IRS tax deductions in Portugal for 2026 allow for a reduction of up to 35% of general family expenses (capped at €250 per taxpayer) and 15% of health and education costs (limits of €1,000 and €800 respectively). The mandatory filing period for the tax return is between April 1st and June 30th, 2027.
Introduction to IRS 2026 and Fiscal Planning
Efficient management of Personal Income Tax (IRS) in Portugal requires deep knowledge of the IRS Code (CIRS) and constant legislative updates. For many taxpayers, filling out the annual return is seen as a bureaucratic chore, but the truth is that the complete IRS guide reveals that small details can mean hundreds of euros difference in the final refund. In 2026, the complexity of the Portuguese tax system remains a challenge, especially with new incentives for family capitalization and energy efficiency.
The global limit for tax deductions for high incomes can vary between €1,000 and €2,500, depending on the taxable income bracket (Article 78 of the CIRS). Ignoring certain expense categories, such as interest on debts for property rehabilitation or nursing home costs, is a common error affecting over 60% of taxpayers. This article details the less obvious deductions to ensure you don't leave money on the table with the Tax Authority.
1. Urban Rehabilitation and Energy Efficiency Expenses
One of the most forgotten deductions relates to incentives for building rehabilitation. Under the Tax Benefits Statute (EBF), owners who carry out rehabilitation works in properties located in Urban Rehabilitation Areas (ARU) can enjoy significant advantages. The IRS tax deduction is 30% of the charges incurred by the owner for property rehabilitation, up to a limit of €500 in 2026.
2. Nursing Homes and Home Care Expenses
Many taxpayers are unaware that they can deduct expenses for the care of ascendants (parents or grandparents), even if they do not live in the same household, provided their income does not exceed the national minimum wage. The deduction corresponds to 25% of the amounts paid to nursing homes and elderly care institutions, with a limit of €403.75 per year in 2026.
3. VAT Deduction: Invoice Requirement
The tax benefit for requesting an invoice is one of the simplest ways to reduce IRS. You can deduct 15% of the VAT incurred on invoices for: Car and motorcycle repairs, Accommodation and catering, Hairdressers, and Veterinary activities. In 2026, the maximum cumulative limit for this deduction is €250 per household.
4. Education and Training Expenses Abroad
Education expenses incurred in another EU Member State are deductible. The education deduction is 30% of expenses, up to a limit of €800 in 2026, which can rise to €1,000 for displaced students.
5. Alimony Payments: A 20% Deduction
The payment of alimony fixed by court ruling or approved agreement is a tax deduction often forgotten. The taxpayer can deduct 20% of the amounts paid, with no absolute fixed limit, provided they were not considered income for the dependent.
Common Errors to Avoid
- Not validating pending invoices: Invoices must be classified by February 25th.
- Ignoring IRS Jovem: Taxpayers aged 18-35 often forget to claim this partial exemption.
- Omitting foreign bank accounts: IBANs like Revolut or N26 must be declared in Annex J.
Sources and Legal References
- Portuguese Personal Income Tax Code (CIRS), Articles 78, 78-B, 78-C, 84.
- Statute of Tax Benefits (EBF).
- State Budget Law 2026.