rate on the mainland is 23 percent, with reduced rates and lower rates in the islands. Companies communicate invoices and send SAF-T files monthly, generally by the fifth of the following month, and file VAT returns monthly or quarterly. Employers file monthly social security remuneration declarations, around the eleventh of the month, and remit withholding taxes.

Dividends, interest and royalties paid to non-residents can attract withholding tax, with reductions under treaties and EU directives when documents are in place. Related-party transactions require arm's-length terms and documentation, and thin capitalization and interest limitation rules can restrict deductions.

Foreign-owned subsidiaries

Foreign persons can own Portuguese companies. An Lda. needs at least two quotaholders or a single-quotaholder form, one or more managers, a registered office in Portugal and share capital, which can be as low as one euro. Foreign quotaholders obtain a Portuguese tax number, and non-EU residents usually need a fiscal representative, according to professional sources. Foreign corporate quotaholders provide apostilled documents with certified translations.

Banks apply due diligence to foreign-owned accounts and ask for beneficial owner evidence. Check any sector restrictions, and keep intercompany loans, services and royalties documented with contracts and pricing support.

First-year and event-triggered obligations

In the first year, the company is registered with the commercial registry and the tax authority, registers for VAT, registers with social security if it hires, files its beneficial owner data, obtains digital access to the Finance Portal and opens a bank account. The first financial year follows the articles.

Events that trigger filings include a change of managers, a quota transfer, a capital change, a change of registered office, a change of articles, a merger and a dissolution. Many are registered with the commercial registry and some need a deed, and ownership changes affect the RCBE.

Employment and local requirements

Portuguese employers register employees with social security before work starts, pay contributions and give written contracts. Employees have 22 working days of annual leave, a holiday allowance and a Christmas allowance, notice rights tied to service and strong protection against dismissal. Collective agreements apply in many sectors. Many foreign-owned subsidiaries use a local payroll provider.

Record-keeping and governance in Portugal

Accounting and tax records must be kept for ten years under common practice for commercial and tax purposes, according to professional sources, so confirm with your accountant. Keep the approved accounts, the partners' resolutions, the IES submission receipt, the auditor's report if any, and the proofs of payment of each advance instalment. A foreign parent should name one person to track dates, because the Finance Portal notifies filers of extensions only at the last moment.

Build a compliance calendar for Portugal

A compliance calendar turns the rules above into dated tasks with named owners. Start from the financial year-end and the incorporation anniversary, then add the recurring monthly and quarterly items. Review it each quarter, because deadlines, extensions and registry systems change.

• January to March: close the books and brief the auditor.

• By the end of March: approve the accounts.

• By 31 May, or the extended date: file Modelo 22.

• By 15 July, or the extended date: file the IES.

• 31 July, 30 September, 15 December: pay the advance corporate tax instalments.

• Monthly: SAF-T and invoice communications, VAT, payroll and withholding.

Common mistakes

• Treating an extension as the standard deadline.

• Filing the IES before the accounts are approved.

• Inconsistencies between the IES, the accounts and Modelo 22.

• Forgetting the three advance payments.

• Neglecting the RCBE after a change.

• Not appointing a fiscal representative when needed.

Entity compliance Portugal: frequently asked questions

When is the Portuguese corporate tax return due?

Professional sources give 31 May for calendar-year companies, and the authority has often extended it.

What is the IES?

A single declaration that covers accounts, tax, statistics and central bank reporting.

When is the IES due?

By 15 July for a calendar financial year, unless extended.

How many advance payments are there?

Three, due in July, September and December, according to professional sources.

What is the VAT rate?

23 percent on the mainland.

Do dormant companies file?

Yes. They have fewer figures to report but the same deadlines.

How CoverPin can help

CoverPin helps finance, legal and operations teams track entity obligations across countries. See our international entities overview, learn about compliance advisory, or browse more guides in our legal and compliance resources.

This article is general information, not legal, tax or accounting advice. Confirm current requirements with the relevant authority or a qualified local adviser before acting.