For the three-year duration of their studies, graduate students can be supported by grants at a current monthly amount of about 1200 Euros (free of taxes, fees are waived). The details are given in the Call for Admission.
Scholarships are granted from the Research Ministry, the Politecnico di Milano, the DEIB and CMIC departments (specific research project funds), other public or private Institutions, or companies. The number of available scholarships may change from year to year, tipically 10-12 per year.
Politecnico di Milano allocates Student Aid Benefits and grants for students enrolled in PhD programmes, also to support those that do not have a scholarship. Details for application are available here.