Tax Deadline Guide for October 2025

Each month brings with it a specific schedule of meetings with tax authorities—whether it's fulfilling payment obligations or filing reports, depending on the situation. Let's find out which key tax deadlines fall in October 2025 and learn everything you need to know about payments for individual entrepreneurs, professionals, companies, and more.

Deadlines for October 10

Friday, October 10, is the deadline for requesting a cancellation or reduction of the second advance payment on Form 730. In particular, for taxpayers using tax assistance, this is the last day to notify their employer in writing that they do not want to make the second or only advance payment on the IRPEF, or that they want to make it in a smaller amount than indicated on the payslip (Form 730-3).

Deadlines for October 15

Wednesday, October 15, marks the end of the ability to cancel the Redditi form (and related ones) via the web application. With it, the corrective forms Redditi Pf), submitted without the F24 form. The same deadline applies to the registration of income for non-profit associations under the preferential regime. In addition, VAT entities must issue and register pending invoices for goods delivered or shipped in the previous calendar month.

Deadlines for October 16

Thursday, October 16, is undoubtedly the busiest day of the month in terms of tax obligations. There are 17 tax deadlines scheduled for this day:

Deadlines for October 27

Monday, October 27, is the deadline to file a supplemental return (Form 730 Supplemental) through CAF or qualified professionals (including employer assistance) if the previous return contains errors that do not affect the tax calculation, or if the correction results in a refund or reduction of the taxpayer's liability.

Tax deadlines for October 31

Another day full of tax deadlines is October 31. There are as many as 24 deadlines scheduled on the last day of the month: