October 2025 Tax Deadline Guide

Each month brings a unique schedule of meetings with tax authorities—whether it's fulfilling payment obligations or filing reports, depending on the situation. Let's explore the key tax deadlines for 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, marks the deadline to request a cancellation or reduction of the second IRPEF advance payment. Specifically, for taxpayers using tax assistance, this is the last day to notify their employer in writing that they do not wish to make the second or only IRPEF advance payment, or that they wish to make it in a smaller amount than indicated on their payslip (Form 730-3).

Deadlines for October 15

On Wednesday, October 15, the deadline for canceling a Redditi form (and related Redditi Pf correction forms) submitted without an F24 form via the web application ends. The same deadline applies to income registration for non-profit associations under the preferential regime. Furthermore, 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 for tax obligations. A total of 17 events with tax authorities are scheduled for this day:

770/2025 IN SIMPLIFIED FORM | Submitting a prospectus and paying withholdings
CONDOMINIUMS AS TAX AGENTS - Payment of Withholdings
INCOME DECLARATION | Tax payment for those who chose the installment plan
INCOME DECLARATION | Tax payments for ISA holders using a deferral
ENTERTAINMENT TAX - Monthly Payment
INSURANCE COMPANIES | Payment of Deductions
INPS: Contributions to a separate system for freelancers
INPS: Contributions for Employed Persons
VAT - Liquidation and payment of monthly VAT
VAT - Liquidation and payment of monthly VAT for entities facilitating remote sales
VAT - Payment by installments on the VAT balance for 2024
SHORT-TERM LEASE - Payment of deductions from amounts received or paid
OICR - Payment of Income Tax Withholdings
TAX AGENTS - Payment of a substitute tax on productivity growth
TAX AGENTS - Payment of Withholdings
SPLIT PAYMENT — VAT payment from split payments
TOBIN TAX — Monthly payment of tax on financial transactions

Deadlines for October 27

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

Tax deadlines for October 31

Another day full of tax obligations is October 31st. The last day of the month has as many as 24 deadlines:

EXCISE TAXES - Benefits on diesel fuel for motor vehicles for the 3rd quarter of 2025
RENTAL - Registration of lease agreements and payment of registration fees
AUTONALOG | Payment
CANON RAI - Payment of quarterly installments
CASH INTEGRATION - Claims for uncontrollable events for the previous month
UNIQA 2025 CERTIFICATION | Telematic Dispatch
NATIONAL AND GLOBAL CONSOLIDATION | Filing a Declaration
INCOME DECLARATION 2025 FOR HEIRS | Filing
INCOME DECLARATION 2025 FOR IRES ENTITIES | Submission
INCOME DECLARATION 2025 | Innings
FUEL DISTRIBUTORS - Income Data Transfer
NON-PROFIT ORGANIZATIONS AND EXEMPLARY FARMERS - Filing a monthly return on Form INTRA 12
NON-PROFIT ORGANIZATIONS AND EXEMPT FARMERS - Payment of Intra-European VAT
INARCASSA: Income Statement
INPGI: Fees for autonomous journalists - payment
ISCRO — Freelance Benefit Application
VAT - Monthly IOSS Declaration and Liquidation
VAT | OSS Declaration and Liquidation
MODEL 770/2025 - Filing a Declaration
MODEL IVA TR | Refund or compensation of quarterly VAT credit
Tax Amnesty Installment Plan 2018-2022 — Payment of Replacement Taxes
TRANSPARENCY REGIME | Election for 2025-2027
SUPER-AUTO TALK | Payment
UNIEMENS: Submitting data on salaries and contributions for the previous month