Understanding when corporate taxes are due is essential for investors operating in Portugal. Moreover, many new investors remain unaware that Portugal offers two of the most competitive corporate income tax (CIT) regimes in the European Union, both of which are available in the Autonomous Region of Madeira. Companies established in Madeira may benefit from the 14.7 per cent regional CIT rate or, under specific conditions, from the 5 per cent regime of the Madeira International Business Centre (IBC). This guide explains the main corporate tax deadlines, shows how the Portuguese system works, and highlights how Madeira’s tax framework can significantly reduce your effective tax burden.
1. Corporate Income Tax in Portugal: The Basics
Corporate income tax (IRC) applies to Portuguese companies on their worldwide income. The general national CIT rate is 20 per cent on the mainland. However, Portugal’s autonomous regions, Madeira and the Azores, apply reduced regional rates. Madeira stands out as the most competitive region for international investors.
The following headline rates are currently in force:
- Mainland Portugal: 20%
- Madeira (general regime): 14.7%
- Madeira IBC (special regime): 5%
Therefore, for many businesses, determining corporate taxes due also involves identifying which rate applies and under which conditions.
2. Key Corporate Tax Deadlines: When Corporate Taxes Are Due
Portuguese companies are required to comply with several annual deadlines related to corporate income tax. These obligations apply to companies on the mainland and in the Madeira Islands.
2.1. Modelo 22 — Annual Corporate Tax Return
The Modelo 22 is the primary corporate income tax return. It determines the final tax payable for the previous financial year.
Deadline: May 31 each year (unless extended). The taxpayer must declare all taxes, deductions, and adjustments by May 31. The final amount of corporate taxes due becomes clear once the Modelo 22 is filed.
2.2. IES/DA — Annual Accounting and Statistical Return
The IES/DA consolidates financial, accounting, and tax information for the company.
Deadline: By July 15 each year. Although the IES does not generate tax by itself, the July 15 deadline may affect the company’s tax compliance record and ability to validate filings.
2.3. Payments on Account — Pagamentos por Conta
These are advance CIT instalments based on the previous year’s tax assessment.
Deadlines: July 31, September 30, and December 15. The amounts are creditable against the final corporate taxes due after filing Modelo 22.
2.4. Additional Autonomous Region Payments (when applicable)
Specific sectors or company structures are subject to autonomous taxation.
3. Madeira’s Corporate Tax Advantage: 14.7% or 5%
While many investors focus on national corporate tax deadlines, fewer realise that Madeira offers two of the most advantageous corporate income tax regimes in the EU.
3.1. Madeira General Regional Regime — 14.7% CIT
Companies operating in Madeira but outside the IBC automatically benefit from the 14.7% rate. This applies to entirely local businesses, including tourism, commerce, services, and retail operations.
In addition, Madeira companies enjoy full access to:
- Portugal’s participation exemption on dividends and capital gains;
- The network of 80+ double tax treaties;
- A unilateral foreign tax credit for income taxed abroad.
As a result, even companies not using the IBC regime can significantly reduce their effective tax burden.
3.2. International Business Centre of Madeira — 5% CIT Rate
The IBC regime is one of Europe’s most competitive frameworks, approved by the European Commission as regional State aid. Companies engaged in international activities may qualify for a 5% corporate income tax rate on eligible income.
This regime applies until December 31, 2027, for newly licensed companies.
Substance Requirements for the 5% Rate
To benefit from the 5% rate, companies must meet economic substance requirements, such as:
- Beginning activity within six months of licensing.
- Creating 1 to 5 local jobs, plus a minimum investment of €75,000 in fixed assets within the first two years; or
- Creating six or more local jobs, with no investment requirement.
- All the economic activity must be carried out by the employees based in Madeira.
Additionally, the annual taxable income under the 5% rate is capped according to the number of employees (e.g., up to approximately €2.73 million for 1–2 employees, €3.55 million for 3–5 employees, and higher for larger teams).
Income exceeding these thresholds is taxed at Madeira’s 14,7% regional rate.
3.3. Why the IBC Matters When Calculating Corporate Taxes Due
Because the IBC rate is only 5%, the practical tax impact of deadline-driven payments (payments on account, autonomous taxes) is substantially smaller. This enables companies to maintain a higher level of liquidity throughout the year.
4. How Companies Should Plan for Corporate Taxes in Portugal
Understanding when corporate taxes are due is only part of the compliance process. Effective tax planning helps companies avoid penalties and manage liquidity.
4.1. Align accounting and tax calendars
Portuguese corporate law requires timely bookkeeping and annual accounts approval before filing the IES. Strong alignment avoids last-minute corrections that may delay filings.
4.2. Forecast advance payments
Payments on account reduce the final corporate taxes due, but they affect cash flow. Companies should forecast these instalments early.
4.3. Assess whether Madeira is a better base
Investors unfamiliar with Madeira’s regimes may assume Portugal has a single CIT rate. In reality, incorporating in Madeira can reduce the company’s tax rate from 20% to 14.7% or even 5%, depending on the eligibility criteria.
Therefore, choosing the correct location at incorporation affects not only when corporate taxes are due, but also how much they are.
5. Key Takeaways
- Companies must file Modelo 22 by May 31 and IES by July 15.
- Advance CIT payments occur in March, July, September, October, and December.
- Madeira offers two reduced CIT regimes: 14.7% and 5%.
- The 5% IBC regime requires substance but offers one of the lowest effective tax rates in Europe.
Understanding when corporate taxes are due ensures full compliance and avoids penalties.
Selecting Madeira can materially reduce the final corporate tax burden.
This article is for general information only and does not constitute legal, tax, or financial advice. Corporate tax obligations vary depending on each company’s structure, activity, and residency. Professional guidance should be obtained before taking any action.
The founding of Madeira Corporate Services dates back to 1996. MCS started as a corporate service provider in the Madeira International Business Center and rapidly became a leading management company… Read more
