Os juros do crédito são dedutíveis nos Países Baixos (hypotheekrenteaftrek)?

Yes, for an owner-occupied home you can usually deduct your mortgage interest (hypotheekrenteaftrek), provided you repay the loan within the required term using an annuity or linear mortgage. This deduction lowers your taxable income in box 1 and can significantly reduce your net monthly costs. The eigenwoningforfait is added back as a small counterweight.