NIF for a Minor in Portugal: How Parents Can Apply (2026 Guide)

Getting a Portuguese NIF (tax number) for a child is common — you may need it for school, healthcare, and other official registrations. Portuguese government guidance even notes that children and young people may need a NIF so parents can include health and education expenses in their annual tax return. This guide explains who can request a NIF for a minor, the documents you’ll need, and the two main routes: in person (Finanças) or online via e-Balcão.