Autonomous Taxations: Strategies to Minimize the Impact

By Hugo Ribeiro, Certified Accountant · Member of the Order of Certified Accountants · HVR Business Consulting

Introduction to Autonomous Taxation in the 2026 Fiscal Context Autonomous taxations represent one of the most complex and often most expensive mechanisms of the Portuguese tax system, specifically within the scope of Corporate Income Tax (IRC). Unlike taxation on taxable profit, these fall directly on certain types of expenses incurred by companies, regardless of whether the company shows a profit or loss. In the current 2026 economic context, where cash flow efficiency is vital, understanding Article 88 of the IRC Code (CIRC) is mandatory for any manager. The Portuguese legislator designed th…

Key Takeaways

• Switch to 100% electric fleets to eliminate autonomous tax on vehicles.
• Bill travel allowances to clients to avoid the 5% tax rate.
• Avoid tax losses to prevent the 10% penalty increase in tax rates.
• Strictly document representation expenses to avoid the 50% undocumented rate.

FAQ

What is autonomous taxation?

It is a tax on specific company expenses (vehicles, representation) regardless of profit, as per Article 88 of the CIRC.

How do electric vehicles help save tax?

100% electric vehicles are exempt from autonomous taxation, unlike combustion vehicles which can pay up to 35%.

When does the autonomous tax rate increase?

Rates increase by 10 percentage points whenever the company reports a tax loss for the year.

What is the rate for travel allowances?

A 5% rate applies to travel and mileage allowances, unless these costs are billed to customers.