What it is
The DSU is the document that gathers the personal, income and asset data of the household. Whoever signs it declares under their own responsibility that the data are true. INPS calculates the ISEE on the basis of the DSU.
Who may need it
- People applying for the ISEE for the first time
- People who need to update household data
Eligibility. Requirements depend on your personal situation and on the rules in force when you apply. This page does not determine whether you qualify: the competent body verifies that.
How it works
- Tell us what you needChoose the service or describe your situation: we point you to the right procedure.
- Prepare your documentsUse the service's document checklist to come to the appointment prepared.
- Meeting and reviewWe review the paperwork together and explain each step in plain language.
- Handling the procedureThe procedure is handled in the way shown by the service's availability label.
Documents commonly requested
DSU — Dichiarazione Sostitutiva Unica · Last reviewed: 11 October 2026
Indicative list: depending on your situation, further documents may be required. Ticks stay on this device only and are not sent anywhere.
Deadlines
We do not publish deadlines we cannot keep reliably up to date. Always check the current time limits on the official source listed on this page.
Fees
Fees are not yet published. They will be explained clearly before any work starts.
Frequently asked questions
Who is part of the household?
The household rules for ISEE purposes are specific and do not always match who lives in the same home. We check your case together against the official instructions.
How much does the service cost?
Fees are not yet published on the website. They will be explained clearly before any work starts, with no obligation.